Results 1 to 10 of about 5,916 (264)

Research on Leakage Safety of Split-type Air-Conditioner Using R290 Based on Product Development

open access: yesZhileng xuebao
R290 is an environmentally friendly Refrigerant, but it has flammable characteristics, making it difficult to be widely used. From the perspective of product development, aiming at the safety problem of refrigerant leakage of split-type air-conditioner ...
LAI Xiaocheng   +5 more
doaj  

Experimental Study on a Miniature Refrigeration System for Electronics Cooling

open access: yesZhileng xuebao, 2014
With the improvement of electronics performance, the problem of heat dissipation in circuit and chip is becoming more serious, development of high-efficiency electronics cooling systems is urgently needed, and vapor compression refrigeration is believed ...
Liu Gang   +4 more
doaj  

Optimizing Low-Temperature Three-Circuit Evaporative Cooling System for an Electric Motor by Using Refrigerants

open access: yesEnergies
This article presents modeling results and a comprehensive analysis of evaporative cooling systems designed for electric motors using the refrigerants R744 (trans-critical), R134a, R600a, and R290.
Dmytro Konovalov   +5 more
doaj   +1 more source

Modeling and Optimization of a Refrigeration System for Metro Train Air-conditioning

open access: yesZhileng xuebao, 2014
Though metro in China today is booming, the typical refrigeration system for metro train air-conditioning is at quite lower energy efficiency level (COP = 2.2-2.3) in comparison with the residential systems under the same operating conditions.
Yang Liang, Gao Jie, Zhang Chunlu
doaj  

Study on Thermomagnetic Convection Characteristics of a Cooling Device Using Magnetic Nano-refrigerant

open access: yesZhileng xuebao, 2014
The experimental system of a cooling device using Fe3O4-R600a as magnetic nano-refrigerant was built up. And the influences of magnetic field distribution, magnetic field intensity, heat load, cooling temperature were discussed. The results show that the
Wu Zhijiang, Yin Shaoyou
doaj  

Heat transfer Characteristics for Condensation of R1234ze in a Horizontal Small Tube

open access: yesZhileng xuebao, 2014
The condensation heat transfer coefficients of R1234ze in a single circular minitube of 2mm inner diameter were investigated experimentally. The experiment are conducted at saturation temperature of 35 ℃ and 40 ℃, mass flux of 100~400 kg/(m2?s) and heat ...
Li Minxia   +3 more
doaj  

Waste Heat Recovery in the Energy-Saving Technology of Stretch Film Production

open access: yesEnergies
The stretch film production is highly energy intensive. The components of the technological line are powered by electrical energy, and the heat is used to change the physical state of the raw material (granules).
Krzysztof Górnicki   +2 more
doaj   +1 more source

Numerical Simulation of Phase Change Cold Storage Heat Exchanger for Liquid Hydrogen Cold Chain Logistics Vehicle

open access: yesZhileng xuebao
A coaxial spiral tube heat exchanger used for phase change cold storage of liquid hydrogen cold chain logistics vehicles is proposed. The three-dimensional heat flow coupling numerical analysis model of the heat exchanger is established. The influence of
ZU Binjie, LIAO Quan, GAN Junyi
doaj  

Thermodynamic, Exergy, and DFT-Based QTAIM Analysis of R452A Refrigerant: A Multiscale Molecular–System Approach

open access: yesMolecules
In this study, the R452A refrigerant used in refrigerated trucks is investigated through a multiscale approach combining thermodynamic and molecular-level analyses.
Hacer Gümüş   +2 more
doaj   +1 more source

Gd‐based molecular coolants: Aggregating for better magnetocaloric effect

open access: yesAggregate
Two series of 3d‐Gd mixed‐metal phosphonate complexes with either only two gadolinium centers such as {Gd2}, {Ni2Gd2}, {Co4Gd2}, {Co8Gd2}, {Fe6Gd2}, and {Fe17Gd2} or more than two gadoliniums such as {Co8Gd4}, {Mn8Gd4}, {Co4Gd6}, {Mn4Gd6}, {Co6Gd8 ...
Yuan‐Qi Zhai   +4 more
doaj   +1 more source

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