Results 61 to 70 of about 271 (169)

Comparison of the Thermodynamic Performance and Total Equivalent Warming Impacts of Various Refrigerants Alternative to R134a in Automobile Air Conditioning Systems for Cooling Mode Operations

International Journal of Automotive Science and Technology
The variations of significant energetic and exergetic performance parameters of automobile air conditioning systems operated in cooling mode for refrigerants R1234yf, R1234ze(e), R152a, R430A and R440A, which can be used as alternatives to R134a, were ...
Murat Hoşöz, Eren Kabak
doaj   +1 more source

Thermodynamic Optimization of Advanced Organic Rankine Cycle Configurations for Geothermal Energy Applications

Energies, 2022
The Organic Rankine Cycle (ORC) is commonly accepted as a viable technology to convert from low to medium temperature geothermal energy into electrical energy.
Nenad Mustapić, Vladislav Brkić, Željko Duić, Toni Kralj   +3 more
doaj   +1 more source

Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas Bearings

Zhileng xuebao, 2023
Motor cooling is key to the reliable operation of centrifugal refrigeration compressors with gas bearings. A mathematical model of a centrifugal refrigeration compressor with gas bearings was devised, and the influences of different refrigerants on the ...
Liu Yiteng, Gao Yiming, Liu Guangbin, Song Junnan, Gong Jieming   +4 more
doaj  

Investigation of Frictional Pressure Drop During Flow Boiling of R1234ze(E) in Horizontal Tub

Zhileng xuebao, 2016
Recently, more attention have been paid to the new refrigerant R1234ze(E), which is supposed to be the most promising alternative of R134a in heat pump system. In this paper, the saturated flow boiling frictional pressure drops characteristics of R1234ze(
Qiu Jinyou, Zhang Hua, Yu Xiaoming, Qi Yingxia, Wang Xi, Liu Zhanjie   +5 more
doaj  

Theoretical and experimental study on pumping characteristics of low-GWP refrigerants in solar ejector cooling system

International Journal of Air-Conditioning and Refrigeration
This study evaluates two low-global warming potential (low-GWP) refrigerants—R1233zd(E) and R1234ze(Z)—for use in solar ejector refrigeration systems. A steady-state thermodynamic model is developed to compare their performance with baseline R134a across
Zhao Cheng-ming, Wang Jia-bin, Fan Xiao-wei, Tian Guo-ji, Zheng Hui-fan   +4 more
doaj   +1 more source

Study of a Novel Hybrid Refrigeration System, with Natural Refrigerants and Ultra-Low Carbon Emissions, for Air Conditioning

Energies
Due to its environmental benefits, CO2 shows great potential in refrigeration systems. However, a basic CO2 transcritical (BCT) refrigeration system used for airconditioning in buildings might generate massive indirect carbon emissions for its low COP ...
Yijian He, Yufu Zheng, Jianguang Zhao, Qifei Chen, Lunyuan Zhang   +4 more
doaj   +1 more source

SLE for the carbon dioxide +trans-1,3,3,3-tetrafluoropropene

MATEC Web of Conferences, 2013
A built experimental set-up was employed for the estimation of the solid-liquid equilibria of alternative refrigerants systems. The behavior of carbon dioxide + 1,3,3,3-tetrafluoropropene (CO2 + R1234ze(E)) was measured down to temperatures of 160.0 K ...
Di Nicola G., Cacciatore I., Pierantozzi M., Arteconi A.   +3 more
doaj   +1 more source

Summer period analysis of the rotary desiccant - hybrid cooling system combined with solid oxide fuel cells using human waste fuel

Cleaner Engineering and Technology
This paper proposes and simulates a desiccant air cooling system integrated with a vapor compression cooling unit and a heat recovery unit for an office building in Çanakkale, Turkey, during the summer season. The required electrical energy for equipment
Kamil Neyfel Çerçi, Ivo Rafael Oliveira Silva, Önder Kaşka, Kamel Hooman   +3 more
doaj   +1 more source

A Dual-Path Pulse-Echo Instrument for Liquid-Phase Speed of Sound and Measurements on p-Xylene and Four Halogenated-Olefin Refrigerants [R1234yf, R1234ze(E), R1233zd(E), and R1336mzz(Z)]. [PDF]

Ind Eng Chem Res, 2023
McLinden MO, Perkins RA.
europepmc   +1 more source

Measurement of local condensation heat transfer coefficient (HTC) within a brazed plate heat exchanger (BPHE) and heat transfer assessment of low-GWP R134a replacements

Case Studies in Thermal Engineering
This paper presents local condensation Heat Transfer Coefficients (HTCs) and temperature profiles of R134a and three low-GWP replacements, R1234yf, R1234ze(E), and R152a, within Brazed Plate Heat Exchangers (BPHEs).
Giovanni A. Longo, Claudio Zilio
doaj   +1 more source