INGENIEUR
INGENIEUR
Figure 6: The calculation of cooling tower session window( value inserted)
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An expert system for fault diagnosis for gear boxes in wind turbines( Ling et al., 2012)
An expert system called Kappa-PC Software has been used to provide a standardised methodological approach for solving important and complex problems normally done by human experts( Terry, 1995). Kappa-PC is a knowledge based expert system shell that helps in developing an expert system( Mansyur et al., 2013). The main menu of the developed Kappa-PC system is shown in Figure 3. The main purpose of the developed expert system is to give a solution and recommendation to the person in charge when experts are not around. The system will generate friendly prompts according to the user data. Friendly prompts will be shown as advice to the user on how to tackle problems in the current situation. The recommendation prompts can give optimal advice on what to do in the next following steps or propose to send back to factory for service in a worst case scenario. Figure 4 shows a fault diagnosis expert system for an Air Handling Unit( AHU). Figure 5 shows a Water Cooled Packed Unit( WCPU) in an AHU room.
Figure 6 shows a developed expert system to calculate a cooling tower’ s total loss which consists of evaporation loss, drift loss, blow down loss and total loss. By identifying the values needed to obtain the total loss of a cooling tower in a building, the system acts as a platform to identify the working condition of the cooling tower as well as the alarm alert system. The algorithm input in Figure 6 can identify whether the cooling tower system is running ideally or over-designed by comparing the total loss with the design specifications.
Summary
In conclusion, an expert system is an artificial intelligence programme that is able to carry out diagnoses, interpretation, design, prediction and others useful activities to assist human experts. An expert system for air handling units has been developed by using Kappa-PC software. This can help technicians or engineers with a lack of knowledge and experience by providing them with the correct information and solution.
74 VOL 74 APRIL-JUNE 2018