A steam power plant receives heat from a furnace at a rate of 250 kJ/h. Heat losses to the surrounding air from the steam are estimated to be about 5 kJ/h. If the waste heat is transferred to the cooling water at a rate of 150 kJ/h, i. Determine net power output of the steam power plant. ii. Determine the thermal efficiency of this power plant.

A steam power plant receives heat from a furnace at a rate of 250 kJ/h. Heat losses to the surrounding air from the steam are estimated to be about 5 kJ/h. If the waste heat is transferred to the cooling water at a rate of 150 kJ/h, i. Determine net power output of the steam power plant. ii. Determine the thermal efficiency of this power plant.

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

See similar textbooks

Similar questions

a) A heat engine takes 325 kJ of heat from a 1000 K energy reservoir and also 125 kJ of waste heat It throws it into a 400K energy reservoir. Meanwhile, it releases an energy of 200 kJ. Is the cycle in which this heat engine operates reversible? Is it irreversible? Is it impossible? Why? b) An inventor designed a cooling device with an efficiency coefficient of 8.5 between -10°C indoor temperature and 25°C room temperature. He claims to be running his machine. Could this claim be true? Why?
A Carnot heat engine receives heat from a reservoir at 900⁰C at a rate of 700 kJ/min and rejects the waste heat to the ambient air at 27⁰C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -5⁰C and transfers it to the same ambient air at 27⁰C. Determine a) the maximum rate of heat removal from the refrigerated space and a) the total rate of heat rejection to the ambient air. Pls include illustration of cycle.
Please provide Handwritten answer
A power plant running based on the Carnot cycle receives 500kJ of heat per cycle from a temperature source at 652°C and rejects heat to a near by river. The temperature of the river is 30°C. Determine the thermal efficiency of the plant and the amount of heat rejected into the river per cycle.
11. Assuming that the Philippines is consuming 3.5×10^20 kWh of electrical energy in one year and the power plant has a conversion efficiency of 32%. Determine the annual energy generated by the plant in kJ if combined mechanical and electrical efficiency is 75%.
A gas turbine unit has a maximum cycle temperature of 800°C and pressure 12MPa. Calculate the network output in kW of an electric generator geared to the turbine when the air enters the compressor at 20°C temperature and 4MPa pressure. The air flows through the gas power unit at the rate of 123kg/min.
Professor Modyn wants to power his refrigerator with a heat engine. A Carnot heat engine receives heat from a reservoir at 543.0 ∘C543.0 ∘C at a rate of 820 kJ/min820 kJ/min and rejects heat to the ambient air at 31.1 ∘C.31.1 ∘C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at −3.23 ∘C−3.23 ∘C and transfers it to the same ambient air at 31.1 ∘C.31.1 ∘C. Note: The IUPAC sign conversion for work is used. Work into the system has a positive value. Determine the maximum rate of heat removal from the refrigerated space (kW) Determine the total rate of heat rejection to the ambient air. Heat rejection is a negative value. Account for both the heat engine and refrigerator.
A 6.6MW steam power plant operating with 7 sets of turbine-generators. During the low load period, one set of turbine-generators is switched off for 3.6 hours and the superheated steam to this switched off turbine-generator is stored in an accumulator to a 97% of its storage capability. If the storage capability of accumulator is 17.3 GJ, what is the turbine thermal efficiency?
A four-stroke turbocharged V-16 diesel engine built by a car manufacturer company to power fast trains produces mechanical 3500 hp (2.609 MW) at 1200 rev/min. Determine the amount of work produced in kJ (a) per cylinder per mechanical cycle and (b) per cylinder per thermodynamic cycle.