Chapter 5, Problem 5.103P

Find the COP of refrigerator working between temperatures 350 K and 1050 K. What will be efficiency of heat engine operating in same temperature range?

A heat pump shown is driven by 3.0 MW motor and receives heat from a source at 60C and deliver energy to a boiler that operates at constant pressure and saturation temperature of 140 C. The water enters the boiler as saturated liquid and leaves as saturated vapor at the same temperature. The heat pump operates with a COP (coefficient of performance) that is 60% of a Carnot heat pump COP. Find : 1- the maximum mass flow rate of water the system can deliver 2- the heat received from the source Q, boiler mter TH VHP - w T 60°C

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The thermal efficiency of a Carnot heat engine is 30%. If the engine is reversed in operation to work as a heat pump with same operating conditions then what will be the COP for heat pump?

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A refrigeration system operates an ideal vapor compression using R-143a with an evaporator temperature of-30°C and the condenser exist temperature of 50°C and requires 75 KW motor to drive the compression. What is the cooling capacity of the refrigerator in KW? And find COP.

A heat pump shown is driven by 2.5 MW motor and receives heat from a source at 80 C and deliver energy to a boiler that operates at constant pressure and saturation temperature of 130 C. The water enters the boiler as saturated liquid and leaves as saturated vapor at the same temperature. The heat pump operates with a COP (coefficient of performance) that is 70% of a Carnot heat pump COP. Find: 1- the maximum mass flow rate of water the system can deliver 2- the heat received from the cold source Q, boiler mwater eb TH V HP 2.5 MW TL=80°C

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A cycle heat engine does 60KJ of work per cycle. If th efficiency of the heat engine is 60%. The heat rejected per cycle is?