耦合光热储能的小麦秸秆超临界水气化制氢系统的热力学研究  

THERMODYNAMIC STUDY OF HYDROGEN PRODUCTION SYSTEM BY SUPERCRITICAL WATER GASIFICATION OF WHEAT STRAW COUPLED WITH PHOTOTHERMAL ENERGY STROAGE

作　　者：薛强坤 许宏鹏 贾明[1] 孙煜皓 吴少华 Xue Qiangkun;Xu Hongpeng;Jia Ming;Sun Yuhao;Wu Shaohua(College of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,China;College of Vehicle and Energy,Yanshan University,Qinhuangdao 066004,China;SZ-HK International AT Research Institute,Shenzhen 518102,China)

机构地区：[1]大连理工大学能源与动力学院,大连116024 [2]燕山大学车辆与能源学院,秦皇岛066004 [3]前海深港国际先进技术研究院,深圳518102

出　　处：《太阳能学报》2024年第9期170-178,共9页Acta Energiae Solaris Sinica

基　　金：中央高校基本科研业务费资助(DUT21RC(3)043);河北省自然科学基金(E2021203041)。

摘　　要：提出一种基于太阳能驱动的小麦秸秆超临界水气化系统模型,并结合熔融盐储能系统,有效克服了太阳能的间歇性问题,为生物质制氢的碳中和路径提供了新思路。热力学分析发现热解温度和能量输入是该系统制氢产率的主要影响因素,在较高热解温度(700℃)和低能量输入(215.14 kW)的条件下氢气产率达到最大;通过耦合熔融盐储能,该系统实现了全天不间断高效运行,其能量效率和[火用]效率分别达到36.3%和36%以上。In this paper,a system model of solar driven supercritical water gasification of wheat straw coupled with molten salt energy storage system is presented,which effectively overcomes the intermittency problem of solar energy,thus providing a new carbon neutral path for hydrogen production via biomass gasification.Thermodynamic analysis suggest that pyrolysis temperature and energy input are the main factors affecting the hydrogen yield of the system.The hydrogen yield reached the maximum under the conditions of high pyrolysis temperature(700℃)and low energy input(215.14 kW).Owing to molten salt energy storage,the system could operate continuously throughout the whole day efficiently,with the energy efficiency and exergy efficiency reaching 36.3%and 36%,respectively.

关 键 词：生物质 气化 太阳能 超临界水 光热储能 

分 类 号：TK519[动力工程及工程热物理—热能工程]