| Author | Siriwat Chedsi |
| Call Number | AIT Thesis no.ET-96-28 |
| Subject(s) | Daylighting--Thailand
|
| Note | A thesis submitted in partial fulfillment of the requirements
for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Direct beam sunlight is considered to be as a light source for deep interior space. This sunlight is transported into the plenum of the room by reflecting and transmitting through the translucent material sheets to illuminate the room. This experimental study presents the computer calculation program in Turbo Basic Language to predict the illuminance on different points of the plenum. The computer program written for the study bases on the assumptions that direct sunlight and diffuse sunlight are the main two components of sunlight which incident on the plenum surface. The configuration of translucent material in a rectangular plenum is the input of the calculation program in addition to the time, date and properties of sunlight and plenum surface. The output of this calculation is written in text file form. Three experiments were conducted in the experiment room by changing the configuration of translucent material on the ceiling and some properties on the surface. Results from the experiments are compared with results from the calculation program to prove that the outcome from the calculation program is reliable. Surface temperature and heat flux transfer across the plenum wall were taken into consideration. They were measured and presented to reveal its mechanism in the process. The results of this study show that the calculation program P2 provides reasonable results for illuminance calculation. Heat flux transfer from the transportation lighting system, plenum, to the experiment room in this application is around 10-30 Watt per square meter depends on time, properties of the plenum surface and configuration of translucent material. In Experiment Scenario No.1 and No.3, the illuminance on the workplane in the room can meet the standard requirement which is around 500 Lux while this illuminance in Experiment Scenario No.2 is around 200 Lux. |
| Year | 1996 |
| 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 Chiraratananon; |
| Examination Committee(s) | Bhattacharya, Sribas C.;Kumar, Sivanappan; |
| Scholarship Donor(s) | Electricity Generating Authority of Thailand; |
| Degree | Thesis (M.Eng.) - Asian Institue of Technology, 1996 |