Question

Problem 10.008 SI Refrigerant 22 enters the compressor of an ideal vapor-compression refrigeration system as saturated vapor at -30°C with a volumetric flow rate of 5 m/min. The refrigerant leaves the condenser at 19°C, 9 bar. Determine: (a) the magnitude of the compressor power, in kW. (b) the refrigerating capacity, in tons. (c) the coefficient of performance. (d) the rate of entropy production for the cycle, in kW/K. Part A Determine the magnitude of the compressor power, in kW. W. = kW the tolerance is +/-2%

Answer 1

Hi here is the solution for your question. I hope I could help you in future also. If anything is not clear to you please let me know before giving your valuable feedback.

I would like to improve that in the future.

Thanks

Solution

1. Given volumetric How gate = 5 m3/min Entering tempa - 3oC = T, T2 = 19°C P2 = 9 ber. compressor power in kw. find it mag nitude of Assumptions solution - reversible process. (ii) kinetic Energy and potential energy change is neglegible. Step 1 : compressor power = - wea in Chr-hi) where his Enthalpy at -30°C h2 = enthalpy at a bar. in = mass How rate =) (AV) - 8 = specific volume from Table hia 226.8 kJ/kg 5,= S2 = 10005 ksi kesk h2 = 287.54 K7/Kes S2 = 10005 KSK

stepz. V, - specifici volume: 0.1355 m3 kg - step fut values of all in formula to calculate wc Weg in (ha-hi) im) (AV) 1 CAN) as - & sm² x kg minx 0-1355 m3 = 0.615 kg/s WE CISM 207.59- 26-8 ] W. 6.615 k9 T 287. 54 - 226.8 - 137.35 kw) (b) referigiration capacity in = in (hi-hy bohем че за чет]ь, . DY a obsll 36.90 kg & 1288.59-841 847 kJ x Iton I lg 211 KS min min Gers 24.93 tons

- (C) cofficient & of performance hi-hy harhi 226.8-84 - 287.154 789 287.54- 226.8 "226.8 22.351 (d) Rate of Entropy & 1.005 1.0oo5 kJ 0.615 0.615
i hope it will help you. If I missed anything please let me know before giving your rating.

Thanks