Log in

Relevant bibliographies by topics / Break thermal efficiency / Journal articles

To see the other types of publications on this topic, follow the link: Break thermal efficiency.

Journal articles on the topic 'Break thermal efficiency'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Break thermal efficiency.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Susorova, Irina, Brent Stephens, and Benjamin Skelton. "The Effect of Balcony Thermal Breaks on Building Thermal and Energy Performance: Field Experiments and Energy Simulations in Chicago, IL." Buildings 9, no. 9 (2019): 190. http://dx.doi.org/10.3390/buildings9090190.

Full text

Abstract:

A common envelope performance problem in buildings is thermal bridging through balcony slab connections, which can be improved with the use of commercially available thermal break products. Several prior studies have used simulation-based and/or hot box test apparatus approaches to quantify the likely effect of balcony thermal breaks on effective thermal resistance of building enclosures. However, in-situ measurements of thermal performance in real buildings remain limited to date. This study uses a combination of field measurements and models to investigate the effects of installing balcony t

APA, Harvard, Vancouver, ISO, and other styles

2

Xiao, Helin, Xiaolong Yang, Ru Wang, Shengjun Li, Jie Ruan, and Hongling Ju. "The effects of exhaust gas re-circulation and injection timing on combustion performance and emissions of biodiesel and its blends with 2-methylfuran in a diesel engine." Thermal Science 24, no. 1 Part A (2020): 215–29. http://dx.doi.org/10.2298/tsci190112304x.

Full text

Abstract:

In this study, the influences of injection timing and exhaust gas re-circulation on combustion and emissions characteristics of biodiesel/2-methylfuran blends are investigated on a modified water-cooled 4-cylinder four-stroke direct injection compression ignition engine. The experimental conditions are, respectively, to adjust injection timing and exhaust gas re-circulation ratio at 0.38 MPa break mean effective pressure with the engine speed at 1800 rpm constantly. With injection timing in advance, the peak cylinder pressure rose while maximum heat re-lease rate first decreased and next sligh

APA, Harvard, Vancouver, ISO, and other styles

3

Santos, Paulo, Diogo Mateus, Daniel Ferrandez, and Amparo Verdu. "Numerical Simulation and Experimental Validation of Thermal Break Strips’ Improvement in Facade LSF Walls." Energies 15, no. 21 (2022): 8169. http://dx.doi.org/10.3390/en15218169.

Full text

Abstract:

Thermal bridges may have a significant prejudicial impact on the thermal behavior and energy efficiency of buildings. Given the high thermal conductivity of steel, in Lightweight Steel Framed (LSF) buildings, this detrimental effect could be even greater. The use of thermal break (TB) strips is one of the most broadly implemented thermal bridge mitigation technics. In a previous study, the performance of TB strips in partition LSF walls was evaluated. However, a search of the literature found no similar experimental campaigns for facade LSF walls, which are even more relevant for a building’s

APA, Harvard, Vancouver, ISO, and other styles

4

Jasim, Ra’ed R. "Experimental Study of the Effect of Octane Number on the Performance Coefficients of the Two Strokes Spark Ignition Engine." Tikrit Journal of Engineering Sciences 16, no. 3 (2009): 12–17. http://dx.doi.org/10.25130/tjes.16.3.08.

Full text

Abstract:

The experiments had been carried out using two stroke, single cylinder type (TD113), with compression ratio of (7.3:1) Coupled to hydraulic dynamometer type (TD115). The results showed that there is enhancement of the engine performance with increasing octane number. This appears clearly when comparing the results of performance with fuel of 75 and 95 octane number. The torque increases 10% at speed of 2750 RPM. The break power also increases 18% when the octane number changed from 75 to 95 at 3000 RPM of engine speed. The same change in octane number will increase the thermal efficiency by 9%

APA, Harvard, Vancouver, ISO, and other styles

5

Yuvarajan, D., K. Pradeep, and S. Magesh Kumar. "Impact of Oxygenated Additives on Performance Characteristics of Methyl Ester in IC Engine." Applied Mechanics and Materials 852 (September 2016): 724–28. http://dx.doi.org/10.4028/www.scientific.net/amm.852.724.

Full text

Abstract:

In this present work, the impact of blending n-butyl alcohol, a next generation biofuel with jatropha biodiesel on the performance of a diesel engine are examined. Tests were performed on a constant speed compression ignition engine using n-butyl alcohol / jatropha biodiesel blends. N-butyl alcohol was added to jatropha biodiesel by 10, 20 and 30% by volume. Performance parameters namely break thermal efficiency (BTE), Brake specific fuel consumption (BSFC) and Exhaust gas temperature (EGT) were analyzed in this work. It was experimentally found that by adding n-butyl alcohol to neat jatropha

APA, Harvard, Vancouver, ISO, and other styles

6

Guanco, Jerry, and Leomarich Casinillo. "Performance Evaluation of a Rice Hull-fueled Cabinet Food Dryer." Recoletos Multidisciplinary Research Journal 9, no. 1 (2021): 23–38. http://dx.doi.org/10.32871/rmrj2109.01.03.

Full text

Abstract:

This study was conducted to determine the technical performance of a rice hull-fueled cabinet food dryer. Data gathered from the drying performance in terms of drying behavior, drying rate, and dryer heat utilization efficiency using cassava chips was analyzed through an experimental design. The study also evaluated fuel consumption, thermal conversion efficiency, energy use efficiency, heat utilization efficiency, temperature distribution and economic performance. Results indicated that the dryer's average fuel consumption and the thermal conversion efficiency is 11.19 kg/hr and 6.17%. While

APA, Harvard, Vancouver, ISO, and other styles

7

Santos, Paulo, Paulo Lopes, and David Abrantes. "Thermal Performance of Load-Bearing, Lightweight, Steel-Framed Partition Walls Using Thermal Break Strips: A Parametric Study." Energies 15, no. 24 (2022): 9271. http://dx.doi.org/10.3390/en15249271.

Full text

Abstract:

Thermal bridges are a very relevant issue for lightweight steel-framed (LSF) construction systems given the high thermal conductivity of steel, which can negatively compromise their thermal behaviour, reduce their durability, and decrease the building energy efficiency. Several thermal bridge mitigation strategies exist, including the attachment of thermal break strips (TBS) to the steel studs’ flanges as one of the most widely employed techniques. In this research, the relevance of TBS to the thermal performance improvement of load-bearing LSF partition walls was assessed by performing a para

APA, Harvard, Vancouver, ISO, and other styles

8

Tran, Quoc Dang. "Effect of ignition timing on engine characteristics of a single cylinder spark ignition engine with CNG fueled." Science and Technology Development Journal 20, K6 (2017): 79–86. http://dx.doi.org/10.32508/stdj.v20ik6.1179.

Full text

Abstract:

This article shows an investigated research on Compressed Natural Gas (CNG) engine with a port injection when varying ignition timing. The obtained results from simulating study have indicated that both of brake thermal efficiency and torque have a similar trend when varying ignition timing. The effect of ignition timing on the value of brake thermal efficiency is stronger in comparison with torque, however, the increase in engine speed or lambda value have to adjust the ignition timing more early. To reach the maximum break torque at each engine speed, the ignition timing should be adjusted I

APA, Harvard, Vancouver, ISO, and other styles

9

Mohan, B., S. Raju, and M. Srinivasnaik. "Experimental Investigation on Performance Characteristics o f Diesel Engine Using Various Blended Biodiesels." Indian Journal Of Science And Technology 17, no. 37 (2024): 3865–70. http://dx.doi.org/10.17485/ijst/v17i37.2793.

Full text

Abstract:

Objectives: To evaluate the performance characteristics of diesel engines through experimental research with various biodiesel blends. Method: Three types of oils were chosen for this study: waste cooking oil, waste chicken oil, and palm oil. The methyl esters were produced from waste chicken oil (COME), waste cooking oil (WCOME), and palm oil (POME). The test runs were done on a 4.5 kW direct injection, air-cooled, four-stroke, single-cylinder, and constant-speed diesel engine using varied fuel at maximum load. Findings: This study finds performance analysis for a variety of methyl esters and

APA, Harvard, Vancouver, ISO, and other styles

10

Chai, Jian, Wenyue Fan, and Jing Han. "Does the Energy Efficiency of Power Companies Affect Their Industry Status? A DEA Analysis of Listed Companies in Thermal Power Sector." Sustainability 12, no. 1 (2019): 138. http://dx.doi.org/10.3390/su12010138.

Full text

Abstract:

Under the concept of green development, coal and oil control policies were frequently introduced, but the “cold” thinking under the “hot” environment is more conducive to the smooth promotion of the “transitional period” of China’s power-structure transformation. How to better consider production efficiency and environmental benefits is the theme that thermal power enterprises need to constantly break through. The most feasible “transitional period” path for thermal power enterprises is improving the efficiency of energy saving, reducing emissions, and simultaneously ensuring benefits and soci

APA, Harvard, Vancouver, ISO, and other styles

11

Santos, Paulo, and Telmo Ribeiro. "Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils." Energies 14, no. 21 (2021): 6927. http://dx.doi.org/10.3390/en14216927.

Full text

Abstract:

The reduction of unwanted heat losses across the buildings’ envelope is very relevant to increase energy efficiency and achieve the decarbonization goals for the building stock. Two major heat transfer mechanisms across the building envelope are conduction and radiation, being this last one very important whenever there is an air cavity. In this work, the use of aerogel thermal break (TB) strips and aluminium reflective (AR) foils are experimentally assessed to evaluate the thermal performance improvement of double-pane lightweight steel-framed (LSF) walls. The face-to-face thermal resistances

APA, Harvard, Vancouver, ISO, and other styles

12

Spasov, I., J. Donov, N. P. Kolev, and L. Sabotinov. "CATHARE Multi-1D Modeling of Coolant Mixing in VVER-1000 for RIA Analysis." Science and Technology of Nuclear Installations 2010 (2010): 1–11. http://dx.doi.org/10.1155/2010/457094.

Full text

Abstract:

The paper presents validation results for multichannel vessel thermal-hydraulic models in CATHARE used in coupled 3D neutronic/thermal hydraulic calculations. The mixing is modeled with cross flows governed by local pressure drops. The test cases are from the OECD VVER-1000 coolant transient benchmark (V1000CT) and include asymmetric vessel flow transients and main steam line break (MSLB) transients. Plant data from flow mixing experiments are available for comparison. Sufficient mesh refinement with up to 24 sectors in the vessel is considered for acceptable resolution. The results demonstrat

APA, Harvard, Vancouver, ISO, and other styles

13

Deyazada, Mohammed, Hervé Degée, and Bram Vandoren. "Numerical Analysis of the Structural Resistance and Stability of Masonry Walls with an AAC Thermal Break Layer." Sustainability 13, no. 21 (2021): 11647. http://dx.doi.org/10.3390/su132111647.

Full text

Abstract:

Since energy efficiency has become the main priority in the design of buildings, load-bearing walls in modern masonry constructions nowadays include thermal break elements at the floor–wall junction to mitigate thermal bridges. The structural stability of these bearing walls is consequently affected. In the present paper, a numerical study of the resistance and stability of such composite masonry walls, including AAC thermal break layers, is presented. A finite element mesoscopic model is successfully calibrated with respect to recent experimental results at small and medium scale, in terms of

APA, Harvard, Vancouver, ISO, and other styles

14

Valencia, Guillermo, José Núñez, and Jorge Duarte. "Multiobjective Optimization of a Plate Heat Exchanger in a Waste Heat Recovery Organic Rankine Cycle System for Natural Gas Engines." Entropy 21, no. 7 (2019): 655. http://dx.doi.org/10.3390/e21070655.

Full text

Abstract:

A multiobjective optimization of an organic Rankine cycle (ORC) evaporator, operating with toluene as the working fluid, is presented in this paper for waste heat recovery (WHR) from the exhaust gases of a 2 MW Jenbacher JMS 612 GS-N.L. gas internal combustion engine. Indirect evaporation between the exhaust gas and the organic fluid in the parallel plate heat exchanger (ITC2) implied irreversible heat transfer and high investment costs, which were considered as objective functions to be minimized. Energy and exergy balances were applied to the system components, in addition to the phenomenolo

APA, Harvard, Vancouver, ISO, and other styles

15

Iortyer, H. A. Adoga F. I. and Tuleun L.T. "PERFORMANCE OF A CI ENGINE FUELLED WITH CASHEW NUT SEED OIL BIODIESEL- EFFECT OF LOAD." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 4, no. 7 (2017): 104–13. https://doi.org/10.5281/zenodo.836623.

Full text

Abstract:

Investigation of the performance of cashew- nut seed oil biodiesel and its blends with petroleum diesel in an internal combustion (I.C.) engine was undertaken. The seeds of cashew-nut were grounded using a grinding engine and pressurized mechanically using manual method to extract the oil. The oil was then transesterified to biodiesel using 1% potassium hydroxide (KOH), as catalyst with 102.2g of ethanol and 282g of oil at 60<sup>o</sup>C with stirring over water bath maintained for 10 minutes. The biodiesel produced was further blended with diesel fuel in the ratios of 10% - 100% cashew-nut o

APA, Harvard, Vancouver, ISO, and other styles

16

PROF., AMAR DOKHE, CHAUDHARI MOHIT, and KADAM SANKET. "A REVIEW PAPER ON DESIGN, FABRICATION & TRIAL ON MULTI CYLINDER PETROL ENGINE TEST RIG." JournalNX - A Multidisciplinary Peer Reviewed Journal 3, no. 4 (2017): 152–58. https://doi.org/10.5281/zenodo.1453802.

Full text

Abstract:

The basic task of the development engineer is to reduce the cost and improve power output and reliability of the engine. Trying to achieve these goals there is various design concepts to find the effects on engine performance of a particular design concept to resorts to testing. Thus, in general, developments of engine will have to conduct a wide variety of engine tests. Engine performance is an indication of the degree of success with which it is doing its assigned job. These performance characteristics can be verified by using a different Testing Methods. In this research to designed & f

APA, Harvard, Vancouver, ISO, and other styles

17

B, Mohan, Raju S, and Srinivasnaik M. "Experimental Investigation on Performance Characteristics o f Diesel Engine Using Various Blended Biodiesels." Indian Journal of Science and Technology 17, no. 37 (2024): 3865–70. https://doi.org/10.17485/IJST/v17i37.2793.

Full text

Abstract:

Abstract <strong>Objectives:</strong> To evaluate the performance characteristics of diesel engines through experimental research with various biodiesel blends. <strong>Method:</strong> Three types of oils were chosen for this study: waste cooking oil, waste chicken oil, and palm oil. The methyl esters were produced from waste chicken oil (COME), waste cooking oil (WCOME), and palm oil (POME). The test runs were done on a 4.5 kW direct injection, air-cooled, four-stroke, single-cylinder, and constant-speed diesel engine using varied fuel at maximum load. <strong>Findings:</

APA, Harvard, Vancouver, ISO, and other styles

18

Long, Wenxiao, Yulian Li, Yuanlin Chen, Qiulong Chen, and Dengmei Yu. "Inverse Design of Wavelength-Selective Film Emitter for Solar Thermal Photovoltaic System." Photonics 12, no. 3 (2025): 286. https://doi.org/10.3390/photonics12030286.

Full text

Abstract:

Solar photovoltaic (PV) technology is developing quickly due to the continual rise in demand for energy and environmental protection. Solar thermal photovoltaic (STPV) systems can break the Shockley–Queisser limit of conventional PV systems by reshaping the solar spectrum using selective absorbers and emitters. However, the traditional design method relies on the designer’s experience, which fails to achieve rapid designing of STPV devices and greatly improve the performance. In this paper, an STPV thin-film selective emitter is inversely designed based on a genetic algorithm. The optimized st

APA, Harvard, Vancouver, ISO, and other styles

19

Zhu, Zhihui. "Research Status of New Energy Vehicle Thermal Management." Highlights in Science, Engineering and Technology 96 (May 5, 2024): 21–28. http://dx.doi.org/10.54097/y4pvfq70.

Full text

Abstract:

Thermal management of new energy vehicles, as a way to break through the driving range of new energy vehicles and one of the guarantees of safety performance, has been paid more and more attention to. In order to improve the thermal management efficiency of new energy vehicles, the thermal management mode of the whole vehicle should be optimized, so that different parts can work at a suitable temperature, so as to ensure the functional safety and service life of the vehicle. Based on this, this paper analyzes the passenger cabin thermal management system through Positive Temperature Coefficien

APA, Harvard, Vancouver, ISO, and other styles

20

Bowen, Kayla, and Karen G. Harry. "Evaluating the Relationship between Ceramic Wall Thickness and Heating Effectiveness, Fuel Efficiency, and Thermal Shock Resistance." Midcontinental Journal of Archaeology 44, no. 3 (2019): 259–75. http://dx.doi.org/10.2307/26759198.

Full text

Abstract:

Abstract In 1983, David Braun proposed that a shift from thicker- to thinner-walled cooking vessels in the midwestern United States was triggered by an increased dietary reliance on starchy grains (Braun 1983). Drawing on well-established principles of materials science (Van Vlack 1964), he suggested that, compared to thicker-walled vessels, thinner-walled ones would have been more thermally efficient and less likely to break from thermal shock. These attributes, he suggested, would have been advantageous for preparing seeds and grains that require lengthy cooking periods. Although consistent

APA, Harvard, Vancouver, ISO, and other styles

21

Zhao, Yiting, Fan Yang, Jinlin Song, and Run Hu. "Bayesian-optimized infrared grating for tailoring thermal emission to boost thermophotovoltaic performance." Journal of Applied Physics 133, no. 12 (2023): 124904. http://dx.doi.org/10.1063/5.0138747.

Full text

Abstract:

Thermophotovoltaic (TPV) devices, which can break the Shockley–Queisser limit (33.7%) and enhance the thermal energy utilization efficiency, have garnered increasing attention in recent decades. Structuring the emitter surface has been demonstrated to be powerful for tailoring thermal emission to enhance the power density and system efficiency of a TPV system. However, the design and optimization of the broad parameters of the surface nanostructures manually remain to be thorny issues. In this paper, the Bayesian algorithm under the framework of material informatics was coupled with a rigorous

APA, Harvard, Vancouver, ISO, and other styles

22

Hassanzadeh, H., and S. H. Mansouri. "Efficiency of ideal fuel cell and Carnot cycle from a fundamental perspective." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 219, no. 4 (2005): 245–54. http://dx.doi.org/10.1243/095765005x28571.

Full text

Abstract:

In this paper, we accept the fact that fuel cell and heat engine efficiencies are both constrained by the second law of thermodynamics and neither one is able to break this law. However, we have shown that this statement does not mean the two systems should have the same maximum thermal efficiency when being fed by the same amounts of chemical reactants. The intrinsic difference between fuel cells (electrochemical systems) and heat engines (combustion engines) efficiencies is a fundamental one with regard to the conversion of chemical energy of reactions into electrical work. The sole reason h

APA, Harvard, Vancouver, ISO, and other styles

23

V. S. Yessaulkov and K. Mahkamov. "PONDERING THE CHOICE OF PCM AND MATHEMATICAL MODEL IN AUTOMOTIVE LHTS." Science and Technology of Kazakhstan, no. 4,2023 (December 29, 2023): 220–27. http://dx.doi.org/10.48081/nowd5861.

Full text

Abstract:

Phase change materials are latent heat storage materials. As the source temperature rises, the chemical bonds within the PCM break up as the material changes phase. Upon storing heat in the storage material, the material begins to melt when the phase change temperature is reached. The temperature then stays constant until the melting process is finished. The heat stored during the phase change process of the material is called latent heat. Ideally, automotive engine cooling is undesirable from the thermodynamic point of view. If the heat transfer rates from the gas to metal could be reduced, t

APA, Harvard, Vancouver, ISO, and other styles

24

Mitchell, Derek. "Thermal efficiency extends distance and variety for honeybee foragers: analysis of the energetics of nectar collection and desiccation by Apis mellifera." Journal of The Royal Society Interface 16, no. 150 (2019): 20180879. http://dx.doi.org/10.1098/rsif.2018.0879.

Full text

Abstract:

The desiccation of nectar to produce honey by honeybees ( Apis mellifera L.) is an energy-intensive process, as it involves a quasi-isothermal change in the concentration of sugars from typically 20 to 80% by vaporization (honey ripening). This analysis creates mathematical models for: the collected nectar to honey ratio; energy recovery ratio; honey energy margin; and the break-even distance, which includes the factors of nectar concentration and the distance to the nectar from the nest; energetics of desiccation and a new factor, thermal energy efficiency (TEE) of nectar desiccation. These m

APA, Harvard, Vancouver, ISO, and other styles

25

Chauhan, Kartikey, Joseph Daniel, Sreekanth Manavalla, and Priyadarshini Jayaraju. "Design and Experimental Studies of a Funnel Solar Cooker with Phase Change Material." Energies 15, no. 23 (2022): 9182. http://dx.doi.org/10.3390/en15239182.

Full text

Abstract:

Solar cookers can greatly reduce the overall carbon footprint of the cooking done in India. In the present work a funnel-type solar cooker is designed using cardboard. After making the solar cooker it is then analyzed on the various performance metrics namely the figures of merit, efficiency value and Cooker Opto–thermal Ratio (COR) which are dependent parameters. Paraffin wax which is a phase change material (PCM) is also incorporated in the testing process to evaluate the overall improvement in the thermal efficiency of the solar cooker. The time taken to break is also calculated. The experi

APA, Harvard, Vancouver, ISO, and other styles

26

Bee, Soo-Tueen, Wen-Ru Mok, Tin Sin Lee, Tiam-Ting Tee, Gulnaziya Issabayeva, and Abdul R. Rahmat. "Evaluation performance of multiple plasticizer systems on the physicomechanical, crystallinity and thermogravimetry of polyvinyl chloride." Journal of Polymer Engineering 34, no. 6 (2014): 521–29. http://dx.doi.org/10.1515/polyeng-2013-0324.

Full text

Abstract:

Abstract The flexibility of polyvinyl chloride (PVC) materials is crucial in the production of urine bags and urinary tubing. However, the combination and concentration of plasticizers offers a variation of the plasticizing efficiency to the PVC matrix. In this study, several types of plasticizers, namely dioctyl adipate (DOA), diisononyl phthalate (DINP), dioctyl terephthalate (DOTP) and epoxidized soybean oil (ESO) were added into the PVC matrix to enhance the flexibility of PVC compounds. Increasing the plasticizer loading level improved elongation at break of PVC compounds, whereas the ten

APA, Harvard, Vancouver, ISO, and other styles

27

Patel, Vimal. "Performance Investigation of Variable Compression Ratio Engine." International Journal for Research in Applied Science and Engineering Technology 9, no. 10 (2021): 1296–306. http://dx.doi.org/10.22214/ijraset.2021.38577.

Full text

Abstract:

Abstract: Variable Compression Ratio (VCR) engine test can be used to determine the effect of Compression Ratio (CR) on the performance and emissions of the engine. The combustion situation, when provided with a pressure transducer. The performance frequency parameters like efficiencies, power, and specific fuel consumption are determined. The combustion phenomenon is also observed through this work, we can find the optimum compression ratio for which the best performance is possible. In order to find out the optimum compression ratio, experiments were carried out on a single-cylinder four-str

APA, Harvard, Vancouver, ISO, and other styles

28

Luján, José Manuel, Héctor Climent, Santiago Ruiz, and Ausias Moratal. "Influence of ambient temperature on diesel engine raw pollutants and fuel consumption in different driving cycles." International Journal of Engine Research 20, no. 8-9 (2018): 877–88. http://dx.doi.org/10.1177/1468087418792353.

Full text

Abstract:

The effect of low ambient temperature on diesel raw pollutant emissions is analysed in two different driving cycles: NEDC and WLTC. The study is focused on hydrocarbons, carbon monoxide, nitrogen oxides and fuel consumption. Tests are conducted at cold start in a HSDI light-duty diesel engine with two levels of ambient temperature: 20 °C and −7 °C. Results showed a general detriment of pollutant emissions and break thermal efficiency at low ambient temperatures. NOx is increased around 250% in both cycles when running at low temperatures. Effect on hydrocarbons is more noticeable in the NEDC,

APA, Harvard, Vancouver, ISO, and other styles

29

Fu, Qinghe, Jihuai Tan, Fang Wang, and Xinbao Zhu. "Study on the Synthesis of Castor Oil-Based Plasticizer and the Properties of Plasticized Nitrile Rubber." Polymers 12, no. 11 (2020): 2584. http://dx.doi.org/10.3390/polym12112584.

Full text

Abstract:

A series of new environment-friendly plasticizers was synthesized from castor oil and used to plasticize nitrile rubber (NBR). The test results showed that tensile strength, elongation at break, and tear strength of NBR vulcanizates plasticized by castor oil-based plasticizers were found to be better than that of dioctyl phthalate (DOP). The aging test taken demonstrated that the castor oil-based plasticizers could improve the hot air and oil aging resistance of NBR vulcanizates. The thermal stability test illustrated that castor oil-based plasticizers enhanced the thermal stability of NBR vul

APA, Harvard, Vancouver, ISO, and other styles

30

Curto, Domenico, Vincenzo Franzitta, Andrea Guercio, Miriam Mantegna, and Daniele Milone. "Energy Efficiency in Historic Architecture: The “Ex Institute of Zoology and Comparative Anatomy” in Palermo." Applied Sciences 13, no. 15 (2023): 8882. http://dx.doi.org/10.3390/app13158882.

Full text

Abstract:

In Italy, a large part of the buildings classified as historical–artistic heritage is in a state of degradation and requires urgent interventions. Among the needs, a reduction in the high energy consumption and an improvement of the indoor comfort are mandatory. The case study of the “Ex Institute of Zoology of Palermo” shows how it is possible to achieve a reduction in energy consumption and preserve the building’s historicity through the estimation of energy loads and the subsequent processing. To quantify the energy savings of the structure, it was necessary to follow a few steps, namely an

APA, Harvard, Vancouver, ISO, and other styles

31

Gill, Ashvinder Singh, Kam Huei Wong, Steven Lim, Yean Ling Pang, and Siew Hoong Shuit. "Investigation of Microwave-Assisted Ethanol Pre-Treatment Towards Delignification Efficiency of Oil Palm Empty Fruit Bunch." IOP Conference Series: Earth and Environmental Science 1303, no. 1 (2024): 012004. http://dx.doi.org/10.1088/1755-1315/1303/1/012004.

Full text

Abstract:

Abstract Lignocellulosic biomass (LCB) such as the oil palm empty fruit bunches (OPEFB) has emerged as one of the sustainable alternative renewable bio-resources in retrieving the valuable bioproducts such as lignin, cellulose, and hemicellulose. The natural recalcitrance of LCB by the disarray of lignin is overcome through the combinative application of organosolv pre-treatment followed by microwave irradiation, which helps to break down LCB into its respective components. This physicochemical treatment process was conducted to evaluate the effect of ethanol solvent, microwave power and durat

APA, Harvard, Vancouver, ISO, and other styles

32

Huang, Jiaxin, Cheng Zhang, and Yongqiang Long. "Numerical Investigation of Cooling Characteristics of a Double-sided Composite Impeller with a New Micro Gas Turbine." Journal of Physics: Conference Series 2457, no. 1 (2023): 012015. http://dx.doi.org/10.1088/1742-6596/2457/1/012015.

Full text

Abstract:

Abstract In order to achieve a micro gas turbine engine with higher thermal cycle parameters and higher aerodynamic performance, a double-sided composite impeller has been designed innovatively based on structures combined, thermal cycle process integration, and existing impingement cooling technology with the help of additive manufacturing technology, which is expected to increase the turbine inlet temperature and break the material limit. The double-sided composite impeller is numerically simulated by the method of gas-thermal coupling. The results showed that: First, compared with the turbi

APA, Harvard, Vancouver, ISO, and other styles

33

Kumar, Ashutosh, Hukam Singh, Avnish Kumar Shukla, and Pawan Mishra. "Comparative Analysis of Biodiesel as a Additive with Pure Diesel in Single Cylinder Four Stroke Diesel Engine Processes." International Journal of Advance Research and Innovation 5, no. 1 (2017): 211–16. http://dx.doi.org/10.51976/ijari.511733.

Full text

Abstract:

At present, the demand of energy resources is increasing while their stocks are decreasing with high rate. Bio-diesel is an energy source which is renewable and would help in controlling the demand and supply of fuel but also in the reduction of pollution. Bio-diesel is simple to use and easy to transport. Different ratios of bio-diesel and diesel were mixed to prepare blends which showed viscosity, heat content, density, efficiency closer to diesel. The performance of various blends was tested on four stroke single cylinder compression ignition engine. Testing showed that partial substitution

APA, Harvard, Vancouver, ISO, and other styles

34

Treshcheva, Milana, Irina Anikina, Dmitry Treshchev, and Sergey Skulkin. "Heat Pump Capacity Selection for TPPs with Various Efficiency Levels." Energies 15, no. 12 (2022): 4445. http://dx.doi.org/10.3390/en15124445.

Full text

Abstract:

The variety of possible solutions for the integration of heat pumps (HP) into the circuits of generation facilities dictates the need for preliminary selection of the most promising options. Determining the maximally economically efficient HP capacity may be the key limiting factor for the potential range of solutions. The purpose of the study is to analyze the influence of the type of power equipment of a thermal power plant (TPP) on the choice of HP capacity. In the course of the study, we identified factors that can influence the choice of HP capacity. The correlation between the limitation

APA, Harvard, Vancouver, ISO, and other styles

35

Le Bloa, Gaël, Hugues Somja, and Franck Palas. "Experimental Study on the Seismic Behaviour of an Innovative Hybrid Concrete Connection Used as Thermal Break System." Key Engineering Materials 711 (September 2016): 1019–26. http://dx.doi.org/10.4028/www.scientific.net/kem.711.1019.

Full text

Abstract:

In Europe, the simultaneous introduction of new energy efficiency standards and majored seismic requirements has lead concrete constructors to find innovative solutions. In case of internal insulation, slab to wall connections have to be designed to maintain continuity of the insulation in structural connections while ensuring the transfer of shear forces from the slab to the wall. For this purpose, INGENOVA, a French civil engineering office, has developed a robust and ductile system, called SLABE®: stainless steel Z-shaped profiles are used as shear keys, creating an innovative hybrid concre

APA, Harvard, Vancouver, ISO, and other styles

36

Cwik, Katarzyna, Markus Broström, Krister Backlund, Kenneth Fjäder, Emil Hiljanen, and Matias Eriksson. "Thermal Decrepitation and Thermally-Induced Cracking of Limestone Used in Quicklime Production." Minerals 12, no. 10 (2022): 1197. http://dx.doi.org/10.3390/min12101197.

Full text

Abstract:

To produce quicklime, high calcium carbonate rocks, including limestone, are burned in industrial kilns at 1100–1450 °C. As a consequence of the high temperatures, the carbonate rock can break and decrepitate into fine material, causing operational problems and material losses. In the present paper, an industrial case study on thermal decrepitation was performed on Boda Limestone from the Jutjärn quarry in Dalarna, Sweden. We analyzed 80 limestone samples for thermal decrepitation; furthermore, the correlation with chemical composition was statistically analyzed. The experiments were complemen

APA, Harvard, Vancouver, ISO, and other styles

37

Cui, Jin Feng, Jun Hong Guo, Yong Qiang Ma, et al. "Study of PVC Plasticized by Octodecyl Acyl Tributyl Citrate." Advanced Materials Research 233-235 (May 2011): 2778–84. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2778.

Full text

Abstract:

The PVC composite was prepared by extrusion melt using a new plasticizer octodecyl acyl tributyl citrate and PVC resin. Influence on mechanical and resistance to cold properties of PVC was studied by tensile and low temperature impact tests. The thermal behavior, texture and mechanism of plasticizing of OTBC plastifying PVC were supported by TG, DSC and SEM. The result indicated that the glass transition temperature of plastifying material was about 36°C, breaking strength was 25.3MPa, elongation at break was 250% and, plasicizing efficiency was 0.88, resistance to cold property better than pl

APA, Harvard, Vancouver, ISO, and other styles

38

Jin, Junjie, Peiyao Duan, Yu Liu, Honglin Chen, and Tingting Yu. "Experimental Study on Convection and Heat Conduction Heating of an Air-Conditioned Bed System under Winter Lunch Break Mode." Processes 11, no. 8 (2023): 2391. http://dx.doi.org/10.3390/pr11082391.

Full text

Abstract:

In this paper, an experimental study of a system for heating an air-conditioned bed during a 2 h lunch was carried out. The results show that the power consumption of heat conduction heating was only 0.34 kW·h and that the average heat dissipation was 81.3 W, while the power consumption of convection heating was 1.43 kW·h, accompanied by an average heat dissipation of 748.7 W. Regardless of the power consumption or the heat dissipation, the convection heating was significantly higher than the heat conduction heating. As a result, the room air temperature increased from 12.3 °C to 17.3 °C under

APA, Harvard, Vancouver, ISO, and other styles

39

Akram, Noor, Muhammad Afzaal, Farhan Saeed, et al. "Fabrication and Characterization of PVA–WPI Based Nanofiber Mats for Improved Viability of Lactobacillus rhamnosus GG." Foods 12, no. 21 (2023): 3904. http://dx.doi.org/10.3390/foods12213904.

Full text

Abstract:

In the current study, whey protein-based nanofibers were fabricated to encapsulate Lactobacillus rhamnosus. Purposely, different ratios of PVA (polyvinyl alcohol) and WPI (whey protein isolate) were blended to fabricate nanofibers. Nanofiber mats were characterized in terms of particle size, diameter, tensile strength, elongation at break, and loading efficiency. Morphological and molecular characterizations were carried out using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR). Moreover, in vitro viability under simulated gastrointestinal (GI) conditions and thermal s

APA, Harvard, Vancouver, ISO, and other styles

40

Alamfard, Tannaz, and Cornelia Breitkopf. "Thermo-Mechanical Properties of Cis-1,4-Polyisoprene: Influence of Temperature and Strain Rate on Mechanical Properties by Molecular Dynamic Simulations." Polymers 17, no. 9 (2025): 1179. https://doi.org/10.3390/polym17091179.

Full text

Abstract:

Cis-1,4-polyisoprene is a widely used elastomer that demonstrates particular thermal and mechanical characteristics, in which the latter is influenced by temperature and strain rate. Molecular dynamic simulations were used to obtain thermal conductivities, glass transition temperatures (Tg), and tensile deformation. Thermal conductivities were calculated by applying the Green–Kubo method, and a decrease in thermal conductivity was observed with increasing temperature. Density–temperature relations were used to calculate Tg, which indicates the transition from the glassy to the rubbery state of

APA, Harvard, Vancouver, ISO, and other styles

41

Mao, Haiyan, Qun Zhang, Ling Lin, Xuemei He, and Lili Wang. "A Self-Healable and Recyclable Zwitterionic Polyurethane Based on Dynamic Ionic Interactions." Polymers 15, no. 5 (2023): 1270. http://dx.doi.org/10.3390/polym15051270.

Full text

Abstract:

Polyurethanes with self-healing and reprocessing capabilities are promising in eco-friendly applications. Here, a self-healable and recyclable zwitterionic polyurethane (ZPU) was developed by introducing ionic bonds between protonated ammonium groups and sulfonic acid moieties. The structure of the synthesized ZPU was characterized by FTIR and XPS. The thermal, mechanical, self-healing and recyclable properties of ZPU were also investigated in detail. Compared with cationic polyurethane (CPU), ZPU shows similar thermal stability. The physical cross-linking network formed between zwitterion gro

APA, Harvard, Vancouver, ISO, and other styles

42

Nguyen Thi Ngoc, Anh, Quyet Phan Minh, Nam Vu Trung, et al. "Preparation of graft copolymers from Vietnam deproteinized natural rubber with acrylonitrile using tetraethylenepentamine and tert-butyl hydroperoxide radical initiators." Vietnam Journal of Science and Technology 63, no. 1 (2025): 40–51. https://doi.org/10.15625/2525-2518/18494.

Full text

Abstract:

Natural rubber is an unsaturated natural elastomer with many superior properties such as high strength, outstanding resilience, and high elongation at break. However, it lacks in some properties due to the unsaturation of carbon-carbon double bonds in the natural rubber backbone causes easy degradation and poor thermal stability. Many techniques have been made use of improving its thermo-mechanical properties. In this study, the graft copolymerization of acrylonitrile onto deproteinization natural rubber was investigated to increase the thermal and mechanical properties of natural rubber. This

APA, Harvard, Vancouver, ISO, and other styles

43

Xie, Ying, Jinpeng Guo, Peng Chen, and Zhiwei Li. "Coupled Fluid-Thermal Analysis for Induction Motors with Broken Bars Operating under the Rated Load." Energies 11, no. 8 (2018): 2024. http://dx.doi.org/10.3390/en11082024.

Full text

Abstract:

Thermal stress of the rotor in a squirrel cage induction motor is generated due to the temperature rise, it is also one of the factors causing the broken bar fault because the structure of the rotor would be destroyed if the stress of the rotor bars exceed the strength limit. The coupled fluid-thermal analysis for the induction motor with healthy and broken bar rotors is performed in this paper. Much concern has been committed to establishment of the fluid model on the basis of computational fluid dynamic (CFD) theory. The heat field of the prototypes is analysed so that the effect of the asym

APA, Harvard, Vancouver, ISO, and other styles

44

Linke, Heiner. "Quantum Dots and Molecular Junctions as Energy Filters for Thermal-to-Electric Energy Conversion." ECS Meeting Abstracts MA2024-01, no. 14 (2024): 1127. http://dx.doi.org/10.1149/ma2024-01141127mtgabs.

Full text

Abstract:

The thermoelectric conversion of heat into electricity requires a form of energy filtering, that allows hot electrons to pass while blocking cold electrons. The energy conversion efficiency is determined by the details of the energy filtering, with an infinitely sharp (delta function) transmission spectrum allowing near ideal (Carnot) efficiency. [1] I will introduce this concept and report on a proof-of-performance experiment based on a quantum dot embedded into a single, semiconductor nanowire. This near-ideal quantum-dot heat engine realized power production at maximum power with Curzon-Ahl

APA, Harvard, Vancouver, ISO, and other styles

45

Somanath, Swamy R. H. M., Yerrennagoudar Hiregoudar, and G. Mahesh. "Performance and Emission Characteristics of CI Engine with Modification in Fuel Injector." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 3 (2020): 1604–7. https://doi.org/10.35940/ijeat.C5261.029320.

Full text

Abstract:

Work has been carried out using four stroke single cylinder diesel engine with retrofit attached with fuel injector and at optimum injection pressure 210 bar and 230 BTDC. The main purpose of using retrofit is to achieve HCCI (Homogeneous charge compression ignition) with which emissions can be reduced. Four Variants of retrofits were used and with V-cut type retrofit it was found that there is reduction in toxic emission like CO and NO but there was slight increase in HC emission when compared with normal fuel injector. Engine performance was compared with normal injector and injector with V-

APA, Harvard, Vancouver, ISO, and other styles

46

Dimapalao, Muhamad-Ali, and Napoleon Enteria. "MATHEMATICAL MODELLING, NUMERICAL SIMULATION AND PARAMETRIC INVESTIGATION OF TRI-COLORED SOLAR THERMAL FLAT-PLATE COLLECTORS FOR TROPICAL CLIMATE." ASEAN Engineering Journal 15, no. 1 (2025): 25–40. https://doi.org/10.11113/aej.v15.22415.

Full text

Abstract:

The use of non-renewable energy, especially petroleum, has cascading effects that led to the adoption of renewable energy, especially solar energy. One method of using solar energy is through the use of Solar Flat-Plate Collectors (SFPC). Flat-plate solar thermal collectors are often black in appearance due to the hue of the absorbing material, which is used to enhance solar spectrum collection. However, 85% of architects prefer non-black solar collectors, irrespective of their effects on the performance of the system. This study considers the effects of tri-colored SFPC as compared with the b

APA, Harvard, Vancouver, ISO, and other styles

47

Derii, V. O. "Economic efficiency of district heating systems’ heat generation technologies." Problems of General Energy 2021, no. 2 (2021): 21–27. http://dx.doi.org/10.15407/pge2021.02.021.

Full text

Abstract:

A new selection criterion of heat-generating technologies for the district heating systems (DHS) retrofit, Marginal Levelized Price of Energy (MLPOE), is proposed. MLPOE is the minimum weighted marginal price of thermal energy produced by the technological unit. MLPOE accounts for the costs and incomes of considered heat generation technologies and allows more accurate comparison among technologies that produce only one type of energy with multi-product technologies, e.g. cogeneration technologies and technologies that provide ancillary services to power systems in addition to only heat produc

APA, Harvard, Vancouver, ISO, and other styles

48

Hamilton, Brenden W., and Timothy C. Germann. "Energy localization efficiency in 1,3,5-trinitro-2,4,6-triaminobenzene pore collapse mechanisms." Journal of Applied Physics 133, no. 3 (2023): 035901. http://dx.doi.org/10.1063/5.0133983.

Full text

Abstract:

Atomistic and continuum scale modeling efforts have shown that the shock-induced collapse of porosity can occur via a wide range of mechanisms dependent on pore morphology, the shockwave pressure, and material properties. The mechanisms that occur under weaker shocks tend to be more efficient at localizing thermal energy but do not result in high, absolute temperatures or spatially large localizations compared to mechanisms found under strong shock conditions. However, the energetic material 1,3,5-trinitro-2,4,6-triaminobenzene (TATB) undergoes a wide range of collapse mechanisms that are not

APA, Harvard, Vancouver, ISO, and other styles

49

MHUMAK, Chutikan, and Chiravoot PECHYEN. "Development and Characterization of Polypropylene/Polyethylene Vinyl Acetate/Micro Cellulose Trays as a Prototype for Chilled Food Packaging Application." Walailak Journal of Science and Technology (WJST) 15, no. 11 (2018): 765–77. http://dx.doi.org/10.48048/wjst.2018.5967.

Full text

Abstract:

Cellulose and polypropylene (PP) were successfully designed as a composite material. To obtain higher efficiency, ethylene vinyl acetate (EVA) with vinyl acetate (VA) content 28 % was integrated as a coupling agent. The presence of EVA improved the composite compatibility and polypropylene matrix toughness under low temperatures. The composite was compounded by twin screw extrusion (TSE) with 30 part of EVA per hundred parts of resin (phr) and varying ratios of cellulose 5, 10, 20 and 30 phr, respectively. The effects of cellulose and EVA on properties of the composite were investigated. Therm

APA, Harvard, Vancouver, ISO, and other styles

50

Hadad, Yakir, Jason C. Soric, and Andrea Alu. "Breaking temporal symmetries for emission and absorption." Proceedings of the National Academy of Sciences 113, no. 13 (2016): 3471–75. http://dx.doi.org/10.1073/pnas.1517363113.

Full text

Abstract:

Time-reversal symmetries impose stringent constraints on emission and absorption. Antennas, from radiofrequencies to optics, are bound to transmit and receive signals equally well from the same direction, making a directive antenna prone to receive echoes and reflections. Similarly, in thermodynamics Kirchhoff’s law dictates that the absorptivity and emissivity are bound to be equal in reciprocal systems at equilibrium, e(ω,θ)=a(ω,θ), with important consequences for thermal management and energy applications. This bound requires that a good absorber emits a portion of the absorbed energy back

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!