Results 31 to 40 of about 765 (158)

PREDICTION OF THE USE OF REFRIGERANTS IN LOW-TEMPERATURE EQUIPMENT

Вестник Дагестанского государственного технического университета: Технические науки, 2019
Objectives Determination of prospects for the use of various refrigerants, as well as the potential for their interchangeability in low-temperature equipment in accordance with the conditions of the Kigali Amendment to the Montreal Protocol on substances
J. V. Tatarenko, V. M. Mizin, N. O. Rachkovskiy   +2 more
doaj   +1 more source

Binary hydrocarbon mixtures of Joule-Thomson refrigeration cycle based for -70 C freezer: Theoretical and experimental evaluation

Case Studies in Thermal Engineering
Recently, with the increasing worldwide demand for low-temperature freezers, applying natural working medium hydrocarbon refrigerants has been widely concerned.
Lingeng Zou, Tao Bai, Shuo Guo, Jianlin Yu   +3 more
doaj   +1 more source

Enhancing Semiconductor Chiller Performance: Investigating the Performance Characteristics of Ultra-Low-Temperature Chillers Applying a Liquid Receiver

Energies
This study investigates the implementation of a cryogenic chiller utilizing a mixed-refrigerant cascade refrigeration cycle (MRCRC). In this setup, R-404A is employed in the high-temperature circuit (HTC), while a mixture of refrigerants is utilized in ...
Joon-Hyuk Lee, Hye-In Jung, Su-Been Lee, Chang-Hyo Son   +3 more
doaj   +1 more source

Experimental Study of HFO-1234ze and HFC-32 Mixture on Heat Pump Water Heater

Zhileng xuebao, 2016
Based on REFPRO 9.0 and KW2 model parameters, the thermophysical properties of mixing refrigerant HFO-1234ze/HFC-32 were calculated in this paper, and the cycle performance of mixed refrigerant in different ratios was figured out according to the heat ...
Chen Hongqun, Wang Fang, Ou Junyan, Wang Tao, Yu Dawei, Wang Ying   +5 more
doaj  

A Study on New Refrigerant R1234ze(E) and Its Mixtures

Zhileng xuebao, 2015
Over the past few years, more attention have been paid to the new low GWP refrigerant R1234ze(E), as a kind of ideal alternative of R134a. But, thermodynamic property and transfer characteristic are not good enough.
Qiu Jinyou, Zhang Hua, Qi Yingxia, Wang Xi, Yu Xiaoming   +4 more
doaj  

The adsorption and desorption processes of organic working fluids R1234yf, R134a, R32 in MOF-5 and Co-MOF-74: a molecular simulation study

Frontiers in Energy Research
The combination of nanoporous materials with organic working fluids holds the promise of further enhancing the performance of refrigerants based thermodynamics cycles.
Xinping Chen
doaj   +1 more source

Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14

Zhileng xuebao, 2018
The excess Gibbs free energy-equation of state "(" "G" ^"E" "-EoS) " is a new method for predicting the vapor liquid equilibrium (VLE) with respect to the equation of state (EoS) and activity coefficient method.
Qin Yanbin, Zhang Hua, Meng Zhaofeng, Zhou Guoliang   +3 more
doaj  

Viscosity Measurements and Modeling for R32 and Binary Mixture of R32/R1234yf

Zhileng xuebao, 2018
Recently, the Paris Agreement which many nations agreed to limit greenhouse gas emissions, has come into effect. According to the agreement, many of the compounds currently used in the refrigeration sector are scheduled for phase out due to ozone ...
Meng Xianyang, Sun Yukun, Cao Fali, Wen Chenyang, Wu Jiangtao   +4 more
doaj  

A Novel Approach of −80 °C Cascade Refrigeration System Using Non-Flammable Quaternary Refrigerants for Semiconductor Process Applications

Energies
Ultra-low temperature chillers have seen increasing demand with the advancement of semiconductor technology. Mixed refrigerant (MR) cascade refrigeration systems (CRSs) are widely utilized for their stability and high cooling performance at low ...
Su-Been Lee, Chang-Hyo Son, Joon-Hyuk Lee   +2 more
doaj   +1 more source

Investigation of Inlet Guide Vane Efficiency in Centrifugal Compressors for the Turbo Refrigeration Machines [PDF]

Problems of the Regional Energetics
The article investigates the influence of geometric parameters of inlet guide vanes (IGVs), including blade profiling and design features, on their operational efficiency.
Danilishin A.M., Kozhukhov Y. V., Fateeva E.S., Aksenov A.A.   +3 more
doaj   +1 more source