An engine works with two reservoirs: Ta at 400 degrees Celsius and the other Tb at 200 degrees Celsius. It goes through processes with first adiabatic compression absorbing 150 J then isothermal expansion on Ta then adiabatic expansion then isothermal compression on Tb. Output of the engine operates between the same two reservoirs, with adiabatic expansion, then isothermal expansion at Tbthen adiabatic compression then isothermal compression at Ta. Output of engine runs refrigerator. How much work is completed by compressing the refrigerant? Released by the engine to cold reservoir? How

An engine works with two reservoirs: Ta at 400 degrees Celsius and the other Tb at 200 degrees Celsius. It goes through processes with first adiabatic compression absorbing 150 J then isothermal expansion on Ta then adiabatic expansion then isothermal compression on Tb. Output of the engine operates between the same two reservoirs, with adiabatic expansion, then isothermal expansion at Tbthen adiabatic compression then isothermal compression at Ta. Output of engine runs refrigerator. How much work is completed by compressing the refrigerant? Released by the engine to cold reservoir? How

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 2RQ: The operating condition for the single compressor in a household refrigerator is the lowest box...

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A Carnot engine operating between 70°C and 2000°C is modified solely by raising the high temperature by 150°C and raising the low temperature by 100°C. Which of the following statements is false? a. The thermodynamic efficiency is decreased b. Network is increased. c. More heat is absorbed during vaporization. d. More work is done during the reversible adiabatic expansion
An engine works with two reservoirs: Ta at 400 degrees Celsius and the other Tb at 200 degrees Celsius. It goes through processes with first adiabatic compression absorbing 150 J then isothermal expansion on Ta then adiabatic expansion then isothermal compression on Tb. Output of the engine operates between the same two reservoirs, with adiabatic expansion, then isothermal expansion at Tbthen adiabatic compression then isothermal compression at Ta. Output of engine runs refrigerator. Suppose temperature is 30 degrees Celsius, and the hot reservoir has spherical tank with a radius of 6.00 m, acting as radition emitter. If all energy emitted by the tank could be contained, what is average amount of work that could be completed each second?
All reversible heat engines operating between the same two reservoirs have the same efficiency (the second Carnot principle).
When a man returns to his well-sealed house on a summer day, he finds that the house is at 35°C. He turns on the air conditioner, which cools the entire house to 20°C in 30 min. If the COP of the air-conditioning system is 2.8, determine the power drawn by the air conditioner. Assume the entire mass within the house is equivalent to 800 kg of air for which cv = 0.72 kJ/kg·°C and cp = 1.0 kJ/kg·°C.
Qsn2 ) Determine the heat need to be supplied for a Carnot engine operating between 600°C and 40°C and producing 300 kJ of work.
A cycle operates on air occurs as follows: an isentropic compression 1-2, a constant-pressure expansion 2-3, an isentropic expansion 3-4, and finally a constant volume cooling 4-1. The ratio of compression is 14, the ratio of expansion during constant-pressure expansion is 2, P1=47kPa, T1=32o C, V1=0.2m3. a. Find the heat added b. Find the heat rejected c. Find the work on each process and the net work
12- Enver Gezer sees that there is 32 ºC in the summer house and after operating the air conditioner, the temperature of the house becomes 20 ºC in 15 minutes. Calculate the electrical power drawn by the system since the air conditioning system has a COP of 2.5. The mass of the Air in the house is 800 kg. For air (CV: 0.72 kJ/kg ºC and Cp: 1.0 kJ/kg ºC) A-3,265 kWB-5,492 kWC-3,897 kWD-5,046 kWE-3,072 kW (Note: This question is Turkish) orginal question: 12- Enver Gezer yazın evinde 32 ºC olduğunu görmekte ve Klimayı çalıştırdıktan sonra evin sıcaklığı 15 dakika içerisinde 20 ºC olmaktadır. iklimlendirme sisteminin COP değeri 2.5 olduğuna göre sistemin çektiği elektrik gücünü hesaplayın . Evin içerisindeki Havanın kütlesi 800 kg dır. Hava için (CV :0.72 kJ/kg ºC ve Cp : 1.0 kJ/kg ºC )
A Carnot engine receives 130 BTU of heat from a hot reservoir at 700 F and rejects 49 BTU of heat. Calculate the temperature of the cold reservoir. what is the answer a. -24.2°F b. -21.9°F c. -22.7°F d. -20.8°F
7 . Calculate the work of a steam turbine with the following thermodynamic parameters: Enthalpy in = 1500 Btu/lbm Enthalpy out = 1053 Btu/lbm Velocity in = 125 ft/sec Velocity out = 130 ft/sec Inlet nozzle is 8 ft above the turbine Heat loss inside the turbine is 10 Btu/lbm
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Consider a variation of the Carnot cycle in a closed system with 10 kg of pure water operating. ranging between temperatures of 130 C and 350 ◦C. State 1 is a saturated liquid. Process 1-2 is a isothermal expansion with a supply of QH = 10 MJ. Process 2-3 is an adiabatic expansion with isentropic efficiency from 0.75 to minimum temperature. Process 3-4 is a compression isothermal, and the 4-1 process is a reversible adiabatic compression. Calculate: a. The pressure p2, the bonds x4 and x3, and the specific entropies s1 and s3; b. The work in each expansion and compression process; c. The heat rejected QL, the net work produced Wl i q and the yield η of the cycle; d. The entropy generated Sg in the cycle
1.) A Carnot power cycle employing 1 lb of air as a working substance is pressumed to operate between temperature limits of 600 F and 70 F . The pressure at the beginning and end of isothermal expansion process are 510 psia and 170 psia respectively Determine: A.) The change of volume between the end of isentropic expansion and the end of isentropic compression , ft *3/lb . B.) The heat supplied to the cycle , Btu/ lb C.) The heat rejected to the cycle , btu/ lb D.) The net work of the cycle , btu . lb E.) The cycle thermal efficiency , %