scholarly journals Feasibility study on using evaporator condensate to subcool refrigerant in a vapor-compression refrigeration system

2018 ◽  
Vol 192 ◽  
pp. 03055
Author(s):  
Kiattisak Roonprasang ◽  
Eakasit Sritham
Keyword(s):  
Computer Simulation ◽  
Feasibility Study ◽  
Model System ◽  
Vapor Compression ◽  
Refrigeration System ◽  
Compression Model ◽  
Simulation Based ◽  
Different Types ◽  
Vapor Compression Refrigeration

A computer simulation based on MATLAB was developed to investigate the effectiveness of using evaporator condensate to subcool refrigerants in a vapor-compression refrigeration system. Three different types of refrigerant including R22, R410a, and R134a were studied. The simulation clearly showed the effectiveness of the technique to subcool refrigerant using evaporator condensate. Throughout the RH range of surrounding in this study, 40%-100%RH, the vapor-compression model system using R22 as a refrigerant provided the highest COP linearly ranging from 3.40 to 3.76. The greatest improvement in COP was found in the model system with R410a where the COP values increased by 3.33% to 15.36.

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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