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

To: trnsys käyttäjät <trnsys-users@cae.wisc.edu>
Subject: [TRNSYS-users] Problem withType 194b PV panel efficiency
From: Santeri Siren <santeri.siren1@gmail.com>
Date: Tue, 4 Sep 2012 17:48:19 +0300
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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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