A CRYOGENIC GAS-TURBINE ENGINE USING HYDROGEN FOR WASTE HEAT-RECOVERY AND REGASIFICATION OF LNG

Hydrogen has certain characteristics which make it convenient to use as a working substance in a closed gas turbine cycle, which recovers waste heat and delivers power, and rejects the heat for evaporation of LNG to be ready for further use. Important operating parameters are compressor, pressure ratio r(c) and turbine inlet temperature T3. A computer program is designed to carry out parametric performance calculations on, namely, power output, reject heat and overall efficiency. Sensitivity analysis shows that T3 is relatively more effective than r(c) with respect to power and overall efficiency, whereas r(c) takes over when rejected heat for evaporation is considered of main concern. Economic analysis shows that this system would be a remarkably viable alternative to the currently used heating system, in such an energy intense industry.