Experimental and numerical study on performance of hybrid refrigeration system that combines vapor compression and thermoelectric systems

2021 ◽  
pp. 117107
Author(s):  
R.P. Fu ◽  
Z.G. Qu ◽  
W.Q. Tao ◽  
X.B. Zhu ◽  
J.R. Liu
Keyword(s):  
Numerical Study ◽  
Vapor Compression ◽  
Refrigeration System ◽  
Thermoelectric Systems

EXERGETIC ANALYSIS AND ASSESSMENT OF HYBRID REFRIGERATION SYSTEM FOR DAIRY APPLICATIONS

2014 ◽  
Vol 22 (04) ◽  
pp. 1450021 ◽  
Author(s):  
S. ANAND ◽  
A. GUPTA ◽  
S. K. TYAGI
Keyword(s):  
Numerical Study ◽  
Exergy Loss ◽  
Cattle Dung ◽  
Vapor Compression ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Exergetic Analysis ◽  
Absorption Refrigeration System ◽  
The Cost ◽  
Work Done

The application of biogas powered refrigeration system is being studied because of many folds increase in the cost of conventional fuels. This paper presents a numerical study of biogas operated ammonia–water hybrid vapor compression absorption refrigeration system for onsite dairy cooling applications. This system involves the compressor between the generator and condenser and use biogas (generated from the cattle dung) fired boiler to heat water which acts as an energy source for generator in the hybrid system. The variation of performance parameters such as heat load of different components, exergy loss, COPcooling, COPheating and exergy efficiency are studied with varying generator temperature. The results indicate that COPcooling as well COPheating values are in the range of 0.1125–0.2159 and 1.112–1.169, respectively, for the same variation in the generator temperature from 65°C to 130°C. The work done by the compressor is also calculated and found to be decreasing with an increase in the condenser, evaporator and generator temperature. The effect of the ambient temperature on the exergy loss in different components is also studied in the analysis and the results revealed that the maximum exergy loss is found in the generator and it is found to be the lowest in compressor.

scholarly journals New HFC/HFO Blends as Refrigerants for the Vapor-Compression Refrigeration System (VCRS)

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 946
Author(s):  
Bartosz Gil ◽  
Anna Szczepanowska ◽  
Sabina Rosiek
Keyword(s):  
Global Warming ◽  
Global Warming Potential ◽  
Mass Fraction ◽  
Vapor Compression ◽  
Refrigeration System ◽  
Operational Parameters ◽  
Vapor Compression Refrigeration ◽  
Low Global Warming Potential ◽  
Triangular Design

In this work, which is related to the current European Parliament Regulation on restrictions affecting refrigeration, four new three-component refrigerants have been proposed; all were created using low Global Warming Potential(GWP) synthetic and natural refrigerants. The considered mixtures consisted of R32, R41, R161, R152a, R1234ze (E), R1234yf, R1243zf, and RE170. These mixtures were theoretically tested with a 10% step in mass fraction using a triangular design. The analysis covered two theoretical cooling cycles at evaporating temperatures of 0 and −30 °C, and a 30 °C constant condensing temperature. The final stage of the work was the determination of the best mixture compositions by thermodynamic and operational parameters. R1234yf–R152a–RE170 with a weight share of 0.1/0.5/0.4 was determined to be the optimal mixture for potentially replacing the existing refrigerants.

scholarly journals Application of the heat pipe to enhance the performance of the vapor compression refrigeration system

2019 ◽  
Vol 15 ◽  
pp. 100531 ◽  
Author(s):  
Santiphap Nakkaew ◽  
Thunyawat Chitipalungsri ◽  
Ho Seon Ahn ◽  
Dong-Wook Jerng ◽  
Lazarus Godson Asirvatham ◽  
...  
Keyword(s):  
Heat Pipe ◽  
Vapor Compression ◽  
Refrigeration System ◽  
Vapor Compression Refrigeration
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