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Re: [TRNSYS-users] Problem withType 194b PV panel efficiency



Santeri,
  I would recommend that you run the plugin for Type194 (click on the magic wand icon in the lower left corner of the parameters tab of the proforma). The plugin will take the parameters that you can get from the PV panel manufacturer and will give you back the various values that the Type requires. I would not recommend changing those parameters (a, IL, IO, series resistance, etc.) arbitrarily.

  I would also recommend that you run the PV without the inverter in order to make sure there isn't a mismatch between the two.
Kind regards,
 David



On 9/4/2012 09:48, Santeri Siren wrote:
Dear Trnsys users,

I am simulating a PV system in Finlands conditions using component 194b. My problem is that system efficiencies are pretty low (7...8% at summer time). By efficiency I mean produced power at maximum power point divided by the total radiation of the sun [W/m2/W/m2].

I can affect the efficiency by growing parameter number 20 (IL). If I grow this parameter, my efficiency also grows.  I checked the matematical reference, and it says that IL = photocurrent. However I have no Idea what kind of values should I give to this parameter. Does anyone know that should I chande the default value of this parameter to something else?


Here are the products I used for parameters:

PV panels: http://am.suntech-power.com/images/stories/pdf/datasheets/jun2012/STP240_Wde_Poly_35mmFrame.pdf

Inverter (sunnyboy 5000TL): http://www.sma-uk.com/en_UK/products/solar-inverters/sunny-boy/sunny-boy-3000tl-3600tl-4000tl-5000tl.html


Best regards,

Santeri Siren


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