Refrigeration Experiment

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Laboratory report
Vapour-Compression Refrigeration Experiment
Thermodynamics
Date of experiment: 26 June 2012
Group D2:

Introduction
The laboratory session for refrigeration system was performed in order to investigate the main concepts of the vapour-compression refrigeration cycle. Simple refrigeration system studied in the laboratory is a prototype for a variety of engineering applications utilized in industrial, domestic and scientific purposes. The detailed goals include the study of how the refrigeration process is affected by the water flow rate through the condenser and evaporator. The optimal flow rate is determined for condenser and evaporator. Finally, the efficiency of the refrigeration system is analyzed.
Theory
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Readings for changes in temperature at each of 9 sensors were extracted from the software data and are given in Table 1. Water
Flow
F1
[l/min] | T1
[°C] | T2
[°C] | T3
[°C] | T4
[°C] | T5
[°C] | T6
[°C] | T7
[°C] | T8
[°C] | T9
[°C] | 2,2 | 26,7 | 32,8 | 25,6 | 48,7 | 34,7 | 33,4 | 6,0 | 26,2 | 22,4 | 2,0 | 26,7 | 33,8 | 25,6 | 51,8 | 35,4 | 34,3 | 6,3 | 26,2 | 22,3 | 1,6 | 26,7 | 35,4 | 25,3 | 53,7 | 36,4 | 35,5 | 7,4 | 26,2 | 22,2 | 1,3 | 26,6 | 37,5 | 24,8 | 55,1 | 37,9 | 37,2 | 8,9 | 26,2 | 22,1 | 1,0 | 26,6 | 40,3 | 24,6 | 56,9 | 40,8 | 39,4 | 9,7 | 26,1 | 22,1 | 0,8 | 26,7 | 46,0 | 22,8 | 58,8 | 46,0 | 44,9 | 12,6 | 26,2 | 22,2 |
Table 1. Effect of reducing the condenser water flow rate on the system temperature
From Table 1 it can be seen that values for T1, T8 and T9, which indicate the water temperature in the compressor and evaporator, respectively, did not change with the flow rate variations. At the same time temperature at sensor 3, which corresponds to the refrigerant temperature entering the compressor, was reducing. T2, temperature of water at the entrance of the condenser, is increasing to a maximum of 46.0ᵒC, while temperatures of the refrigerant after the condenser (T5), before and after the throttling
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