Q1: What is the cycle efficiency of an ideal Rankine cycle with Refrigerant R134a operating between 8 bar and 1 bar and...
Q1: What is the cycle efficiency of an ideal Rankine cycle with Refrigerant R134a operating between 8 bar and 1 bar and at a maximum cycle temperature of 150C?
Q2: Suggest a condenser pressure for an ideal Rankine cycle using water as a working fluid that uses a lake as a thermal reservoir to reject heat to if the lake can sometimes reach temperatures of 25C. The pressure should be chosen to maximize cycle efficiency
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Q1: What is the cycle efficiency of an ideal Rankine cycle with Refrigerant R134a operating between 8 bar and 1 bar and...
8.12 Water is used as the working fluid in an ideal Rankine cycle. The steam is supplied as superheated steam at 30 bar,...
8.12 Water is used as the working fluid in an ideal Rankine cycle. The steam is supplied as superheated steam at 30 bar, 440°C. The condenser pressure is 0.5 bar. If isentropic efficiency of turbine and pump are 90% and 85%, respectively, determine the thermal efficiency of the cycle.
Tutorial Questions 1 1. Water is the working fluid in an ideal Rankine cycle. The condenser...
Tutorial Questions 1.1. Water is the working fluid in an ideal Rankine cycle. The condenser pressure is kPa, and saturated vapor enters the turbine at 10 MPa. Determine the heat transfer rates, in kJ per kg of steam flowing, for the working fluid passing through the boiler and condenser and calculate the thermal efficiency.2. Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 16 MPa, and the condenser pressure is 8 kPa ....
Refrigeration Question 1 a) A refrigerant R134a refrigerator is to maintain the refrigerated spac...
Refrigeration Question 1 a) A refrigerant R134a refrigerator is to maintain the refrigerated space at -100C. Would you recommended an evaporator pressure of 1.6 bar or 2 bar for this system? Why? -la An automotive Air conditioner using refrigerant R134a as the working fluid and operating on ideal vapor compression refrigerant cycle is to maintain a space at 24°C while operating its condenser at 1000 kPa. Determine the COP of the system when a temperature difference of 14°C is allowed...
An ideal reheat Rankine cycle with water as the working fluid operates the inlet of the...
An ideal reheat Rankine cycle with water as the working fluid operates the inlet of the high-pressure turbine at 8000 kPa and 450°C, the inlet of the low-pressure turbine at 300kPa and 500°C, and the condenser at 10 kPa. Determine the mass flow rate through the boiler needed for this system to produce a net 5000 kW of power and the thermal efficiency of the cycle.
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid....
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits...
A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits of 15 MPa in the boiler and 100 kPa in the condenser. Saturated steam enters the turbine. Determine the work produced by the turbine, the heat transferred in the boiler, and thermal efficiency of the cycle. As part of your solution, sketch a simplified diagram of the cycle, labelling each component, indicating where heat and work flows into or out of the system, and...
3. (40 pts) A steam power plant based on the Rankine cycle, shown in the below,...
3. (40 pts) A steam power plant based on the Rankine cycle, shown in the below, operates to develop net cycle power. Saturated vapor at 8 bar enters the turbine where it expands to the condenser pressure of 1 bar. Water liquid exits the condenser 30 °C and 1 bar and it is pumped to the boiler pressure of 8 bar. Isentropic efficiencies of the turbine and pump are 80% and 60%. Assume kinetic and potential energies are negligible at...
Steam is the working fluid in a simple, ideal Rankine cycle. Saturated vapor enters the turbine...
Steam is the working fluid in a simple, ideal Rankine cycle. Saturated vapor enters the turbine at 8 MPa and saturated liquid exits the condenser at a pressure of 8 kPa. The net power output of the cycle is 100 MW. Determine for the cycle: i. Thermal efficiency ii. Back work ratio iii. Mass flow-rate of the steam in kg/h iv. Rate of heat transfer to the working fluid as it passes through the boiler in MW v. Rate of...
Steam Plant working on ideal Rankine Cycle has the following data: boiler pressure 60 bar; condenser...
Steam Plant working on ideal Rankine Cycle has the following data: boiler pressure 60 bar; condenser pressure 0.1 bar. The steam enters the turbine dry saturated. Determine: i) the quality of the steam leaving the turbine; ii) the cycle efficiency; iii) the work ratio; and iv) Specific Steam Consumption
An ideal reheat Rankine cycle with water as the working fluid operates the boiler at 20,000...
An ideal reheat Rankine cycle with water as the working fluid operates the boiler at 20,000 kPa, the reheater at 2000 kPa, and the condenser at 100 kPa. The temperature is 450 C at the entrance of the high-pressure and low-pressure turbines. The mass flow rate through the cycle is 1.74 kg/s. Determine the power used by pumps, the power produced by the cycle, the rate of heat transfer in the reheater, and the thermal efficiency of this system. Use...
Refrigeration Question 1 a) A refrigerant R134a refrigerator is to maintain the refrigerated space at -100C. Would you recommended an evaporator pressure of 1.6 bar or 2 bar for this system? Why? -la An automotive Air conditioner using refrigerant R134a as the working fluid and operating on ideal vapor compression refrigerant cycle is to maintain a space at 24°C while operating its condenser at 1000 kPa. Determine the COP of the system when a temperature difference of 14°C is allowed...
An ideal vapor-compression refrigerant cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at -10°C, and saturated liquid leaves the condenser at 28°C. The mass flow rate of refrigerant is 5 kg/min. Determine (a) The compressor power, in kW (b) The refrigerating capacity, in tons. (c) The coefficient of performance. Sketch the system on a T-s diagram with full label. A vapor-compression heat pump with a heating capacity of 500 kJ/min is...
A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits of 15 MPa in the boiler and 100 kPa in the condenser. Saturated steam enters the turbine. Determine the work produced by the turbine, the heat transferred in the boiler, and thermal efficiency of the cycle. As part of your solution, sketch a simplified diagram of the cycle, labelling each component, indicating where heat and work flows into or out of the system, and...
3. (40 pts) A steam power plant based on the Rankine cycle, shown in the below, operates to develop net cycle power. Saturated vapor at 8 bar enters the turbine where it expands to the condenser pressure of 1 bar. Water liquid exits the condenser 30 °C and 1 bar and it is pumped to the boiler pressure of 8 bar. Isentropic efficiencies of the turbine and pump are 80% and 60%. Assume kinetic and potential energies are negligible at...
An ideal reheat Rankine cycle with water as the working fluid operates the boiler at 20,000 kPa, the reheater at 2000 kPa, and the condenser at 100 kPa. The temperature is 450 C at the entrance of the high-pressure and low-pressure turbines. The mass flow rate through the cycle is 1.74 kg/s. Determine the power used by pumps, the power produced by the cycle, the rate of heat transfer in the reheater, and the thermal efficiency of this system. Use...
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