泡沫铜对相变蓄热系统放热性能的影响
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摘要
采用复合相变材料泡沫铜/纯石蜡,探究其在相变蓄热系统中的放热特性,以及放热过程中石蜡温度变化规律。实验结果表明:复合相变材料泡沫铜/纯石蜡的加入,有效提高了相变蓄热箱内相变材料的当量导热系数,且由于泡沫铜和石蜡之间不同的传热特性,改善了石蜡的温度分布,使得横截面上换热较均匀,加快了石蜡的凝固速率。
The composite phase change material foam copper/pure paraffin was used to investigate the exothermic characteristics of the phase change thermal storage system and the temperature variation of paraffin during the heat release. The experimental result showed that the addition of the composite phase change material foam copper/pure paraffin effectively improves the equivalent thermal conductivity of the phase change material in the phase change thermal storage tank, and the paraffin wax is improved due to the different heat transfer characteristics between the foamed copper and the paraffin. Which makes the heat transfer in the cross section more uniform, and accelerates the solidification rate of paraffin.
The composite phase change material foam copper/pure paraffin was used to investigate the exothermic characteristics of the phase change thermal storage system and the temperature variation of paraffin during the heat release. The experimental result showed that the addition of the composite phase change material foam copper/pure paraffin effectively improves the equivalent thermal conductivity of the phase change material in the phase change thermal storage tank, and the paraffin wax is improved due to the different heat transfer characteristics between the foamed copper and the paraffin. Which makes the heat transfer in the cross section more uniform, and accelerates the solidification rate of paraffin.
引文
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9 黄璞洁,李艳霞,何耀炳,等.集中空调冷凝热回收技术在生活热水供应系统中的应用[J].暖通空调,2011,41(8):54-57,36.Huang Yujie, Li Yanxia, He Yaobing, et al. Application of concentrated air conditioning condensing heat recovery technology in domestic hot water supply system [J]. Heating Ventilating and Air Conditioning, 2011, 41 (8): 54-57,36.
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11 金虹庆.泡沫金属复合相变材料熔化传热过程可视化研究[D].杭州:浙江大学,2017.Jin Hongqing.Study on the visualization of the heat transfer process of foam metal composite phase change materials[D].Hangzhou:Zhejiang University,2017.
2 Xavier P y, Olives S, Mauran S.Paraffin/porous graphite matrix composite as a high and constant power thermal storage material[J]. Shanghai: International Journal of Heat MassTransfer,2001,44(14):2727-2737.
3 吕学文,考宏涛,李敏.膨胀石墨/复合相变材料相变过程的热分析[J].北京:材料导报B;研究篇,2011(2):131-133,137.Lv Xuewen, Kao Hongtao, Li Min. Thermal analysis of phase transformation process of expanded graphite/composite phase change materials [J]. Beijing: Materials Guide B; Research, 2011(2):131-133, 137.
4 Varol Y, Koca A, Oztip H F, et al. Forecasting of thermal energy storage performance of phasechange material in a solar collector using soft computing tech-niques [J]. Beijing: Expert. Syst. Appl.,2010,37(4):2724-2732.
5 吴淑英,童旋,龚曙光,等.纳米石墨烯片/石蜡复合相变蓄热材料的热性质研究[J].化工新型材料,2014,42(7):105-107.Wu Shuying,Tong Xuan,Gong Shuguang,et al.Study on the thermal properties of nanographene/paraffin composite phase change thermal storage materials[J].New Chemical Materials,2014,42(7):105-107.
6 孙龙艳. 石蜡/SiO2核壳结构复合相变材料的制备[D].重庆:重庆大学,2015.Sun Longyan. Preparation of paraffin/SiO2 core-shell composite phase change material [D]. Chongqing: Chongqing University, 2015.
7 张靖驰,盛强,童铁峰,等.石蜡/泡沫碳相变复合材料的制备及蓄热实验[J].功能材料,2016,47(11):11125-11130.Zhang Jingchi, Sheng Qiang, Tong Tiefeng,et al.Preparation and heat storage experiment of paraffin/foam carbon phase change composites[J].Functional Materials,2016,47(11):11125-11130.
8 华维三,章学来,罗孝学,等.纳米金属/石蜡复合相变蓄热材料的实验研究[J].太阳能学报,2017,38(6):1723-1728.Hua Weisan, Zhang Xuelai, Luo Xiaoxue, et al.Experimental study on nano-metal/paraffin composite phase change thermal storage materials[J].Acta Solar Energy,2017,38(6):1723-1728.
9 黄璞洁,李艳霞,何耀炳,等.集中空调冷凝热回收技术在生活热水供应系统中的应用[J].暖通空调,2011,41(8):54-57,36.Huang Yujie, Li Yanxia, He Yaobing, et al. Application of concentrated air conditioning condensing heat recovery technology in domestic hot water supply system [J]. Heating Ventilating and Air Conditioning, 2011, 41 (8): 54-57,36.
10 陈华,任喜悦,谭凯中,等.带相变蓄热小型热泵冷凝热回收性能实验研究[J].热科学与技术,2014,13(4):304-309.Chen Hua, Ren Sheng, Tan Kaizhong, et al. Experimental study on condensation heat recovery performance of a small heat pump with phase change heat storage[J]. Thermal Science and Technology, 2014, 13(4): 304-309.
11 金虹庆.泡沫金属复合相变材料熔化传热过程可视化研究[D].杭州:浙江大学,2017.Jin Hongqing.Study on the visualization of the heat transfer process of foam metal composite phase change materials[D].Hangzhou:Zhejiang University,2017.