中文摘要：

高温相变蓄热器是空间太阳能热动力发电系统的关键部件之一,相变材料（PCM）蓄热是其中的关键技术。对以LiF-CaF2为PCM和以干空气为工质的蓄热系统进行了地面实验,并分别建立了相应条件下填充纯PCM和泡沫复合相变材料（FCPCM）的蓄热单元管数学模型。经过数值计算得到结果表明,纯PCM蓄热单元管计算值与实验数据吻合得很好,表明了计算模型的有效性;此外,对填充纯PCM和FCPCM的蓄热单元管的计算结果进行了比较,结果表明,泡沫的填充强化了PCM的导热性能,提高了蓄热系统的热性能。

英文摘要：

A High Temperature Phase-change Heat Accumulator constitutes a key component in a space solar energy thermal power generation system,of which the heat accumulation in the phase-change material（PCM） is regarded as a key technology.A ground surface experiment was performed of a heat accumulation system with LiF-CaF2 serving as the PCM and dry air as a working medium.On this basis,the mathematical models were established respectively for the heat accumulation unit tubes filled with pure PCM and FCPCM（foam compound phase-change material） under the corresponding conditions.The numerical calculation results show that the calculated values of the pure PCM heat accumulation unit tubes are in very good agreement with the test ones,proving the validity of the calculation model.In addition,a comparison was made with the calculated value of the heat accumulation unit tubes filled with FCPCM.The comparison result indicates that filling with foam can strengthen the heat transfer performance of the PCM,thereby enhancing the thermal performance of the heat accumulation system.