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

[Ayoola Afolayan]

 Hello jeff,
                How can i correct it then assuming it is the weather data for larnaca that is bad. 

Thank You
Ayoola

> On 27 Sep 2013, at 23:02, Jeff Thornton <thornton at tess-inc.com> wrote:
> 
> <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.
>>> 
>>> 
>>> 
>>> 
>>> _______________________________________________
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>>> TRNSYS-users at cae.wisc.edu
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>> 
>> -- 
>> ***************************
>> 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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