The study of constrained and unconstrained PCM melt in a square enclosure
The use of a latent heat storage system using PCM is an effective way of storing thermal energy. Over the years, many studies of PCM have incorporated the use of various shaped enclosures such as spherical and rectangular, to study its melting behaviour. However, the use of square shaped enclosures...
Saved in:
Main Author: | |
---|---|
Other Authors: | |
Format: | Final Year Project |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/10356/54116 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-54116 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-541162023-03-04T19:37:06Z The study of constrained and unconstrained PCM melt in a square enclosure Morven Louis Thevathasan. Tan Fock Lai School of Mechanical and Aerospace Engineering DRNTU::Engineering The use of a latent heat storage system using PCM is an effective way of storing thermal energy. Over the years, many studies of PCM have incorporated the use of various shaped enclosures such as spherical and rectangular, to study its melting behaviour. However, the use of square shaped enclosures in PCM studies, are limited. This report will focus on the effects of temperature and free surface in constrained and unconstrained n-Octadecane contained in a square enclosure. The experiment was carried out in three stages. The first stage was to study the unconstrained PCM melting under constant temperatures of 40oC and 50oC. The second stage was to study free surface effects in the melting of constrained and unconstrained PCM under constant temperature of 40oC. While, the final stage was to study the overall effects of free surface in PCM. The PCM was immersed in water and exposed to a constant temperature, maintained by a circulatory bath, until full melting was obtained. Experimental results concluded that the effects of temperature exposed to the PCM had a significant influence towards its melt rate and the nature of internal convection present. The melting pattern of PCM indicated that surface area of solid PCM in contact with the liquid played an effective role in heat transfer. In the study of free surface effects on n-Octadecane in a square enclosure, it was proven that with the inclusion of free surface, significant changes were observed in the melting behaviour of the PCM. This was predominantly due to the presence of air. Lastly, constrained melting of n-Octadecane showed the existence of thermally stable and unstable fluid layers. In comparison with similar experiments performed previously, it is concluded that such stable and unstable fluid layers are present regardless the manner of encapsulation and the existence of free surface. Bachelor of Engineering (Mechanical Engineering) 2013-06-13T08:39:07Z 2013-06-13T08:39:07Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/54116 en Nanyang Technological University 92 p. application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
DRNTU::Engineering |
spellingShingle |
DRNTU::Engineering Morven Louis Thevathasan. The study of constrained and unconstrained PCM melt in a square enclosure |
description |
The use of a latent heat storage system using PCM is an effective way of storing thermal energy. Over the years, many studies of PCM have incorporated the use of various shaped enclosures such as spherical and rectangular, to study its melting behaviour. However, the use of square shaped enclosures in PCM studies, are limited. This report will focus on the effects of temperature and free surface in constrained and unconstrained n-Octadecane contained in a square enclosure. The experiment was carried out in three stages. The first stage was to study the unconstrained PCM melting under constant temperatures of 40oC and 50oC. The second stage was to study free surface effects in the melting of constrained and unconstrained PCM under constant temperature of 40oC. While, the final stage was to study the overall effects of free surface in PCM. The PCM was immersed in water and exposed to a constant temperature, maintained by a circulatory bath, until full melting was obtained. Experimental results concluded that the effects of temperature exposed to the PCM had a significant influence towards its melt rate and the nature of internal convection present. The melting pattern of PCM indicated that surface area of solid PCM in contact with the liquid
played an effective role in heat transfer. In the study of free surface effects on n-Octadecane in a square enclosure, it was proven that with the inclusion of free surface, significant changes were observed in the melting behaviour of the PCM. This was predominantly due to the presence of air. Lastly, constrained melting of n-Octadecane showed the existence of thermally stable and unstable fluid layers. In comparison with similar experiments performed previously, it is concluded that such stable and unstable fluid layers are present regardless the manner of encapsulation and the existence of free surface. |
author2 |
Tan Fock Lai |
author_facet |
Tan Fock Lai Morven Louis Thevathasan. |
format |
Final Year Project |
author |
Morven Louis Thevathasan. |
author_sort |
Morven Louis Thevathasan. |
title |
The study of constrained and unconstrained PCM melt in a square enclosure |
title_short |
The study of constrained and unconstrained PCM melt in a square enclosure |
title_full |
The study of constrained and unconstrained PCM melt in a square enclosure |
title_fullStr |
The study of constrained and unconstrained PCM melt in a square enclosure |
title_full_unstemmed |
The study of constrained and unconstrained PCM melt in a square enclosure |
title_sort |
study of constrained and unconstrained pcm melt in a square enclosure |
publishDate |
2013 |
url |
http://hdl.handle.net/10356/54116 |
_version_ |
1759856194689695744 |