METEO 300 Lecture Notes - Lecture 31: Superheating, Carnot Cycle, Isentropic Process
Document Summary
Me 300 - lecture 31 - cycles: vapor-compression cycle (refrigerator) Vapor-compression cycle: the reversed carnot cycle for real gases. Key points: a throttle replaces the turbine and increases entropy, this is done because the compressor does not work well with mixtures, so. Consider an ideal vapor-compression refrigeration cycle operating between pressures of 0. 14 mpa and 0. 80 mpa. The flow rate of the refrigerant (r-134a) is 0. 04 kg/s. Determine the rate at which energy is removed from the cold space, the rate at which energy is rejected to the surroundings, the power input to the compressor and the cycle. Also, compare the cycle cop with that of a reversed carnot cycle operating between the same pressures. State 1: = 1 and 1 = 0. 14 mpa. 1 = = 387. 32 kj/kg, 1 = = 1. 7402 kjkg k, and 1 = = 254. 39 k. State 2: 2 =1 and 2 = 0. 8 mpa. State 3: = 0 and 3 = 0. 8 mpa.
