Gas turbines are becoming increasingly popular in industrial production. Although gas turbines have decreased carbon emissions over the past 20-years, energy continues to be emitted externally and internally as exhaust. In fact, gas turbines generate 80% of all CO2 emissions from offshore activities.
Gas Turbine Waste Heat Recovery Using Plate Exchanger Power Generation
One manner of utilizing the waste heat emitted from gas turbine exhaust is to convert it to a usable form of energy, such as electricity.Thermoelectric technology presents an alternative solution to companies, dependent on gas turbines, to do just that. This is accomplished by systems that redirect the waste heat to flow across thermoelectric modules. In such systems, the waste heat is cleanly converted into electricity, thus increasing overall efficiency.
The EverGen® Plate Exchanger, recently introduced by II-VI Marlow for heat-to-electrical power conversion from hot and cold fluid loops, can be a building block for creating such a system. . This product combines thermoelectric power generation with the high heat transfer rates, scalability and compactness of traditional plate exchanger technology. The result is an extremely scalable power generation system. Gross volumetric power density can approach 1kW/ft3 for large systems, depending on the temperature differential available. The EverGen® TEG Plate Exchangers can be fabricated in both gasketed and brazed configurations.
The following figure shows how the EverGen® TEG Plate Exchanger can be utilized to recover waste heat in coastal applications utilizing gas turbines. First, a gas-to-liquid exchanger (such as GEA GP series gas-liquid exchangers) is used to capture waste heat from the gas turbine exhaust into a hot loop. Through this loop, heat flows into the EverGen® TEG Plate Exchanger, across the thermoelectric modules, and into a cold side seawater loop. The net result is the direct production of useful electrical energy.
If you are interested in learning more about II-VI Marlow’s most recent thermoelectric innovations, please contact one of our team members today.
For more information download our free whitepaper Energy Harvesting for Wireless Sensors.