In each cycle of its operation, a thermal engine absorbs 1500 J of heat from a large heat reservoir at 550 K and discharges heat to another large heat sink at 200 K. Calculate: (a) The thermodynamic efficiency of the heat engine, operated reversibly (b) The quantity of heat discharged to the low-temperature sink each cycle (c) The maximum amount of work the engine can perform each cycle

In each cycle of its operation, a thermal engine absorbs 1500 J of heat from a large heat reservoir at 550 K and discharges heat to another large heat sink at 200 K. Calculate: (a) The thermodynamic efficiency of the heat engine, operated reversibly (b) The quantity of heat discharged to the low-temperature sink each cycle (c) The maximum amount of work the engine can perform each cycle

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.

See similar textbooks

Similar questions

Calculate the thermal efficiency of a Carnot cycle heat engine operating between reservoirs at 300°C and 45°C.
Consider a Carnot heat-engine cycle executed in a steady-flow system using steam as the working fluid. The cycle has a thermal efficiency of 30 percent, and steam changes from saturated liquid to saturated vapor at 275°C during the heat addition process. If the mass flow rate of the steam is 3 kg/s, determine the net power output of this engine, in kW.
(a) What is the hot reservoir temperature of a Carnot engine that has an efficiency of 42.0% and a cold reservoir temperature of 27.0C? (b) What must the hot reservoir temperature be for a real heat engine that achieves 0.700 of the maximum efficiency, but still has an efficiency of 42.0% (and a cold reservoir at 27.0C)? (c) Does your answer imply practical limits to the efficiency of car gasoline engines?
Thermodynamics review that I cannot solve! Would appreciate some or all done out A heat engine with a thermal efficiency of 45% rejects 1000 kJ/kg of heat to a low temperature sink. 1. How much heat does it receive (kJ/kg)? 2. How much work does it produce (kJ/kg)? 3. If the cycle operates between temperatures of 400°C and 50°C,what is the maximum amount of work that this cycle can produce (kJ/kg)? 4. A Carnot heat pump operates between 273 K and 313 K, determine its Coefficient of Performance.
It is claimed that a certain cyclical heat engine operates between the temperatures of TH = 448°C and TC = 155°C and performs W = 3.98 MJ of work on a heat input of QH = 4.97 MJ. a. How much heat, in megajoules, would be discharged into the low-temperature reservoir? b. Which choice, by itself, is unreasonable about the claim? 1. The efficiency is greater than the Carnot efficiency for the stated temperatures 2. The work performed is less than the heat input. 3. The temperature difference is greater than 273.15 K. 4. All of these. 5. None of these
The efficiencies of all reversible heat engines operating between the same two reservoirs are the same?
Refrigerant-134a at a rate of 0.08 kg/s enters the compressor of a refrigerator as superheated vapor at 0.18 MPa and 0 ℃ and leaves at 0.9 MPa and 80 ℃. The refrigerant is cooled in the condenser to 31.3 ℃ and 0.8 MPa and it is throttled to 0.18 MPa. Disregarding any heat transfer and pressure drops in the connecting lines between the components, Determine the adiabatic efficiency of the compressor
Using the concepts in Energy Flow Diagram of a Refrigerator under Cyclic Process answer the set of problems below:
As per the Carnot cycle efficiency, the thermal efficiency of heat engines increases with an increase in the temperature of the heat source. An inventor has proposed to use a heat pump to transfer the heat from the source to a high-temperature thermal medium before being used in the heat engine. The inventor has claimed this arrangement increases thermal efficiency. Evaluate the inventor's claim through the thermodynamic principles.
A reversible heat engine drives the heat pump and takes in heat from a thermal energy reservoir at 1113K and dumps the heat to a reservoir at 333K. The heat pump works on a Carnot cycle and absorbs heat from the thermal energy reservoir at 278K and rejects the heat to a reservoir at 333K.The heat engine is also being used to operate a machine which takes in 30 kW. If the rate of extraction of the heat pump from its initial reservoir is at 17 kJ/s, calculate the ff:- What is the rate of extraction of heat from the heat engine? - What is the rate of the rejection of heat from the 333K reservoir?
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.
A completely reversible refrigerator is driven by a 10-kW compressor and operates with thermal energy reservoirs at 250 K and 300 K. Calculate the rate of cooling provided by this refrigerator