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Fin Boiler + -1 15 MPa Pump II TA 3 Open FWH 1.2 MPa 1-Ⓡ 1.2 MPa 15 MPa 600°C Turbine 1.2 MPa Pump I Condenser 10 kPa 10 kPa

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Consider a steam power plant that operates on the ideal reheat Rankine cycle. The plant maintains the boiler at 17.5 MPa, the reheater at 2 MPa, and the condenser at 50 kPa. The temperature is 550°C at the entrance of the high-pressure turbine, and 300°C at the entrance of the low-pressure turbine. Determine the thermal efficiency of this system. Use steam tables. The thermal efficiency of this system is 74 %.
Consider an 80 MW coal-fired steam power plant that runs on a reheat Rankine cycle. Steam enters the high-pressure turbine at 10 MPa and 500°C and the low-pressure turbine at 1 MPa and 500°C. Steam leaves the condenser as a saturated liquid at 10 kPa. Determine the mass flow rate of steam from the boiler. in metric tons per hour
A steam power plant operates on an ideal regenerative Rankinecycle. Steam enters the turbine at 6 MPa and 450°C and is condensedin the condenser at 20 kPa. Steam is extracted from the turbine at 0.5MPa to heat the feedwater in closed feedwater heater. Assume thatthe feedwater leaves the heater at the condensation temperature ofthe extracted steam and that the extracted steam leaves the heateras a saturated liquid and is pumped to the line carrying the feedwater.Show the cycle on a T-s diagram, and determine:(a) the net work output per kg of steam flowing through theboiler, and(b) the thermal efficiency of the cycle.
thermodynamics
PROBLEM: Steam power plant with ideal Rankine cycle. Steam enters the turbine at 4MPA and 700°C. The steam is cooled in the condenser at 20 kPa using cooling water. The net power output of the cycle is 100MW. Determine: a) The power produced by the turbine and consumed by the pump, b) thermal efficiency of the cycle, c) mass flow rate of the steam, and d) the mass flow rate of the condenser cooling water, if the cooling water enters the condenser at 15 °C and exits at 35°C. Draw the T-s diagram.
A vapor-compression cycle is used as a refrigerator to extract 8 kW of heat from a cold space at 0°C and rejects heat into a space at 25°C. R-134a enters the compressor at 140 kPa superheated by 4°C above the saturation temperature and leaves at 900 kPa. It exits the condensor as a saturated liquid. Assume that pressure losses are negligible and that the compressor is isentropic. Report your answers to four significant digits using rounding. QUESTION 1 Report the maximum possible COP. QUESTION 3 Report the power required by the compressor. QUESTION 2 Report the mass flow rate in kg/s. QUESTION 4 Report the COP for the cycle.
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. Assuming an isentropic efficiency of 85 percent for both the turbine and the pump, determine the actual specific enthalpy (kJ/kg) at the boiler inlet. (Use 2 decimal places for the final answer.)
CONSIDER A STEAM POWER PLANT OPERATING ON THE IDEAL REHEAT RANKINE CYCLE. STEAM ENTERS THE HIGH-PRESSURE TURBINE AT 15 MPA AND 600 °C AND IS CONDENSED IN THE CONDENSER AT A PRESSURE OF 10 KPA. ASSUMING THE REHEAT TEMPERATURE IS ALSO 600 °C AND IF THE MOISTURE CONTENT OF THE STEAM AT THE EXIT OF THE LOW-PRESSURE TURBINE IS NOT TO EXCEED 10%, DETERMINE: THE PRESSURE AT WHICH STEAM SHOULD BE REHEATED,
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 practical power cycle produces steam from the boiler at 600 kPa and 425°C. The turbine has an efficiency of 90%. The condenser pressure is 100 kPa, and the pump operates ideally (i.e., isentropically). Determine the following: (a) the work output from the turbine per kg of steam.(b) the thermal efficiency of the cycle.(c) the maximum possible efficiency of the cycle.There are three answers: (a), (b), and (c). Other values must be taken from Perry's handbook. I am sorry if this will take a lot of your time. But I will upvote as a appreciation for your effort