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Tilak, If the comparisons are simple then you may be able to use equations in the input file to determine how much power needs to go to meet the load or run the electrolyzer. If they get more complex then there are some master controller components available in the Hydrogen Systems directory (look first at Type105). Bear in mind that these are quite generic controllers. In all of the cases that I have had to deal with, I needed to write my own controller model using a Fortran compiler because there were some special requirements on the controls (for example what do you do if the load cannot be met by PV and the state of charge in the hydrogen tank is so low that you cannot run the fuel cell either. Also as a side note, keep in mind that electrolyzers have a fairly significant standby power requirement. This would be some power that they draw when idle so that when excess electricity becomes available, the hydrogen produced is pure enough to be useful. There are also systems in which the electrolyzer is shut down (instead of allowed to idle) but in these cases the hydrogen that they produce while being started up is not useful. This is another reason why you might need to write your own master controller component. Kind regards, David On 4/12/2014 17:29, Tilak Sunwar wrote:
-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |