改性八水氢氧化钡相变放热特性试验研究  

Experimental study on phase-change discharging characteristics of modified barium hydroxide octahydrate

作　　者：窦鹏 于强 樊占胜 智瑞平 鹿院卫[1] 吴玉庭[1] 杨桂春 DOU Peng;YU Qiang;FAN Zhansheng;ZHI Ruiping;LU Yuanwei;WU Yuting;YANG Guichun(Key Laboratory of Enhanced Heat Transfer and Energy Conservation/Beijing Key Laboratory of Heat Transfer and Energy Conversion,Beijing University of Technology,Beijing 100124,China;China Huanqiu Contracting&Engineering(Beijing)Company Limited,Beijing 102299,China)

机构地区：[1]北京工业大学传热强化与过程节能教育部重点实验室暨传热与能源利用北京市重点实验室,北京100124 [2]中国寰球工程有限公司北京分公司,北京102299

出　　处：《华电技术》2021年第7期47-53,共7页HUADIAN TECHNOLOGY

基　　金：国家重点研发计划项目(2017YFB0903603);国家自然科学基金项目(52076006)。

摘　　要：蓄热技术可有效解决可再生能源难以并网的问题。为了获得蓄热密度大的相变材料八水氢氧化钡在套管内的相变传热特性,针对课题组制备的改性八水氢氧化钡展开试验研究,分析改性八水氢氧化钡在套管内的相变放热特性。研究了冷却水进口温度、流量等参数对改性八水氢氧化钡相变过程及传热性能的影响。结果表明:提高冷水进口流量可以缩短改性八水氢氧化钡相变放热时间,但过高的进口流量会降低换热功率;提高冷水进口温度对改性八水氢氧化钡相变放热时间的影响较小,但会降低换热功率。在课题试验范围内,获得最佳进口流量为80 L/h,最大平均换热功率为251 W。Thermal storage technology can effectively solve the difficulty of renewable energy's grid connection.In order to obtain the phase-change heat transfer characteristics of modified barium hydroxide octahydrate in double pipes,our team prepared modified barium hydroxide octahydrate and studied its phase-change discharging characteristics in double pipes through experiments.The effects of cooling water temperature at inlet and flow rate on the phase transformation process and heat transfer performance of modified barium hydroxide octahydrate were studied.The results show that increasing the inlet flow rate of cold fluid can shorten the phase-change heat-discharge time of modified barium hydroxide octahydrate,but excessive inlet flow rate would reduce the heat transfer power;increasing the cooling water temperature at inlet has little effect on the phase-change discharging time,but it would reduce the heat transfer power as well.In the range of the experiment,the optimum inlet flow rate is 80 L/h and the maximum average heat transfer power is 251 W.

关 键 词：可再生能源 蓄热 相变材料 相变传热 八水氢氧化钡 套管换热器 

分 类 号：TK124[动力工程及工程热物理—工程热物理]