Water is the working fluid in a Rankine cycle. Steam exits the steam generator at 1500 lbf/in.² and 1100°F. Due to heat transfer and frictional effects in the line connecting the steam generator and turbine, the pressure and temperature at the turbine inlet are reduced to 1400 lbf/in.² and 1000°F, respectively. Both the turbine and pump have isentropic efficiencies of 85%. Pressure at the condenser inlet is 2 lbf/in.², but due to frictional effects the condensate exits the condenser at a pressure of 1.5 lbf/in.² and a temperature of 110°F. The condensate is pumped to 1600 lbf/in.² before entering the steam generator. The net power output of the cycle is 1x 10⁹ Btu/h. Cooling water experiences a temperature increase from 60°F to 76°F, with negligible pressure drop, as it passes through the condenser. Determine for the cycle: (a) the mass flow rate of steam, in lb/h. (b) the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. (c) the percent thermal efficiency. (d) the mass flow rate of cooling water, in lb/h.

Water is the working fluid in a Rankine cycle. Steam exits the steam generator at 1500 lbf/in.² and 1100°F. Due to heat transfer and frictional effects in the line connecting the steam generator and turbine, the pressure and temperature at the turbine inlet are reduced to 1400 lbf/in.² and 1000°F, respectively. Both the turbine and pump have isentropic efficiencies of 85%. Pressure at the condenser inlet is 2 lbf/in.², but due to frictional effects the condensate exits the condenser at a pressure of 1.5 lbf/in.² and a temperature of 110°F. The condensate is pumped to 1600 lbf/in.² before entering the steam generator. The net power output of the cycle is 1x 10⁹ Btu/h. Cooling water experiences a temperature increase from 60°F to 76°F, with negligible pressure drop, as it passes through the condenser. Determine for the cycle: (a) the mass flow rate of steam, in lb/h. (b) the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. (c) the percent thermal efficiency. (d) the mass flow rate of cooling water, in lb/h.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lb/in.², 700°F, and a condenser pressure of 180 lb/in.² The isentropic turbine efficiency is 90%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lb/in.2 and exiting as saturated vapor at 140 lb/in.2 The mass flow rate of the process stream is 48,000 lb/h. Let To -70°F, po - 14.7 lb//in.² Step 1 Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h. mcycle Step 2 Hint W Your answer is correct. cycle = 54852.5 Determine the net power output for the cycle, in Btu/h. Hint Step 3 Your answer is correct. 7087421.984 € = i lb/h eTextbook and Media Save for Later Btu/h Evaluate an exergetic efficiency for the overall cogeneration system. The exergetic efficiency is defined as the net rate of exergy output divided by the net rate of exergy input. Attempts: 1 of 4 used % Attempts: 2 of 4 used Attempts: 0 of 4…
A steam Rankine cycle operates with a condenser temperature of 30°C, and a boiler pressure of 15MPa. The turbine is divided into two stages, a high-pressure turbine, and a low pressure turbine. In between the turbine stages the steam is reheated by the boiler so that the inlet temperature to both turbine stages is the same. The exit pressure of the first turbine stage is 7MPa. The condenser inlet is a saturated vapor and the outlet a saturated liquid. What is the net work of the cycle? What is the thermal efficiency of the cycle?
Water is the working fluid in a Rankine cycle. Steam exits the steam generator at 1500 lbf/in.2 and 1100°F. Due to heat transfer and frictional effects in the line connecting the steam generator and turbine, the pressure and temperature at the turbine inlet are reduced to 1400 lbf/in.² and 1000°F, respectively. Both the turbine and pump have isentropic efficiencies of 95%. Pressure at the condenser inlet is 2 lbf/ in.2, but due to frictional effects the condensate exits the condenser at a pressure of 1.5 lbf/in.² and a temperature of 110°F. The condensate is pumped to 1600 lbf/in.² before entering the steam generator. The net power output of the cycle is 5.5 x 108 Btu/h. Cooling water experiences a temperature increase from 60°F to 76°F, with negligible pressure drop, as it passes through the condenser. Determine for the cycle: (a) the mass flow rate of steam, in lb/h. (b) the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. (c) the percent…
Please solve the following
Water is the working fluid in an Ideal Rankine cycle. Steam enters the turbine at 1400 lbpin² and 1000°F. The condenser pressure is 2 Iben. The net power output of the cycle is 250 MW. Cooling water experiences a temperature Increase from 60°F to 765, with negligible pressure drop, as it passes through the condenser. Step 1 Determine the mass flow rate of steam, In lb/h, Step 2 Hint Your answer is correct On Determine the rate of heat transfer, in Stuh, to the working fuld passing through the steam generator. 2144195010 Btu/h Step 3 Hint 1536198.045 Your answer is correct. Step 4 Your answer is correct. Determine the thermal efficiency of the cycle. Hint 39.78 % Determine the mass flow rate of cooling water, in lb/h 1b/h Attempts: 3 of 4 used Attempts: 1 of 4 used Attempts: 1 of 4 used
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 8 MPa, 5608C with a mass flow rate of 7.8 kg/s and exits at 8 kPa. Saturated liquid enters the pump at 8 kPa. The isentropic turbine efficiency is 88%, and the isentropic pump efficiency is 82%. Cooling water enters the condenser at 188C and exits at 368C with no significant change in pressure. Determine: (a) the net power developed, in kW. (b) the thermal efficiency. (c) the mass flow rate of cooling water, in kg/s
Water is the working fluid in an ideal Rankine cycle. Steam enters the turbine at 1400 lb/in² and 1400°F. The condenser pressure is 2 lb-/in.² The net power output of the cycle is 250 MW. Cooling water experiences a temperature increase from 60°F to 76°F, with negligible pressure drop, as it passes through the condenser. Step 1 * Your answer is incorrect. Determine the mass flow rate of steam, in lb/h. m = I lint i 1347451.2 lb/h
Water is the working fluid in an ideal Rankine cycle. Steam enters the turbine at 1400 lbf/in.? and 1000 °F. The condenser pressure is 2 lbf/in.2 The net power output of the cycle is 1 x 10° Btu/h. Cooling water experiences a temperature increase from 60 °F to 76 °F, with negligible pressure drop, as it passes through the condenser. Determine the energy input to the working fluid is provided by heat transfer from hot gaseous products of combustion, which cool as a separate stream from 1490 to 380 °F with a negligible pressure drop. The gas stream can be modeled as air as an ideal gas. Determine, in Btu/h, the rate of exergy destruction in the (a) heat exchanger unit of the steam generator. (b) turbine and pump. (c) condenser. Also calculate the net rate at which exergy is carried away by the cooling water passing through the condenser, in Btu/h. Let To = 60 °F. po = 14.7 Ibf/in.2
Consider an ideal Rankine cycle. Water exits the condenser at a pressure of 0.08 bar and a flow rate of 30 kg/s. Saturated steam exits the boiler at a pressure of 150 bar. Determine: (a) the net power developed by the power plant, in kW. (b) the rate of heat transfer in the boiler, in kW. (c) the thermal efficiency of the cycle.