A Carnot heat engine operates between a source at 1000 K and a sink at 300 K. If the heat engine is supplied with heat at a rate of 800 kJ/min, determine the thermal efficiency 70% O 72% O 75% O 80% O
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- Provide complete solution and detailed diagram. The thermodynamic efficiency of a heat engine that rejects heat at a rate of 20 MW when heatis supplied to it at a rate of 60 MW is: A. 33.3% B. 50% C. 66.7% D. 75%Provide complete solution and detailed diagram. A refrigerator is to remove heat from the cooled space at a rate of 300 KJ/min to maintain itstemperature at - 8oC. If the air surrounding the refrigerator is 25oC, determine the minimum powerrequired for this refrigerator? A. 0.263 kw B. 0.473 kw C. 0.623 kw D. 0.984 kwA heat engine has a thermal efficiency of 70%. During each cycle the engine does 400J of work. What is the magnitude of waste heat rejected to the low temp reservoir?
- In a meat processing plant, it is required to cool 1500 kg of beef whose specific heataverage is 3.14 kJ/kg-°C to lower its temperature from 39 °C to 2 °C in 14 hours. It is required to estimate theenergy requirements necessary for meat cooling capacity, assuming that the cooling systemRefrigeration operates on an ideal vapor compression refrigeration cycle. A refrigeration unit is chosenwith refrigerant 134a with a condenser pressure of 1.4 MPa and an evaporator pressure of 240 kPa.Assume that the refrigerant enters the compressor as a saturated vapor and leaves the condenser as a saturated liquid.Calculate:a) The COPR or CDFR,b) The mass flow of the refrigerantc) The energy dissipated into the atmosphered) The cost of annual electrical energy, if the plant will operate with a load factor (FC) of 85% (100%-FC =8760 h/year). Consider the unit cost of electrical energy of $2.6 per kWh and the efficiency of the system90% motor-compressor.A refrigeration system operated on an ideal vapor-compression using R-12 with a vaporizing temperature of -10 degrees Celsius and a condensing temperature of 30 degrees Celsius, it requires 15 hp to drive the motor of the compressor. Find the ff: Enthalpies at each point of the cycle in kJ/kg Refrigerating Capacity in TOR • Mass of the Refrigerant in kg/s Percent Quality in the mixture Heat Rejected in kW Coefficient of Performance • Schematic and P-h DiagramA heat pump operates with Refrigerant 134a as the working fluid. You are required to analyze its performance, and compare it with Camot heat pump. The data of the heat pump is as under: 23 - Thermodynamies-II Page 1 of 3 The heat pump is presently providing heating at a rate of 12 kW to maintain the interior of a building at 20°C. Outside temperature is 5°C. The refrigerant enters the compressor at 2.4 bar and increases the pressure to 8.0 bar. Efficiency of the compressor is 80%. a Temperatures at the principal states of the cycle, each °C b. Power input to the compressor, in kW c. Coefficient of performance Relate its performance with the specifications provided by the vendor i.e. COP = 8.5 and identify the possible reasons of differences. Draw Ts diagram
- please answers fasterrr An ice-making machine in Restoran Syed operates on the vapor-compression refrigeration cycle. Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.13MPa and a °C at a rate of 0.13kg/s, and it leaves at 0.7 MPa and b °C. The refrigerantis cooled in the condenser to c°C and dMPa, and it is throttled to 0.14MPa. Disregarding any heat transfer and pressure drops in the connecting lines between the components, show the cycle on a T-s diagram with respect to saturation lines, and determine;i.the rate of heat removal from the refrigerated space,ii.the power input to the compressor, iii.the isentropic efficiency of the compressor, and iv.the COP of the refrigerator.v.if the compressor has no irreversibility, how about the COP?vi.Justify the difference between ideal and actual cycles. a= -8 b= 49 c= 25 d= 670التاريخ show that if two bodies of thermal Capacities C and C at temp. brought to the a reversi ble heat engine , then eratures T and Tz are Same tomperature T by means of a In T= c, In Ti + Ca ln Ta C+C2A power plant was analysed based on Carnot cycle, the evaporator supplie 553 kJ of heat per cycle at 522°C and condenser cooling fluid was maintained1- at 26°C. Determine the thermal efficiency of this Carnot engine in percentage? Provide answer to 1 decimal place and insert the unit symbol. 1 °C is 273K in this question if required.
- A Carnot heat pump maintains a horne at 23 C during the cold season. At an average of -2C outsde emperdure, the house loses heat at a rate of 50,000 M/h. X this heat pump consumes 5 kW of power during operation, calculate (a) how ling the hed pump ran on thd day; (b) the total heating costs, assuming an average price of P12.67lkWh for ebctricity.Consider a heat engine undergoing a power cycle. a. What is the maximum thermal efficiency that an ideal heat engine can achieve ifit operates between thermal reservoirs at 1000K and 300K? b. What is the maximum possible power output from the heat engine if operating between the same two temperatures of part (a) and the heat transfer rate in to the cycle is 140 MW?A power plant was analysed based on Carnot cycle, the evaporator supplie 474 kJ of heat per cycle at 510°C and condenser cooling fluid was maintained 1- at 22°C. Determine the thermal efficiency of this Carnot engine in percentage? Provide answer to 1 decimal place and insert the unit symbol. 1 °C is 273K in this question if required.