Volume 59

Industrial Steam Waste Heat-Driven Polygeneration System Integrating GTCC and Methanol Reforming for Hydrogen, Cooling, Heat and Power Shaoke Yuan, Fan Jiao, Dongjiang Han, Lejun Feng, Qibin Liu

Abstract

Traditional gas-fired combined heat and power (CHP) plants are plagued by high transmission loss to off-site heat users and irreversible loss when driving absorption chillers (heat source ≤200℃). To alleviate these challenges, this study proposes a novel hydrogen-cooling-heating-power poly-generation energy system driven by industrial steam waste heat. This innovative system utilizes methanol as feedstock, whose reforming temperature (200-300°C) aligns closely with industrial steam temperatures. It is integrated with gas-steam combined cycle power generation and the thermochemical process of methanol reforming. The waste heat from 300°C industrial steam is utilized to drive hydrogen production through methanol reforming, achieving cascade energy utilization. The industrial steam is split for material and energy coupling with the methanol reforming unit. One stream is mixed with methanol as a reactant and enters the reformer, while the other provides the heat for the endothermic reforming reaction. The industrial steam waste heat is further recovered through absorption refrigeration for cascaded utilization. The overall utilization efficiency of industrial steam is enhanced. Under the designed operating conditions, the energy efficiency and exergy efficiency of the system reach 73.60% and 61.37%, respectively. Electricity, hydrogen, cooling, and heat are simultaneously generated by the integrated design, minimizing energy waste and alleviating thermal mismatch. This study provides an innovative solution for the efficient utilization of industrial steam in power plants.

Keywords GTCC, industrial steam, MSR, absorption refrigeration, integrated systems