Externally Fired Evaporative Gas Turbine With a Condensing Heat Exchanger

The integration of externally fired gas turbines and evaporative gas turbines (e.g., the HAT cycle) can offer the features from both systems: using solid fuel without requiring particulate clean up to protect the gas turbine path, and having the potential to enhance the power output and increase the efficiency without including a bottoming steam turbine. Exhaust gases from externally fired evaporative gas turbines have a high moisture content. Using a condensing heat exchanger makes it possible to recover more exhaust heat, thereby providing more potential for improving the system performance. This paper presents a new system with integration of a condensing heat exchanger in an externally fired evaporative gas turbine. The first and second laws of thermodynamics have been used to analyze the system. This study extends the overall knowledge on the externally fired evaporative gas turbine system and provides an investigation of the system with a condensing heat exchanger.Copyright © 1996 by ASME