Shock wave/fire interactions initiated by high explosives have been historically demonstrated as potentially effective ways to control oil well fires or even forest fires in situations where conventional means cannot be applied. However, the mechanisms by which a fire can be extinguished by a shock wave are not well understood. A series of experiments have been conducted involving a moving shoc...

Boiler mempunyai peranan berarti pada PLTU di indonesia. Pipa mengalami kegagalan beroperasi yang diakibatkan kebocoran tube Secondary Superheater - out. Penelitian ini bertujuan untuk memahami mekanisme serta penyebab terjadinya agar diperoleh solusi tepat, sehingga dapat kembali dengan baik. Material pipa adalah jenis ASTM SA 213 T91. kerusakan berupa pecah dan memiliki bibir tipis (thin lip ...

This thesis goes into the task of analysing a bubbling fluidized bed (BFB) bark boiler and the structure of its automatic control system. The boiler being discussed is located at Billerud Karlsborg AB, although the results are to be able to be used on any BFB bark boiler. The main objective is to try to answer the following question: Exists there any changes to be made to the current structure ...

In this paper we compare and discuss the performance of a boiler evaporator system when the system is controlled by a traditional PID-type strategy and when the system is enhanced by using fuzzy logic blocks to provide set-points for the system. The strategy used in fuzzy logic controllers (FLCs) is called fuzzy supervisory control and it generates set-points for the conventional controllers. T...

A concept of "Fractal Fracture Mechanics" for HDR .(Hot Dry Rock) geothermal reservoir design has been developed as an extension of conventional rock fracture mechanics. It is suggested that this concept is successfully applicable to characterize and model subsurface fracture network in HDR geothermal reservoir. Furthermore, this modeling procedure makes it possible to evaluate the thermal ener...

A novel, targeted approach to sootblower activation has been demonstrated recently at a large, T-fired, coal unit. Targeted sootblowing techniques are designed to activate blowers based upon the conditions of the boiler rather than a traditional time and/or sequence based approach. Various approaches have been used in the past to perform targeted sootblowing including neural network based model...

Introduction Intraoperative complications of tracheostomy are well described in the literature. These include hemorrhage, perforation of the walls of the trachea and esophagus, recurrent laryngeal nerve injury, intraoperative fire, pneumothorax and pneumomediastinum, and tube displacement. We present an unusual complication encountered during a routine tracheostomy that resulted from severe tra...

This paper considers an approach to design a controller used for the air-to-fuel ratio (AFR) optimization in the combustion process of a power plant boiler. The optimization of the AFR will reduce the excess air level and improve the combustion efficiency in the boiler system. The combustion improvement indicates boiler operating cost savings. The fuzzy logic controller, which is a method of a ...