A Carnot heat engine receives heat from a reservoir at 1200°C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 32°C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -7°C and transfers it to the same ambient air at 32°C. Determine (a) the maximum thermal efficiency of the heat engine, (b) the maximum power output of the heat engine (kJ/min), (c) the maximum COP of the refrigerator, (d) the maximum rate of heat removal from the refrigerated space (kJ/min). 1200 °C 1000 KJ/min HE -7 °C 32 °C

A Carnot heat engine receives heat from a reservoir at 1200°C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 32°C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -7°C and transfers it to the same ambient air at 32°C. Determine (a) the maximum thermal efficiency of the heat engine, (b) the maximum power output of the heat engine (kJ/min), (c) the maximum COP of the refrigerator, (d) the maximum rate of heat removal from the refrigerated space (kJ/min). 1200 °C 1000 KJ/min HE -7 °C 32 °C

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 Carnot heat engine receives heat from a reservoir at 700 ° C at a rate of 600 kJ / min and rejects the waste heat to the ambient air at 25 ° C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at - 6 ° C and transfers it to the same ambient air at 25 ° C. Determine (a) the maximum rate of heat removal from the refrigerated space and (b) the total rate of heat rejection to the ambient air.
A Carnot heat engine receives heat at 900 K and rejects the waste heat to the environment at 300 K. The entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the cooled space at -15°C at a rate of 250 kJ/min and rejects it to the same environment at 300 K. Determine (a) the rate of heat supplied to the heat engine and (b) the total rate of heat rejection to the environment.
An air conditioner with refrigerant-134a as theworking fluid is used to keep a room at 26C by rejectingthe waste heat to the outside air at 34C. The room isgaining heat through the walls and the windows at a rate of 250 kJ/min while the heat generated by the computer,TV, and lights amounts to 900 W. An unknown amountof heat is also generated by the people in the room. Thecondenser and evaporator pressures are 1200 and 500 kPa,respectively. The refrigerant is saturated liquid at the condenserexit and saturated vapor at the compressor inlet. Ifthe refrigerant enters the compressor at a rate of 100 L/minand the isentropic efficiency of the compressor is 75 percent,determine (a) the temperature of the refrigerant at thecompressor exit, (b) the rate of heat generation by the peoplein the room, (c) the COP of the air conditioner, and(d) the minimum volume flow rate of the refrigerant at thecompressor inlet for the same compressor inlet and exitconditions.
A CARNOT heat engine receives heat from a reservoir at 900°C at a rate of 800kJ/min and rejects the waste heat to the ambient air at 27°C. All the power produced by the thermal engine is used to act as a refrigerator that removes heat from the refrigerated space at -5°C and transfers it to the same ambient air at 27°C. Determine a) the maximum rate of heat removal from the refrigerated space and b) the total rate of heat rejection to the ambient air.
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.
What is cyclic Heat engine? What is the difference between refrigerator and heat Pump?
A heat engine is operating on a Carnot cycle and has a thermal efficiency of 55 percent. The waste heat from this engine is rejected to a nearby lake at 60°C at a rate of 900 kJ/min. Determine the temperature of the source.
A thermal machine operates between 2 tanks at 800ºC and 20ºC; half of the power produced by this machine is used to drive a fully reversible heat pump that absorbs heat from the cold environment at 2ºC and transfers it to a house that is maintained at 22ºC. If the house loses heat at a rate of 62,000 kJ/hr, determine the minimum heat flux that must be supplied to the heat engine in kJ/hr. show step by step a) 11,565.3 kJ/hra. b) 8,406.8 KJ/hra c) 3,158.5 KJ/hra d) 6,110.9 KJ/hra d) N.A.
An inventor claims to have developed a heat engine that receives 700 kJ of heat from a source at 500 K and produces 300 kJ of net work while rejecting the waste heat to a sink at 290 K. Is this a reasonable claim? Why?
1. A geothermal-based trigeneration plant produces 2.5 MW of electricity, 1.8 MW of process heat, and 1.4 MW of cooling. Electricity is produced for a period of 7500 h, heating for 2500 h, and cooling for 2000 h per year. The energy of geothermal plant consumed in the plant is 4 × 107 kWh during an entire year period. Determine the annual average utilization factor of this plant.
A Carnot heat engine receives heat from a reservoir at 900°C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 27°C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at –5°C and transfers it to the same ambient air at 27°C. Determine the total rate of heat rejection to the ambient air.
Carnot heat engine receives heat at 750k and rejects the waste heat to the environment at 300k .the entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the cooled space at -15 degrees Celsius at a rate of 400KJ/min and rejects it to the same environment at 300K.Determine the rate of heat supplied to the environment and the total rate of heat rejection to the environment