scholarly journals Design of Evaporator Coil and Performance Evaluation of Vapour Compression Refrigeration System with Three Layer Evaporator

2021 ◽  
Vol 9 (VI) ◽  
pp. 5130-5133
Author(s):  
Mandave Ganesh
Keyword(s):  
Performance Evaluation ◽  
Refrigeration System ◽  
Refrigerant Capacity ◽  
And Performance ◽  
Vapour Compression

The performance of a vapour compression refrigeration system with a three-layer zigzag evaporator is evaluated in this research. The primary goal of this study is to compare the performance of a household refrigerator with a capacity of 165 litres, R-12as refrigerant, and a three layer zigzag shaped evaporator to that of an existing system. The refrigerant capacity of this evaporator assembly is maximised.

Experimental Analysis on Vapour Compression Refrigeration System Using Nanolubricant with HFC-134a Refrigerant

Nano Hybrids ◽  
2015 ◽  
Vol 9 ◽  
pp. 33-43 ◽  
Author(s):  
A. Manoj Babu ◽  
S. Nallusamy ◽  
K. Rajan
Keyword(s):  
Energy Consumption ◽  
System Performance ◽  
Mineral Oil ◽  
Coefficient Of Performance ◽  
Refrigeration System ◽  
Hfc 134A ◽  
Reduce Energy Consumption ◽  
And Performance ◽  
Vapour Compression ◽  
Better Than

This paper investigates the reliability and performance of a refrigeration system using nanolubricant with 1, 1, 1, 2-Tetrafluoroethane (HFC-134a) refrigerant. Mineral Oil (MO) is mixed with nanoparticles such as Titanium Dioxide (TiO2) and Aluminium Oxide (Al2O3). These mixtures were used as the lubricant instead of Polyolester (POE) oil in the HFC-134a refrigeration system as HFC-134a does not compatible with raw mineral oil. An investigation was done on compatibility of mineral oil and nanoparticles mixture at 0.1 and 0.2 grams / litre with HFC-134a refrigerant. To carry out this investigation, an experimental setup was designed and fabricated in the lab. The refrigeration system performance with the nanolubricant was investigated by using energy consumption test. The results indicate that HFC-134a and mineral oil with above mentioned nanoparticles works normally and safely in the refrigeration system. The refrigeration system performance was better than the HFC-134a and POE oil system. Thus nanolubricant (Mixture of Mineral Oil (MO) and nanoParticles) can be used in refrigeration system to considerably reduce energy consumption and better Coefficient of Performance (COP).

scholarly journals Thermal Prospective Estimations of COP and TR for R12 and HR12 Vapour Compression Refrigeration Systems

2019 ◽  
Vol 9 (2) ◽  
pp. 897-902
Keyword(s):  
Performance Evaluation ◽  
Power Consumption ◽  
Linear Relationship ◽  
System Performance ◽  
Graphical Representation ◽  
Refrigeration System ◽  
Energy Meter ◽  
Temperature And Pressure ◽  
Vapour Compression ◽  
System Performance Evaluation

Experimentations got executed for investigating influence of R12 and HR12 refrigerants on system performance evaluation in terms of COP and TR. Temperature and pressure got measured by different temperature and pressure gauges mounted at several predetermined locations. Additionally, power consumption by refrigeration system also got measured from the installed energy meter readings. Altogether, it summarizes the tabular inscriptions of the variations of COPth, COPact and COPrel with TR for R12 and HR12 refrigerants. Besides, it also demonstrates the graphical representation of the corresponding variations of COPth, COPact and COPrel with TR for R12 and HR12 refrigerants. As expected, it stands observed (from both the stated table and figure) that both COPth and COPact increase with TR, however, the COPrel decreases with the same for said R12 and HR12 refrigerants. Furthermore, the stated variations of COPth, COPact and COPrel with TR remain observed as approximately linear, independently. That’s why, both COPth and COPact stay directly proportional to TR, however, the COPrel stays inversely proportional to the same because of approximately linear relationship between the COPth, COPact and COPrel with TR, individually. Additionally, COPact decreases with the increase of Wi/p for both R12 and HR12 refrigerants. However, Qext increases with Wi/p for both R12 and HR12 refrigerants.

Simulation and Performance Evaluation of Finned Tube Gas Cooler for Trans-Critical CO2 Refrigeration System

2013 ◽  
Vol 281 ◽  
pp. 324-328 ◽  
Author(s):  
Dileep Kumar Gupta ◽  
Mani Shankar Dasgupta
Keyword(s):  
Carbon Dioxide ◽  
Mathematical Model ◽  
Performance Evaluation ◽  
Cost Effective ◽  
Finned Tube ◽  
Refrigeration System ◽  
Air Velocity ◽  
Time Performance ◽  
And Performance

Carbon dioxide is one of the rediscovered sustainable options, as CFCs and HFCs are now in the list of regulated substances, to be phased out in time bound way. There are however various challenges to the successful use of CO2 as refrigerant. Cost effective and widely acceptable technology is demand of the time. Performance of trans-critical CO2 refrigeration systems is found to be sensitive to the gas cooler design. In the present work a detailed mathematical model is developed for a finned tube air cooled gas cooler and the same is validated using published literature. Subsequently, to achieve the lowest possible approach temperature, the performance of the gas cooler is analyzed for various air velocity and alternate pipe arrangements. The effect of increase in size of gas cooler to its performance is also studied.

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