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Q1: The steam rate to a turbine for variable output is controlled by a throttle valve in the inlet line. Steam is supplied to the throttle valve at 2000kPa and 250°C. The exhaust steam at 10 kPa has a quality (x2) of 0.90, the steam flow rate is 0.6 kg-s-1, and the power output of the turbine is 180 kW. (a) What are the heat losses from the turbine? (b) What would be the power output if the steam supplied to the throttle valve were expanded isentropically to the final pressure?

Q1: The steam rate to a turbine for variable output is controlled by a throttle valve in the inlet line. Steam is supplied to the throttle valve at 2000kPa and 250°C. The exhaust steam at 10 kPa has a quality (x2) of 0.90, the steam flow rate is 0.6 kg-s-1, and the power output of the turbine is 180 kW. (a) What are the heat losses from the turbine? (b) What would be the power output if the steam supplied to the throttle valve were expanded isentropically to the final pressure?

Elements Of Electromagnetics
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
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Q1: The steam rate to a turbine for variable output is controlled by a throttle valve in the inlet line. Steam is supplied to the throttle valve at 2000kPa and 250°C. The exhaust steam at 10 kPa has a quality (x2) of 0.90, the steam flow rate is 0.6 kg-s-1, and the power output of the turbine is 180 kW. (a) What are the heat losses from the turbine? (b) What would be the power output if the steam supplied to the throttle valve were expanded isentropically to the final pressure?
Transcribed Image Text:Q1: The steam rate to a turbine for variable output is controlled by a throttle valve in the inlet line. Steam is supplied to the throttle valve at 2000kPa and 250°C. The exhaust steam at 10 kPa has a quality (x2) of 0.90, the steam flow rate is 0.6 kg-s-1, and the power output of the turbine is 180 kW. (a) What are the heat losses from the turbine? (b) What would be the power output if the steam supplied to the throttle valve were expanded isentropically to the final pressure?
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