[TRNSYS-users] Type 1245 in TRNSYS18

[Jeff Thornton]

<Just wondering why in the TESS solar library that the generic
concentrator using the Rabl approach and the XCPC collector use the same
source code i.e. type 1245.f90? Is the generic concentrator using an
evacuated tube as well? Hope someone can help> 

The Type1245 model is able to model many different types of collectors
from standard concentrators to XCPCs. As long as the collector
efficiency has been fit to the Rabl approach, Type1245 can be used. The
incidence angle modifiers will likely be somewhat different for these
types of collectors. 

As a side not - if you carefully look at the differences between the
flat plate collector and the evacuated tube collector in the libraries
you'll notice that the ONLY difference between them is the incidence
angle modifiers. Type 538 take 2-D IAMs and Type 539 takes 1D IAMs. A
flat plate collector could easily be modeled with the evacuated tube
source code as long as care was taken with the IAMs. It's no different
with Type 1245. 

Jeff 

---
Jeff Thornton
President - TESS LLC
3 N. Pinckney Street, Suite 202, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton at tess-inc.com

On 10/28/2020 9:40 am, David Redpath (Staff) via TRNSYS-users wrote: 

> Hi 
> 
> Just wondering why in the TESS solar library that the generic concentrator using the Rabl approach and the XCPC collector use the same source code i.e. type 1245.f90? Is the generic concentrator using an evacuated tube as well? Hope someone can help 
> 
> Thanks, 
> 
> David 
> 
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> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
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