Determine the change in entropy of the surrounding.

please see attachment

Ideal vapor-compression refrigeration system

An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refrigeration capacity is 5 tons. Determine: -the compressor power in hp -the rate of heat transfer from the working fluid passing through the condenser, in Btu/min -the coefficient of performance

Ideal vapor-compression refrigeration cycle

An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar. Saturated vapor enters the compressor, and saturated liquid exits the condenser. The mass flow rate of the refigerant is 3 kg/min. Determine: -the coefficient of performance -the refrigerating capacity, in tons

Find the fuel consumption and the power delivered to the compressor and the propeller.

In the an ideal turbo jet, the engine is designed such that the turbine work is divided equally between the compressor and the propeller. The gas from the turbine discharges to a nozzle for additional thrust. Consider such an engine where the air enters the diffuser at 200 m/s, 40 kPa, 240 K, and a flow rate of 40 kg/s. The compressor ratio is 11, and the turbine inlet temperature is 1200 K. The fuel used as a heating value of 43,000 kj/kg.

reversible heat engine with multiple reservoirs

The heat engine in the atachment operates reversibly and draws 1200 KJ of heat from the 200 K reservoir. The work produced is 200 KJ. Determine the amount and direction of heat interactions with the other reservoirs.