Ecotechnical Analysis of Gas Turbines Heat Recycling Using Organic Rankine Cycle (ORC) in Gas Pressure Amplification Facilities

Since the output temperature of the turbine in gas amplification stations is very high, there is the potential of using the joint production of heat and electricity. Organic Rankine Cycle (ORC), for recovering the waste heat of gas turbines, is being used around the world as a reliable and economical technology. This cycle has technical, economic and performance advantages comparing to the classic Rankine cycle. ORC cycle simulation using ASPEN HYSYS software was such that the simplest ORC cycle works with a single fluid and has the least efficiency among more advanced and common processes, is chosen to apply the choices and the work conditions of the sample station in. Since the executer companies of ORC cycle don’t use the simple cycle because of its low efficiency, we have used the simple process only to start simulating the more complicated cycles. If we assume pentane fluid to be the fluid of the simple cycle, we can get the pure output power, efficiency and capital return per different environment temperatures, turbo compressor’s other output discharges and also its different temperature, in various temperatures and different discharges. If the number of facilities which are equipped with the heat recovery system increases, the cost of each megawatt of produced power will significantly decrease and capital return decreases to two years or even less. Using the ORC cycle to return the capital under seven years is also justifiable economically.

Keywords:

ORC , Heat recovery , Gas turbine , Gas pressure