<div dir="ltr">Hello everybody;<br><div><br>I am looking for an unglazed collector type, within i can enter parameters of the standard EN 12975-2 : bu, b1, b2 (respectively collector efficiency coefficient (m-1s), heat loss coefficient (Wm-2K-1) and collector efficiency coefficient (Wsm-3K-1)).<br>
<br>I found the types 553 and 559 but i can't find the documentation, apparently the model relies on algorithms supplied by the solar collector text: "Solar Engineering of Thermal Processes by Duffie and Beckman".<br>
<br>Where can I find this document? and what's the difference between type 553 and 559 ?<br><br>Thanks in advance for any information/advice;<br>
<br><br> Rajaa.<br>
</div></div>