Chapter 7, Problem 7.24P

R-134a as a refrigerant, in a cooling machine used; refrigerant to evaporator (evaporator) 0.15 drynessIt enters with a temperature of -12 oC 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

2.A steam throttling valve with inlet conditions of 3MPA and 500C is connected to the inlet of the turbine. The turbine has 800kW power output and heat absorbed of 500kw. If the mass flow rate is 1kg/s and the exit temperature of steam is 400C, find the exit turbine pressure. (

Find COP of a reversible heat pump operating between temperatures 20 and 200 °c

Solve it correctly and fast please.

A Factory uses a vapor absorption refrigerator to cool its products, the heat is supplied to generator by steam at 150 C (hfg=2500kJ/kg) and 90% dry. The temperature of the evaporator is to be maintained at -5 C. the refrigeration capacity is 20 Tonnes and actual COP is 70% of the maximum, atmospheric Pressure is 1 bar and ambient temperature 30 C. find the maximum COP. mass of steam per hour

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

Q5/ A steam power plant operates with a boiler output of 20 kg/s steam at 2 MPa and 600°C. The condenser operates at 50 C, dumping energy intoa river that has an average temperature of 20 C. There is one open feedwater heater with extraction from the turbine at 600 kPa, and its exit is saturated liquid. Find the mass flow rate of the extraction flow. If the river water should not be heated more than 5 C, how much water should be pumped from the river to the heat exchanger (condenser)? For the temperature of condensate is (50 °C), the temperature of cooling water of condenser at inlet and outlet is (20 °C and 35 °C) respectively. The mass of condenser cooling water per kg of steam is (32 kg). Determine the dryness fraction of the steam at it enters the condenser

find the specific enthalphy at each point of the cycle, the amount of heat added, heat rejected, turbine work, pump work, net work and thermal efficiency in a carnot cycle between pressure limits of 3MPa and 10KPa

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