کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6683835 | 501863 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heat transfer enhancement in latent heat thermal storage systems: Comparative study of different solutions and thermal contact investigation between the exchanger and the PCM
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Heat transfer enhancement in latent heat thermal storage systems: Comparative study of different solutions and thermal contact investigation between the exchanger and the PCM Heat transfer enhancement in latent heat thermal storage systems: Comparative study of different solutions and thermal contact investigation between the exchanger and the PCM](/preview/png/6683835.png)
چکیده انگلیسی
Latent heat storage is a very efficient technique because of the high energy density of Phase Change Materials (PCM). However, these materials have low thermal conductivities which limit their use for industrial applications requesting a large power density. The purpose of this study is to present an experimental thermal energy storage using a phase change material associated with various configurations of conductive structures: finned exchangers, graphite powder and Expanded Natural Graphite (ENG) matrix. The experimental thermal conductivity enhancer setup consists of a heat exchanger tube. The outer annular portion of the exchanger is filled with the PCM. The Overall Heat Transfer Coefficient (OHTC) between the fluid and the PCM is measured for each configuration. PCM embedded in an ENG matrix appears to be the best configuration with an OHTC of about 3000Â WÂ mâ2Â Kâ1 and confirms the interest of such a storage device for industrial processes. A study of the thermal properties of this composite material is detailed. The measured thermal conductivity of the ENG/PCM composite is about 100 times greater than the conductivity of the PCM alone. A numerical model for the simulation of the heat transfer within such a material is developed by an enthalpy method in an axisymmetric geometry. It is used for the identification of the thermal contact resistance between the tube and the composite material. The numerical simulations are also compared to the experimental results and used to investigate the impact of the thermal contact resistance on the heat transfer process of the LHTS system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 166, 15 March 2016, Pages 107-116
Journal: Applied Energy - Volume 166, 15 March 2016, Pages 107-116
نویسندگان
Kevin Merlin, Didier Delaunay, Jérôme Soto, Luc Traonvouez,