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

Cogeneration is often used where a steam supply is needed for industrial process energy. Assume a supply of 5 kg/s steam at 0.5 MPa is needed. Rather than generating this from a pump and boiler, the setup in below. is used so the supply is extracted from the high-pressure turbine. Find the power the turbine now cogenerates in this process. 2 3 HP LP

2. A reverse Carnot cycle requires 3 hp and extracts energy from the laketo heat a house .If the house is kept at 70°Fand requires 2110 kj/min... what is the temperature of the lake?

A Steam power plant uses a Rankine cycle to produce electrical power. The boiler pressure is 2 MPa and the temperature at the turbine inlet is 300C. The pump inlet pressure is 0.025 MPa and the entropy is 0.8931 kJ/kg-k. The turbine gives 1MW of work to the generator. Find the dryness of the steam at turbine exit, Wp, Qa, Qr, Wt, Wnet, efficiency, SR, and mass flow rate of steam. (84.65%, 2.0143 kJ/kg, 2749.56 kJ/kg, 1986.15 kJ/kg, 765.42 kJ/kg, 763.41 kJ/kg, 27.76%, 4.7157 kg/kWh, 1.3064 kg/s) -Draw the T-S diagram with properly labelled points and solve the problems. Show your COMPLETE solution - Use the Steam Table provided if necessary.