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Journal articles on the topic 'Heat pump unit'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Zhang, Hu, and Jinxu Lao. "Economic Analysis of Two Heat Pumps to Recover Heat from Circulating Water." E3S Web of Conferences 358 (2022): 01009. http://dx.doi.org/10.1051/e3sconf/202235801009.

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The use of heat pump to recover the condensing heat of the unit can realize the cascade utilization of energy, improve the utilization efficiency of energy, not only can effectively increase the heating capacity of the unit, but also can improve the use efficiency of heating extraction steam, so as to improve the economy of the thermal power plant. Heat pumps suitable for use in power plants can be divided into absorption heat pumps and compression heat pumps. Which type of heat pump is more economical needs specific judgment for the specific application environment. In this paper, a specific

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2

Frik, Anton, and Juozas Bielskus. "EXPERIMENTAL TEST STAND OF A HEAT PUMP INTEGRATED IN AIR HANDLING UNIT." Mokslas - Lietuvos ateitis 12 (September 22, 2020): 1–6. http://dx.doi.org/10.3846/mla.2020.13075.

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Heat pumps are becoming increasingly popular and are playing an important role in the heat and cooling supply chain of buildings sector. Although more than 160 years have passed since the manufacture of the first heat pump, this technology, designed to recover lowpotential heat energy and its useful use, can be called an innovative and efficient energy transformer. Airtowater and airtoair heat pumps are becoming more popular today due to their installation cost compared to groundtowater heat pumps. It has been noticed that recently airtoair heat pumps are more often installed in moder

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3

Plotnikova, L. V., I. I. Chilikova, S. Y. Sitnikov, V. E. Ukhlin, G. I. Efremov, and A. P. Kislov. "Computer model of the power system with inclusion of a heat pump in the process of separation." E3S Web of Conferences 124 (2019): 01032. http://dx.doi.org/10.1051/e3sconf/201912401032.

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The results of computer simulation of industrial processes of separation of substances with the inclusion of a heat pump are presented. Designs of heat pumps of closed type, open type, like “pipe in pipe” are considered. In the simulation software Aspen HYSYS, the adequacy of the computer model of the “rectification unit – closed type heat pump” system was checked. The results of computer simulation of the “rectification unit – open-type heat pump ’pipe in pipe’” system are presented. This system allows to increase the efficiency of the unit by 9% compared with the system of separation of subs

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4

Wang, Ze, Honghong Shen, Qunyin Gu, et al. "Economic Analysis of Heat Pump Recovery System for Circulating Water Waste Heat in Power Plant." E3S Web of Conferences 256 (2021): 02011. http://dx.doi.org/10.1051/e3sconf/202125602011.

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The use of heat pump technology to recover the waste heat of circulating water from the power plant instead of steam extraction for heating can not only improve the thermal efficiency of the unit and reduce the loss of cold source, but also has great advantages in energy saving. This paper uses absorption and compression heat pumps to recover the waste heat of circulating water in the power plant to study its energy-saving benefits. Under the same heating load, the economics of the two heat pumps are calculated and analyzed. The results show that the energy-saving benefits of absorption heat p

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5

Tijani, Alhassan Salami, Nazri Mohammed, and Werner Witt. "Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant." Scientific Research Journal 9, no. 2 (2012): 65. http://dx.doi.org/10.24191/srj.v9i2.5388.

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Industrial heat pumps are heat-recovery systems that allow the temperature ofwaste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses ofintegrating backpressure turbine ofa power plant with distillation u

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6

Tijani, Alhassan Salami, Nazri Mohammed, and Werner Witt. "Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant." Scientific Research Journal 9, no. 2 (2012): 65. http://dx.doi.org/10.24191/srj.v9i2.9409.

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Industrial heat pumps are heat-recovery systems that allow the temperature of waste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses of integrating backpressure turbine of a power plant with distillatio

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7

Wang, Qiang, Feng Zhen Liu, Li Jun Hou, and Jian Hua Gao. "Simulative Study on Solar-Assisted Air Source Heat Pump System." Advanced Materials Research 671-674 (March 2013): 2141–44. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.2141.

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A solar assisted air source heat pump unit is designed. The mathematical model of the unit is established and two hybrid operating conditions of the system are simulated. The simulative studying results shows that in winter the solar assisted air source heat pump unit can make full use of solar energy and the coefficient of performance (COP) of air source heat pump can be improved. In summer the cooling heat of air source heat pump could be recovered to improve the stability of solar hot water collector and the COP of the air source heat pump unit is greatly improved. The performance of solar

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8

Bai, Zhenpeng, and Yanfeng Li. "Performance of heat pump unit with capillary heat exchanger*." MATEC Web of Conferences 175 (2018): 02031. http://dx.doi.org/10.1051/matecconf/201817502031.

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The heat pump system utilizes shallow geothermal energy in the coastal areas, which not only uses clean energy but also contributes to energy conservation and environmental protection. This paper studies the performance of a heat pump system applied a capillary heat exchanger as an energy collection device. The numerical performance of capillary heat pump showed a good agreement with the experimental data in the winter heating mode and the summer cooling mode. It was concluded that the COP of the heat pump unit using the capillary heat exchanger was 5.32 in winter and 4.32 in summer.

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9

Zhang, Jian, Hui Yu Wang, and Jian Zhang. "Study on Principle and Application of Heat Pump Technology." Applied Mechanics and Materials 525 (February 2014): 607–10. http://dx.doi.org/10.4028/www.scientific.net/amm.525.607.

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This paper studies the low temperature heat source heat pumps to improve the efficiency of the heat pump unit with economic principles and the use of compressed improve the working conditions of the compressor, and to explore the system operating mode. A new test run integrated heat pump system is designed. Heat pump system can be controlled by the intelligent control of the implementing agencies, to improve the economic system, the research of this paper can provide a potential basis for the efficient use of energy heat pump.

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10

Snezhkin, Yu F., V. М. Paziuk, and Zh O. Petrova. "Heat pump technologies of low temperature drying of capillary-porous materials spherical shape." Кераміка: наука і життя, no. 3(48) (October 12, 2020): 7–12. http://dx.doi.org/10.26909/csl.3.2020.1.

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Heat pump technologies have become widely used in space heating and air conditioning systems, and the heat pump can be used for low-temperature drying of capillary-porous materials. Recuperative and condensing heat pumps, which allow both drying and cooling of the material, have become the most widespread. The developed condensing heat pump drying unit with a mine chamber implements a low-temperature drying process of spherical capillary-porous materials at a drying agent temperature of 40-50°C with a decrease in material humidity by 11% to a final humidity of 8%. Experimenta

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11

Boahen, Samuel, Kwesi Mensah, Yujin Nam, and Jong Min Choi. "Fault Detection Methodology for Secondary Fluid Flow Rate in a Heat Pump Unit." Energies 13, no. 11 (2020): 2974. http://dx.doi.org/10.3390/en13112974.

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Fault detection and diagnosis (FDD) has become an important subject in heat pumps due to its potential for energy savings. However, research on multiple faults occurring at the secondary fluid side of heat pumps is rare in the open literature. This study experimentally examined single secondary fluid flow rate faults (SSFF) and multiple-simultaneous secondary fluid flow rate faults (MSSFF) and their effects on the performance of a heat pump unit, which is a core component of ground source heat pump systems, and proposed FDD methodology to detect these faults. The secondary fluid flow rate faul

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12

Tan, Chao Yi, Peng Fei Yang, Meng Meng Wang, Hai Hua Hu, and Guo Qiang Zhang. "Efficiency Analysis of Series Connection Ground Source Heat Pump Water Chiller-Heater Unit." Applied Mechanics and Materials 529 (June 2014): 625–29. http://dx.doi.org/10.4028/www.scientific.net/amm.529.625.

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In order to improve EER of the ground source heat pump system and reduce heat transfer area of the ground heat exchanger, the authors had developed a series connection ground source heat pump water chiller-heater unit, after theoretical analyses, proved that placing the water chilled in front of the hot water unit could acquire a higher EER comparing to the opposite. In the meantime, this unit had a higher EER than a common water chiller-heater unit or a water chiller-heater unit with condensing heat recovery device. In an air conditioning system of ground source heat pump, employing the above

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13

Dong, Yangfang, Zhaotian Zeng, Hui Zhu, Yan Liu, and Miaomeng Liang. "Performance analysis of ground source heat pump system under low load rate." Thermal Science and Engineering 4, no. 2 (2021): 11. http://dx.doi.org/10.24294/tse.v4i2.1515.

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Taking a demonstration project of a ground source heat pump system under karst geological conditions in Guilin as the research object, based on the measured data under operating conditions in a typical season, and sorted according to the importance of influencing factors, this paper mainly studies the influence of system at very low load rate and unit load rate on the operation effect of ground source heat pump system. The research results show that the ground source heat pump system is in good operating condition when the system load rate is lower than 30.00% and the unit load rate is higher

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14

Frik, Anton, Juozas Bielskus, Rasa Džiugaitė-Tumėnienė, and Violeta Motuzienė. "Experimental Studies and Performance Characteristics Analysis of a Variable-Volume Heat Pump in a Ventilation System." Applied Sciences 14, no. 9 (2024): 3933. http://dx.doi.org/10.3390/app14093933.

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Air-to-air heat pumps are used in today’s ventilation systems increasingly often as they provide heating and cooling for buildings. The energy transformation modes of these units are subject to constant change due to the varying outdoor air state, including temperature and humidity. When choosing how to operate and control energy transformers, it is important to be able to adapt effectively to the changing outside air conditions. Nowadays, modern commercial heat pumps offer two levels of control flexibility: a compressor with a variable speed and an electronic expansion valve. This combination

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15

Il'ina, T., P. Orlov, N. Savvin, and Y. Elistratova. "THE ECONOMIC ASPECT OF THE SCALE-FORMING DIGNOSTICS LAYERS IN PLATE HEAT EXCHANGERS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 9, no. 4 (2024): 36–44. http://dx.doi.org/10.34031/2071-7318-2024-9-4-36-44.

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Heat pump installations and the possibility of their application in engineering systems are considered. This allows expanding significantly the possibilities of using renewable energy sources, as well as waste heat from various technological processes in engineering systems for creating a microclimate. Air heat pumps are the most promising, but their use in regions with a cold climate is limited due to condensation of moisture vapors on the cooling line of the evaporation unit with subsequent formation of ice, which reduces the efficiency of the installation. In this paper, an upgraded evapora

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16

Wiekiera, Radosław. "Technical and Economic Analysis of the Use of Heat Pumps in a Public Facility." Civil and Environmental Engineering Reports 32, no. 4 (2022): 376–88. http://dx.doi.org/10.2478/ceer-2022-0063.

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Abstract A heat pump uses natural energy from renewable sources such as air, ground or water. The pump, acquiring thermal energy from the environment (75%) and using electricity (25%), supplies it to the heated object. A heat pump-based system consists of a ground heat source (heat is taken from it), a heat pump unit and an upper heat source (heat is transferred to it). The refrigerant transfers heat from the lower heat source to the upper heat source. The paper discusses types of heat pumps in terms of the use of the lower heat source. A technical and economic analysis was carried out on the

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17

Bie, Yufeng, Zhu Zheng, Zhen Yan, and Yunfei Chen. "Simulation and experimental study of heat pump air-side heat transfer." Journal of Physics: Conference Series 2862, no. 1 (2024): 012041. http://dx.doi.org/10.1088/1742-6596/2862/1/012041.

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Abstract A simulation model is developed for the air side of a heat pump dryer which defines the smallest heat exchange unit between fins and air, focusing on the heat exchange between them. A self-constructed test bench was designed to control the temperature and humidity inlet of the heat pump and minimize the impact of environmental factors. The study examined the impact of diverse inlet conditions on heat pump heat transfer performance via a test bench. The experimental results were compared to the simulation outcomes to verify the precision of the model, which recorded a 3.31% outlet temp

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18

Li, Yun, and Kai Song. "Economic Analysis of the Absorption Heat Pump in Supercritical Unit." Applied Mechanics and Materials 291-294 (February 2013): 1666–69. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.1666.

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As an effective energy-saving device, the heat pump is environmentally friendly and advantageous in the recovery of low-temperature and middle-temperature waste heat. So it is increasingly being used in practical applications. The circulating water which is produced by power plants has a large number of low-temperature waste heat. It will bring huge economic and environmental benefits by using heat pump technology to recover those waste heat energy. The application of the heat pump in supercritical unit is discussed as the example of central heating project using waste heat in a power plant. A

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19

Kny, M., V. Mazanec, D. Adamovský, and J. Včelák. "Air Handling Unit with Heat Pump." IOP Conference Series: Earth and Environmental Science 290 (June 21, 2019): 012078. http://dx.doi.org/10.1088/1755-1315/290/1/012078.

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20

Bogdanova, E., and A. Grinberg. "Multi-unit heat pump and system." International Journal of Energy Research 16, no. 9 (1992): 803–10. http://dx.doi.org/10.1002/er.4440160903.

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21

FINYK, Iryna. "FEATURES OF THE USE OF HEAT PUMPS IN THE HEATING SYSTEMS OF PRIVATE HOUSES." Herald of Khmelnytskyi National University. Technical sciences 311, no. 4 (2022): 14–17. http://dx.doi.org/10.31891/2307-5732-2022-311-4-14-17.

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In the paper, it is investigated that economics is the main advantage of thermal pumps. The financial costs during the heating season are almost three times lower than natural gas. You do not need any permissions to connect. The operation of heat pump units is absolutely safe and environmentally friendly. Since ancient times, heat pump units have been used as alternative heating systems. Such systems are reliable, have a long term of operation and are the most environmentally friendly. Heat pump units are seen as a new step toward the development of more efficient and safer systems. The main h

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22

Park, Hansaem, and Min Soo Kim. "Theoretical Limit on COP of a Heat Pump from a Sequential System." International Journal of Air-Conditioning and Refrigeration 23, no. 04 (2015): 1550029. http://dx.doi.org/10.1142/s2010132515500297.

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The theoretical limit on Coefficient of performance (COP), which is maximum and ideal one, is investigated with a sequential Carnot heat pump where multiple Carnot heat pumps are interconnected in parallel. Using fundamental relations from thermodynamics and heat transfer, the performance of a sequential Carnot heat pump is obtained analytically. The effect of major parameters of the system, such as the number of individual heat pumps in a sequential system, the number of transfer unit of heat exchangers, and temperatures of heat sources, on the performance is researched. Also, expressions for

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23

Antipov, Yuri A., Irina I. Shatalova, Kirill V. Shkarin, et al. "Features of modeling a highly efficient multistage vapor compression heat pump unit." RUDN Journal of Engineering Researches 22, no. 4 (2021): 339–47. http://dx.doi.org/10.22363/2312-8143-2021-22-4-339-347.

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The increase in the cost of fuel and energy resource and the deterioration of the environment from the combustion of traditional fossil fuel, have led to a great interest in energy-saving technology by using secondary energy resources in the thermal energy of industrial, housing and communal services using heat pump units in Russia and abroad. This paper analyzes the well-known two-stage heat pump units, and reveals their advantages in comparison with single-stage. The modeling of a highly efficient multistage vapor compression heat pump unit is proposed. Moreover, a method for calculating a m

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24

Sit, M.L., O.I. Goncharov, A.A. Juravliov, V.I. Burciu, and D.V. Timchenko. "Heat Pump Using Heat Exchangers with Variable Heat Transfer Surface." Problemele Energeticii Regionale 3(38) (December 15, 2018): 52–61. https://doi.org/10.5281/zenodo.2222344.

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The paper presents deal with the heat pump designed mainly for heat supply systems using the qualitative law of regulation of the heat supply mode (constant flow rate of the heat carrier). For this purpose, an air-to-water heat pump with carbon dioxide as a refrigerant and compressor driven be gas piston unit is used. The aim of the work is to develop a scheme in which the position of the operating point of the heat pump compressor does not depend on fluctuations in the refrigerant flow rate, as well as using the heat produced by the gas engine - driven by the heat pump compressor. This goal a

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25

Qiu, Wei, Li Zhang, and Qing Rong liu. "Research on the Heating Plan of Recovering Condensing Heat of Power Plant by Water Source Heat Pump Unit." Advanced Materials Research 608-609 (December 2012): 1241–45. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.1241.

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This paper analyses the energy consumption of water source heat pump, shows that the performance coefficient of water source heat pump unit is directly related to the temperature of water resources, and discusses the feasibility of central heating by recovering condensing heat of power plant using water source heat pump unit. It analyzes the energy saving benefit of water source heat pump unit is significant compared with traditional heating. Using the technology recovers waste heat of power plant, which can not only decrease the energy waste on the direct discharge of waste heat and water, bu

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26

Wang, Jiongming, Feng Wang, Zhenglong Yu, et al. "Study on the Steam Source Selection of Feed Pump Turbine Based on Energy Matching." Energy and Environment Research 11, no. 1 (2021): 86. http://dx.doi.org/10.5539/eer.v11n1p86.

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The first phase of a power plant has two subcritical 300 MW units, and each boiler feed water pump is equipped with two with 50% capacity steam driven feed pumps and one 50% capacity electric start-up feed pump. The two steam pumps are put into operation during normal operation. After the heat supply transformation in the unit of the first phase of this power plant and based on the calculation and analysis of the heat balance of the unit, it is found that there will be insufficient output of the feed pump due to the insufficient steam source after the flow-through transformation, which will af

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27

Wu, Ronghua, Hao Yu, and Ying Xu. "Computational Intelligence Powered Experimental Test on Energy Consumption Characteristics of Cold-Water Phase-Change Energy Heat Pump System." Computational Intelligence and Neuroscience 2022 (September 6, 2022): 1–9. http://dx.doi.org/10.1155/2022/1941855.

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In order to study the influence on the effective energy efficiency ratio, the energy consumption characteristics of a cold-water phase change heat pump system are discussed in this article. An experimental system of the cold-water phase-change energy heat pump system is designed and constructed, and then the deicing energy consumption and unit energy consumption of the heat pump system are analyzed by computational intelligence-powered methods. At last, the primary energy utilization ratio of the heat pump system is calculated. The results show that under the setting conditions, the deicing ca

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28

Boahen, Samuel, Kwang Lee, and Jong Choi. "Refrigerant Charge Fault Detection and Diagnosis Algorithm for Water-to-Water Heat Pump Unit." Energies 12, no. 3 (2019): 545. http://dx.doi.org/10.3390/en12030545.

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Refrigerant charge faults have a great adverse effect on the performance of heat pumps and must therefore be detected and diagnosed early in real time. In this study, the effect of refrigerant charge faults on a water-to-water heat pump is experimentally investigated in cooling mode and heating mode at various outdoor entering water temperature conditions. The study showed that refrigerant undercharge affects the performance of water-to-water heat pump more in heating mode than in cooling mode. Results from the study are used to develop a refrigerant charge fault detection and diagnosis (FDD)

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29

Anikina, Irina, and Vyacheslav Suslov. "Influence of heat pumps inclusion in deaeration scheme of heating network make-up water on the operating modes of the TPP." MATEC Web of Conferences 245 (2018): 15004. http://dx.doi.org/10.1051/matecconf/201824515004.

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The idea of using a heat pump in the heating cycle seems quite attractive at first glance, but requires careful analysis of the effect of the heat pump on the operation mode of the thermal power plant. In this work we analyze the influence of the heat pumps inclusion in deaeration schemes of heating network make-up water on the operating modes of the CHP. All calculations were made for the real scheme of the de-aeration plant DSV-800 of the power unit with a T-100 turbine. The calculations were carried out for three schemes of heat pumps of different capacities. The calculations took into the

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30

Wu, Jin Shun, Yue Bo Hu, De Zhi Hu, and Hong Wei Liu. "The Heating Coefficient Experimental Analysis of Solar Water-Assisted Low Temperature Air Source Heat Pump System." Advanced Materials Research 953-954 (June 2014): 136–43. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.136.

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In winter,Many families use air source heat pump because of the low evaporation temperature of the system, resulting in lower heating efficiency of system. To solve this problem, the low temperature solar assisted hot water was added to the project which is on the basis of air source heat pump, and the system has been tested. After analysis of the collection efficiency of solar collectors at low temperatures and comparative analysis of the temperature cycle, pressure, energy consumption of the low-temperature solar-assisted systems and air source heat pump system, the optimal collector tempera

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Liu, Zhen Zhao, Bo Song, Ying Ning Hu, and Shan Shan Hu. "The Contrast Experimental Study of Sewage Source Heat Pump System and Ground Source Heat Pump System in Hot Summer and Cold Winter Area." Advanced Materials Research 953-954 (June 2014): 698–704. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.698.

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For two practical engineering case in a University in Guilin, this paper mainly introduces the performance of sewage-source heat pump and ground source heat pump and compare the running status in two kinds of system. The studies have shown that the sewage source heat pump unit COP at about 3.9, the system COP at about 3.3, ground source heat pump unit COP at about 4.5, the system COP at about 3.4.

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Vyshemirsky, M., O. Zhabin, and S. Ostapchuk. "Analysis of SG Feeding by Mobile Pump under Total Blackout of NPP with VVER-1000/320." Nuclear and Radiation Safety, no. 4(72) (November 14, 2016): 25–31. http://dx.doi.org/10.32918/nrs.2016.4(72).04.

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The paper presents the analysis of steam generator feeding by mobile pump under power unit total blackout with loss of heat removal to the ultimate heat sink. Thermohydraulic model of NPP with VVER-1000/320 for RELAP5/MOD3.2 was used in calculations. The assessment of hydraulic loss of mobile pump head was performed based on initial data of Zaporizhzhya NPP Unit 1. Results of thermohydraulic calculations confirmed the effectiveness of SG feeding via mobile pump at an early and late stages of the accident and revealed typical aspects of the transient progression.

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Yin, Caihong, Ronghua Wu, Hao Zhan, Hao Yu, and Changqing Liu. "Computational Intelligence Powered Performance Analysis on Phase Change Heat Storage Air Source Heat Pump System." Computational Intelligence and Neuroscience 2022 (August 4, 2022): 1–10. http://dx.doi.org/10.1155/2022/8906838.

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Aiming at the performance deterioration of air source heat pump at low temperature in cold area, an air source heat pump system with sodium chloride aqueous solution as low temperature phase change heat storage material was proposed to increase the air inlet temperature of the unit under low temperature conditions and improve the low temperature performance of the heat pump unit. The system form, unit energy consumption model, and economic model were given, and the operating economy of the traditional electric auxiliary heat air source heat pump system and the phase change heat storage air sou

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34

Il'ina, T. N., P. A. Orlov, and A. O. Echina. "Efficiency of Operation of Air Heat Pumps with Evaporators of Various Designs." Proceedings of the Southwest State University 27, no. 2 (2023): 62–74. http://dx.doi.org/10.21869/2223-1560-2023-27-2-62-74.

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Resume. The development of the heat pump market ensures the growth of energy prices, the fight against global warming and the stimulation of the growth rates of countries in transition to "clean energy sources". the most environmentally friendly and energy efficient, taking into account the cost of their installation and the impact of air source heat pumps compared to geothermal ones. However, their use in countries with cold climates is limited by the formation of frost on the evaporator unit heat exchanger, which significantly increases their heating capacity and conversion efficiency.Purpos

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35

Li, Chen, Baoyun Qiu, Tianxu Yan, Huijie Wang, Fangling Zhao, and Guipeng Qi. "The Optimization Strategy of Pump-Valve Combined Scheduling and Pump Unit Reselection in Heating Systems." Journal of Physics: Conference Series 2854, no. 1 (2024): 012072. http://dx.doi.org/10.1088/1742-6596/2854/1/012072.

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Abstract This research successfully implemented time and spatial division control for residential heating through theoretical analysis and optimization, with the goal of meeting occupants’ comfort requirements and achieving energy savings and emissions reduction. Firstly, the investigation calculated the optimal heating capacity for different functional areas within the buildings at various times. Secondly, by considering the heat transfer characteristics of the heating system, as well as pipe and valve resistance properties, and the performance of the centrifugal pump, the research establishe

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36

Amoabeng, Kofi, and Jong Choi. "Performance Analysis on the Optimum Control of a Calorimeter with a Heat Recovery Unit for a Heat Pump." Energies 11, no. 9 (2018): 2210. http://dx.doi.org/10.3390/en11092210.

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Heat pumps are used in many applications, both in households and industries, for space air conditioning and hot water provision. The calorimeter is the equipment used in testing the heat pump system to obtain performance data. In the conventional testing mode and under standard conditions, the calorimeter utilizes a lot of energy through refrigeration and heating systems. In this study, a newly developed calorimeter with a heat recovery unit was used to test the performance of a water-to-water heat pump system. The aim was to minimize the rate of energy used in the conventional calorimeter. Tw

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37

McIntyre, D. A. "Domestic ventilation unit with heat exchanger and heat pump." Building Services Engineering Research and Technology 10, no. 1 (1989): 13–19. http://dx.doi.org/10.1177/014362448901000102.

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Trubaev, P., Yu Koshlich, A. Belousov, D. Buhanov, A. Grebenik, and D. Prasol. "RESEARCH OF GEOTHERMAL HEAT PUMP UNIT EFFICIENCY IN CLIMATIC CONDITIONS OF RUSSIAN REGIONS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 10, no. 3 (2024): 49–67. https://doi.org/10.34031/2071-7318-2024-10-3-49-67.

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Currently, there is an opinion that heating with heat pumps is effective only in regions with warm climate. In this paper we have evaluated the performance of heat pump units (HPU) for six typical Russian regions with GWP from 2526 to 10360. Since the energy consumption in the heat pump cycle depends on the temperature difference between the cold and hot coolant, the actual average daily outdoor air temperature for 2014-2023 was used for calculation. A methodology of thermodynamic calculation of the heat pump cycle and determination of energy consumption at different outdoor air temperature in

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Fedosov, Sergey V., Azariy A. Lapidus, Vadim N. Fedoseev, and Alexander M. Sokolov. "Prospects of using heat pumps for the thermal treatment of concrete in the field." Vestnik MGSU, no. 6 (June 2022): 747–55. http://dx.doi.org/10.22227/1997-0935.2022.6.747-755.

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Introduction. In the cold Russian climate, thermal treatment of concrete is kind of a mandatory operation conducted to accelerate concrete curing as part of the manufacturing of reinforced concrete products and structures. In practical work, concreting at low temperatures in the field may be accompanied by a shortage and high cost of energy resources needed to perform such thermal treatment.  Materials and methods. A promising economical solution to the problem of thermal treatment of concrete and reinforced concrete products in the field is the use of air heat pump systems. The re

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Wang, Zhi Yi, Jian Jun Li, and Zu Dong Pan. "Experimental Study on New Sewage Source Heat Pump Unit." Applied Mechanics and Materials 316-317 (April 2013): 49–52. http://dx.doi.org/10.4028/www.scientific.net/amm.316-317.49.

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By the analysis of the current technical conditions and existing problems, some improvements are carried out on the urban sewage source heat pump unit. are as follows: Refrigerants side switch sewage source heat pump system, dual-purpose heat exchange for evaporating and condensing & wastewater can enter the unit directly are of the main features of the improved units. Some important techniques, such as inverter screw compressor and variable compressor inner volume ratio are used to the improved unit at the same time. From the authoritative organization’s test, the improved sewage-source h

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Abildinova, S. K., R. A. Musabekov, A. S. Rasmukhametova, and S. V. Chicherin. "Evaluation of the Energy Efficiency of the Stage Compression Heat Pump Cycle." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 62, no. 3 (2019): 293–302. http://dx.doi.org/10.21122/1029-7448-2019-62-3-293-302.

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The increase in production and modernization of existing heat pumps are global trends in the development and implementation of heat pump technology. Application of refrigerant with zero potential ozone depletion relative to fluorinetrichloromethane and minimum values of global warming potentials relative to carbon dioxide is environmentally justified in pumps. Prospective are stage compression heat pump units and, also, consecutive and cascade schemes of inclusion which provide higher temperature of the heat carrier in the system of heat supply. Improving the efficiency of the heat pump depend

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Olishevskyi, I. H. "Substantiation of energy efficiency of automated heating technology at HPS." Electrical Engineering and Power Engineering, no. 2 (June 27, 2024): 36–43. http://dx.doi.org/10.15588/1607-6761-2024-2-4.

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Purpose. Justification of rational control parameters of heat pumps to ensure energy-efficient operation of hydroelectric power plants in heating mode. Development of an automated methodology for calculating rational parameters for a complex system of hydroelectric power station (HPS) operating in heating mode. Methodology. Mathematical analysis and modeling. Findings. The application of the heat pump to ensure the heating mode at the hydroelectric power station for the needs of heating and hot water supply of buildings is analytically substantiated, as well as the rational parameters of the h

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Olishevskyi, Illia, Oleksandr Gusev, and Hennadii Olishevskyi. "Automated methodology of calculating parameters for non-traditional technology of heating mode of hydro-storage power plant station." Electrical Engineering and Power Engineering, no. 1 (June 30, 2023): 36–42. http://dx.doi.org/10.15588/1607-6761-2023-1-4.

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Purpose. Justification of the rational parameters of heat pumps and heat accumulators to ensure the efficient operation of the hydro storage power plant (HSPP) in the heating mode. Development of an automated methodology for calculating rational parameters for a complex system of a hydro storage power plant operating in heating mode. Methodology. Mathematical analysis and modeling. Findings. Using the developed automated calculation method, it was analyzed and determined that passing through the heat pump the full flow of water passing through the hydro unit is impractical and ineffective, bec

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Frik, Anton, Juozas Bielskus, and Mikelis Dzikevics. "Experimental Study on the Control of the Positions of the Cycle Isotherms of the Heat Pump in the Air Handling Unit." Environmental and Climate Technologies 27, no. 1 (2023): 889–99. http://dx.doi.org/10.2478/rtuect-2023-0065.

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Abstract The use of air-to-air heat pumps in modern air handling units is becoming more popular for building heating and cooling supply. However, the constantly changing state of outdoor air (temperature, humidity) means that energy conversion modes of heat pumps need to be flexible and able to efficiently respond to ambient air parameters. The ability to adapt to changes in ambient air conditions in an efficient and rational manner is a crucial factor to consider when selecting the operating mode and control of energy transformers. Modern commercial heat pumps typically have two control degre

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Liu, Jian Tao, Xiao Cheng Ma, Kun Kun You, Jian Xing Ren, and Yong Wen Yang. "Analysis on Circulating Water Heat Utilization Technology in Thermal Power Plants." Advanced Materials Research 753-755 (August 2013): 2727–30. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2727.

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The thermal power unit is the major unit in Chinas power supply. Circulating water has large low-temperature waste-heat which can be recycled. The principles of water source heat pump technology is analyzed, characteristic of circulating water system in thermal power unit is studied. Then two kinds of connection methods between circulating water system and water source heat pump (WSHP) are presented.

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Liu, Shuailing, Guoyuan Ma, Xiaoya Jia, Shuxue Xu, and Guoqiang Wu. "Simulation research on heat recovery system of heat pump composite pump-driven loop heat pipe." Thermal Science, no. 00 (2022): 44. http://dx.doi.org/10.2298/tsci211119044l.

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To promote energy-saving potentials of the energy recovery unit under all-year conditions, a composite system combining pump-driven loop heat pipe with heat pump was firstly proposed, and the mathematical models were established. The operating characteristics of the composite system were studied in the whole year and compared with the traditional heat pump heat recovery system. The results show that the heating capacity of the composite system is in line with the heating load in winter. Compared with the traditional heat pump system, the composite system has higher energy efficiency ratio and

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Bogza, M., and D. Biryukov. "Development of a complex model of heat supply of a house based on a heat pump in the Simulink environment." System technologies 1, no. 156 (2025): 117–26. https://doi.org/10.34185/1562-9945-1-156-2025-14.

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The article presents a dynamic model of a house heat supply system based on a heat pump unit (HPU) developed in the MATLAB Simulink environment using Simscape blocks to model thermal processes. The relevance of the study is emphasized by the need to reduce fos-sil fuel consumption, which has increased the demand for energy-efficient technologies and systems based on renewable energy sources. Optimizing such systems is critical in the context of global efforts to improve building energy efficiency. The model considers the structural features of the house, including the materials of the enclosin

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Li, Yang, and Xiu Juan Liang. "Experimental Study on Energy Saving between Heat Pump Unit of Heat Recovery Fresh Air and Heat Pipe Heat Pump Low Temperature Heat Recovery Unit in the Cold and Severe Cold Regions." Applied Mechanics and Materials 535 (February 2014): 37–41. http://dx.doi.org/10.4028/www.scientific.net/amm.535.37.

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In the cold and severe cold regions of our country, the average temperature in winter outdoor usually below -20°C. Air conditioning units was limited and damaged when it running under such conditions. In order to solve the the problems pointed out previously, the paper put forward solutions of the fresh air handling units in combination with heat pump unit of heat recovery fresh air and heat pipe heat pump low temperature heat recovery unit. Comparison energy-saving and recovery period of the two method through experimental research.

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Li, Biao, and Jiang Fan. "Influence of Temperature Parameter Change on Lithium Bromide Absorption Heat Pump Performance." Applied Mechanics and Materials 291-294 (February 2013): 1670–74. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.1670.

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It is the new way of the thermal power plant energy conservation to recycling plant circulating water waste heat for heating with the heat pump technology. The recovery of low temperature waste heat is the background. And lithium bromide absorption heat pump is the object of this study. The impact of changes in temperature parameters on the performance of heat pump unit is analyzed. As a theoretical basis for the design of the heat pump system and power plant heat pump unit’s optimal operation provide a reference. The result provides a theoretical reference for the optimal operation of the hea

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Šulgan, Branislav, Juraj Labovský, Miroslav Variny, and Zuzana Labovská. "Multi-Objective Assessment of Heat Pump-Assisted Ethyl Acetate Production." Processes 9, no. 8 (2021): 1380. http://dx.doi.org/10.3390/pr9081380.

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Multi-objective (energy–economic–safety) assessment of ethyl acetate production involving a heat pump is presented in this paper. The heat pump is designed to intensify ethyl acetate separation and to reduce the total operating cost. Two ethyl acetate production pathways are upgraded using a heat pump, conventional process and reactive distillation column with a separation unit. Detailed process models including the heat pump environment have been compiled and optimized in the Aspen Plus software. Both benefits and drawbacks of including the heat pump in the processes are evaluated using three

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