| Author | Fu, Yonggang |
| Call Number | AIT Thesis no.ET-99-13 |
| Subject(s) | Heat--Transmission
|
| 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 | Knowledge and understanding of heat transfer through a roof to an air-conditioned
building have become a necessity for providing comfort of human being as well as for rational
use of energy. The mechanism of heat transfer is a dynamic phenomenon influenced by many
factors such as instantaneous solar radiation, thermal properties of materials, ambient and
interior temperature.
The objective of the experiments was to study the Thermal performance of a kind of
reflectible surface-TYVEK in reducing the heat transfer. TYVEK was installed as ceiling with
different configurations, and it was used to compared with other ceiling materials-cellocrate
and acoustic board, results from measurement presented a significant reduction in heat flux
through ceiling of TYVEK as ceiling than other ceiling materials. TYVEK installed as flat
ceiling with forced ventilation was proved to be the best configuration in case of slope roof
type, and TYVEK installed as flat ceiling in case of flat roof type was proved to be the best
confoguration.
This thesis also studied the shading effect of a three dimension object such as a tree ( the
tree is assumed to be a ellispsoidal object by its shape), method has been developed to
calculate the shaded area cast by a tree on an arbitrary plane at any given time, Experiments
were conducted to evaluate the shading effect in reducing heat transfer through ceiling with
flat roof when there was a shade on it.
A computer model simulating heat transfer mechanism in the attic was used to calculate
heat flux and temperature, finite difference method was used in that model to consider the
transient heat transfer situation, good agreement was found between measurement and
simulation which proved the validity of the model. |
| Year | 1999 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| 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 ;Pham Hoang Luong; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1999 |