A heat pump with refrigerant-22 (R-22) as the working fluid is used to keep a space at 23 °C by absorbing heat from geothermal water that enters the evaporator at 85 °C at a rate of 0.08 kg/s and leaves at 32 °C. Refrigerant enters the evaporator at 10 °C with a quality of 20 percent and leaves at the same pressure as saturated vapor. If the compressor consumes 6.26 kW of power, accordingly determine a) The mass flow rate of the refrigerant, b) The rate of heat supply, c) The COP, and d) The minimum power input to the compressor for the same rate of heat supply. Note: You may use Thermodynamics Tables by Michael J. Moran for this question. Expansion valve 10°C x = 0.20 Condenser Compressor Evaporator Geo. water 85 °C 32°C Sat. vapor

A closed system undergoes a thermodynamic cycle with three steps: process 1-2 (from state 1 to state 2), process 2-3 (from state 2 to state 3), process 3-1 (from state 3 to state 1). During process 1-2, the system received energy by heat transfer of 5J and did work of 10J. During process 2-3, the system was transferred energy from its surrounding by heat transfer of 25J and work was done on the system of 20J. During process 3-1, the system discharged 40J to its surrounding by heat transfer. What is the net work in this cycle?

The arrangement of heat engines used to develop the thermodynamic temperature scale.

A closed system undergoes a thermodynamic cycle with three steps: process 1-2 (from state 1 to state 2), process 2-3 (from state 2 to state 3), process 3-1 (from state 3 to state 1). During process 1-2, the system received energy by heat transfer of 5J and did work of 10J. During process 2-3, the system was transferred energy from its surrounding by heat transfer of 25J and work was done on the system of 20J. During process 3-1, the system discharged 40J to its surrounding by heat transfer. What is work associated with process 3-1?