[TRNSYS-users] Inaccurate result for the energy gained by the fluid in the collector

[Jeff Thornton]

<I am modelling a system for solar domestic hot water heating with
the following components: Pump (Type 3b), Controller (Type 2b),
Collector (Type 1b), Tank (Type 4c) with the weather component Type
109-TMY2 (Larnaca-Cyprus). After running the simulation, i try to
calculate the useful energy gain by the fluid in the collector monthly
on excel but the graph am getting seems not to be logical. I repeat the
same process but with a different weather data for 2 different cities,
Istanbul and Konya and the result/plot was better compare to the one i
got for Larnaca. Meanwhile, my case study is on Larnaca-Cyprus. Please i
need to know why am getting a poor result for Larnaca.> 

What doesn't
seem to be logical about the plot that you sent along? The shape of the
curve over the year? The collected energy for Larnaca comes up early in
the year, stays relatively constant, then drops back down at the end of
the year where the other two cities have more of a parabola shape.
However, if you look at the shape of the incident radiation plot you'll
see exactly the same behavior. Either the weather data is bad, or the
city in question has that solar pattern - which isn't all that unusual.


Jeff 

---

Jeff Thornton 

_President - TESS LLC_ 

_22 N. Carroll
Street, Madison WI USA 53703_ 

_Office: (608) 274-2577 Fax: (608)
278-1475_ 

_www.tess-inc.com_ 

_E-Mail: thornton at tess-inc.com_ 

On
09/27/2013 2:52 pm, David BRADLEY wrote: 

> Ayoola,
> Remember to
account for the amount of energy that has been stored in or removed from
the tank since the beginning of the simulation. If that does not solve
your problem then I would recommend sending your project and your
question to your distributor's technical support for assistance.
> Kind
regards,
> David
> 
> On 9/27/2013 05:09, afolayan ayoola wrote: 
> 
>>
Hello TRNSYS user, 
>> I am modelling a system for solar domestic hot
water heating with the following components: Pump (Type 3b), Controller
(Type 2b), Collector (Type 1b), Tank (Type 4c) with the weather
component Type 109-TMY2 (Larnaca-Cyprus). After running the simulation,
i try to calculate the useful energy gain by the fluid in the collector
monthly on excel but the graph am getting seems not to be logical. I
repeat the same process but with a different weather data for 2
different cities, Istanbul and Konya and the result/plot was better
compare to the one i got for Larnaca. Meanwhile, my case study is on
Larnaca-Cyprus. Please i need to know why am getting a poor result for
Larnaca. 
>> Please find attached copy of my graph for your referral.

>> Thank You 
>> Ayoola Afolayan 
>> Department of Mechanical
Engineering, 
>> Eastern Mediterranean University, North Cyprus. 
>> 
>>
_______________________________________________
>> TRNSYS-users mailing
list
>> TRNSYS-users at cae.wisc.edu
>>
https://mailman.cae.wisc.edu/listinfo/trnsys-users
> 
> -- 
>
***************************
> David BRADLEY
> Principal
> Thermal Energy
Systems Specialists, LLC
> 22 North Carroll Street - suite 370
>
Madison, WI 53703 USA
> 
> P:+1.608.274.2577
> F:+1.608.278.1475
>
d.bradley at tess-inc.com
> 
> http://www.tess-inc.com
>
http://www.trnsys.com
 
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