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Study on Thermal Storage/Thermal Release Characteristics of PhaseChange Materials in Solar Collector with Inserted Heat Pipe(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年03期
Page:
1-8
Research Field:
动力工程及工程热物理
Publishing date:

Info

Title:
Study on Thermal Storage/Thermal Release Characteristics of PhaseChange Materials in Solar Collector with Inserted Heat Pipe
Author(s):
Xia Man1; Wang Xiaoyu1; Wu Wei1; 2; Huang Jinyan1; Qin Zhixuan1; Yang Chen1; Liao Yangsang1
(1.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China)(2.Engineering Laboratory of Energy System Conversion and Emission Reduction of Jiangsu Province,Nanjing Normal University,Nanjing 210023,China)
Keywords:
solar collector with inserted heat pipe; phase change energy storage; capric acid; buoyancy; numerical simulation
PACS:
TK519
DOI:
10.3969/j.issn.1672-1292.2020.03.001
Abstract:
In this study,a kind of energy storage type solar collector with inserted heat pipe is proposed,and the phase change material(PCM)is filled between the solar vacuum tube and the evaporation section of the oscillating heat pipe to improve the instantaneous collecting efficiency of the collector. In order to grasp the characteristics of phase change heat storage/release heat process in the collector,a three-dimensional model of a solar collector with inserted heat pipe is established by using Gambit software. Based on the solidification & melting model in FLUENT,the melting process of capric acid(CA)which is used as PCM is numerically simulated. The comparison and analysis of the vacuum tube considering natural convection are made by using Boussinesq approximation. Temperature distribution,liquefaction rate,and temperature change curves at different measurement point to explore the effect of buoyancy in the vacuum tube on the heat transfer flow mechanism during phase change energy storage. The results show that natural convection plays a vital role in the melting process of PCM,and that the temperature rises faster at the top of the vacuum tube than that at the bottom. The effect of buoyancy during the solidification process can be ignored. In the vacuum tube placed vertically,the heat transfer mode of the heat storage process in the axial direction,is mainly heat conduction at the solid sensible heat and the phase change heat storage stage,and at the liquid sensible heat storage stage is mainly convective heat transfer. In the radial direction,heat conduction is always the main factor.

References:

[1] GRISSA K,BENSELAMA A M,LATAOUI Z,et al. Performance of a cylindrical wicked heat pipe used in solar collectors:Numerical approach with Lattice Boltzmann method[J]. Energy Conversion & Management,2017,150:623-636.
[2]XU R J,ZHANG X H,WANG R X,et al. Experimental investigation of a solar collector integrated with a pulsating heat pipe and a compound parabolic concentrator[J]. Energy Conversion & Management,2017,148:68-77.
[3]张维蔚,王甲斌,田瑞,等. 热管式真空管太阳能聚光集热系统传热特性分析[J]. 农业工程学报,2018,34(3):202-209.
[4]张云峰,夏寻,罗嵩容,等. 磁纳米流体热管太阳能集热装置换热性能试验[J]. 热能动力工程,2018,33(2):117-123.
[5]曾冬琪,李慧,代彦军. 内插管式太阳空气集热器阵列集热性能与流动阻力研究[J]. 太阳能学报,2014,35(3):546-552.
[6]袁颖利,李勇,代彦军,等. 内插式太阳能真空管空气集热器实验研究[J]. 太阳能学报,2010,31(11):1429-1433.
[7]DAN N N,SMYTH M,HAGHIGHAT F,et al. Experimental performance evaluation and comparative analyses of heat pipe and direct flow augmented solar collectors[J]. Applied Thermal Engineering,2013,60(1/2):225-233.
[8]VERDIER D,FALCOZ Q,FERRIERE A. Design of a protection thermal energy storage using phase change material coupled to a solar receiver[J]. High Temperature Materials and Processes,2014,33(6):509-523.
[9]ABDELSALAM M Y,TEAMAH H M,LIGHTSTONE M F,et al. Hybrid thermal energy storage with phase change materials for solar domestic hot water applications:Direct versus indirect heat exchange systems[J]. Renewable Energy,2020,147:77-88.
[10]PAPADIMITRATOS A,SOBHANSARBANDI S,POZDIN V,et al. Evacuated tube solar collectors integrated with phase change materials[J]. Solar Energy,2016,129:10-19.
[11]邹勇,仇汝冬,王霞. 石蜡相变材料蓄热过程的模拟研究[J]. 储能科学与技术,2020,9(1):101-108.
[12]KANT K,SHUKLA A,SHARMA A. Heat transfer studies of building brick containing phase change materials[J]. Solar Energy,2017,155:1233-1242.
[13]LIBEER W,RAMOS F,NEWTON C,et al. Two-phase heat and mass transfer of phase change materials in thermal management systems[J]. International Journal of Heat and Mass Transfer,2016,100:215-223.
[14]杨智舜,陈丽华,夏振华. 固液相变材料储能过程传热机制的数值模拟[J]. 储能科学与技术,2019,8(6):1217-1223.
[15]高旭娜,吴薇,孟志军,等. 蓄能型振荡热管太阳能集热器热性能[J]. 农业工程学报,2017,33(16):234-240.
[16]费华,顾庆军,王林雅,等. 癸酸-棕榈酸二元复合相变材料的相变特性研究[J]. 太阳能学报,2020,41(1):80-85.
[17]CHANDRMANI Y,RASHMI R S. Experimental analysis for optimum thermal performance and thermophysical parameters of MWCNT based capric acid PCM by using T-history method[J]. Powder Technology,2020,364:392-403.

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Last Update: 2020-09-15