B. A Carnot heat engine, shown in Fig. below, receives 400 kJ of heat per cycle from a high-temperature source at 552°C and rejects heat to a low-temperature sink at 25°C. Determine (a) the thermal efficiency of this Carnot engine and (b) the amount of heat rejected to the sink per High tmetne rervoir Carnot

B. A Carnot heat engine, shown in Fig. below, receives 400 kJ of heat per cycle from a high-temperature source at 552°C and rejects heat to a low-temperature sink at 25°C. Determine (a) the thermal efficiency of this Carnot engine and (b) the amount of heat rejected to the sink per High tmetne rervoir Carnot

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.

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Plot the Carnot efficiency of Heat engine at thermal power plant over temperature range of 400 - 750 degree celcius
A heat engine operates between two reservoirs at 800 and 20oC. Onehalf of the work output of the heat engine is used to drive a Carnot heatpump that removes heat from the cold surrounding at 2oC and transfersit to a house maintained at 22oC.If the house is losing heat at a rate of 62,000 kJ/h,Determine:a) The minimum rate of heat supply (kJ/h) to the heat enginerequired to keep the house at 22oC. b) The thermal efficiency of the heat engine, if the rate of heatsupply to the heat engine is 15,000 kJ/h. c) The total amount of entropy change of the surrounding by takinginto account both the heat engine and Carnot heat pump for the casesof i) and ii), respectively. d) The cyclic entropy change of the heat engine for the cases of i) andii), respectively.
A heat engine that receives heat from a furnace at 1200°C and rejects waste heat to a river at 20°C has a thermal efficiency of 40 percent. Determine the second law efficiency of this power plant. P. S. Hi. please show me the full solution so i can review it thank you very much
A Carnot heat pump maintains a horne at 23 C during the cold season. At an average of -2C outsde emperdure, the house loses heat at a rate of 50,000 M/h. X this heat pump consumes 5 kW of power during operation, calculate (a) how ling the hed pump ran on thd day; (b) the total heating costs, assuming an average price of P12.67lkWh for ebctricity.
A refrigerator is used to keep the cold space at 5 °C by rejecting 8 kJ/s of heat by the condenser tothe outdoor air at 25 °C. If the compressor consumes 3 kJ/s of power, determinei. the rate of heat removed from the cold space (kJ/s),ii. the COP of the refrigeratoriii. the minimum power input to the compressor for the same rate of heat removed (kJ/s), andiv. draw the schematic of the refrigerator as a reversed heat engine.
Plot the Carnot efficiency of Heat engine at thermal power plant over temperature range of 400 to 750°C.
(II) A nuclear power plant operates at 65% of its maximumtheoretical (Carnot) efficiency between temperatures of 660°Cand 330°C. If the plant produces electric energy at the rateof 1.4 GW, how much exhaust heat is discharged per hour?
A refrigeration system absorbs heat from a space at 2 ◦C at a rate of 6.9 kW and rejects heatto water in the condenser. Water enters the condenser at 16 ◦C at a rate of 0.27 kg/s. The COPof the system is estimated to be 1.85. Determine (a) the power input to the system, (b) thetemperature of the water at the exit of the condenser, and (c) the second-law efficiency andthe exergy destruction for the refrigerator. Take the dead-state temperature to be the inlettemperature of water in the condenser. The specific heat of water is 4.18 kJ/kg·◦C.
Applying Clausius inequality to determine the minimum heat rejected if (300000 W) heat supplied to heat engine at constant temperature of (300 °C). The heat rejection takes place at 20°C. which of the result report: (i) reversible cycle. (ii) irreversible cycle.
Heat engine and refrigerator. Consider a heat engine operating between temperatures Th and Tj. During each cycle with time At, work W is extracted, so Pout = W/At. (a) Assuming the processes are all reversible, what is the efficiency of this heat engine, n = Wout/Qn? (b) Now assume that the low temperature of the heat engine is lowered by a reversible refrigerator, such that the heat engine operates between Th and T. The refrigerator takes input power Pin = Win/At and operates between T and T, where Ti < T. Draw an energy- entropy flow diagram. (c) Calculate the net efficiency (Wout - Win)/Qh. Is the efficiency of this system higher, lower, or the same as your answer for (a)?
The thermal efficiency of a Carnot heat engine is 30%. If the engine is reversed in operation to work as a heat pump with same operating conditions then what will be the COP for heat pump? (B) 2.33 (D) Can't be calculate (A) 0.30 (C) 3.33
II. Draw the Carnot cycle then prove that the efficiency of a Carnot heat engine is nc=1- TL TH