Natural Gas Combined Cycle
Combined cycle gas plants are a type of natural gas power plant used to generate electricity, consisting of a simple cycle gas plant in combination with a second steam engine that uses the Rankine cycle. The hot exhaust gasses from the initial gas turbine are sent to the steam engine, and the heat from them is used to generate steam. This steam can then expand through another turbine, generating even more electricity and increasing the plant’s overall efficiency. The efficiency of these plants can be as great as 55%, but the dispatch times tend to be slower than simple cycle natural gas plants.