文档介绍：Energy Conversion and Management 45 (2004) 263–275
ate/enconman
A review on energy conservation in building applications
with thermal storage by latent heat using phase
change materials
Amar M. Khudhair, Mohammed M. Farid *
Department of Chemical and Materials Engineering, School of Engineering, The University of Auckland,
Private Bag 92019, Auckland, New Zealand
Received 12 December 2002; accepted 24 May 2003
Abstract
Energy storage in the walls, ceiling and floor of buildings may be enhanced by encapsulating suitable
phase change materials (PCMs) within these surfaces to capture solar energy directly and increase human
comfort by decreasing the frequency of internal air temperature swings and maintaining the temperature
closer to the desired temperature for a longer period of time. This paper summarizes the investigation and
analysis of thermal energy storage systems incorporating PCMs for use in building applications. Researches
on thermal storage in which the PCM is encapsulated in concrete, gypsum wallboard, ceiling and floor have
been ongoing for some time and are discussed. The problems associated with the application of PCMs with
regard to the selection of materials and the methods used to contain them are also discussed.
Ó 2003 Elsevier Ltd. All rights reserved.
Keywords: PCM; Latent heat; Encapsulation; Wallboards; Concrete; Under floor heating
1. Introduction
Electrical energy consumption varies significantly during the day and night according to the
demand by industrial, commercial and residential activities, especially in extremely hot and cold
climate countries where the major part of the variation is due to domestic space heating and air
conditioning. Such variation leads to a differential pricing system for peak and off peak periods
of energy use. Better power generation management and significant economic benefit can be
* Corresponding author. Tel.: +64-9-373-7599; fax: +64-9-373-7463.
E-mail address: m.******@auckland.