Thermodynamic analysis of a novel hybrid solar-LNG cold energy recovery system. (April 2019) - Ji, W
Abstract: Due to the low temperature of LNG (liquefied natural gas), there is abundant cold energy can be utilized during the regasification process. Therefore a novel hybrid solar-LNG cold energy recovery system was proposed. In this system, LNG cold energy is used as a heat sink for a propane Rankine power cycle and a cascaded ethylene glycol refrigeration cycle. Then through a direct expanding combined with the preheating of solar thermal energy, more power is generated by the regasified LNG. A thermodynamic analysis was carried out to investigate the best system design. Meanwhile, the influences of some key operating parameters on net output power and exergy efficiency were investigated. The results show that higher inlet temperature and pressure of NTB (natural gas turbine) are beneficial to system performance.