A Steam Power Plant operates on the Rankine Cycle in which steam at 22 bar and dryness fraction of 0.95 enters the turbine and exhausts to a pressure of 0.1 bar in a condenser. The condensate is pumped as feedwater to the Boiler in which the steam is generated. Sketch the T-s diagram for this cycle and calculate the following performance parameters: (i) Cycle Thermal Efficiency (ii) Specific Steam Consumption (iii) Condenser Heat Load (iv) Cooling Water mass and volumetric flow rates for the condenser if the cooling water enters at 26 oC and leaves at 40 oC for a net power output of 24,000 kW. The specific heat capacity of the cooling water can be taken as 4.0 kJ/kg K and its density as 1023 kg/m3.

A Steam Power Plant operates on the Rankine Cycle in which steam at 22 bar and dryness fraction of 0.95 enters the turbine and exhausts to a pressure of 0.1 bar in a condenser. The condensate is pumped as feedwater to the Boiler in which the steam is generated. Sketch the T-s diagram for this cycle and calculate the following performance parameters: (i) Cycle Thermal Efficiency (ii) Specific Steam Consumption (iii) Condenser Heat Load (iv) Cooling Water mass and volumetric flow rates for the condenser if the cooling water enters at 26 oC and leaves at 40 oC for a net power output of 24,000 kW. The specific heat capacity of the cooling water can be taken as 4.0 kJ/kg K and its density as 1023 kg/m3.

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

Chapter22: Condensers

Section: Chapter Questions

Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...

See similar textbooks

Similar questions

Define flash gas, and explain how it applies to the net refrigeration effect of the refrigeration cycle.
A power station consists of a four-unit coal fired power station, having a combined capacity of 2,880 MW. The current efficiency of each unit is around 37.7%. You are asked to improve the thermal efficiency of each unit by lowering the condenser pressure. To simplify this task, assume that each unit operates on a simple ideal Rankine cycle. If the superheated vapour enters the turbine at 10 MPa and 500 ֯C and is cooled in the condenser at a lower pressure 10 kPa, determine the quality of the steam at the turbine exit and the thermal efficiency of the cycle for one unit.
1. In a Rankine cycle, steam enters the turbine at 2.5 MPa and condenser of 50 kPa.What is the thermal efficiency of the cycle? 2. Steam enters the superheater of a boiler at a pressure of 25 bar and dryness of 0.98 and leaves at the same pressure at a temperature of 370OC. Calculate the heat energy supplied per kg of steam supplied in the superheater. Kindly answer question 1 and 2 and show solution. Please help me. Thank you
A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 7kN/m2 . Express this efficiency as a percentage of a Carnot cycle efficiency of the same limits of temperature. B. If the steam leaves the boiler at 3500C with the same pressure of the boiler and condenser given above. Explain why the Rankine efficiency in (A) is less than in (B), and why the ratio of efficiencies of the respective Rankine and Carnot is grater. Ans [ 88.3%, 49.9%]
A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 7kN/m². Express this efficiency as a percentage of a Carnot cycle efficiency of the same limits of temperature. B. If the steam leaves the boiler at 350°C with the same pressure of the boiler and condenser given above. Explain why the Rankine efficiency in (A) is less than in (B), and why the ratio of efficiencies of the respective Rankine and Carnot is grater.
Problem 1: The boiler of a power steam cycle operates at 6000 kPa and the condenser at 50 kPa. At the entrance to the turbine, the temperature is 500°C. The isentropic efficiency of the turbine is 90 percent, pressure and pump losses are negligible, and the water leaving the condenser is subcooled by 6.3°C. The boiler is sized for a mass flow rate of 18 kg/s. You are asked to: a. Represent the cycle on P-v and T-s diagrams. b. Compute the rate at which heat is added in the boiler. c. Compute the power required to operate the pumps. d. Determine the net power produced by the cycle. e. Compute the thermal efficiency.
1. Discuss the effect of decreasing the condenser pressure, increasing the boiler pressure and increasing the maximum temperature in the basic Rankine cycle on the overall thermal efficiency, while showing the different variations in the T-S diagram (Hint: show how the Wnetwill be affected)
Water enters the turbine of an ideal Rankine cycle as superheated vapor at 10 MPa and 600°C. If the condenser pressure is 10 kPa, Calculate the thermal efficiency of the system.
A steam power plant operates between a boiler pressure of 52 bar and a condenser pressure of 0.045 bar. Calculate for these limits the cycle efficiency for a Rankine cycle with dry saturated steam at the entry to the turbine
An Actual Rankine cycle operates on a boiler and condenser pressure of 2MPa and 20kPa respectively. Steam leaves the boiler at 500°C. The cycle produces a Net Power of 10MW. a.) Determine the steam rate of the turbine. (kg/kW-hr) b.) Determine the steam rate of the turbine. (kg/kW-hr) c.) Determine the heat rate of the cycle (kJ/kW-hr) ROUND OFF ANSWER TO SIX SIGNIFICANT FIGURES
A 330 MW steam power plant operates according to the simple ideal Rankine cycle. Water vaporenters the turbine at 10 MPa pressure and 525 ° C temperature and 15 kPa condenser pressureIt is expanding. A T-s with cycle, saturated liquid and saturated steam curvesshow in the diagram and (a) the degree of dryness of the steam at the turbine outlet, (b) the thermal efficiency of the cycle,(c) calculate the mass flow of water vapor circulating in the cycle
Considering a Rankine cycle: Why is it important to condense at leastuntil liquid saturated the fluid in the condenser?