Chapter 5, Problem 5.53P

/Heat is transferred from a tank of water in a refrigerator at(OC) degrees to a tank of boiling water at (100 C) degrees. With a reversible machine (heat pump). Calculate the Heat drawn from the refrigerator. if it was The heat transferred to the tank of boiling water is 2254kJ.

A heat engine of 30% efficiency drives a heat pump of COP 5. The heat is transferred both from engine and the heat pump to circulating water for heating the building in winter. Find the ratio of heat transfer to the circulating water from heat pump to the heat transfer to the circulating water from the heat

An air conditioner using refrigerant 134a as work fluid It is used to keep the temperature of a room at 23 ° C by giving heat to the environment. The house from the walls and heat gain from windows is 250 kJ / min ; 900 W of heat from computer, TV and lamps to the room spreads. The refrigerant is 100 L / min in the form of saturated vapor at 400 kPa pressure to the compressor entering with flow and it left from the compressor 1200 kPa pressure and 70 ° C. a) real COP value b) max COP value c) Calculate the min volumetric flow rate for the refrigerant can have for the same compressor inlet and outlet conditions

An indoor heater operating on the Carnot cycle is warming the house up at a rate of 30 kJ/s to maintain the indoor temperature at 72 ºF. What is the power operating the heater if the outdoor temperature is 30 ºF

A reversible heat engine absorbs 3000 kJ from a reservoir at 1000 K and rejects 2500 kJ at 500 K. Find the heat interchanged with the reservoir at 300 K and the net work output of the engine.

Refrigerant R-410a inters a refrigerator compressor at a pressure of 150 kPa, -10 c° and leaves at 1200 kPa, 50 c° with mass flow rate of 3 kg/s. the compressor is water cooled and the heat loss to the water Qloss is 20 kW. Determine the compressor input work W.. Note: Neglect potential and kinetic energy in your calculations. 1 2 CN Compressor cool

Solve it correctly and fast please.

Steam engine with incomplete expansion receives saturated steam at 1.04 Mpa,expands it to 0.105 Mpa where release occurs. Exhaust is to a condenser at 40C.The actual engine uses 6070 kg/h of steam; it has a brake engine efficiency of 60%and a mechanical efficiency of 85%. The electric generator which it drives has anefficiency of 925. (a) For the ideal engine, find the thermal efficiency and the mep.For the actual engine, determine (b) the brake work in kW and the brake thermalefficiency, (c) the indicated work in kW, indicated thermal efficiency and indicatedsteam rate, (d) the combined thermal efficiency and the combined steam rate

R-134a as a refrigerant, in a cooling machine used; refrigerant to evaporator (evaporator) 0.15 drynessIt enters with a temperature of -12oC and a flow rate of 0.028 kg/s and leaves the evaporator as saturated steam. cooling machineSince it works according to the reverse Carnot cycle and the compressor consumes 1.45 kW of power a) Find the efficiency coefficient of the cooling machine. b) Calculate the heat given to the outside environment c) Calculate the condenser temperature