Results 51 to 60 of about 739 (173)
Design of heat pump system for a railway train’s cabin applications utilizing R744 and R290
International Journal of Air-Conditioning and RefrigerationAmong 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
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Broadband Receiver for VLF On‐Orbit Wave‐Particle Interaction Experiments
Journal of Geophysical Research: Space Physics, Volume 130, Issue 3, March 2025.Abstract A broadband, multi‐channel Very Low Frequency (VLF) radio receiver (BBR), developed as a sensitive analog, vector wave receiver for whistler‐mode signals in the VLF range, was successfully flown on the Air Force Demonstration Science Experiment (DSX) Mission to Mid‐Earth Orbit (Johnston et al., 2023, https://doi.org/10.1029/2022JA030771).
I. R. Linscott +12 more
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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 +3 more
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Chemie Ingenieur Technik, Volume 97, Issue 1-2, Page 43-50, February 2025.An enhanced tube which is optimized for pool boiling was examined with the refrigerants R134a, R1234ze(E), and propane. The measured heat transfer coefficient is compared to literature‐based correlations and also the transferability. For a better prediction of the shell‐side heat transfer coefficient a new correlation is proposed.
Marco Möhrle +3 more
wiley +1 more source
Performance Investigation of R290 As A Substitute to R22 Refrigeration System
, 2021 In this study, Use of natural refrigerant R290 can play a vital role in fulfilling the objectives of the international protocols like Montreal and Kyoto. Because of environmental issues such as ozone depletion and global warming, R22 needs to be phased out on urgent basis.
Pawan Kumar Kashyap +3 more
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The effect of system parameters on the condensation performance of heat pump system using r290
Journal of Thermal Engineering, 2018 Since global warming has reached critical levels, limitations have been placed on the use of certain fluoride-containing refrigerants by F-Gas regulations.
S. Hocaoglu, D.B. Ozkan
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Research on the Flammability Limits of R1234yf/R290 and R1234ze(E)/R290 Mixtures
Zhileng xuebaoPropane (R290) is a potential refrigerant substitute for household air conditioners. However, its flammability limits its application. In this study, the flammability limits of R290, 2,3,3,3-tetrafluoropropene (R1234yf), trans-1,3,3,3-tetrafluoropropene (
Shen Jun +5 more
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ESTUDO TERMODINÂMICO DA APLICAÇÃO DE HIDROCARBONETOS EM SISTEMA DE REFRIGERAÇÃO
Holos, 2010 Os esforços de pesquisa e desenvolvimento na área de Refrigeração e Ar-Condicionado aplicados ao uso de fluidos refrigerantes naturais não esta associada somente à necessidade de preservação do meio-ambiente em si, mas também apresenta grande importância
Jucélio Gomes da Silva +3 more
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Prosiding Industrial Research Workshop and National SeminarHidrokarbon merupakan refrigeran alami yang memiliki dampak lingkungan yang jauh lebih rendah dibandingkan refrigeran hydrochlorofluorocarbons (HCFC) dan hydrofluorocarbon (HFC). Penggunaan R290 sebagai refrigeran alternatif dan ramah lingkungan dilakukan karena memiliki nilai ozone depletion potential (ODP) nol dan global warming potential (GWP) yang ...
Sandy Karan +2 more
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Zhileng xuebaoBecause the driving method of electric vehicles differs from that of conventional ones， the power sources of electric vehicles can be diversified. The Global Warming Potential （GWP） and ozone depletion potential （ODP） values of the refrigerant R290 are ...
Chen Jianhong +5 more
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