To improve the utilization of hot dry rock resources, a novel type of hot dry rock power generation system is proposed in this paper. In this system, the Kalina system is coupled with the organic Rankine cycle (ORC) system. Combined with the operating parameters of the geothermal power generation project in Husavik, Iceland, the cycle performance of the novel power generation system and the conventional Kalina system is compared and analyzed by the Engineering Equation Solver (EES) software. The results show that (1) under the same heat source conditions, the net power generation of the novel power generation system is higher than that of the conventional Kalina system, and as the proportion of preheating increases, the net power generation increases by 38%-46%. (2) When the cooling water temperature increases from 5°C to 30°C, the net power generation of the system is reduced by 1089 kW, and the power generation ratio of the ORC system is always maintained at approximately 30%. (3) There is an optimal ORC subsystem evaporation temperature of 56°C so that the net power generation of the entire system reaches a maximum of 3088 kW.
Keywords Hot Dry Rock, Kalina, ORC, Power generation system, Net power generation