1. An ideal Ericsson engine using helium as the working fluid operates between temperature limits of 600 R and 3500 R and pressure limits of 20 and 250 psia. Assuming a mass flow rate of 20 Ibm/min, determine (a) the thermal efficiency of the cycle, (b) the heat transfer rate in the regenerator in Btu/min (c) the power delivered in hp
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- Why is two-stage compression popular for extra-low-temperature refrigeration systems?An ideal Rankine cycle operates between the pressure limits of 15,000 kPa in the boiler and 15 kPa in the condenser. If the turbine inlet temperature is 500 deg C and the cycle produces 2500 kW of net work, determine the mass flow rate of the steam in kg/s. Refer to the tables below. a. 1.993 b. 2.122 c. 1.856 d. 2.016A Rankine cycle is characterized by turbine inlet conditions of 1500 psia and 1000F. The condenser pressure is 1 psia. The heat transfer to the steam in the boiler occurs at the rate of 7x 106 Btu/sec. The cooling water in the condenser increases in temperature from 70° to 85°F. Determine the following: 1. the net power produced, the cooling-water flow rate in gal/min and the cycle thermal efficiency.
- 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;ResponseRefrigerator 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.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;
- A medium size power station is used to produce 30 MW net power for a refinery. The station uses steam as the operating fluid and operates according to the Carnot cycle between the pressure limits of 0.4 bar and 35 bar. Steam enters the boiler as a saturated liquid and leaves it as a dry saturated vapour.(v) Calculate the specific heat provided to the boiler, the specific work extracted from the power station and the mass flow rate of the steam circulating in the cycle1.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.Thermodynamics Answer the following questions with complete solutions. write legibly An engine operates with air on the cycle shown with isentropic processes 1 - 2 and 3 - 4, and constant volume processes at 2 - 3 and 4 - 1. If the compression ratio (r) is 12, the minimum pressure is 200 kPa, and the maximum pressure is 10 MPa, determine the net cycle work (Wcycle) in terms of the final volume of isentropic compression process (V2). (Note: r = V1/V2 = V4/V3).
- A vapor compression refrigeration cycle operates at steady flow conditions with 0.25 kg/s or R-134a. The table below shows some of the operating parameters and properties for the refrigerant. The compressor is réfrigerated, and the condenser is also cooled with water. The compressor receives shaft power equivalent to 7.5 hp. Neglecting changes in kinetic and potential energy changes and any heat loss between devices, please answer the following. a. Complete the table below and sketch the cycle processes on a T-s diagram. When completing the table please use the same number of decimal places as in the tables. b. 123456 Determine the cooling capacity of the refrigeration unit, in Tons (1 refrigeration Ton=211 kJ/min). c. Compute the COP d. Determine the volume flow rate of refrigerant entering the condenser in L/min. e. Determine the mass flow rate of cooling water passing through the condenser. 1. Determine the heat transfer rate from the compressor. g. Compute the rate of entropy…A vapor compression refrigeration cycle operates at steady flow conditions with 0.25 kg/s or R-134a. The table below shows some of the operating parameters and properties for the refrigerant. The compressor is refrigerated, and the condenser is also cooled with water. The compressor receives shaft power equivalent to 7.5 hp. Neglecting changes in kinetic and potential energy changes and any heat loss between devices, please answer the following. a. Complete the table below and sketch the cycle processes on a T-s diagram. When completing the table please use the same number of decimal places as in the tables. 123456 b. Determine the cooling capacity of the refrigeration unit, in Tons (1 refrigeration Ton = 211 kJ/min). c. Compute the COP. d. Determine the volume flow rate of refrigerant entering the condenser in L/min. e. Determine the mass flow rate of cooling water passing through the condenser. f. Determine the heat transfer rate from the compressor. g. Compute the rate of entropy…A medium size power station is used to produce 30 MW net power for arefinery. The station uses steam as the operating fluid and operatesaccording to the Carnot cycle between the pressure limits of 0.4 bar and35 bar. Steam enters the boiler as a saturated liquid and leaves it as adry saturated vapour. (i) List the name of the four processes in a generic Carnot cycle andstate what type of energy transfer (work/heat) can be neglectedin each process. (ii) Determine the dryness fraction of the steam that is fed to thecondenser, and the specific enthalpy values at the four key points ofthe cycle. (iii) Calculate the specific heat provided to the boiler, the specificwork extracted from the power station and the mass flow rate ofthe steam circulating in the cycle, then, determine the thermal efficiency of the cycle.