10 tons of municipal solid waste (MSW) is burned directly in a boiler to generate saturated steam at 200°C. Water enters the boiler at 20°C. The heating value of MSW is 18,000 kJ/kg and the boiler efficiency is 75 percent. Determine the amount of steam generated. The generated steam is run through a turbine-generator unit to generate electricity. The steam pressure at the turbine exit is 100 kPa. If the turbine isentropic efficiency is 85 percent and the generator efficiency is 95 percent, determine the amount of electricity produced. How much revenue can be generated if the electricity is sold at a price of $0.11/kWh?

Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500C and is cooled in the condenser at a pressure of 10 kPa. Determine the Wnet (kJ/kg). (Use 2 decimal places for the final answer.)

Biomass is used as fuel to power the following cogeneration plant on a school. The turbine drives an electric generator to produce electricity, and part of the steam is extracted to provide heating to campus buildings. The boiler provides 106 kg/h of steam at 6 MPa, 520 °C, of which 4x105 kg/h is extracted between the first and second turbine stages at 1 MPa and diverted to the building heating load. Condensate returns from the building heating load at 0.95 MPa, 115 °C, and it is mixed with liquid exiting the lower pressure pump at 0.95 MPa. The entire flow is then pumped to the boiler pressure. Saturated liquid at 6 kPa leaves the condenser. The turbine stages and the pumps operate with isentropic efficiencies of 89 and 85%, respectively. The efficiency of the electric generator is 93% for converting turbine mechanical power into electricity. Calculate the heating load in kJ/h. Calculate the electric power generated in MWe.

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting its waste heat to cooling water that enters the condenser at 18°C at a rate of 0.28 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 65°C and leaves at 42°C. The inlet state of the compressor is 60 kPa and -34°C and the compressor is estimated to gain a net heat of 420 W from the surroundings. The heat exchanger loses no heat to the environment. 26°C 42°C Condenser Expansion valve Evaporator OL Water 18°C 1.2 MPa 65°C Oin W in Compressor 60 kPa -34°C Determine the COP of the refrigerator. (You must provide an answer before moving on to the next part.) The COP of the refrigerator is 1.824 >

In a steam plant operating according to an ideal Rankine cycle, water vapor enters the turbine at a pressure of 3.0 MPa and a temperature of 600 oC and exits the turbine with a dryness of 100 kPa and 0.8. By removing heat from the condenser to the surrounding environment, the water is provided to be saturated liquid at 100 kPa. In this case, what would be the amount of heat released from the Condenser to the surrounding environment per unit mass?

A flashed steam geothermal power plant is located where underground hot water is available as a saturated liquid at 700 kPa. The well-head pressure is 600 kPa. The flashed steam enters the steam turbine at 500 kPa and expands to 15 kPa when it is condensed. The flow rate from the well is 29.6 kg/s. Determine the cycle thermal efficiency of the plant in %. If the steam table is needed, please use the green book entitled "Thermodynamics Properties of Water Including Vapor, Liquid, and Solid Phases" by Keenan, Keyes, Hill, and Moore.

Consider a 150-MW steam power plant that operates on a simple Rankine cycle. Steam enters the turbine at 7 MPa and 500°C and is cooled in the condenser at 10 kPa. Calculate the mass flow rate of steam produced by the boiler. Assume an isentropic efficiency of 87% for both the turbine and the pump.

Steam enters the turbine at 10 MN/m? and 450°C. The steam expanded isentropically in the turbine down to the condenser pressure of 20 kN/m?. The power developed by the plant is 5600 kW. The condensate leaving the condenser is pumped to the boiler pressure isentropically. Taking into account the pump work and calculate: The mass of steam generated in the boiler. • Cycle thermal efficiency. • Specific steam consumption. Draw the cycle on a T-s diagram. Hint: 1 MN/m = 10 bar %3D

Concentrating solar collectors are used to provide the heat source for a Rankine cycle using water as the working substance. The design specifications require a power output of 10 MW. Commercially available collectors allow steam to be generated at 2500 kPa and 3200C. The cycle low pressure is assumed to be 8 kPa. Determine (a) the cycle thermal efficiency; (b) the mass flow rate of steam; and (c) the mass flow of cooling water if its temperature increases by 12oC.

A steam power plant operating in a Rankine cycle has saturated yapor at 4.0 MPa leaving the boiler. The turbine exhausts to the condenser, operating at 75 kPa, and the mass flow rate of the working fluid is 5.0 kg/hr. The turbine efficiency is 0.85. Solve for the work produced by the turbine and the pump (in Watts), the heat transfer in the boiler (in Watts), and the Rankine cycle efficiency.