This work presents a novel integrated system for the multigeneration of power, space heating, freshwater, and ammonium bicarbonate as a useful chemical commodity with a geothermal-based carbon capturing system. A thermodynamic model based on energy and exergy analyses is developed for this integrated system. The results from the model show that the new carbon capturing unit that is based on an electrochemical ammonia synthesizer requires 13.3% less energy to capture the carbon dioxide released from the solid-oxide fuel cell subsystem than using a combination of proton-exchange membrane electrolyzer and a Haber-Bosch process. Also, the present integrated system produces ammonium bicarbonate sufficiently at a rate of 0.634 kg s⁻¹, when the fuel cell produces 2010 kW of electric power. In addition, the energy and exergy efficiencies of the solid-oxide fuel cell subsystem are found to be 44.5%, and 50.5%, respectively. Then, parametric studies are conducted to see how this integrated system behaves under varying conditions. It is found that the geothermal fluid and the faradaic efficiency of the electrochemical ammonia synthesizer have major effects on the performance of the geothermal-based carbon capturing system and they can lower the energy requirements of the carbon capturing to as low as 8.28 MJ kg⁻¹ of carbon dioxide.

这项工作提出了一种用于多代发电、空间供暖、淡水和碳酸氢铵的新型集成系统，作为一种有用的化学商品，具有基于地热的碳捕获系统。为该集成系统开发了基于能量和火用分析的热力学模型。该模型的结果表明，基于电化学氨合成器的新型碳捕获装置捕获固体氧化物燃料电池子系统释放的二氧化碳所需的能量比使用质子交换膜电解器和哈伯-博世过程。此外，本集成系统以 0.634 kg s ^-1的速率充分生产碳酸氢铵，当燃料电池产生 2010 千瓦的电力时。此外，固体氧化物燃料电池子系统的能量和火用效率分别为 44.5% 和 50.5%。然后，进行参数研究以了解该集成系统在不同条件下的表现。发现地热流体和电化学氨合成器的法拉第效率对地热碳捕获系统的性能有重大影响，它们可以将碳捕获的能量需求降低至低至 8.28 MJ kg ^-1的二氧化碳。