During high temperature thermo-chemical conversion utilization of solar,problems like local high temperature and poor heat transfer between two cavities occurred in the conventional directly and indirectly irradiated solar high temperature reactors.Thus,a new solar high-temperature phase transition reactor was developed by using high temperature heat plate-heat pipe technology.Its key part is high temperature shaped heat pipe (HTSHP).To investigate the heat bearing capacity of the HTSHP,the temperature field, stress field and thermal deformation of the HTSHP was numerically simulated,by establishing the thermal resistance model of the HTSHP and using thermal-stress coupling function of the large finite element anal-ysis software ANSYS.The analysis shows that,the maximum temperature of the HTSHP is 768 ℃,the maximum temperature difference is 1 8 ℃ and the temperature uniformity and heat transfer capability is ex-cellent.The thermal stress concentration occurs on the transitionally connecting heat plate.The maximum stress is 24.6 MPa,meeting the assessment requirements of the Steel Pressure Vessels- Analysis and De-sign Standard (JB/T4732—2005).%在太阳能高温热化学转化利用中,传统的直接照射式太阳能高温反应器和间接照射式两腔太阳能高温反应器均存在局部高温热点、两腔间传热能力差等问题.为此,应用高温热板-热管技术研制了新型太阳能高温相变反应器,其核心部件为高温异型热管(HTSHP).为分析HTSHP的热承载能力,构建了传热热阻模型,采用有限元分析软件 ANSYS 的热-应力耦合功能,对 HTSHP 在稳态条件下的温度场、应力场、热变形进行了数值模拟.结果表明, HTSHP最高温度为768℃,最大温差为18℃,均温性和传热能力较好；热应力集中于过渡连接的热板内壁上,最大应力为24．6 MPa,满足钢制压力容器分析设计标准的要求.
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