Every coal has different of properties and while the coal delivery has change, it would be make boiler combustion change too.
It needs calculation special logic diagram to monitor how much coal heating value that is burning and the calculation result of heating value is using for input data of air and coal fuel consumption.
The simplified of the logic can be express as power plant basic control. For example if the boiler is controlling the load and the turbine control valve is controlling the main steam pressure, while the coal delivery is changing from higher heating value to the lower one, the main steam pressure will decrease a little bit.
To compensate the decreasing of main steam pressure, the boiler need coal combustion more to maintain stable the load. For this reason that logic got name "energy per unit mass compensation".
Let's consider picture below that Boiler Master is setting from Unit Control and feedback signal from generator load. Also on Turbine Control is setting from unit control and feedback signal from main steam pressure. This logic control assume coal heating value 24,697 kJ/kg.
Four pictures below are breakdown from Boiler Master that got change of coal heating value.
Next calculation http://anto-hendarto.blogspot.com/2009/01/coal-calculation.html
Excellent review!
ReplyDeleteSomeone essentially assist to make seriously posts I'd state. That is the very first time I frequented your web page and thus far? I amazed with the research you made to create this particular post extraordinary. Great job!
ReplyDeleteHere is my web site ... best diet
I couldn't refrain from commenting. Well written!
ReplyDeleteLook into my homepage - Dior Scarf
great, I like it.. keep post
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteTo keep a check on the hefty spike in your energy bills, you should hire a professional who provides services of boiler replacement in London.
ReplyDeleteThe simplified of the logic can be express as power plant basic control. For example if the boiler is controlling the load and the turbine control valve is controlling the main steam pressure, while the coal delivery is changing from higher heating value to the lower one, the main steam pressure will decrease a little bit. Power Plant Optimisation
ReplyDelete