What is the purpose of reheat cycle Mcq?
Explanation: Reheat cycle is worked with rankine cycle to remove the moisture from the steam.
What is Reheat Rankine Cycle?
Reheating is a method of improving Rankine cycle efficiency which consists of inter-stage heating of the expanding steam. After the first stage of expansion which typically reduces initial steam pressure by one-fourth, the steam is heated up (or close) to the maximum heat source temperature.
Why do we reheat steam?
Steam reheating, practised at one time mainly to do away with the high wetness of steam in the last stages of turbines, is now used to increase the thermal efficiency cycles.
What are the effects of reheating in steam turbine?
Explanation: Reheat increases work output.
What is the purpose of reheating?
The main purpose of reheating is to avoid excess moisture in steam at the end of expansion to protect the turbine. But it need not improve the cycle efficiency. That will depend (as Dmitri said) upon whether the mean temperature of reheat addition is > or < the mean temperature of heat addition before reheat.
What are the advantages of reheat cycle?
Advantages: The advantages of using a reheat cycle are higher thermal efficiency, reduced feed water pump power, smaller condenser, smaller boiler, long life of the turbine and less handling of the fuel and firing requirement.
How we can increase the efficiency of Rankine Cycle?
Increasing the Efficiency of Rankine Cycle That is, to increase the efficiency one should increase the average temperature at which heat is transferred to the working fluid in the boiler, and/or decrease the average temperature at which heat is rejected from the working fluid in the condenser.
What is the effect of reheat on specific output?
This reduces the work of compression and increases the specific output of the plant with a decrease in the thermal efficiency. The loss in efficiency due to intercooling can be remedied by employing exhaust heat exchange as in the reheat cycle. Here heat supply and output both increases as compared to simple cycle.
What are the processes involved in Rankine Cycle?
The Rankine cycle operates in the following steps: 1-2-3 Isobaric Heat Transfer. High pressure liquid enters the boiler from the feed pump (1) and is heated to the saturation temperature (2). Further addition of energy causes evaporation of the liquid until it is fully converted to saturated steam (3).
Which process does Rankine cycle contain?
Explanation: Working fluid in Rankine cycle undergoes 4 processes, expansion in turbine, heat addition in Boiler, heat rejection in Condenser and compression in pump.