Chapter 8, Problem 8.47P

A complex flow system expands helium from 1500 K, 1000 kPa to 500 K, 100 kPa. In the process this produces 4595 kJ/kg of work. The process exchanges heat with a reservoir at TR. If the process is reversible, find the unknown reservoir temperature (K). You can work this with either Thermofluids or the equations... Your choice. If equations, Cp=5.19 kJ/kg-K, Cv=3.12 kJ/kg-K, R=2.08 kJ/kg-K. Helium 1500 K 1000 kPa TR q 500 K 100 kPa W=4595 kJ/kg

Find the quanity of heat required to produce 79% dry steam at 8000 kpa from feedwater at 50 degrees celcius ?.

A condenser (heat exchanger) brings 1 kg/s water flow at 10 kPa quality 95% to saturated liquid at 10 kPa. The cooling is done by lake water at 20 degree Celsius that returns to the lake at 30 degree Celsius. For an insulated condenser, find the flow rate of cooling water.

A small power plant produces 25 kg/s steam at 3 MPa, 600 degrees Celsius in the boiler. It cools the condenser with the ocean water coming in at 12 degrees Celsius and returning at 15 degrees Celsius so the condenser exit is at 45 degrees Celsius. Find the net power output and the required mass flow rate of ocean water.

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4. An evaporator has R-410A at -20°C and quality 80% flowing in. The exit flow is saturated vapor at -20°C. a. Consider the heating to be a reversible process and find the specific heat transfer from the entropy balance. (Answer: 48.7 kJ/kg) b. If the heat source was at -10°C and the inlet and outlet streams still have the same properties as in a), calculate the specific entropy generation? (Answer: 7.33 J/(kg K))

In a Steam Power Plant steam enters the turbine at 6 bar and 400 C and is expanded isentropic ally to the condenser pressure of 0.1 bar. Find the condition of the exhaust steam and determine the cycle efficiency.

Please help with the correct answer Thermodynamics problem

Steam enters the high-pressure turbine at 150bar and 550c and low pressure turbine at 40bar and 550c .the condensor pressure is 0.1bar using mollier diagram find 1.the dryness fraction at the end of low pressure turbine 2.efficieny 3.steam rate 4.heat rate 5.work ratio