[TRNSYS-users] trnsys18: useful energy gain problem

[Jeff Thornton]

SARA, 

The slope typically maximizes incident solar radiation, and hence useful
energy gain, at a setting somewhat near the latitude. For your location,
simply set up and run a parametric table and integrate the useful energy
gain over the year. That'll show you what is best for that climate and
the characteristics of your load. The evacuated tube collector can show
negative values during periods of low (or no) solar radiation or periods
of high inlet temperatures. But during typical operation, the value is
positive - or you wouldn't ever install these devices to collect
energy... 

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 03/01/2021 11:59 am, Sara EL HASSANI via TRNSYS-users wrote: 

> -- 
> 
> Dear sir 
> 
> I am using Trnsys 18; however, I want to know the effect of the slope collector on the useful energy. The problem is that the useful energy gain of ETC(type71) gives negative values. 
> 
> Regards 
>   SARA 
>   
>   
>   
> EL HASSANI SARA | PH.D. Student 
> 
> Mechanical & Energetics Laboratory 
> Mohammed First University 
> Oujda, MOROCCO. 
>                      _PHONE__:_ +212(6)28240316
> 
> _                     E-MAIL: __SARAELHASSANI7 at GMAIL.COM_ 
> 
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> TRNSYS-users at lists.onebuilding.org
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