Refrigerant 134a is the working fluid in an electric powered, air-source heat pump that maintains the inside tem- peratu

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Refrigerant 134a Is The Working Fluid In An Electric Powered Air Source Heat Pump That Maintains The Inside Tem Peratu 1 (66.43 KiB) Viewed 64 times

Refrigerant 134a is the working fluid in an electric powered, air-source heat pump that maintains the inside tem- perature of a building at 22°C for a week when the average outside temperature is 5°C. Saturated vapor enters the compressor at -8°C and exits at 50°C, 10 bar. Saturated liquid exits the condenser at 10 bar. The refrigerant mass flow rate is 0.2 kg's for steady-state operation. Determine (a) the compressor power, in kW, (b) the isentro- pic compressor efficiency. (c) the heat transfer rate provided to the building, in kW, (d) the coefficient of perfor mance, and (e) the total cost of electricity, in S, for 80 hours of operation during that week, evaluating electricity at 15 cents per kW-h. 50°C -8°C 3, 2s P₂ = 10 bar -Tinside = 22°C - Toutside = 5°C