千瓦级船舶排烟余热温差发电系统生命周期CO_(2)排放评估

Life Cycle CO_(2) Emission Analysis of a Kilowatt-level Thermoelectric Generator for Exhaust Heat Recovery from Ship Engine

为研究船舶排烟余热温差发电系统全生命周期碳排放足迹,分析了不同输出功率、不同电力来源条件下船舶温差发电系统的生命周期碳减排效果。结果表明,单台船舶温差发电系统全生命周期内可以实现碳减排104.45 tCO_(2)e;提升温差发电系统输出功率可以有效的提升其碳减排总量,当单片温差发电片输出功率为14.5 W时,单台设备可实现年减排47.44 tCO_(2)e;温差发电系统抵消电力来源对其全生命周期碳减排效果也有非常重要的影响。可为探索清洁高效的船舶烟气余热回收利用技术提供理论基础和运行经验。

To investigate the carbon dioxide emission footprint of a kilowatt-level thermoelectric generator for exhaust heat recovery from ship engine,a life cycle assessment was conducted to compare the effect of output power per thermoelectric module and different power source conditions on the carbon emission reduction efficiencies.The results show that the use of the pilot-scale thermoelectric generator reduces 104.45 tons of CO_(2)equivalent(tCO_(2)e)throughout its 20 years life cycle.Increasing the output power of the thermoelectric generator can effectively increase its total carbon emission reduction amount.When the output power of a single thermoelectric module reaches 14.5 W,an annual CO_(2)reduction of 47.44 tCO_(2)e can be achieved by the generator.Besides,the offsetting power source conditions also has a significant impact on its life cycle carbon footprints.The results obtained can be used to provide theoretical basis and operational experience for exploring cleaner and more efficient waste heat recovery technologies.