Wet cycle microturbines

MSc student: Jelmer Vellema (SPET/3mE)

Microturbines can be bought from various manufacturers nowadays as a part of combined heat and power (CHP) systems. Although the overall (electrical & heat) efficiency of these systems is quite high, the electrical efficiency is still a lot lower than what can be achieved with today’s piston engines.

A possible way to increase the electrical efficiency could be to use a part of the waste heat from the microturbine to generate steam. This steam is subsequently injected back into the microturbine’s combustion chamber. The accompanying rise in mass flow and specific heat of the flue gas entering the turbine leads to a rise in power output and efficiency. A microturbine operating under these conditions is said to be in ‘wet cycle operation’.

The goal of the present project is to investigate the effects of wet cycle operation on the performance of a 100 kWe microturbine-based combined heat and power system. 



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