[TRNSYS-users] Heat exchanger UA value

[Mayank Khichar]

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Please, help.

Mayank

On Sat, Mar 28, 2015 at 4:51 AM, Martin Berov <martber88 at gmail.com> wrote:

> Dear David,
>
> Thank you for the suggestion. I'll use Type 534 - coiled, but can you
> suggest me which are usually used values for the "geometry factor for
> natural convection" and "geometry exponent for natural convection".
>
> Best Regards
> Martin
>
> On Fri, Mar 27, 2015 at 10:45 PM, David BRADLEY <d.bradley at tess-inc.com>
> wrote:
>
>>  Martin,
>>   I would highly recommend that if at all possible you use Type534 from
>> the TESS Storage Tank library in place of Type60. Type534 has an internal
>> heat exchanger model that is far more robust than the one built in to
>> Type60.
>> Kind regards,
>>  David
>>
>>
>>
>> On 3/27/2015 3:11 PM, Martin Berov wrote:
>>
>> Dear TRNSYS users,
>>
>>  I'm trying to analyse the influence of the heat exchanger  area on the
>> solar fraction and collector efficiency.
>>
>>  I'm using storage tank Type 60c  with internal HX. Although I change
>> the area and the length(keeping the outside diameter constant) I always get
>> same results for the monthly solar fraction and efficiency - like there is
>> no influence.
>>
>>  What could be the reason for this?
>>
>>  Best regards
>> Martin
>>
>>
>> _______________________________________________
>> TRNSYS-users mailing listTRNSYS-users at lists.onebuilding.orghttp://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>>
>>
>> --
>> ***************************
>> David BRADLEY
>> Principal
>> Thermal Energy Systems Specialists, LLC
>> 22 North Carroll Street - suite 370
>> Madison, WI  53703 USA
>>
>> P:+1.608.274.2577
>> F:+1.608.278.1475d.bradley at tess-inc.com
>> http://www.tess-inc.comhttp://www.trnsys.com
>>
>>
>
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