A thermodynamic cycle receives 150 J of heat from a cold reservoir and rejects 165 J of heat to a hot reservoir. What is its coefficient of performance as a refrigeration cycle, (B) ?
Q: A reversible heat engine operates between two reservoirs: one at T = 395.0°C and another at Te =…
A: Given: Th=395 °CTC=150 °CQ1=125 kJ
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Q: 3.0 A Carnot cycle operates between source and sink temperatures of 260°C and - 17.8°C. If the…
A: Given: The source temperature, T1 = 260 C The sink temperature, T2 = -17.8oC The heat receives from…
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Q: A heat engine operates on a Carnot cycle between source and sink temperatures of 260°C and – 17.8°C.…
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Q: A Carnot cycle operates between source and sink temperatures of 260°C and – 17.8°C. If the system…
A: Given data Source temp (Th) = 260oC = 260 + 273 = 533 K Sink Temp…
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A: Given: The power consumes by the air conditioner is P=1 kW. The coefficient of performance is COP=3.
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A: Data given- Q = 850 kJ T1 = 550 K W = 300 kJ T2 = 350 K
Q: A reversible heat engine operates between two reservoirs: one at Th = 395.0°C_and another at Te =…
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Q: Refrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator…
A: Refrigerant=R22Evaporator temperature, Te=-30oCCondenser temperature, Tc=36oCThe mass flow rate of…
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Q: A reversible heat engine operates between two reservoirs: one at T 395.0°C and another at 1) a. Te…
A: We are suppose to solve only 3 subparts. Please post other parts as a separate question.
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A: Given:m=2 KgP1=2 MpaT1=400°CP2=0.6 MPah1=3247.6 KJ/Kgs1=7.1271 KJ/Kg
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Q: Refrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator…
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Q: A reversible heat engine operates between two reservoirs: one at Th = 395.0°C and another at Te =…
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Q: A reversible heat engine operates between two reservoirs: one at Th = 395.0°C and another at Te =…
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Q: A reversible heat engine operates between two reservoirs: one at Th = 395.0°C and another at Te =…
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Q: A Carnot vapor refrigeration cycle operates between thermal reservoirs at 40 ⁰F and 100 ⁰F.…
A: Given data: TL=40°F=277.594 KTH=100°F=310.928 K Need to determine the coefficient of performance.
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Q: The heat pump is presently providing heating at a rate of 12 kW to maintain the interior of a…
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Q: Refrigerant 22 is the working fluid in a Carnot refrigeration cycle operating at steady state. The…
A: Given data Refrigerant : R22 Cycle : Carnot refrigeration cycle Condenser temperature : 36°C…
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Q: Refrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator…
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Q: Consider a refrigerator and a heat pump working on the reversed Carnot cycle between the same…
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Q: Q2/ P1= 30 bar , T1=400 °C P3= 0.1 bar, P2=5bar The feed water heater is a direct contact type Find…
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Q: 1.Refrigerator 1 simulates an ideal refrigerator and therefore operates on a Carnot cycle using…
A: Given Data Tc=30°C Te=-10°C Mass flow rate of R-134a=1.4 kg/s
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- A Carnot vapor refrigeration cycle operates between thermal reservoirs at 40 ⁰F and 100 ⁰F. Determine the coefficient of performance.An air conditioner is a device used to cool the inside of a home. It is, in essence, a refrigerator in which mechanical work is done and heat removed from the (cooler) inside and rejected to the (warmer) outside. A home air conditioner operating on a reversible Carnot cycle between the inside, absolute temperature T2, and the outside, absolute tempera- ture T1 > T2, consumes P joules/sec from the power lines when operating continuously. (a) In one second, the air conditioner absorbs Q2 joules from the house and rejects Q1 joules outdoors. Develop a formula for the efficiency ratio Q2/P in terms of T1 and T2. (b) Heat leakage into the house follows Newton's law Q = A(T, – T2). Develop a formula for T, in terms of T1, P, and A for continuous operation of the air conditioner under constant outside temperature T and uniform (in space) inside temperature T2. (c) The air conditioner is controlled by the usual on-off thermostat and it is observed that when the thermostat set at 20°C and an…Explain the first laws of thermodynamics for process and also for cycle?
- True or false Heat is transferred to a system by either a cheap commercially available air-sourced heat pump with coefficient of performance of just 1.5, or an expensive 100% efficient electrical resistance heater. The loss of Carnot Work Potential (Exergy destruction, or T0Sloss term) is minimum when heat is added by the cheap commercial heat pump. Heat is transferred to a system by either a cheap commercially available air-sourced heat pump with coefficient of performance of just 1.5, or an expensive 100% efficient isothermal heat source. The loss of Carnot Work Potential (Exergy destruction, or T0Sloss term) is minimum when heat is added by the isothermal heat source.4. Two and one-half pounds of air actuate a cycle composed of the following processes: polytropic compression 1-2, with n = volume 3-1. The known data are: D1 = 20 psia, ti = 100°F, Qr = -1682 Btu. Determine (a) T2 nd Ts, (b) the work of the cycle using the pV plane, in Btu; (c) Qu (d) the thermal 1.5; constant pressure 2-3; constant efficiency, and (e) pn. Ans. (a) 1120°R, 4485°R; (b) 384.4 Btu; (c) 2067 Btu; (d) 18.60%: (e) 106.8 psiaA R-134a home refrigerator operates on a simple cycle at pressures 1.8 bar-abs and 7.5 bar-abs. The refrigerant mass flow-rate is 0.005 kg/s. Fill up Tables 3a and 36. Part 3. Calculation: Performance of a Simple Refrigeration Cycle. Table Ja. Selected Thermodynamic properties of R-134a refrigerant according to the given cycle. kJ/ kg a Specific Enthalpy at suction A Specific volume at suction m/ kg kJ /g-K e Specific entropy at suction d Specific enthalpy at discharge Specific enthalpy after expansion hs4 31 kJ/ kg kJ / kg Table 3b. Performance of the home refrigerator according to its cycle of operation. kWatt a. Evaporator cooling capacity b Condenser heat rejection rate Q Cond kWatt Power required by compressor W Comp C. kWatt d Volume displacement of compressor e. Coefficient of Performance-Ref VCamp Li/s COP Ref f Coefficient of Performance-Canot COP RC & Flash-gas formed after expansion X4 kg / kg %3D
- (iii) What is the difference between a refrigerator and a heat pump?Consider a refrigerator and a heat pump working on the reversed Carnot cycle between the same temperature limits. Which of the following is correct? (a) COP of refrigerator = COP of heat pump (b) COP of refrigerator = COP of heat pump + 1 c) COP of refrigerator = COP of heat pump -1 (d) COP of refrigerator = Inverse of the COP of heat pump %3D %3D %3D %3DA heat engine operates on a Carnot cycle between source and sinktemperatures of 260°C and – 17.8°C. If the system receives 100 kJ fromthe source, find (i) efficiency of the system, (ii) the network transfer, (iii)heatrejected to the sink.
- 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)?Choose the correct answer: 1. In a closed or dense air refrigeration cycle, the operating pressure ratio can be reduced, which results in............ coefficient of performance. (a) lower (b) higher 2- The efficiency of Carnot heat engine is 80%. The C.O.P. of a refrigerator operating on the reversed Carnot cycle is equal to (a) 0.25 9- (b) 0.40 (c) 0.60 (d) 0.80 3. In a refrigerating machine, if the lower temperature is fixed, then the C.O.P. of the machine can be increased by (a) increasing the higher temperature (c) operating the machine at a lower speed (b) decreasing the higher temperature (d) operating the machine at a higher speed 4. The highest temperature during the cycle, in a vapour compression refrigeration system, occurs after (a) compression (b) condensation (c) expansion (d) evaporation 5- A system with multiple evaporators at different temperatures with compound compression will (a) increase the power requirements (b) reduce the power requirements (c) neither increase…Data are provided for two reversible refrigeration cycles. One cycle operates between hot and cold reservoirs at 27°C and 3°C, respectively. The other cycle operates between the same hot reservoir at 27°C and a cold reservoir at -35°C. The refrigerator removes the same amount of energy by heat transfer from its cold reservoir. Determine the ratio of the net work input values of the two cycles, WCycle,2 Wcycle,1