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7.33. Superheated steam at 40 bar absolute and 500°C flows at a rate of 250 kg/min to an adiabatic turbine, where it expands to 5 bar. The turbine develops 1500 kW. From the turbine the steam flows to a heater, where it is reheated isobarically to its initial temperature. Neglect kinetic energy changes. a. Write an energy balance on the turbine and use it to determine the outlet stream temperature. b. Write an energy balance on the heater and use it to determine the required input (kW) to the steam. c. Verify that an overall energy balance on the two-unit process is satisfied. d. Suppose the turbine inlet and outlet pipes both have diameters of 0.5 meter. Show that it is reasonable to neglect the change in kinetic energy for this unit.

7.33. Superheated steam at 40 bar absolute and 500°C flows at a rate of 250 kg/min to an adiabatic turbine, where it expands to 5 bar. The turbine develops 1500 kW. From the turbine the steam flows to a heater, where it is reheated isobarically to its initial temperature. Neglect kinetic energy changes. a. Write an energy balance on the turbine and use it to determine the outlet stream temperature. b. Write an energy balance on the heater and use it to determine the required input (kW) to the steam. c. Verify that an overall energy balance on the two-unit process is satisfied. d. Suppose the turbine inlet and outlet pipes both have diameters of 0.5 meter. Show that it is reasonable to neglect the change in kinetic energy for this unit.

Refrigeration and Air Conditioning Technology (MindTap Course List)
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
Chapter40: Typical Operating Conditions
Section: Chapter Questions
Problem 10RQ: The seasonal energy efficiency ratio (SEER) includes the energy used in the _____and _____cycles.
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I need help with parts A - C
7.33. Superheated steam at 40 bar absolute and 500°C flows at a rate of 250 kg/min to an adiabatic turbine, where it expands to 5 bar. The turbine develops 1500 kW. From the turbine the steam flows to a heater, where it is reheated isobarically to its initial temperature. Neglect kinetic energy changes. a. Write an energy balance on the turbine and use it to determine the outlet stream temperature. b. Write an energy balance on the heater and use it to determine the required input (kW) to the steam. c. Verify that an overall energy balance on the two-unit process is satisfied. d. Suppose the turbine inlet and outlet pipes both have diameters of o.5 meter. Show that it is reasonable to neglect the change in kinetic energy for this unit.
Transcribed Image Text:7.33. Superheated steam at 40 bar absolute and 500°C flows at a rate of 250 kg/min to an adiabatic turbine, where it expands to 5 bar. The turbine develops 1500 kW. From the turbine the steam flows to a heater, where it is reheated isobarically to its initial temperature. Neglect kinetic energy changes. a. Write an energy balance on the turbine and use it to determine the outlet stream temperature. b. Write an energy balance on the heater and use it to determine the required input (kW) to the steam. c. Verify that an overall energy balance on the two-unit process is satisfied. d. Suppose the turbine inlet and outlet pipes both have diameters of o.5 meter. Show that it is reasonable to neglect the change in kinetic energy for this unit.
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