- #1
bobboxx
- 7
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I have a question on the rankine cycle with a closed feedwater heater. My thermo book says that in an ideal closed feedwater heater, the feedwater is heated to the exit temperature of the extracted steam. I don't really understand this. I know the bleed steam from the turbine is cooled to a saturated liquid after it heats the feedwater but I don't what limits the two exit temperatures to be equal.
Also I have a general questions about regeneration. I was looking at a regenerator in which exhaust gas from a turbine is used to preheat the gas before it enters the combustion chamber. How is it possible for the exhaust gas leaving the regenerator(cooled) be at a lower temperature than the gas right before the combustion chamber(heated). I would think that if the exhaust gas were at a lower temperature the heat transfer would be reversed.
Thanks for any help
Also I have a general questions about regeneration. I was looking at a regenerator in which exhaust gas from a turbine is used to preheat the gas before it enters the combustion chamber. How is it possible for the exhaust gas leaving the regenerator(cooled) be at a lower temperature than the gas right before the combustion chamber(heated). I would think that if the exhaust gas were at a lower temperature the heat transfer would be reversed.
Thanks for any help