| Author | Pipat Chaiwiwatworakul |
| Call Number | AIT Thesis no. ET-98-18 |
| Subject(s) | Daylight
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Presently, the interior illuminance due to daylight transmission through window are
calculated by two methods which are daylight factor method and lumen method. Both
methods perform a good prediction of indoor illuminance, however, they still provide some
constraints based on their assumptions and calculation format.
The study of this thesis deals with the sidelighting calculation. The objective is to
develop computer calculation tool for estimating interior illuminance which can reduce the
constraints of the existing tools (Daylight factor method and Lumen method). Based on
developed computer program, the interior illuminance consists of direct component and
internal reflected component. The direct component at each point in the lit space is calculated
by integrating the illuminance due to the light source visible through the window by that
point. The internal reflected component is calculated by using flux transfer method.
Two experiments were conducted to validate the developed computer program. By the
experiment no. l , direct and internal reflected component in the room were measured.
Subsequently, the experiment no.2 was set up for measuring interior illuminance due to the
daylight transmission through window. The data recorded from both experiments were
compared to the results obtained from daylight calculation tools.
Comparing the illuminance calculated by each estimation tools with the results
obtained from the experiment no.1, it found that the results calculated by computer program
could achieve more accuracy than those obtained from the daylight factor and lumen method.
Thereafter, the illuminance from experiment no.2 and computer program were compared.
From the comparing results, the illuminance calculated by computer program and obtained
from the experiment correspond each other and the maximum of average percent difference
of these two data is about 25 percent. |
| 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) | Kumar, Sivanappan ;Attalage, Rahula Anura; |
| Scholarship Donor(s) | Asian Institute of Technology Partial Scholarship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1998 |