| Author | Niwat Tamnanthong |
| Call Number | AIT RSPR no. ET-86-19 |
| Subject(s) | Sugar factories--Energy consumption
|
| Note | A research study (6 credits) 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 | The energy consumption by the steam generation and
evaporation systems in the Khon Kaen Sugar Mill, located in Khon
Kaen province, is investigated. The capacity of bagasse fired
boiler is 80 T/h and the evaporation unit is a quintuple effects
type evaporator.
The energy and availability analyses are used to identify
the locations, types and magnitudes of the losses. The results of
energy and availability analyses show that the first and second
law efficiencies for the best case of the boiler are 59.63% and
21.31%, and for the worst case are 57.97% and 20.3 5%
respectively. In case of the evaporation unit, the first and
second law efficiencies for the best case are 94.77 % and 71.12%,
and for the worst case are 94.08% and 66.55% respectively.
Based on the first and second law analyses, energy
conservation measures are suggested to improve the efficiencies
of the systems. Major energy conservation measures suggested are , installation of bagasse dryer and reduction of excess air
supplied to the boiler
The method of drying bagasse with flue gas is a l so studied.
The maximum possible saving of bagasse by means of drying is
expected to be 976,000 Baht per boiler per milling season, at the
price of bagasse to be 25 0 Baht per ton. Assuming the heat
exchanger effectiveness as 0.7, the maximum permissible costs of
the dryer at the interest rate of 15% per annum with payback
period of 2 years is 1,316, 000 Baht and with payback period of 5
years is 2 ,713,000 Baht.
At present , about 140 % of excess air is charged to the
boiler. If it is possible to reduce the amount of excess air,
further saving of bagasse is expected • A preliminary calculation
to save bagasse is shown and indicates t hat 617,000 Baht per
boiler per milling season can be saved. Further saving is
possible by incorporating good energy management along with the
recommended measures. |
| Year | 1986 |
| Type | Research Study Project Report (RSPR) |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Prida Wibulswas
|
| Examination Committee(s) | Bhattacharya, Sribas C. ;Tentscher, Wolfgang |
| Scholarship Donor(s) | USAID-ASEAN |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1986 |