<div dir="ltr">Hi David,<div><br></div><div>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. </div>
<div><br></div><div>Thank you,</div><div>Tilak</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Apr 15, 2014 at 4:08 AM, David BRADLEY <span dir="ltr"><<a href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Tilak,<br>
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.<br>
<br>
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.<br>
Kind regards,<br>
David<div><div class="h5"><br>
<br>
<br>
<div>On 4/12/2014 17:29, Tilak Sunwar wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi David,
<div><br>
</div>
<div>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 </div>
<div>1. First compare the PV power and the load demand at that
particular hour.</div>
<div>2. If the load is less than or equal to PV power generated,
than the supply the power to Load only.</div>
<div>3. If there is excess power from the PV, supply to
electrolizer to generate hydrogen.</div>
<div>4. Hydrogen will be utilize when there is no solar
radiation.</div>
<div><br>
</div>
<div>I would highly appreciate if you could provide me your
guidance in the above area mentioned,</div>
<div><br>
</div>
<div>Looking forward to your kind response.</div>
<div><br>
</div>
<div>Thanks</div>
<div>Tilak<br>
-- <br>
<div dir="ltr">
<div> </div>
<div><span>"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."</span><br>
<span>H.H
Shri Mataji Nirmala Devi, </span><span>August
28,1994, Cabella, Italy</span><br>
<br>
</div>
</div>
</div>
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<br>
</div></div><pre cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><div><font color="#333399" style="background-color:rgb(255,255,255)"></font> </div><div><span style="color:rgb(51,51,51);font-family:'lucida grande',tahoma,verdana,arial,sans-serif;line-height:17px">"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."</span><br style="color:rgb(51,51,51);font-family:'lucida grande',tahoma,verdana,arial,sans-serif;line-height:17px">
<span style="color:rgb(51,51,51);font-family:'lucida grande',tahoma,verdana,arial,sans-serif;line-height:17px">H.H Shri Mataji Nirmala Devi, </span><span style="color:rgb(51,51,51);font-family:'lucida grande',tahoma,verdana,arial,sans-serif;line-height:17px">August 28,1994, Cabella, Italy</span><br style="color:rgb(51,51,51);font-family:'lucida grande',tahoma,verdana,arial,sans-serif;line-height:17px">
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