摘要
通过对太阳能热动力系统单元热管吸热器进行研究,建立了相应的数学模型,给出了数值解法,运用计算流体力学软件Fluent6．1对其进行了仿真,并把仿真结果同实验结果和基本型吸热器进行了对比。仿真结果表明,热管吸热器中热管高效、均匀的传热性能大大缩小了热管和蓄热容器壁温的波动范围,从而提高了吸热器工作的稳定性和可靠性;热管吸热器提高了PCM(相变蓄热材料)利用率,从而减轻了系统的质量;热管吸热器各蓄热容器内的PCM都能同步、均匀的熔化,从而避免热斑现象;热管吸热器各蓄热容器内的PCM能够同时凝固,从而避免热松脱现象。
Cell heat pipe receiver of solar dynamic system was numericaUy simulated. Accordingly, mathematical model was set up, numerical calculation method was offered, fluid dynamics software named Fluent 6.1 was used to simulate, and calculation results were compared with those of experimental results and basis heat receiver. Simulation results show that heat pipe receiver owns the performance of perfect heat transfer and ideal identical temperature, the axial temperature difference of heat pipe is little, phase change material（PCM） canisters situated in different places of heat pipe can melt simultaneously and uniformly. And heat pipe receiver lightens system mass, improves heat efficiency of system. At the same time, normal operation of wick ensures circumference temperature uniformity of heat pipe, thus heat pipe receiver avoids heat spot. In addition, heat pipe receiver has axial and radial performance of ideal identical temperature. All PCM canisters can freeze simultaneously at the end of eclipse, and freeze fully at last, so heat pipe receiver avoids heat ratcheting.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第13期103-107,共5页
Proceedings of the CSEE
基金
国家自然科学基金项目(50276001)。~~
关键词
热能动力工程
热管吸热器
太阳能热动力
数值仿真
相变蓄热材料
thermal power engineering
heat pipe receiver
solar dynamic
numerical simulation
phase change material
