[TRNSYS-users] Load Splitter for supplying power to electrical load and electrolyser for H2 generatoin

[Tilak Sunwar]

Hi David,

Thank you for your email with a extremely valuable advise. I have gone
through the Master level Controller (105) and was wondering if it is ok to
keep the value of DEGS as ZERO because I am designing a complete renewable
energy system without DEGS.  One of my objective is to size a system so
that it can run throughout the year (I am planning to consider 10 days
autonomy of hydrogen storage). In that case, both PV and storage will be
sized large enough to supply power for round the year.

Thank you,
Tilak


On Tue, Apr 15, 2014 at 4:08 AM, David BRADLEY <d.bradley at tess-inc.com>wrote:

>  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:
>
> Hi David,
>
>  I am currently doing a Miner Thesis project as part of my Master course.
> I am designing a Solar PV-Thermal and Hydrogen system for heat and power. I
> am looking for a LOAD SPLITTER which should perform the following
> 1. First compare the PV power and the load demand at that particular hour.
> 2. If the load is less than or equal to PV power generated, than the
> supply the power to Load only.
> 3. If there is excess power from the PV, supply to electrolizer to
> generate hydrogen.
> 4. Hydrogen will be utilize when there is no solar radiation.
>
>  I would highly appreciate if you could provide me your guidance in the
> above area mentioned,
>
>  Looking forward to your kind response.
>
>  Thanks
> Tilak
> --
>
> "Wisdom you don’t get in colleges, schools, universities, nowhere. Where
> do you get it, the wisdom? You get it through your spirit, which gives you
> a complete idea as to what is right and what is wrong."
> H.H Shri Mataji Nirmala Devi, August 28,1994, Cabella, Italy
>
>
> --
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 22 North Carroll Street - suite 370
> Madison, WI  53703 USA
>
> P:+1.608.274.2577
> F:+1.608.278.1475d.bradley at tess-inc.com
> http://www.tess-inc.comhttp://www.trnsys.com
>
>


-- 

"Wisdom you don’t get in colleges, schools, universities, nowhere. Where do
you get it, the wisdom? You get it through your spirit, which gives you a
complete idea as to what is right and what is wrong."
H.H Shri Mataji Nirmala Devi, August 28,1994, Cabella, Italy
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