| Author | Thumnoon Funaranarth |
| Call Number | AIT Thesis no.IE-94-18 |
| Subject(s) | Boilers--Maintenance and repair
|
| Note | A Thesis submitted in partial fulfillment of the requirement for the degree of
Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. IE-94-18 |
| Abstract | The boiler is a very important system of a thermal power plant as it produces
steam necessary for the electrical power generation. EGAT decided to embark on major
renovations of the boilers at North Bangkok Generating station to improve the
efficiency and to reduce environmental pollution.
The purpose of the present study is to emphasize developing and implementing
policies or systematic decision making for the availability improvement. The developed . ·
models are subject to the plant constraints and to minimizing the costs of maintenance
of the existing boilers at the North Bangkok Generating Unit 2.
The problems of daily preventive cleaning and inspection on boiler components
such as burners and air-heater are introduced. A suitable maintenance schedule for
cleaning the air- heater and boiler tubes for operating the soot blowers CY.Cle is
developed.
For the burner, mathematical model is developed and analyzed, and it can be
demonstrated how an optimal maintenance policy can be achieved. The policy
suggested here is the age replacement model in which a burner is maintained at a
planned replacement period. An optimal maintenance policy should balance the cost of.
failures of a unit during operation against the cost of planned maintenance. ·
For the case of air-heater, two mathematical models are developed to
minimize the sum of cleaning costs and excess fuel costs between surveys. The cost
incurred using an overhaul policy, where the plant deteriorates with operation, are
overhaul and increased fuel costs. The operation cost are termed excess flue cost.
The results obtained from the mathematical models are analyzed, and ·realistic
schedules from the results are developed for case of implementation. |
| Year | 1994 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. IE-94-18 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Engineering (IE) |
| Chairperson(s) | Nagarur, Nagendra N. |
| Examination Committee(s) | Fujiwara, Okitsugu ;Paul, Himangshu
|
| Scholarship Donor(s) | Electricity Generating Authority of Thailand ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1994 |