Abstract
A novel cooling and power cycle is proposed that combines a semi-closed cycle gas turbine called the High Pressure Regenerative Turbine Engine (HPRTE) with a Vapor Absorption Refrigeration System (VARS). In a previous study, the combined cycle was modeled using zero-dimensional steady-state thermodynamics, with the actual values of efficiencies and pressure drops for the turbomachinery and heat exchangers. The model predicts that the combined cycle with steam blade cooling and having a medium-sized engine will have a thermal efficiency of 49 % for a turbine inlet temperature of 1400 o C. This thermal efficiency is in addition to the large cooling effect generated in the evaporator of VARS which is 13 % of the net work output. In addition it also produces about 1.4 kg of water for each kg of fuel consumed. To validate models and to demonstrate the combined cycle, experiments were conducted on a modified HPRTE using as input the measured performance values of turbomachinery efficiencies and pressure drops. The values of temperatures, pressure, mass flow rates at different state points and other overall cycle parameters obtained from the computer model are compared with the experimental values. The difference between the values is found to be within acceptable limits. The model will be used in the future for the next developmental step of the combined HPRTE/VARS cycle.
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