Results 11 to 20 of about 167,172,128 (305)
Illustrating the relationship between the coefficient of performance and the coefficient of system performance by means of an R404 supermarket refrigeration system [PDF]
International Journal of Refrigeration, 2016 Because the coefficient of performance (COP) is primarily concerned with the core refrigeration system, using it for optimisation purposes may lead to higher than necessary energy consumption. This hypothesis was studied with a simple equation relating this coefficient to the coefficient of system performance (COSP), and with a software model based on ...
Braun, M.R., Walton, P., Beck, S.B.M.
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Heating Performance of Solar Heat Pump Heating System With Aluminum Tube Collector
IEEE Access, 2021 A solar heat pump heating system with an aluminum tubular collector is proposed in this paper. Mathematical models are established for solar energy absorption and air energy absorption of the aluminum tubular collector, as well as the heat-absorption ...
Wu Zhenkui +6 more
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International Journal for Simulation and Multidisciplinary Design Optimization, 2020 By setting two vortex tubes in hot cascade type Vortex tube manner, can achieve two cooling points for spot cooling applications with the single input. These cooling points play a vital role to cool tools in machining operations. The present work aims to
Madhu Kumar Racharla +2 more
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Relationships for Nozzle Performance Coefficients [PDF]
Volume 1B: Gas Turbines, 1979 The relationships between the performance coefficients for flow, kinetic energy, and thrust are developed for the irreversible adiabatic flow through a choked nozzle. The basis of the development is maximum flowrate per unit area and an exit pressure greater than or equal to the exhaust pressure.
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Quantum Otto refrigerators in finite-time cycle period
New Journal of Physics, 2021 Finite-time cycle period for a quantum Otto machine implies that either an adiabatic stroke or an isochoric process proceeds in finite time duration. The quantum Otto refrigerators under consideration consist of two adiabatic strokes, where the system ...
Guangqian Jiao +4 more
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Theoretical assessment of the effectiveness of application single-stage long-stroke piston compressors in refrigeration and hydrocarbon gas liquefaction systems [PDF]
Омский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение"The analysis of the main modern technologies for obtaining low temperatures and liquefying hydrocarbons using compressor equipment is presented and the most significant results of research in the field of low-flow compressors based on low-speed, long ...
V. L. Yusha
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Analysis of Performance of Cavitation Models with Analytically Calculated Coefficients [PDF]
Energies, 2021 Cavitation is often simulated using a mixture model, which considers the transport of an active scalar, namely the vapor fraction αv. Source and sink terms of the transport equation of αv, namely vaporization and condensation terms, rule the dynamics of the cavity and are described through different models.
Andrea Savio +2 more
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Mokslas: Lietuvos Ateitis, 2015 Heat pump systems are promising technologies for current and future buildings and this research presents the performance of air source heat pump (ASHP) system. The system was monitored, analysed and simulated using TRNSYS software.
Karolis Januševičius +1 more
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, 2016 Book of Abstracts: 11th World Congress of Performance Analysis of Sport, 16-18 November 2016. International Society of Performance Analysis of Sport.
ARIO FEDERICI +9 more
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A Numerical Study on System Performance of Groundwater Heat Pumps
Energies, 2015 Groundwater heat pumps have energy saving potential where the groundwater resources are sufficient. System Coefficients of Performance (COPs) are measurements of performance of groundwater heat pump systems.
Jin Sang Kim, Yujin Nam
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