Effects of PCM arrangement and natural convection on charging and discharging performance of shell-and-tube LHS unit

被引：92
作者：
Tao, Y. B. [1 ]
Liu, Y. K. [1 ]
He, Ya-Ling [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Minist Educ, Key Lab Thermofluid Sci & Engn, Xian 710049, Shaanxi, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2017年 / 115卷
基金：
中国国家自然科学基金;
关键词：
Latent heat storage; Performance enhancement; PCM arrangement; Natural convection; THERMAL-ENERGY STORAGE; PHASE-CHANGE MATERIALS; LATENT-HEAT STORAGE; MOLTEN-SALT; TRANSFER ENHANCEMENT; CARBON NANOTUBES; CONDUCTIVITY; SYSTEM; SOLIDIFICATION; OPTIMIZATION;
D O I：
10.1016/j.ijheatmasstransfer.2017.07.098
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The low thermal conductivity of phase change material (PCM) seriously weakens the heat charging and discharging rates of latent heat storage (LHS) system. High efficient performance enhancement method is urgently needed. In present study, three-dimensional simulation models with and without natural convection were established for a shell-and-tube LHS unit to investigate the effects of PCM arrangements and natural convection on the charging and discharging performance. The results show that compared of the commonly used shell-and-tube LHS unit with PCM in shell side, the LHS unit with PCM in tube side can significantly enhance heat storage rate under the same working conditions and overall dimensions. Natural convection has significant effects on charging performance, espeically when PCM is arranged in tube side. When natural convection is neglected, PCM melting time can be reduced by 25.4% and latent heat storage rate can be enhanced by 36.6% with PCM arranged in tube side. When natural convection is considered, PCM melting time can be reduced by 34.4% and latent heat storage rate can be enhanced by 54.2% with PCM arranged in tube side. However, natural convection has little effects on discharging performance even if for the model with PCM in tube side. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：99 / 107
页数：9
相关论文
共 36 条
[1]   Numerical analysis of the thermal behaviour of a shell-and-tube heat storage unit using phase change materials [J].
Adine, Hamid Ait ;
El Qarnia, Hamid .
APPLIED MATHEMATICAL MODELLING, 2009, 33 (04) :2132-2144
[2]   Internal and external fin heat transfer enhancement technique for latent heat thermal energy storage in triplex tube heat exchangers [J].
Al-Abidi, Abduljalil A. ;
Mat, Sohif ;
Sopian, K. ;
Sulaiman, M. Y. ;
Mohammad, Abdulrahman Th. .
APPLIED THERMAL ENGINEERING, 2013, 53 (01) :147-156
[3]   Fast charging of thermal energy storage systems enabled by phase change materials mixed with expanded graphite [J].
Bahraseman, Hamidreza Ghasemi ;
Languri, Ehsan Mohseni ;
East, Joshua .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 109 :1052-1058
[4]   Effects of different multiple PCMs on the performance of a latent thermal energy storage system [J].
Fang, Ming ;
Chen, Guangming .
APPLIED THERMAL ENGINEERING, 2007, 27 (5-6) :994-1000
[5]   Finite-element analysis of cyclic heat transfer in a shell-and-tube latent heat energy storage exchanger [J].
Gong, ZX ;
Majumdar, AS .
APPLIED THERMAL ENGINEERING, 1997, 17 (06) :583-591
[6]   Improvement of the thermal conductivity of a phase change material by the functionalized carbon nanotubes [J].
Ji, Peijun ;
Sun, Huanhuan ;
Zhong, Yunxia ;
Feng, Wei .
CHEMICAL ENGINEERING SCIENCE, 2012, 81 :140-145
[7]   High-temperature phase change materials for thermal energy storage [J].
Kenisarin, Murat M. .
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2010, 14 (03) :955-970
[8]   Energy and exergy analyses of medium temperature latent heat thermal storage with high porosity metal matrix [J].
Kumar, Ashish ;
Saha, Sandip K. .
APPLIED THERMAL ENGINEERING, 2016, 109 :911-923
[9]   NUMERICAL-SIMULATION OF A SHELL-AND-TUBE LATENT-HEAT THERMAL-ENERGY STORAGE UNIT [J].
LACROIX, M .
SOLAR ENERGY, 1993, 50 (04) :357-367
[10]   Heat transfer characteristics of phase change nanocomposite materials for thermal energy storage application [J].
Li, TingXian ;
Lee, Ju-Hyuk ;
Wang, RuZhu ;
Kang, Yong Tae .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2014, 75 :1-11
1234