It's a thermodynamics question. (a) A reversible heat engine operates in the indicated cycle on a T-S diagram, in whichT is in K and S is in J/K. What is the efficiency of the engine? (I want an explicitnumber)T(K) A400300500S(JIK)1000(b)A heat engine operates between two finite thermal reservoirs initially at temperatures T1and T2>T1. The reservoirs have the same total heat capacities, each equal to C. Bothreservoirs gradually come to the same final temperature T3, at which time the heat enginestops working. Present an argument to show that T3 2 (T1.T2)/². What maximum work isobtainable from the process?

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Answered: A reversible heat engine operates in…

A reversible heat engine operates in the indicated cycle on a 1-5 diagram, in which in K and S is in J/K. What is the efficiency of the engine? (I want an explicit

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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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
1.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: a) Enthalpies corresponding to the states indicated in the cycle (1, 2, 3 and 4); b) The cooling rate (Q L ); c) The work supplied to the fluid by the compressor; d) The work generated by the turbine; e) The condenser heat rejection rate (Q H ); f) The coefficient of performance of the cycle. Important detail: For the energy balance, make the following considerations: ✓ Permanent regimen; ✓ Kinetic and potential energy variations are negligible; ✓ Compressor and turbine operate adiabatically; ✓ Evaporation and condensation steps are labor-free.
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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.
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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.
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;Response
A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-compression refrigeration cycle between 0.12 and 0.7 MPa. The mass flow rate of the refrigerant is 0.05 kg/s. Determine:a) the rate of heat removal from the refrigerated space (kW),b)the power input to the compressor (kW),c) the rate of heat rejection to the environment (kW), andd) the coefficient of performance.Submit your solution by multiplying (a)*(b)*(c)*(d) = _________.
What is the highest possible theoretical efficiency of a heat engine operating with a hot reservoir of furnacegases at 2000°C when the cooling water available is at 10°C ?
The schematic of a single-flash geothermal power plant with state numbers is given in Fig. P7-73. Geothermal resource exists as saturated liquid at 230°C. The geothermal liquid is withdrawn from the production well at a rate of 230 kg/s, and is flashed to a pressure of 500 kPa by an essentially isenthalpic flashing process where the resulting vapor is separated from the liquid in a separator and directed to the turbine. The steam leaves the turbine at 10 kPa with a moisture content of 10 percent and enters the condenser where it is condensed and routed to a reinjection well along with the liquid coming off the separator. Determine (a) the mass flow rate of steam through the turbine, (b) the isentropic efficiency of the turbine, (c) the power output of the turbine, and (d) the thermal efficiency of the plant (the ratio of the turbine work output to the energy of the geothermal fluid relative to standard ambient conditions).