FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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In a Rankine cycle, steam leaves the boiler and enters the turbine at 4 MPa, 400C. The condenser pressure is 10 kPa. What is the pump work in kJ/kg?
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.
A smaller power plant produces 25 kg/s steam at 3 MPa, 600°C in the boiler. It cools the condenser with ocean water so the condenser exit is at 45°C. There is a reheat done at 500 kPa up to 400°C and then expansion in the low pressure turbine. For the engine, find W and e?
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- Find the COP of the simple vapor compression refrigeration cycle R-134a. The evaporation temperature is -5 ° C and the condenser temperature is 30 ° C. COP ?arrow_forwardReheat steam has 2000 psia throttle pressure at the turbine inlet and 410 kPa reheat pressure, the throttle and reheat temperature of the steam is 1010 F, condenser pressure is 0.50 psia, engine efficiency of high pressure and low pressure is 75%. Find the cycle thermal efficiency.arrow_forward10 0.9967. Ans. H.W 2 A smaller power plant produces steam at 3 MPa, 600 C, in the boiler. It keeps the condenser at 45 C by the transfer of 10MW out as heat transfer. The first turbine section expands to 500 kPa, and then flow is reheated followed by the expansion in the low-pressure turbine. Find the reheat temperature so that the turbine output is saturated vapor. For this reheat, find the total turbine power output and the boiler heat transfer. Answer. (Reheat temperature= 529°C , total turbine power output= 6487 kW, the boiler heat transfer= 16 475 kW)arrow_forward
- In a steam turbine steam at 2 MPa, 360°C is expanded to 8 kPa. It then enters a condenser, where it is condensed to saturated liquid water. The pump feeds back the water into the boiler. Assume ideal processes, find per kg of steam the net work and the cycle efficiency. 3(360°C) 2 MPa 8 kPaarrow_forwardSOLVE 4 KNLYarrow_forwardН.W A smaller power plant produces steam at 3 MPa, 600•C, in the boiler. It keeps the condenser at 45 C by the transfer of 10MW out as heat transfer. The first turbine section expands to 500 kPa, and then flow is reheated followed by the expansion in the low-pressure turbine. Find the reheat temperature so that the turbine output is saturated vapor. For this reheat, find the total turbine power output and the boiler heat transfer. [Answer. (Reheat temperature= 529°C , total turbine power output= 6487 kW, the boiler heat transfer= 16 475 kW)]arrow_forward
- A smaller power plant produces 25 kg/s steam at 3 MPa, 600o C in the boiler. It cools the condenser with ocean water so the condenser exit is at 45o C. There is a reheat done at 500 kPa up to 400o C and then expansion in the low pressure turbine. For the engine find W and ?? .arrow_forwardSteam is supplied to a turbine at 600 psia with 200 F superheated and exhausts to the condenser at 0.7 psia . Assume the process to be isentropic and use the steam table to find : a.) The entropy and enthalpy at inlet. b.) The enthalpy and moisture content at exhaust.arrow_forwardSee photo belowarrow_forward
- 3arrow_forwardA reheat steam cycle has 13500 kPa throttle pressure at the turbine inlet and 2800 kPa reheat pressure. The throttle and reheat temperature of the steam is 540°C. The condenser pressure is 3.4 kPa. Find the cycle thermal efficiency in %. Note: At 13.5 MPa, tsat = 333.88 deg C, s, 3.5921 kJ/kg-K, Sg 5.4022 kJ/kg-K.arrow_forwardIn a carnot cycle. The pressure at the end of heat rejection is 14 psia while the pressure at the end of expansion is 329 kPaa. Find the cycle efficiency in % if the working fluid is hot airarrow_forward
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