| Author | Supaluk Pukdee |
| Call Number | AIT Thesis no. ET-90-16 |
| Subject(s) | Heat--Transmission
|
| Note | A thesis submitted in partial fulfillment of the requirements of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The most significant cause of energy consumption in air-conditioned building
in hot climate is heat transfer through the building envelop . Energy performance
standards of many countries include a stipulation on the allowable si7.e of the
estimate for the average of such transfer.
For most part of the world the ASHRAE method for assessment of the surface
heat transfer, which is part of the overall process of heat transfer across the
building envelope, is adequate. But if a more accurate assessment is required, or
for the case of a country with low wind speed (and low convection heat transfe1ยท),
or with relatively thin wall, a more accurate method is required.
A method for surface heat transfer computation which takes proper account
of thermal radiation exchangers, and uses standard empirical formulas for convection
heat transfer (which utih7.es wind speed. records) is used in this study. The discrete
Z transfer approach is adopted for the calculation of the heat transfer across wall
of finite thermal capacity, as well as the finite difference method. The methodology
developed for the computation of the heat transfer through the glazing, and the
transfer through wall is coded into a PASCAL computer program.
To test the methodology, an air-conditioned room to Bangkok was chosen for
study. Measurements for external environmental variables : ambient temperature,
solar radiation and wind speed on the test surface, and for internal environmental
variables : temperature, transmitted. solar radiation, were all recorded, as well as
the heat flux at the internal wall surface.
The characteristic and properties of the wall of the test room were inputted
into the computer program. Both the recorded external environmental values and
the internal environmental values were used to drive the PASCAL program. There
is a good agreement between the computation results and the measurement results. |
| Year | 1990 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Surapong Chiraratananon
|
| Examination Committee(s) | Exell, Robert H.B. ;Bhattacharya, Sribas C.
|
| Scholarship Donor(s) | DAAD |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |