Problem (8.1) The steam at 100 bar and 500°C is supplied to a steam turbine of 30 MW capacity. The vacuum maintained in the condenser is 71 cm of Hg when the barometer reads 76 cm of Hg. The steam coming out of the turbine is condensed in a surface condenser using river water for cooling. The rise in temperature of the cooling water is limited to 10°C. The temperature of the water at the inlet of the condenser is 20°C. The condensate comes out of condenser as saturated liquid. Find (a) the mass of steam supplied to the turbine per hour, (b) Capacity of the pump to circulate water, (c) the heat transfer area of the condenser if the overall heat transfer coefficient is 400 W/m²°C.

Problem (8.1) The steam at 100 bar and 500°C is supplied to a steam turbine of 30 MW capacity. The vacuum maintained in the condenser is 71 cm of Hg when the barometer reads 76 cm of Hg. The steam coming out of the turbine is condensed in a surface condenser using river water for cooling. The rise in temperature of the cooling water is limited to 10°C. The temperature of the water at the inlet of the condenser is 20°C. The condensate comes out of condenser as saturated liquid. Find (a) the mass of steam supplied to the turbine per hour, (b) Capacity of the pump to circulate water, (c) the heat transfer area of the condenser if the overall heat transfer coefficient is 400 W/m²°C.

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

Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems

Section: Chapter Questions

Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....

See similar textbooks

Similar questions

Condensers in these refrigerators are all_______cooled.
The subcooling temperature in a condenser can be measured by taking the difference between the A. suction pressure converted to temperature and the boiling refrigerant. B. boiling temperature and the condensing temperature. C. condensing temperature and the leaving-refrigerant temperature. D). condensing temperature and the entering-refrigerant temperature.
Steam is delivered to turbine at 5.4 MPa and 600 degree C. Before condensation at 31 degree C, steam is extracted for feed water heating at 0.6 MPa. The turbine exhaust is 60 degree C. the required values of some state point properties are tabulated below. 7. Determine the quality of steam at the condenser inlet.
At throttling calorimeter receives steam from a boiler drum at0.11MPa and is superheated by 10 degrees. If the boiler drum pressure is 1.55 MPa, what is the quality of the steam generated by the boiler? with solution
The condensing pressure for a Rankine engine is 1 bar (hf= 417.4 kJ/kg). Calculate the net work for 1 kg/s of steam and the thermal efficiency when the steam at the beginning of expansion is at 50 bar and (a) saturated (b) 350°C and (c) 640°C. Note the variation of efficiency and the quality at the end of the expansion.
A reheater cycle with two stages of reheating is executed with steam expandinginitially from 20.544 Mpa and 540oC. The pressures of two reheaters are 3.2544 Mpaand 0.85544 Mpa, and the steam leaves each reheater at 540 oC. Condensation occursat 70 oC. Calculate W, ec and ee.
An ammonia system with a 158-kW evaporator operating at -1°C and a 35-kW evaporator operatingat -40°C uses flash gas removal and intercooling. The condensing temperature is 32°C. Thearrangement is as shown. How many kilograms per minute of ammonia are compressed by the high-pressure compressor?
The condensing pressure for a Rankine engine is 1 bar. Calculate the net work for 1.5 kg of steam and the thermal efficiency when the steam at the beginning of expansion is at 50 bar and (a) saturated, (b) 360°C, and (c) 650°C.
Steam is delivered to turbine at 5.4 MPa and 600 degree C. Before condensation at 31 degree C, steam is extracted for feed water heating at 0.6 MPa. The turbine exhaust is 60 degree C. the required values of some state point properties are tabulated below. 6. Determine the enthalpy of bled steam entering the open feed water heater.
A reheater cycle is executed of 1 kg steam expanding initially from 12.547 Mpa and540.547 oC. The reheater pressures are 2.5547 Mpa and the steam leaves the reheaterat 420.547 oC. Condensation occurs at 0.02547 Mpa. Calculate W, ec and ee.
A reheater cycle with two stages of reheating is executed with steam expanding initially from 20.111 Mpa and 540oC. The pressures of two heaters are 3.2111 Mpa and 0.85111 Mp, and the steam leaves each reheater at 540oC. Condensation occurs at 70oC. Calculate W, ec and ee.
At throttling calorimeter receives steam from a boiler drum at0.11MPa and is superheated by 10 degrees. If the boiler drum pressure is 1.55 MPa, what is the quality of the steam generated by the boiler?