![]() ![]() Reheating, intercooling and regeneration combined.The diagram of regenerative gas turbine cycle and efficiency formula is given below. This results in decrease of exhaust gas temperature and increase in efficiency. In this method, exhaust gas is used to heat the working fluid at point 2. Hence, the ways that are proposed to increase efficiency include altering these values. Various methods used to increase the efficiency of gas turbines are. Altering these values can directly affect the efficiency. The factors that affect the efficiency directly are temperature, pressure ratio and specific ratio. There are number of ways by which the efficiency of a gas turbine can be increased. Turbine thermodynamics calculator how to#How to increase efficiency of gas turbine? Most common ways of improving efficiencies of gas turbines are regenerative cooling, intercooling, reheating. The efficiency of gas turbines can be increased by number of ways. The formula for efficiency is given as efficiency = work done/heat addedĪs work done by compressor increases, the net work done decreases so the overall efficiency decreases. As gases have lower density, they need extra work to be compressed hence increasing compressor work. Gas turbines work on constant volume cycles. A good working fluid should have specific heat ratio value closer to isentropic value that is 1.4. Specific heat ratio for ideal gases is around 1.4, real gases have values around 1.2-1.3. The pressure ratio P2/P1 is an important characteristic that affects the efficiency of gas turbine. Adding to which, decreasing sink temperature also increases the efficiency of gas turbines but it can be decreased upto ambient conditions only so it does not create much effect on efficiency. Increasing the inlet temperature of the turbine increases its efficiency. Gas turbine efficiency depends mainly on three factors. Image: Open cycle gas turbine Practice questions What affects gas turbine efficiency? Calculate efficiency using the relation–.Calculate actual work done by turbine using the actual values of enthalpy after mechanical losses.Calculate actual work done by turbine using the formula. ![]()
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