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Journal articles on the topic 'Software TRNSYS'

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Published: 4 June 2021

Last updated: 4 February 2022

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Kassai, Miklos. "Development and experimental validation of a TRNSYS model for energy design of air-to-water heat pump system." Thermal Science 24, no. 2 Part A (2020): 893–902. http://dx.doi.org/10.2298/tsci181206070k.

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The object of this research work is the comparison of the annual primary energy consumption of different types of heating systems, using two different calculation methods. The TRNSYS 18 software makes use of dynamic simulation, while the WinWatt software calculates according to the Hungarian implementation of EPBD (Decree No. 7/2006). There were differences in results which could be caused by the more precise calculation of the TRNSYS software. Differences were shown also in the weather data used by the two computer tools that had one of the most important effects on the results according this investigation. The number of heating degree days used by TRNSYS is 10% less, than that the Hungarian decree provides. Using the yearly measured energy consumption data given by the inhabitant of the investigated family house, the validation of the developed dynamic building energy simulation model by TRNSYS could be also achieved with good agreement.

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Popel, O. S., S. E. Frid, and E. E. Shpilrain. "Solar thermal power plants simulation using the TRNSYS software." Le Journal de Physique IV 09, PR3 (1999): Pr3–599—Pr3–604. http://dx.doi.org/10.1051/jp4:1999395.

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Ahmadu, T. O., C. O. Folayan, and F. O. Anafi. "Modeling, Simulation and Optimization of a Solar Absorption Air Conditioning System for an Office Block in Zaria, Nigeria." International Journal of Air-Conditioning and Refrigeration 24, no. 02 (2016): 1650012. http://dx.doi.org/10.1142/s2010132516500127.

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In this study, a solar absorption air conditioning system has been modeled simulated and optimized for an office block covering a total floor area of 90[Formula: see text]m2using the TRNSYS 16 software. Meteorological data over a period of a typical year for Zaria in Nigeria where the office block is located was used in the simulation and optimization. The hourly cooling energy demand of the office block for the whole year was simulated using the TRNSYS sub program TRNbuild. The peak cooling energy demand was used to size the components of the solar absorption air conditioning system. Based on the initial sizes, a TRNSYS model of the air conditioning system was developed. The simulation and optimization process was done by employing a monthly average data approach in which the TRNSYS software was combined with Microsoft excel. The simulation was done on an hourly time step, optimization was done by studying effect of varying system component sizes on performance indices: coefficient of performance (COP), solar coefficient of performance (SCOP) and solar fraction (SF). Results indicate that the system is capable of attaining an average annual SF of 0.79 in the given location.

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Kny, Martin, and Miroslav Urban. "TRNSYS Software Model of Solar System with Long-Term Storage." Advanced Materials Research 649 (January 2013): 303–6. http://dx.doi.org/10.4028/www.scientific.net/amr.649.303.

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The article describes a model of a real solar system created in the Trnsys simulation tool. 2011 data were used as the input data (solar radiation, exterior temperature, heat consumption). The output data from the computed model were compared to the values recorded by a monitoring system.

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Bezhan, Volodymyr, Volodymyr Zhytarenko, Olga Yakovleva, Oleksii Ostapenko, and Mykhailo Khmelniuk. "Energy audit for complex energy system simulated using TRNSYS software." Energy engineering and control systems 6, no. 1 (2020): 33–42. http://dx.doi.org/10.23939/jeecs2020.01.033.

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Serbouti, Abdelhadi, Mourad Rattal, Abdellah Boulal, Mohammed Harmouchi, and Azeddine Mouhsen. "Application of sensitivity analysis and genopt to optimize the energy performance of a building in Morocco." International Journal of Engineering & Technology 7, no. 4 (2018): 2068. http://dx.doi.org/10.14419/ijet.v7i4.13280.

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The worldwide demographic and economic growth increases the global need for energy and directly contributes to climate change. In Morocco, the residential real estate is the third largest consumer of energy after transport and industry sectors. Thus, the aim of this study is to help engineers improve the energy performance of residential buildings by coupling the TRNSYS software both with a sensitivity analysis method and with an optimization tool. In fact, sensitivity analysis allows reducing the number of input parameters of any studied model, by ranking their degree of impact on any chosen output, and then discard the parameters with the least influence on that output. To do so, we developed algorithms in Python programming language to combine the open source library SALib, available in Github platform, with the TRNSYS software. Then, the chosen input parameters can be optimized through coupling the generic optimization program Genopt with TRNSYS. This article will also explain how these tools were applied to reduce the heating & air-conditioning needs of a high-energy consumption building in Morocco, while studying the variation of nineteen input parameters in TRNSYS. The main aim is to meet the energy performance requirement of the Moroccan thermal regulation for buildings.

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Sebarchievici, Calin. "Performance assessment between a ground coupled and air source heat pump used for domestic hot water preparation." E3S Web of Conferences 111 (2019): 06075. http://dx.doi.org/10.1051/e3sconf/201911106075.

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A ground-coupled heat pump system (GCHP) and an air source heat pump (ASHP) driven by photovoltaic panels are used to provide domestic hot preparation for a NZEB house. The experimental measurements are used to test both the heat pump models in the same conditions of water temperature and volume of domestic hot water. A comparative analysis of the two heat pumps for domestic hot water preparation is performed. In addition, using the software TRNSYS (Transient Systems Simulation), two numerical simulation models of thermal and electrical energy consumption in DHW mode are developed. Finally, the simulations obtained using TRNSYS software are analysed and compared to the experimental data.

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Beckman, William A., Lars Broman, Alex Fiksel, et al. "TRNSYS The most complete solar energy system modeling and simulation software." Renewable Energy 5, no. 1-4 (1994): 486–88. http://dx.doi.org/10.1016/0960-1481(94)90420-0.

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Nayak, Ajaya Ketan, and Aya Hagishima. "Modification of building energy simulation tool TRNSYS for modelling nonlinear heat and moisture transfer phenomena by TRNSYS/MATLAB integration." E3S Web of Conferences 172 (2020): 25009. http://dx.doi.org/10.1051/e3sconf/202017225009.

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Software for numerical simulation of various types of energy used in buildings, i.e. building energy simulation (BES), have become an essential tool for recent research pertaining to building physics. TRNSYS is a well-known BES used in both academia and the construction industry for a wide range of simulations, such as the design and performance evaluation of buildings and related facilities for heating, cooling, and ventilation. TRNSYS has a modular structure comprising various components, and each component is interconnected and compiled through a common interface using a FORTRAN compiler. Its modular structure enables interactions with various external numerical simulation tools, such as MATLAB, Python, and ESP-r. For ordinary simulations of building energy load using TRNSYS, the generic module Type 56 is usually recommended, which provides detailed physics modelling of building thermal behaviours based on unsteady energy conservation equations and Fourier’s law for each building material. However, Type 56 explicitly depends on the transfer function method to discretise the original differential equations; therefore, it cannot model nonlinear phenomena, such as latent heat and moisture transfer between a building surface and ambient air. In other words, the current TRNSYS cannot be used to estimate the effectiveness of evaporation during cooling, which is a typical passive design method. Hence, the authors developed a MATLAB/TRNSYS integration scheme, in which TRNSYS was modified to model simultaneous heat and moisture transfer from the wet roof surface of a building. This scheme enabled TRNSYS to calculate the rate of evaporative heat and moisture transfer dynamically from the roof surface, assuming a control volume approximation of the roof surface. Finally, the effect of evaporative cooling on the thermal performance of an Indian building was estimated using the modified model.

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Tairab, Ala Eldin Mohamed. "Performance Analysis of Borehole U-tube Heat Exchanger Based on TRNSYS Software." Indian Journal of Science and Technology 13, no. 5 (2020): 539–51. http://dx.doi.org/10.17485/ijst/2020/v13i05/148618.

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Caciula, Bogdan, Tanase Panait, and Viorel Popa. "Theoretical and Experimental Research Regarding Operating Conditions of the Refrigeration Absorption/Adsorption Machines Using Solar Energy." Applied Mechanics and Materials 659 (October 2014): 325–30. http://dx.doi.org/10.4028/www.scientific.net/amm.659.325.

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In this article is presents a short analyze of a solar cooling systems using absorption and adsorption chillers. We try to pick the optimum dimension for the principal equipment of a cooling system for a holiday house place in Mediterranean climate using TRNSYS software.

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Ferroukhi, Mohammed, Rafik Belarbi, Karim Limam, and Walter Bosschaerts. "Impact of coupled heat and moisture transfer effects on buildings energy consuption." Thermal Science 21, no. 3 (2017): 1359–68. http://dx.doi.org/10.2298/tsci150608215f.

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Coupled heat, air, and moisture transfers through building envelope have an important effect on prediction of building energy requirements. Several works were conducted in order to integrate hygrothermal transfers in dynamic buildings simulations codes. However, the incorporation of multidirectional hygrothermal transfer analysis in the envelope into building simulation tools is rarely considered. In this work, coupled heat, air, and moisture (HAM) transfer model in multilayer walls was established. Thereafter, the HAM model is coupled dynamically to a building behavior code (BES).The coupling concerns a co-simulation between COMSOL Multiphysics and TRNSYS software. Afterward, the HAM-BES co-simulation accuracy was verified. Then, HAM-BES co-simulation platform was applied to a case study with various types of climates (temperate, hot and humid, cold and humid). Three simulations cases were carried out. The first simulation case consists of the TRNSYS model without HAM transfer model. The second simulation case, 1-D HAM model for the envelope was integrated in TRNSYS code. For the third one, 1-D HAM model for the wall and 2-D HAM model for thermal bridges were coupled to the thermal building model of TRNSYS. Analysis of the results confirms the significant impact of 2-D envelope hygrothermal transfers on the indoor thermal and moisture behavior of building as well as on the energy building assessment. These conclusions are shown for different studied climates.

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Januševičius, Karolis, and Giedrė Streckienė. "Analysis of air-to-water heat pump in cold climate: comparison between experiment and simulation." Mokslas - Lietuvos ateitis 7, no. 4 (2015): 468–74. http://dx.doi.org/10.3846/mla.2015.823.

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Heat pump systems are promising technologies for current and future buildings and this research presents the performance of air source heat pump (ASHP) system. The system was monitored, analysed and simulated using TRNSYS software. The experimental data were used to calibrate the simulation model of ASHP. The specific climate conditions are evaluated in the model. It was noticed for the heating mode that the coefficient of performance (COP) varied from 1.98 to 3.05 as the outdoor temperature changed from –7.0 ºC to +5.0 ºC, respectively. TRNSYS simulations were also performed to predict seasonal performance factor of the ASHP for Vilnius city. It was identified that seasonal performance prediction could be approximately 15% lower if frost formation effects are not included to air-water heat pump simulation model.

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Mancic, Marko, Dragoljub Zivkovic, Milan Djordjevic, Milena Jovanovic, Milena Rajic, and Dejan Mitrovic. "Techno-economic optimization of configuration and capacity of a polygeneration system for the energy demands of a public swimming pool building." Thermal Science 22, Suppl. 5 (2018): 1535–49. http://dx.doi.org/10.2298/tsci18s5535m.

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A polygeneration system is an energy system capable of providing multiple energy outputs to meet local demands, by application of high process integration. In this paper, optimal configuration and capacity of a polygeneration system for an indoor swimming pool building is determined by application of a method based on TRNSYS simulation and GenOpt optimization software. Based on the applicability, a superstructure of the polygeneration system is integrated, consisting of the following polygeneration modules: an internal combustion engine cogeneration module, a vapor compression chiller, and adsorption chiller, a ground source heat pump, flat plate solar thermal collectors, photovoltaic collectors, and heat storage. Annual behavior of energy loads of the public swimming pool building during a typical meteorological year and the polygeneration system are modeled and simulated using TRNSYS software, whereas techno-economic optimization is performed by GenOpt optimization. The results indicated the optimal con-figuration of the polygeneration system for the modelled energy demands, as well as the optimal capacity of the polygeneration modules, thus defining the optimal capacity of the polygeneration system for the energy demands of the public swimming pool building.

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Buonomo, Bernardo, Furio Cascetta, Luca Cirillo, and Sergio Nardini. "Application of nanofluids in solar cooling system: Dynamic simulation by means of TRNSYS software." Modelling, Measurement and Control B 87, no. 3 (2018): 143–50. http://dx.doi.org/10.18280/mmc_b.870305.

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Orgeira-Crespo, Pedro, Carlos Ulloa, José M. Núñez, and José A. Pérez. "Development of a Transient Model of a Lightweight, Portable and Flexible Air-Based PV-T Module for UAV Shelter Hangars." Energies 13, no. 11 (2020): 2889. http://dx.doi.org/10.3390/en13112889.

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This research paper introduces a mathematical model to predict the performance of photovoltaic–thermal systems (PV-T), based on a thin layer flexible panel and an air pipe, by using the Trnsys® software tool to simulate energetic systems. The main advantage of these types of panels is their easy portability, making them ideal to address thermal needs in several scenarios. In the military field, there is an important concern about the use of sustainable energy; for instance, cooling facilities for infantry tents used in their deployments. In this research, a PV-T panel to cover electrical power needs for an infantry’s hangar unmanned air vehicle (UAV) is introduced. The proposed thermal model, based on the novelty of inertial mass (lump) as an approach to real panel behavior, has been validated through the comparison between Trnsys’ model simulation data, a real weather station, and data obtained in a test bed. Genopt’s simulation software is used to fit the model, allowing for the prediction of heat transmission coefficient values. The good match between simulated and experimental data makes the proposed model suitable for the photovoltaic–thermal prediction of panel behavior.

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Šteffek, Libor, Petr Jelínek, Jiří Kalánek, and Milan Ostrý. "The Impact of the Choice of Computational Methods on the Results of Simulations of Specific Heat Consumption for Heating a Family House." Advanced Materials Research 899 (February 2014): 161–65. http://dx.doi.org/10.4028/www.scientific.net/amr.899.161.

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There are almost 100 passive houses registered in the Czech Republic, whose design was influenced by simulations coming from various design software from early stages with maximization of energy savings in mind. The accuracy of the simulations however, depends on the level of simplification and accuracy of inputs, such as climatic data, etc. Especially the energy simulations require databases with hourly or monthly climatic data. The questions are, whether these are corresponding with reality and to what extend the difference between the database data and reality will affect the simulations and subsequently the use of the houses.This paper deals with modelling of and energy-efficient house under several sets of climatic data. The analysis was done in monthly steps using Energie 2013 (methodology of ČSN EN ISO 13790:2009) and PHPP 2007 software tools and in hourly steps on the basis of reference data of a climatic year described in ČSN EN ISO 15927-4:2011 (TRNSYS) and from the database of Meteonorm (TRNSYS). The aim of this paper is to point out the differences in the determination of heat consumption using different calculation methods..

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Lamrani, Bilal, Ahmed Khouya, and Abdeslam Draoui. "Energy and environmental analysis of an indirect hybrid solar dryer of wood using TRNSYS software." Solar Energy 183 (May 2019): 132–45. http://dx.doi.org/10.1016/j.solener.2019.03.014.

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Chargui, R., and H. Sammouda. "Modeling of a residential house coupled with a dual source heat pump using TRNSYS software." Energy Conversion and Management 81 (May 2014): 384–99. http://dx.doi.org/10.1016/j.enconman.2014.02.040.

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Gargab, Fatima Zohra, Amine Allouhi, Tarik Kousksou, Haytham El-Houari, Abdelmajid Jamil, and Ali Benbassou. "Energy Efficiency for Social Buildings in Morocco, Comparative (2E) Study: Active VS. Passive Solutions Via TRNsys." Inventions 6, no. 1 (2020): 4. http://dx.doi.org/10.3390/inventions6010004.

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This paper aims to highlight the potential of solar water heater installations in Morocco. The project involves the comparison of active and passive solutions for energy efficiency in buildings. To this end, a numerical simulation model of solar water heater installations is created under TRNsys. Three hot water demand scenarios (Low, Standard, and High) were taken into account for the six climatic zones defined in the Moroccan thermal regulation of constructions. The same software (TRNsys) is used to model a pilot building consisting of 16 flats. Energy efficiency actions have been applied to the building envelope (insulation and glazing) and simulations are made for the six areas. The simulation results comparing energy and financial savings show the influence of subsidized gas prices on solar water heaters’ relevance despite significant energy savings. This work proves that solar water heaters will be a primary obligation for Morocco, taking into account changes in butane gas prices.

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Cardona Gil, Jorge, Jorge Humberto Gallego Orrego, César Alejandro Isaza Roldán, Renato Torres Salazar, and Daniel A. López Chejne. "Integración de tecnologías energéticamente eficientes en sistemas de climatización operados con energía térmica." Revista CINTEX 22, no. 1 (2017): 83–96. http://dx.doi.org/10.33131/24222208.289.

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Con el artículo se pretende mostrar el desarrollo de un proyecto demostrativo y educativo de un sistema de climatización operado con energía solar, en el cual se usan tecnologías complementarias energéticamente eficientes que potencien su desempeño dentro del bloque de registro de la Universidad Pontificia Bolivariana (UPB), así mismo potenciar la investigación, desarrollo e inversión para conseguir una alta penetración de tecnologías de climatización eficiente y limpia. El desarrollo se ha dividido en 4 grandes fases, que inician con la simulación del sistema de refrigeración, en el cual se ha utilizado el software TRNSYS®; dimensionamiento y diseño básico del sistema de refrigeración; búsqueda y selección de equipos p.e. bombas; máquina de absorción, colectores solares, entre otros; diseño de detalle de un sistema de climatización con energía solar térmica, en el cual se hace uso de un equipo de enfriamiento de agua por absorción, paneles radiantes y enfriador evaporativo indirecto. Entre los resultados obtenidos se encuentra el dimensionamiento y diseño detallado del sistema y la adquisición del equipo de absorción y enfriamiento evaporativo soportados en un diseño simulado al emplear los softwares TRNSYS® y MATLAB®. Lo anterior permitió determinar los niveles de carga adecuados para cada uno de los equipos involucrados en el sistema, además de asegurar los parámetros de calidad de potencia para atender los requerimientos de energía eléctrica y aire acondicionado.

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Laxmi, Kornu, and Vaddivenkatasundara Rao. "Estimation of Cooling Load of a Residential House using TRNSYS." Applied Research Journal of Science and Technology 2, no. 1 (2020): 1–24. http://dx.doi.org/10.47721/arjst202001016.

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Development of a country will lead to increased utilization and demand for energy. In this research study, transient simulation technique is implemented and eventually, the cooling load of the house is determined. The study focused to provide cooling load characteristics for a residential house. The factors namely: size and shape, thermophysical properties, window systems, orientation, internal gains, ventilation and infiltration aspects that influence the cooling load are considered in the study. A dynamic simulation software-TRNSYS (Transient Systems Simulation Program) is used for the modelling and simulation of the energy flows of the house to determine the cooling thermal load. The study is useful in providing a better solution for a sustainable future by simulating with different design modifications of the house. This study may be extended to focus on the choice of constructional materials, so that good temperature and lower cooling load are attained. A case study of a residential building is situated in the coastal district of Andhra Pradesh, India and located at Latitude (17.68o N) and longitude (83.21oE) is considered to find cooling load through TRNSYS 16. Keywords: Cooling load, Tropical region, Simulation, ventilation

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Šikula, O., O. Ladjedel, P. Charvát, L. Adjlout, and S. A. Reffas. "Influence of heating elements dynamics on energy savings." International Review of Applied Sciences and Engineering 9, no. 2 (2018): 169–73. http://dx.doi.org/10.1556/1848.2018.9.2.13.

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Dynamic heating computer simulations of one model typical living room heated alternatively by two types of heating bodies are presented in this paper. This contribution describes a numerical model of two heating elements (plate radiator and a new type of convector) showing different thermal inertia by using the TRNSYS software. The results show energy savings approximately of 10% for the new tested convector, where the thermal comfort is better in terms of reaching the required room temperature.

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Gamil, Ahmed, Syed Ihtsham Ul Haq Gilani, and Hussain Hamoud Al-Kayiem. "Design and Simulation of Small Heliostat Field at Universiti Teknologi PETRONAS Campus." Applied Mechanics and Materials 699 (November 2014): 613–18. http://dx.doi.org/10.4028/www.scientific.net/amm.699.613.

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Solar Power Tower systems have attracted the worldwide interest since the early 1980s and heliostat fields have been an area for development due to their high cost and important function. This paper presents a mathematical model to design a small heliostat field with 3 dual-axis heliostat units located in Universiti Teknologi PETRONAS, Malaysia. The model mainly relies on the sun position and tower and heliostat geometrical relations, namely, tower height and the ground distance of the concerned heliostats. The heliostat field layout is configured according to radial staggered pattern then varying the tower height and heliostat ground distance to calculate the facing and target angle of each heliostat. TRNSYS software was used to simulate the power output for the proposed heliostat field. The modeled heliostat field could deliver 10 kW for 12.4 m2reflective area for latitude 4.3̊ N. A solar power tower testing facility will be built according to the design specifications produced in this paper and TRNSYS simulation results are required to estimate the power input to the receiver system for sizing purpose in the future.

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Šiupšinskas, Giedrius, and Solveiga Adomėnaitė. "MULTI-CRITERIA ANALYSIS OF ALTERNATIVE ENERGY SUPPLY SOLUTIONS TO PUBLIC NEARLY ZERO ENERGY BUILDINGS / BEVEIK NULINIO ENERGIJOS BALANSO VISUOMENINIŲ PASTATŲ APRŪPINIMO ENERGIJA SPRENDIMAI, DAUGIAKRITERĖ ANALIZĖ." Mokslas - Lietuvos ateitis 5, no. 4 (2013): 435–41. http://dx.doi.org/10.3846/mla.2013.68.

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The article analyzes energy supply alternatives for modernised public nearly zero energy buildings. The paper examines alternative energy production systems such as heat pumps (air-water and ground-water), solar collectors, adsorption cooling, biomass boiler, solar photovoltaic, wind turbines and combinations of these systems. The simulation of the analysed building energy demand for different energy production alternatives has been performed using TRNSYS modelling software. In order to determine an optimal energy supply variant, the estimated results of energy, environmental, and economic evaluation have been converted into non-dimensional variables (3E) using multi-criteria analysis. Article in Lithuanian. Santrauka Siekiant beveik nulinio energijos balanso modernizuotame viešosios paskirties pastate, nagrinėjamos aprūpinimo energija alternatyvos. Tiriamos šios alternatyvios aprūpinimo energija sistemos: šilumos siurbliai (gruntas–vanduo ir oras– vanduo), saulės kolektoriai, adsorbcinė vėsinimo mašina, biokuro katilas, saulės elementai, vėjo jėgainė – ir šių sistemų deriniai. Skirtingų aprūpinimo energija variantų energijos poreikiai modeliuojami TRNSYS (The Transient System Simulation Program) modeliavimo programa. Siekiant nustatyti optimalų aprūpinimo energija variantą, gauti energinio, ekologinio ir ekonominio vertinimų rezultatai daugiakriterės analizės būdu perskaičiuojami į nedimensinius rodiklius (3E).

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Dols, W. Stuart, Steven J. Emmerich, and Brian J. Polidoro. "Using coupled energy, airflow and indoor air quality software (TRNSYS/CONTAM) to evaluate building ventilation strategies." Building Services Engineering Research and Technology 37, no. 2 (2015): 163–75. http://dx.doi.org/10.1177/0143624415619464.

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Al-Odat, Mohammed, Khalida Rawashedsh, and Mohammed Al-Hasan. "Performance Investigation of Flat Plate and Evacuated Tube Collectors under Jordan Climate Conditions Using TRNSYS Software." Mathematical Modelling of Engineering Problems 8, no. 1 (2021): 142–48. http://dx.doi.org/10.18280/mmep.080118.

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The performance of the Flat Plate Collector (FPC) and Evacuated Tube Collector (ETC) for domestic hot water applications under Jordan climate conditions was theoretically investigated using TRNSYS software. The presented simulation model can provide a long-term evaluation of system performance at different weather conditions. This simulation was carried out during 24 hours in 21 June, is considered as a hot climate and 21 January is considered as a cold climate; under the meteorological conditions of both Irbid and Aqaba cities in Jordan. The inlet water temperature of the first collector, collector area, water flow rate and tilt angle were considered 15℃, 2.04 m2, 0.0139 kg/s and 45 degrees respectively. The outlet temperature of each collector was considered as the inlet of the previous collector. Three collectors in series were applied to increase the output temperature up to 90-100℃. The results showed that TE increased with the decrease in the inlet temperature, which means the useful energy gain (Qu) of the first collector is greater than the 2nd and the 3rdcollector. The useful energy gain (Qu) of ETC is greater than of FPC, and the useful energy gain (Qu) of cold climate is less than hot climate. The output temperature of ETCs is greater than that of FPCs for Irbid city in cold and hot climate. Furthermore, for Aqaba in cold climate and in hot climate the outlet temperature of ETCs is higher than FPCs. Additionally, the daily thermal performance of the ETCs is significantly better than the FPCs in cold climate. Meanwhile, thermal performance of both collectors are close in a hot climate.

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Mezouari, Meriem, Naima Fezzioui, Mohamed El-mir, and Roulet Claude-Alain. "Potential of Natural Ventilation in Different Algerian Climates." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 77, no. 2 (2020): 176–92. http://dx.doi.org/10.37934/arfmts.77.2.176192.

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This study tested the effectiveness of some natural ventilation basic configurations for the thermal comfort of occupants in different local climates in Algeria. Due to the diverse Algerian climate, the study was performed during the mid-season period that includes three months of May, September, and October and the summer that includes the months of June, July, and August. The ventilation potential of the selected configurations was analysed through numerical simulation by using TRNSYS software coupled with COMIS aeraulic software. The results showed the significant contribution of natural chimney ventilation caused by a stairwell to improve occupant comfort. However; its integration requires a judicious and permanent inspection to control temperature decreases or overheating risks.

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Brumana, Giovanni, Giuseppe Franchini, Elisa Ghirardi, and Antonio Perdichizzi. "Analysis of Solar District Cooling systems: the Effect of Heat Rejection." E3S Web of Conferences 197 (2020): 08018. http://dx.doi.org/10.1051/e3sconf/202019708018.

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The paper presents the performance assessment of a solar district cooling system with special attention to the heat rejection process. The investigation includes energetic, economic and environmental aspects. The district cooling network is driven by two-stage Li-Br absorption chillers coupled with parabolic trough solar collectors. The whole system, including solar field, storage tanks and chilled water pipeline, has been modelled in Trnsys. The focus is on the heat rejection systems, and their impact on the performance of the cooling plant. Four different types of heat rejection systems are considered: Air Cooling (AC), Evaporative Cooling Tower (ECT), Groundwater Heat Exchanger (GHE) and Geothermal Boreholes (GB). The paper presents two case studies in the Gulf region: the warm climate is compared for two condition of humidity, dry (Riyadh) and humid (Abu Dhabi). Furthermore, the work presents a multivariable optimization procedure based on GenOpt software interacting with Trnsys model under the constraint of a 70% annual solar fraction. The best option resulted to be the one based on absorption chillers coupled with Groundwater Heat Exchanger in both locations. The annual power consumption is reduced by 83% in Abu Dhabi and 82% in Riyadh compared to conventional cooling systems.

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Hudișteanu, S. V., C. G. Popovici, M. Verdeș, V. Ciocan, and F. E. Țurcanu. "Case study on the efficiency improvement of photovoltaic panels by cooling." Technium: Romanian Journal of Applied Sciences and Technology 2, no. 1 (2020): 85–90. http://dx.doi.org/10.47577/technium.v2i1.46.

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The paper presents a numerical study of the operation of photovoltaic panels integrated in ventilated facades of the buildings. In these circumstances, the position of the panels is fixed all the time and the possibility of the raising of the conversion efficiency is analysed from the point of view of the operating temperature of the photovoltaic cells. The model and the functioning parameters are obtained using TRNSYS software. The solution proposed for cooling the panels consistsin using waterheat exchangers attached to the backside of the photovoltaic panel.

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Figaj, Rafał, Maciej Żołądek, and Wojciech Goryl. "Dynamic Simulation and Energy Economic Analysis of a Household Hybrid Ground-Solar-Wind System Using TRNSYS Software." Energies 13, no. 14 (2020): 3523. http://dx.doi.org/10.3390/en13143523.

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The adoption of micro-scale renewable energy systems in the residential sector has started to be increasingly diffused in recent years. Among the possible systems, ground heat exchangers coupled with reversible heat pumps are an interesting solution for providing space heating and cooling to households. In this context, a possible hybridization of this technology with other renewable sources may lead to significant benefits in terms of energy performance and reduction of the dependency on conventional energy sources. However, the investigation of hybrid systems is not frequently addressed in the literature. The present paper presents a technical, energy, and economic analysis of a hybrid ground-solar-wind system, proving space heating/cooling, domestic hot water, and electrical energy for a household. The system includes vertical ground heat exchangers, a water–water reversible heat pump, photovoltaic/thermal collectors, and a wind turbine. The system with the building is modeled and dynamically simulated in the Transient System Simulation (TRNSYS) software. Daily dynamic operation of the system and the monthly and yearly results are analyzed. In addition, a parametric analysis is performed varying the solar field area and wind turbine power. The yearly results point out that the hybrid system, compared to a conventional system with natural gas boiler and electrical chiller, allows one to reduce the consumption of primary energy of 66.6%, and the production of electrical energy matches 68.6% of the user demand on a yearly basis. On the other hand, the economic results show that that system is not competitive with the conventional solution, because the simple pay back period is 21.6 years, due to the cost of the system components.

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Vyhlídalová, Karolína, and Petr Horák. "Modelling of a Small Solar Collector Array and Comparison with Meteorological Data Using TRNSYS Energy Simulation Software." Advanced Materials Research 1041 (October 2014): 109–12. http://dx.doi.org/10.4028/www.scientific.net/amr.1041.109.

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This article deals with the modelling of a small domestic solar collector array using Transient System Simulation Tool. The model was developed using meteorological data included as part of the Transient System Simulation Tool , mean regional data and actual meteorological data collected near the site of the solar array during testing. The main aim of this study was to compare the results of model simulations using the different types of meteorological data. The most accurate simulation was that prepared using meteorological data collected near the site of the solar array. Even here, however, differences were observed due to the equipment used to monitor heat gain, that is earlier insolation of the meteorological station.

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Juliadi, Denda Afri, Remon Lapisa, Purwantono Purwantono, and Hendri Nurdin. "Numerical Analysis Effect of Home Roof Design Towards Thermal Comfort of Occupants." MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering 2, no. 2 (2020): 9–18. http://dx.doi.org/10.46574/motivection.v2i2.54.

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The cool room temperature is a requirement in the thermal comfort of a building. In earthquake prone areas, building structures should be designed with minimal material weight. Therefore, it is necessary to be aware of an alternative solution to ensure the room's thermal comfort with minimal weight. This research aims to analyze the influence of roof slope 15O, 20O, 25O, 30O, 35O, 40O, and 45O on the comfort of the room and the strength of the building in the house measuring 6 meters x 8 meters x 3 meters. Analysis is done with three software that is SketchUp as a design, CONTAM to analyze air pressure and TRNSYS to simulate all the data that has been created in SketchUp and CONTAM. Obtained the lowest temperature at a roof slope of 45O and the lowest weight is the roof with a 15O slope. Temperatur ruangan yang sejuk merupakan syarat dalam kenyamanan termal sebuah bangunan. Di kawasan rawan gempa, struktur bangunan harus dirancang dengan bobot material yang minimal. Oleh karena itu, perlu dicarikan solusi alternatif untuk menjamin kenyaman termal ruangan dengan bobot yang minimal. Penelitian ini bertujuan menganalisa pengaruh kemiringan atap 15o, 20o, 25o, 30o, 35o, 40o, dan 45o terhadap kenyamanan ruangan serta kekuatan bangunan pada rumah berukuran 6 meter x 8 meter x 3 meter. Analisa dilakukan dengan tiga software yaitu SketchUp sebagai perancangan, CONTAM untuk menganalisa tekanan udara serta TRNSYS untuk menyimulasikan semua data yang telah di buat pada SketchUp dan CONTAM. Didapatkan hasil suhu terendah berada pada kemiringan atap 45 o dan bobot terendah adalah atap dengan kemiringan 15o.

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Šikula, Ondřej, Pavel Charvát, Lahouari Adjlout, and Omar Ladjedel. "Modeling of Radiators with Mass Flow Control." Applied Mechanics and Materials 887 (January 2019): 667–75. http://dx.doi.org/10.4028/www.scientific.net/amm.887.667.

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The topic of the contribution can be included in computer modeling of the thermal behavior of radiators for heating of buildings. Control of heaters leads to dynamic phenomena affecting the final thermal state of the heated room and heating energy consumption. The paper focuses on modeling of radiator quantitative control method using thermostatic valve. The objective of the paper is to show a quality of controlling and to compare an energy consumption when various thermostatic radiator valves time delay are set. The models of control, radiator, and a room are implemented in software TRNSYS. The results show significant differences in energy consumption.

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Mohammadi, Saleh, Esmail Khalife, Mohammad Kaveh, et al. "Comparison of Optimized and Conventional Models of Passive Solar Greenhouse—Case Study: The Indoor Air Temperature, Irradiation, and Energy Demand." Energies 14, no. 17 (2021): 5369. http://dx.doi.org/10.3390/en14175369.

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This study was carried out to optimize a computational model of a new underground passive solar greenhouse to improve thermal performance, storage, and saving of heat solar energy. Optimized and conventional passive solar greenhouse were compared in regards of indoor air temperature, irradiation, and energy demand. Six different materials were used in the conventional model. In addition, TRNSYS software was employed to determine heat demand and irradiation in the greenhouse. The results showed that the annual total heating requirement in the optimized model was 30% lower than a conventional passive solar system. In addition, the resulting average air temperature in the optimized model ranged from −4 to 33.1 °C in the four days of cloud, snow, and sun. The average air temperature in the conventional passive solar greenhouse ranged from −8.4 to 24.7 °C. The maximum monthly heating requirement was 796 MJ/m2 for the Wtype87 model (100-mm lightweight concrete block) and the minimum value was 190 MJ/m2 for the Wtype45 model (50-mm insulation with 200-mm clay tile) in a conventional passive solar greenhouse while the monthly heating requirement estimated 126 MJ/m2 for the optimized greenhouse model. The predictability of the TRNSYS model was calculated with a coefficient of determination (R2) of 95.95%.

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Mohd Afzanizam Mohd Rosli et al.,, Mohd Afzanizam Mohd Rosli et al ,. "A Simulation Study of Domestic Hot Water for Flat Plate Solar Collector Using Transient System Simulation Software (TRNSYS)." International Journal of Mechanical and Production Engineering Research and Development 10, no. 3 (2020): 13381–92. http://dx.doi.org/10.24247/ijmperdjun20201275.

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Assadi, Morteza Khalaji, and Ali Mohammadi. "Simulation of Dynamical Performance of Solar Desiccant Cooling Cycle." Applied Mechanics and Materials 819 (January 2016): 160–70. http://dx.doi.org/10.4028/www.scientific.net/amm.819.160.

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In this research, solar desiccant cooling cycles in ventilation and hybrid mode are simulated. To simulate cycles, at first a model for desiccant wheel simulation is presented and a computer code based on experimental correlations is used to solve equations. Then by TRNSYS software a model for solar hot water system is simulated, and eventually by representing a suitable algorithm, computer program for simulating solar desiccant cooling cycles by EES software is developed. For all components of desiccant cycle, the dynamic optimum were based on regeneration temperature and solar fraction, and after optimum, dynamic cycle performance in an office building with an area of 115 m2 located in Bushehr city, capacity of cooling 3 ton refrigeration were analyzed. The results show that solar desiccant cooling cycles in comparison with compression refrigeration cycles with 40% saving in energy consumption and also during the day and in office buildings have a better performance.

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Yu, Kezhi, Zhaoyang Cao, and Yanling Liu. "Research on the optimization control of the central air-conditioning system in university classroom buildings based on TRNSYS software." Procedia Engineering 205 (2017): 1564–69. http://dx.doi.org/10.1016/j.proeng.2017.10.261.

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Gorni, Domenico, and Antonio Visioli. "Genetic Algorithms Based Reference Signal Determination for Temperature Control of Residential Buildings." Applied Sciences 8, no. 11 (2018): 2129. http://dx.doi.org/10.3390/app8112129.

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This paper deals with the use of genetic algorithms for the determination of the optimal set-point signals for the control of the temperature in a residential building for which the use of the rooms, that is, the user requirements, are different throughout the day. In particular, the optimization procedure aims at minimizing the overall energy consumption by satisfying, at the same time, the comfort constraints set by the user. Both the case of radiators and fan-coil units are considered. The presence of unoccupied rooms is also addressed. Finally, a comparison between this approach and a Model Predictive Control based one is presented. Simulation results obtained by using TRNSYS software tool demonstrate the effectiveness of the method.

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Al-Hyari, Laith, and Miklos Kassai. "Development and Experimental Validation of TRNSYS Simulation Model for Heat Wheel Operated in Air Handling Unit." Energies 13, no. 18 (2020): 4957. http://dx.doi.org/10.3390/en13184957.

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Reducing energy usage to save the environment is one of the main goals for the future. The energy losses in ventilation have a huge impact on energy consumption in buildings. In this work, the energy performance of a heat recovery wheel system equipped in an air handling unit was tested year-round, and the results compared with the simulation output for the system using TRNSYS software. The selected conditioned space was the staff offices of an H&M fashion shop, located in Eger, Hungary. Temperature, relative humidity, and air velocity sensors were placed at the wheel inlet and outlet sections to record data and determine the annual energy saving. The results revealed a good agreement between the measured and simulated results.

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Murshed, Syed Monjur, Solène Picard, and Andreas Koch. "Modelling, Validation and Quantification of Climate and Other Sensitivities of Building Energy Model on 3D City Models." ISPRS International Journal of Geo-Information 7, no. 11 (2018): 447. http://dx.doi.org/10.3390/ijgi7110447.

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New planning tools are required to depict the complete building stock in a city and investigate detailed measures on reaching local and global targets to improve energy efficiency and reduce greenhouse gas emissions. To pursue this objective, ISO (the International Organization for Standardization) 13790:2008 monthly heating and cooling energy calculation method is implemented using geometric information from 3D city models (e.g., CityGML format) in an open source software architecture. A model is developed and applied in several urban districts with different number of 3D buildings in various cities. The model is validated with the simulation software TRNSYS. We also perform a sensitivity analysis to quantify the impact of climate change and other physical and behavioral factors on modelling results. The proposed approach can help to perform city or district-wide analysis of the building energy needs and prepare different renovation plans to support decision-making, which finally will enhance the livability of a city and the quality of life of the citizens.

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Altoé, Leandra, Delly Oliveira Filho, Joyce C. Carlo, and Paulo Marcos de B. Monteiro. "Computer tools applied to analysis of solar water heaters." Engenharia Agrícola 33, no. 5 (2013): 1072–78. http://dx.doi.org/10.1590/s0100-69162013000500018.

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The simulation programs are important tools to analyze the different energetic alternatives, including the use of renewable energy. The objective of this study was to analyze comparatively the different computer tools available for modeling of solar water heaters. Among the main simulation software of solar thermal systems, there are: RETScreen International, EnergyPlus, TRNSYS, SolDesigner, SolarPro, e T*SOL. Among the tools mentioned, only EnergyPlus and RETScreen International are free, but they allow obtaining interesting results when applied together. The first one has a detailed module of energy analysis of solar water heaters, while the second one provides an detailed economic feasibility study and an assessment of emissions of greenhouse gases. RETScreen International and EnergyPlus programs are aimed at a diverse audience, including designers, researchers and energy planners.

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Carlini, Maurizio, and Sonia Castellucci. "Modelling and Simulation for Energy Production Parametric Dependence in Greenhouses." Mathematical Problems in Engineering 2010 (2010): 1–28. http://dx.doi.org/10.1155/2010/590943.

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Greenhouses crops in Italy are made by using prefabricated structures, leaving out the preliminary study of optical and thermal exchanges between the external environment and the greenhouse, dealing with heating and cooling and the effects of air conditioning needed for plant growth. This involves rather significant costs that directs the interest of designers, builders, and farmers in order to seek constructive solutions to optimize the system of such emissions. This work was done by building a model of gases using TRNSYS software, and these gases then have been checked for compliance. The model was constructed considering an example of a prefabricated greenhouse, located in central of Italy. Aspects of the structural components, and thermal and optical properties are analyzed in order to achieve a representation of reality.

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Kuś, Jakub, Kyrylo Rudykh, Marcin Kobas, et al. "Solar-driven Refrigerator for off-grid Regions." E3S Web of Conferences 103 (2019): 01001. http://dx.doi.org/10.1051/e3sconf/201910301001.

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Refrigeration systems are necessary for people living in hot climates. A majority of tropical and subtropical countries uses electrical power as a source of cooling. During the seasons of high ambient temperature there is a significant cooling load due to increased level of energy consumption. Cooling systems are therefore necessary in African countries in order to keep medications and food in safe conditions. Furthermore, there is a power shortage crisis due to the high demand for cooling. TRNSYS software allows to simulate a complete solar-powered absorption cooling system. A model used in an experiment includes PV modules making it advantageous over a conventional cooling system. PV modules of assumed area are sufficient to maintain the temperature inside cooling device below 6°C over the whole year.

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Franco Gutiérrez, Daniel David, and César Alejandro Isaza Roldán. "Metodología Rápida para la Modelación de Chillers de Absorción Uniefecto en el Entorno de Simulación de TRNSYS." AVANCES: Investigación en Ingeniería 15, no. 1 (2018): 302–17. http://dx.doi.org/10.18041/1794-4953/avances.1.4741.

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El crecimiento económico incrementa las necesidades de aire acondicionado y refrigeración. Por tal, eficiencia energética en edificios, así como los recursos energéticos distribuidos son temas de alto interés. Los chillers de absorción impulsan procesos de enfriamiento, a partir de fuentes de calor tales como distritos térmicos, cogeneración, energía termosolar o calor industrial residual, con menores emisiones de CO2. Loschillers de absorción son máquinas térmicas no sencillas, lo que dificulta la evaluación del desempeño y requiere el uso de herramientas computacionales para simular su comportamiento. El presente trabajo ofrece resultados de una metodología propuesta, la cual a partir de las curvas de capacidad de enfriamiento dadas por los fabricantes y las ecuaciones básicas que modelan a un chiller de absorción, se obtiene al archivo de datos que el software TRNSYS requiere para simularlo.

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Mancic, Marko, Dragoljub Zivkovic, Milan Djordjevic, and Milena Rajic. "Optimization of a polygeneration system for energy demands of a livestock farm." Thermal Science 20, suppl. 5 (2016): 1285–300. http://dx.doi.org/10.2298/tsci16s5285m.

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A polygeneration system is an energy system capable of providing multiple utility outputs to meet local demands by application of process integration. This paper addresses the problem of pinpointing the optimal polygeneration energy supply system for the local energy demands of a livestock farm in terms of optimal system configuration and optimal system capacity. The optimization problem is presented and solved for a case study of a pig farm in the paper. Energy demands of the farm, as well as the super-structure of the polygeneration system were modelled using TRNSYS software. Based on the locally available resources, the following polygeneration modules were chosen for the case study analysis: a biogas fired internal combustion engine co-generation module, a gas boiler, a chiller, a ground water source heat pump, solar thermal collectors, photovoltaic collectors, and heat and cold storage. Capacities of the polygeneration modules were used as optimization variables for the TRNSYS-GenOpt optimization, whereas net present value, system primary energy consumption, and CO2 emissions were used as goal functions for optimization. A hybrid system composed of biogas fired internal combustion engine based co-generation system, adsorption chiller solar thermal and photovoltaic collectors, and heat storage is found to be the best option. Optimal heating capacity of the biogas co-generation and adsorption units was found equal to the design loads, whereas the optimal surface of the solar thermal array is equal to the south office roof area, and the optimal surface of the PV array corresponds to the south facing animal housing building rooftop area.

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Plytaria, Maria, Christos Tzivanidis, Evangelos Bellos, Ioannis Alexopoulos, and Kimon Antonopoulos. "Thermal Behavior of a Building with Incorporated Phase Change Materials in the South and the North Wall." Computation 7, no. 1 (2018): 2. http://dx.doi.org/10.3390/computation7010002.

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Energy consumption in the building sector is responsible for a very large amount of electricity consumption worldwide. The reduction of this consumption is a crucial issue in order to achieve sustainability. The objective of this work is to investigate the use of phase change materials (PCMs) in the building walls in order to reduce the heating and the cooling loads. The novelty of this work is based on the investigation of different scenarios about the position of the PCM layer in the south and the north walls. PCMs can improve the thermal performance and the thermal comfort of a building due to their ability to store large amounts of thermal energy in latent form and so to reduce the temperature fluctuations of the structural components, keeping them within the desired temperature levels. More specifically, this work presents and compares the heating loads, the cooling loads and the temperature distribution of a building in Athens (Greece), with and without PCMs in different positions in the south wall and in the north walls. The simulation is performed with the commercial software TRNSYS 17, using the TRNSYS component: type 1270 (PCM Wall). The results proved that the maximum energy savings per year were achieved by the combination of the insulation and the PCM layer in the north and south walls. More specifically, the reductions in the heating and the cooling loads were found to be 1.54% and 5.90%, respectively. Furthermore, the temperature distribution with the use of a PCM layer is the most acceptable, especially during the summer period.

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Labastid, Dayberto, Marco Bolobosky, Luis Mogollón, and Arthur James. "Implementación de un Intercambiador de Calor en Techos de Zinc." KnE Engineering 3, no. 1 (2018): 747. http://dx.doi.org/10.18502/keg.v3i1.1478.

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The research aims to develop a compact prototype with low visual impact that is able to take advantage of solar energy to heat water collected from rain. The methodology used involves a study of the art of these systems, which was complemented by a research of related patents. The mathematical concepts governing heat transfer for these types of systems were analyzed and then simulated in Autodesk CFD. We also rely on the TRNSYS simulation software to estimate the temperature values that can reach Zinc roofs under tropical climatic conditions such as Panama. The system was built and tested, obtaining results such as reaching temperatures in the water very close to the surface temperatures of zinc. The decrease in the amount of heat entering the residence was also visualized.Keywords: heat exchanger, Solar Energy, Water Heater, Rainwater harvesting, Zinc Roof

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Rodríguez-Muñoz, Norma A., Mario Nájera-Trejo, Olivia Alarcón-Herrera, and Ignacio R. Martín-Domínguez. "A building’s thermal assessment using dynamic simulation." Indoor and Built Environment 27, no. 2 (2016): 173–83. http://dx.doi.org/10.1177/1420326x16668568.

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A thermal analysis of a two-storey building was made using a dynamic simulation software (TRNSYS). Thermal performance of a 2000 m2 building was examined by means of several dynamic simulations. The building is located in a region within the BS climate (steppe) according to the Köppen climate classification, where both air cooling and heating are needed to provide comfortable thermal conditions through the entire year. This weather often represents an energy saving challenge, where heat gains and heat losses need to be efficiently managed. A selection of common construction and glazing materials was implemented, and a simple but effective ventilating strategy was tested. Six thermal zones were defined in the building and a comfort temperature range was established as an operating parameter. The results show hourly mean temperatures and energy consumption due to air conditioning throughout a year.

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Dlimi, Maryam, Omar Iken, Rachid Agounoun, Amine Zoubir, and Khalid Sbai. "Experimental and numerical investigations on the thermal performance of hemp such a bio-sourced insulation material: application to a Moroccan Mediterranean climate." International Journal of Engineering & Technology 7, no. 1.8 (2018): 157. http://dx.doi.org/10.14419/ijet.v7i1.9090.

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Thermal performance of hemp concrete and hemp wool such as ecological insulation was evaluated for the city of Meknes in Morocco, in comparison with polystyrene which is an organic insulation material. The study was done in three sections. First, a thermo-physical properties characterization was done using the EI700 device. Then, the study was done on a concrete wall subjected to periodic outdoor conditions. The three insulation materials are used and the effects of thickness, location and partitioning on the time lag and decrement factor were investigated. Finally, heating and cooling loads of a whole building with the use of six different walls configurations are calculated using TRNSYS software. Throughout the whole study, results show that hemp wool presented the best thermal performance, and the evaluation of its use such us an insulation material in Morocco and especially in Meknes was investigated.

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