Gas turbines produce hot exhaust gases that can contain usable thermal energy. An AURA Waste Heat Recovery Unit (WHRU) transfers heat from the turbine exhaust to a suitable medium for use in an industrial process.
AURA designs each turbine exhaust heat recovery system according to the project’s exhaust gas temperature, volume flow, pressure conditions and process requirements. Depending on the application, heat can be transferred to thermal oil, steam or water.
The AURA waste heat recovery system for turbines can make the heat contained in turbine exhaust gases usable in a temperature range of up to 430 °C for other processes. Flue gases with lower temperatures can also be utilized by installing an additional afterburner. The system can generate an output of up to 15.000 kW.
Hot turbine exhaust gas is directed through a specially designed heat recovery system. A heat exchanger transfers its energy to the selected secondary medium. The heated medium is then supplied to the industrial process, while the exhaust gas temperature is reduced in a controlled way.
System design takes account of:
A WHRU may be suitable where a turbine operates continuously and provides a stable exhaust gas temperature and sufficient volume flow. Its practical value also depends on whether the process can use the recovered heat.
Depending on process requirements and system design, the recovered heat can be transferred to thermal oil, water or steam.
Integration may be possible. The exhaust gas conditions, process requirements and technical interfaces should be assessed for each project.
The reduction depends on how much additional heat generation is replaced and on the energy source used by the existing system. Avoid a fixed or “significant” reduction claim unless it is supported by project-specific data.
That depends on the heat consumers and their operating temperatures. The usable share must be assessed for each process.
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