Results 61 to 70 of about 5,061 (219)

Performance Study and Optimization on Alternative Refrigerant R290 in R22 Low Temperature Heat Pump System

Zhileng xuebao, 2019
This study addresses the experimental performance of the alternative refrigerant R290 in the R22 low-temperature heat pump system. Results show that when R22 was directly replaced by R290 in the original system, both the heat exchange and coefficient of ...
Zhang Yun, Liu Cichong, Chen Xiaoning, Li Dawei, Shi Junru, Chen Jiangping   +5 more
doaj  

Performance Investigation of a Cabin Thermal Management System for Electric Vehicles Based on R290 Refrigerant

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
Electric vehicle (EV) thermal management systems (TMSs) face a critical challenge in adopting environmentally friendly refrigerants, essential for adaptability, thermal safety, driving range optimization, and passenger comfort across wide temperature ranges.
Jiahao Zhao, Zihao Luo, Yifei Zhang, Abubakar Unguwanrimi Yakubu, Xuanhong Ye, Qi Jiang, Shusheng Xiong, Chenbo Xia, Geng Chen   +8 more
wiley   +1 more source

A study of working fluids for heat driven ejector refrigeration using lumped parameter models [PDF]

, 2015
This paper studies the influence of working fluids over the performance of heat driven ejector refrigeration systems performance by using a lumped parameter model.
Besagni, Giorgio, Di Leo, Giuseppe, Inzoli, Fabio, Mereu, Riccardo   +3 more
core   +1 more source

Enhanced Heat Transfer Performance of Vapor Compression Refrigeration Systems Using Silver Nanoparticles

Journal of Nanotechnology, Volume 2025, Issue 1, 2025.
This novel work shows the experimental analysis of the use of silver nanoparticles (AgNPs) and their effect on the vapor compression refrigeration system (VCRS) performance. AgNPs were synthesized and confirmed through X‐ray diffraction (XRD) and scanning electron microscopy (SEM) and then introduced to the VCRS.
Fakhre Alam Khan, Hamad Aftab, Ahmed Khan, Haris A. B. Ashraf, Muhammad Bilal Ghouri, Zahid Ullah, Nicola Curreli   +6 more
wiley   +1 more source

Charge Reduction and Performance Analysis of a Heat Pump Water Heater Using R290 as a Refrigerant—A Field Study

Energies
Heat pump water heaters (HPWHs) are a proven technology for water heating that has been commercialized. The adoption of HPWHs for domestic and commercial water heating is growing rapidly because of their superior performance compared with alternative ...
Ahmed Elatar, Joseph Rendall, Jian Sun, Jamieson Brechtl, Kashif Nawaz   +4 more
doaj   +1 more source

Non-equilibrium steady state of sparse systems

, 2011
A resistor-network picture of transitions is appropriate for the study of energy absorption by weakly chaotic or weakly interacting driven systems. Such "sparse" systems reach a novel non-equilibrium steady state (NESS) once coupled to a bath.
Cohen D., Crisanti A., D. Cohen, D. Hurowitz, Robbins J. M., Stotland A., Stotland A., Stotland A., Wilkinson M., Wilkinson M.   +9 more
core   +1 more source

From the wetlands to the farmyard: Osteometric approach to the presence of domestic geese and ducks in Zuid Holland, 150–1700 AD

International Journal of Osteoarchaeology, Volume 34, Issue 6, November/December 2024.
Abstract The history of domestic ducks (Anas platyrhynchos domesticus) and domestic greylag geese (Anser anser domesticus) remains poorly understood. This is mainly caused by the difficulty of identifying archaeological bones as domestic due to the existing overlap in sizes.
Noé de Segovia de Kraker, Laura Llorente‐Rodríguez   +1 more
wiley   +1 more source

Analysis and Comparison of the Refrigeration Cycle Performance of R290 Direct Contact Condensation

Zhileng xuebao, 2018
In the study, thermal performances of direct contact condensation refrigeration cycle with R290 were analyzed and compared with conventional one stage compression refrigeration cycle with R290. The following conclusions are obtained.
Ning Jinghong, Zhu Kai, Liu Shengchun, Dong Qiang   +3 more
doaj  

Design of heat pump system for a railway train’s cabin applications utilizing R744 and R290

International Journal of Air-Conditioning and Refrigeration
Among greenhouse gases, R-134a, commonly used in train HVAC systems, has a high global warming potential (GWP) of 1430. Korea is required to reduce R-134a usage by 80% by 2045, necessitating the development of eco-friendly alternatives.
Minji Kwon, Rin Yun, Hisuk Kim
doaj   +1 more source

The Role of the Sympathetic Nervous System in the Hypothermic Effect of d-Fenfluramine [PDF]

, 2002
Experiments in this dissertation were conducted to characterize the effects of d-fenfluramine on body temperature and the mechanisms by which d-fenfluramine alter body temperature.
Subramanian, Srividya
core   +1 more source