Recovery of Solid Oxide Fuel CellWaste Heat by Thermoelectric Generators and AlkaliMetal Thermoelectric Converters

A Solid Oxide Fuel Cell(SOFC)is an electrochemical device that converts the chemical energy of a substance into electrical energy through an oxidation-reduction mechanism.The electrochemical reaction of a solid oxide fuel cell(SOFC)generates heat,and this heat can be recovered and put to use in a waste heat recovery system.In addition to preheating the fuel and oxidant,producing steam for industrial use,and heating and cooling enclosed rooms,this waste heat can be used for many more productive uses.The large waste heat produced by SOFCs is a worry that must be managed if they are to be adopted as a viable option in the power generation business.In light of these findings,a novel approach to SOFC waste heat recovery is proposed.The SOFC is combined with a“Thermoelectric Generator and an Alkali Metal Thermoelectric Converter(TG-AMTC)”to transform the excess heat generated by both the SOFC and the TG-AMTC.The proposed TG-AMTC is evaluated using a number of performance indicators including power density,operating temperature,heat recovery rate,exergetic efficiency,energy efficiency,and recovery time.The experimental results state that TG-AMTC has provided an exergetic efficiency,energetic efficiency,and recovery time of 97%,98%,and 23%,respectively.The study proves that the proposed TG-AMTC for SOFC is an efficient method of recovering waste heat.

萤石资源开发利用现状与战略意义

萤石作为一种重要的非再生非金属战略矿产资源,受到各国重视。随着科学技术和国民经济的快速发展,其经济价值和战略地位日益突出,广泛应用于冶金、建材、氟化工等传统领域和新能源、新材料、新医药等战略性新兴产业。近年来,氟化工产业链不断深化,对萤石资源的需求急剧增加,由于全球萤石资源储量有限、资源分布不均、贸易保护主义以及逆全球化势力等因素,全球氟化工产业呈现出高度集中和高度垄断的现象,不同国家和地区的经济发展和萤石资源清洁高效利用、精深加工技术水平存在较大偏差,对萤石产品的供需和消费格局产生严重影响,激化萤石资源储备与萤石产业发展之间的矛盾。本工作从资源储备、主要产业结构、供需消费结构及清洁高效利用技术等方面详细阐述了萤石资源的经济地位和战略意义,提出萤石资源的全球战略布局,通过强化萤石资源整合重组、清洁高效利用、精深加工技术与装备研发、高端产品制造,进一步推动萤石产业朝着精细化、复合化、轻量化、环保节能、循环经济氟化工产品应用领域以及高新技术产业的应用研究开发方向发展,保障萤石资源储备与供给,实现全球萤石资源优化配置和萤石产业的健康可持续发展。