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A refrigeration plant working on Carnot cycle is designed to take the load of 4T of refrigeration. The cycle works between 2°C and 27°C. The power required to run the system is : (a) 1.27 kW (b) 3.71 kW (c) 5.71 kW (d) 7.27 kW |
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Answer» (a) 1.27 kW Refrigeration plant on Carnot cycle takes load i.e. Refrigeration effect, R = 4T=4 × 3.5 =14 kW The working temperature, T1 = 27°C = 300K T2 = 2°C = 275K \(\therefore\) COP is defined as, \(\cfrac RW\) = \(\cfrac{T_2}{T_1-T_2}\) \(\cfrac {14}W\) = \(\cfrac{275}{300-275}\) = \(\cfrac{275}{25}\) = 11 \(\therefore\) Power required to run the compressor, p = \(\cfrac {14}{11}\) = 1.27 kW |
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