| Author | Kewin Morya |
| Call Number | AIT Thesis no. ET-98-34 |
| Subject(s) | Heat--Transmission
|
| Note | A thesis submitted in partial fulfillment of the requirements
for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Currently, professionals involved in building energy use realize the significance of
windows in its relevance to building air conditioning, therefore high-performance windows
are increasingly used. One result of this trend is the added complexity in evaluating energy
performance of window systems . However, the measurement of performance of every kind of
windows using a standard laboratmy is very expensive and requires much time. Alternatively
use of mathematical model combined with some basic experiments are considered cheaper
and simpler to carry out. For this reason, a term called solar heat gain coefficient, SHGC
which is the ratio of heat gain to solar radiation incident on windows has been devised to rate
window performance under a set of environmental conditions. ASHRAE Handbook of
Fundamentals contains a set of summer conditions as reference for use with SHGC in
assessing the size of typical heat gain .
In this thesis the value of SHGC of a window system is obtained in two ways. In the
first method simple experiment was conducted under real environmental condition. Solar
transmittance and solar absorptance of glazing were measured and presented as time function .
This result in a SHGC which is also a time function. In the second method SHGC was
calculated based on the use of solar-optical prope1ties obtained from window manufacturers , a
simulation through WINDOW 4.1 program and a new method of calculation developed by
Lawrence Berkley National Laboratory (LBNL). This also results in a SHGC as a function of
time. The two methods produce comparable value of SHGC for each type of glazing tested.
Reconcilation of measured and calculated results shows a strong feasibility of applying
a mathematical method to evaluate glazing performance in a hot climate. |
| Year | 1998 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Surapong Chirarattananon; |
| Examination Committee(s) | Attalage, R. A. ;Kumar, S. ; |
| Scholarship Donor(s) | Asian Institute of Technology Partial Scholarship ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1998 |