水蓄能床与相变蓄能床的性能对比及模拟优化  

Performance comparison and simulation optimization of water energy storage bed and phase change material(PCM) energy storage bed

作　　者：贺鑫[1] 马秀琴[1] 张宁 杨振民[1] HE Xin1, MA Xiuqin1, ZHANG Ning1＇2, YANG Zhenmin1(1. School of Energy and Environmental Engineering, Hebei University of Technology, Tiaaajin 300401, China; 2. Tiaaajin Academy of Environmental Sciences, Tiaaajin 300191, China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401 [2]天津市环境保护科学研究院,天津300191

出　　处：《河北工业大学学报》2018年第3期86-92,共7页Journal of Hebei University of Technology

基　　金：河北省节能减排技术转移中心省级技术转移示范项目;河北省科技计划项目(16987624D)

摘　　要：针对传统供暖方式污染环境、不节能、不安全等弊端,设计了一种新型蓄能床,蓄能介质为高比热的水和拥有潜热的相变材料.通过供水温度35℃、40℃和45℃3组实验测量的床面温度和散热量,来比较水蓄能床和相变蓄能床的热工性能.结果表明:40℃为最佳供水温度,该温度下水储能和相变储能的床面平均温度分别为35.3℃和32.9℃,均在人体可适应温度29~37℃范围内,但结合人体舒适温度为30~35℃的特点相变储能明显优于水储能.随供水温度的提高,床面升温速度加快,相变床升温变化更显著.白天水蓄能的床面温度比相变蓄能高2℃左右,但睡眠阶段相变蓄能热稳定更好.床面散热量两者相差不多,但夜间相变床存在恒温放热阶段.此外,通过模拟相变材料的加热融化过程,分析了管径、供热温度、管间距和相变材料导热系数对融化速率的影响,结果表明:以上4种因素对融化速率均有不同程度影响,减小管间距和增大导热系数可有效增大融化速率.A new type of energy storage bed is designed for solving the pollution of the environment, leak of energy eon- smwation and safety and other defects in traditional heating. Water with high specific heat and phase change material （PCM） with latent heat are used to be storage medium. The themlal performance of the PCM bed and the water bed are compared by measuring the bed temperature and heat dissipation by the three groups of water supply temperature of 35 ~C, 40 ~C and 45 ~C. The results show that 40 ~C is the best water supply temperature. At this temperature, the bed av- erage temperature of the water storage and phase change energy storage are about 35.3 ~C and 32.9 ~C, which are in hu- man body adapting temperature range of 29-37 ~C. But Combined with human comfort temperature 30-35 ~C, phase change energy storage is better than water storage. With the increase of water supply temperature, the heating rate of bed increases, and the heating change rate of PCM bed is more significant. During the daytime, the bed temperature of the wa- ter bed is 2 ~C greater than that of the PCM bed, but heat stability of the PCM bed is better in the sleep stage. Although heat dissipation of the two beds is ahnost the same, but the PCM bed poses constant exothennie temperature at night. In addition, the effects of diameter, heating temperature, tube spacing and thermal conductivity of PCM on the melting rate were analyzed by simulating the heating and melting process of PCM. The results show that the above four factors have different effects on the melting rate, and the reduction of the tube spacing and the increase of the thm^ml conductivity can effectively increase the melting rate.

关 键 词：水蓄能床 相变蓄能床 床面温度 散热量 管间距 导热系数 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]