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If the steam is throttled down to 2 MPa before entering the turbine, find the actual turbine specific work.
A Rankine cycle with R-410a has the boiler at 600 psia superheating to 340 F. Compute all four energy transfers and the cycle efficiency.
Determine the steam flow rate to the high pressure turbine and the power required to drive each of the pumps.
A smaller power plant produces 50 lbm/s steam at 400 psia, 1100 F in the boiler. Find the net power output and the required mass flow rate of the ocean water.
The source for the boiler is at constant 350 F. Compute the extraction flow rate and state 4 into the boiler.
A closed FWH in a regenerative steam power cycle heats 40 lbm/s of water from 200 F, 2000 lbf/ in2. What is the required mass flow rate of the extraction steam?
Calculate the thermal efficiency of the cycle and the network per pound-mass of steam.
If the steam is throttled down to 300 lbf/ in.2 before entering the turbine, find the actual turbine specific work.
What is the minimum high P and the maximum low P it can use? Determine the COP of this refrigerator for the working fluids R-134a and R-410a.
If 3000 Btu of heat is required in the generator (solar collector) per pound-mass of ammonia vapor generated, determine the overall performance of this system.
Discuss how the Gladstone Committee Report addressed conflict over the words rehabilitation and treatment.
In contrast, the international view, specifically Europe, uses the rehabilitation model.
The molten salt has 5 kg/s flow with Cp = 1.5 kJ/kg K. What is the possible water flow rate, the rate of energy transfer, and the rate of entropy generation?
Steam enters the turbine of a power plant at 5 MPa, 400oC. Find the thermal efficiency of the power plant and how it compares with that of a Carnot cycle.
The turbine efficiency is 85%, and other cycle components are ideal. If the boiler superheats to 800oC, find the cycle thermal efficiency.
A new air conditioner using R-410a is used in heat pump mode. Find the COP, the heating rate, and the rate of entropy generation for the heat pump.
Find the high temperature, the condensing temperature and the COP if it is used in a standard cycle with high and low pressures of 6 MPa and 3 MPa respectively.
After the compressor, the temperature is measured to be 60oC. Find the actual compressor work and the actual cycle COP.
Determine the amount of energy saved by using the heat pump instead of directly heating the water from 15oC to 60oC.
Determine the entropy generation in the compression process, the refrigeration capacity, and the COP for this cycle.
The condenser must reject 25 MW from the water to the air. Find the flow rate of air and the second-law efficiency of the heat exchanger.
Determine the flow of exergy into or out of the reservoirs per kilogram of steam flowing in the cycle. What is the overall cycle second-law efficiency?
A heat source is available at 100oC. Also find the efficiency of the heat engine part and the COP of the refrigeration cycle part.
A Rankine cycle flows 5 kg/s ammonia at 2 MPa, 140oC to the turbine, which has an extraction point. Find the extraction flow rate and state 4 into the boiler.
A power plant with one closed FWH has a condenser temperature of 45oC. Find the fraction of extraction steam flow and the two specific pump work inputs.