A reversible heat engine rejects 50 percent of the heat supplied during a cycle of operation. If this engine is reversed and operates as a heat pump, then what is its coefficient of performance?
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- 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.Refrigerant 134a enters the compressor of a refrigerator as superheated vapor at 0.20 MPa and -5 ° C at a rate of 0.7 kg / s, and exits at 1.2 MPa and 70 ° C. The refrigerant is cooled in the condenser to 44 ° C and 1.15 ° C. MPa, and throttles at 0.2 MPa. Neglecting any heat transfer and any pressure drop in the connecting lines between the components, show the cycle on a Ts diagram with respect to the saturation lines, and determine (a) the rate of heat removal from the refrigerated space and the inlet power to the compressor, b) the isentropic efficiency of the compressor, c) the COP of the refrigerator, d) show the Ts and Ph diagrams with all pointsIn an ideal Otto cycle, the ratio of the maximum volume to the minimum volume is 8. The maximum temperature of the cycle is 1,290 K while the minimum temperature is 301 K. Determine the work net in kJ/kg. Use k = 1.4, Cv = 0.718 kJ/kg-K and Cp = 1.005 kJ/kg-K. For the final answer, use two decimal places.
- Refrigerator 1 simulates an ideal refrigerator and therefore operates on a Carnot cycle using R-134a as the refrigerant at a flow rate of 1.4 kg/sec. The condensing and evaporating temperatures are 30 °C and -10 °C, respectively. To assess the performance of Refrigerator 1, you must submit the report. of the project with the following information: d) The work generated by the turbine; e) The condenser heat rejection rate (Q H); f) The coefficient of performance of the cycle.A gas turbine power plant operates on a standard air cycle between extreme pressures of 1 and 6.4 bar. The inlet air temperature is 22°C and the turbine inlet limit temperature is 807°C. The adiabatic efficiencies of the compressor and the turbine are 0.82 and 0.85, respectively. If a regenerator with an efficiency of 0.80 is installed and two ideal stages are used in compression and expansion, determine the thermal efficiency.A Carnot heat engine, shown in Fig. 6–47, receives 500 kJ of heat per cycle from a high-temperature source at 652°C and rejects heat to a low-temperature sink at 30°C. Determine the thermal efficiency of this Carnot engine.
- mechanical engineering, If a reversed Carnot cycle operates between the temperature limits of 27°C and -3°C, then what is the ratio of the COP of a refrigerator to that of a heat pump?A heat engine is supplied with 278 kJ/s of heat at a constant 6fixed temperature of 283°C and the heatrejection takes place at 5°C. The following results werereported: (i) 208 kJ/s are rejected, (ii) 139 kJ/s arerejected, (ii) 70 kJ/s are rejected.Classify which of the results report a reversible cycle orirreversible cycle or impossible results.What are the types of thermodynamic cycle as to the type of output? Define each.
- Refrigerator 1 simulates an ideal refrigerator and therefore operates on a Carnot cycle using R-134a as the refrigerant at a flow rate of 1.4 kg/sec. The condensing and evaporating temperatures are 30 °C and -10 °C, respectively. To assess the performance of Refrigerator 1, you must submit the report. of the project with the following information: Enthalpies corresponding to the states indicated in the cycle (1, 2, 3 and 4); 1.a. The cooling rate (QL); 1.b. The work provided to the fluid by the compressor; 1.c. The work generated by the turbine; 1.d. The condenser heat rejection rate (QH); 1e. The coefficient of performance of the cycle;Refrigerator 1 simulates an ideal refrigerator and therefore operates on a Carnot cycle using R-134a as the refrigerant at a flow rate of 1.4 kg/sec. The condensing and evaporating temperatures are 30 °C and -10 °C, respectively. To assess the performance of Refrigerator 1, you must submit the report. of the project with the following information: Enthalpies corresponding to the states indicated in the cycle (1, 2, 3 and 4); 1.a. The cooling rate (QL);Response 1.b. The work provided to the fluid by the compressor;Response 1.c. The work generated by the turbine;Response 1.d. The condenser heat rejection rate (QH);Response 1 and. The coefficient of performance of the cycle;ResponseCalculate the thermal efficiency of a Carnot cycle heat engine operating betweenreservoirs at 300℃ and 45℃