NDLI: Numerical simulation of phase change heat transfer of a solar flat-plate collector with energy storage

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Numerical simulation of phase change heat transfer of a solar flat-plate collector with energy storage

Content Provider	Springer Nature Link
Author	Peng, Donghua Chen, Zhenqian
Copyright Year	2009
Abstract	The technical feasibility of an innovative solar collector is studied in this paper. A phase change material (paraffin) is used in the solar collector to store solar energy. This type of system combines both collection and storage of thermal energy into a single unit. The major advantages of the phase change stores are their large heat storage capacity and isothermal behavior during the melting and solidifying processes. A negative aspect of paraffin is its low thermal conductivity which increases the melting and solidifying time for paraffin energy storage. In this paper, new aluminum foams infiltrated with paraffin are presented. It presents a two dimensional model describing the melting and solidifying processes of paraffin while accounting for both phase change heat transfer and natural convection. Apparent heat capacity method was used to simulate the melting and solidifying processes of paraffin. The simulation results show that the motion of the hot liquid paraffin plays an important role in increasing the heat transfer between paraffin and top surface of solar collector. The shape profile of the pure paraffin solid-liquid interface is determined by the synergistic relationship between its temperature and velocity field. Though aluminum foams impregnated with paraffin will limit motion of the hot liquid paraffin, the heat transfer ability is greatly improved. The distributions of the temperature in the paraffin with aluminum foams are more homogeneous compared with that of the paraffin without aluminum foams. Thus, use of aluminum foams infused with paraffin improves heat transfer and enhances paraffin’s melting and solidifying rates.
Starting Page	273
Ending Page	280
Page Count	8
File Format	PDF
ISSN	19963599
Journal	Building Simulation
Volume Number	2
Issue Number	4
e-ISSN	19968744
Language	English
Publisher	Tsinghua Press
Publisher Date	2009-12-04
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	solar energy numerical simulation paraffin aluminum foams Environmental Monitoring/Analysis Atmospheric Protection/Air Quality Control/Air Pollution Engineering Thermodynamics, Heat and Mass Transfer Building Construction, HVAC, Refrigeration
Content Type	Text
Resource Type	Article
Subject	Building and Construction Energy

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