[TRNSYS-users] average ambient day temperature

[David BRADLEY]

Nick,
   Type55 would allow you to integrate only over a certain time period 
(your 8am to 4pm time frame) and reset daily. Alternatively, you can get 
a daily sum of a function that has a value of 1 when the sun is up and a 
value of 0 otherwise: sunUp = GT(Ih,0) (where Ih is an output of your 
weather processor). That will get you the number of daylight hours each 
day. You'll then need to print out your hourly temperatures and do the 
integration in Excel after the simulation.
Best,
  David


On 4/8/2011 16:50, Nicholas LaHam wrote:
> Jeff
>
> Is it possible to create running averages based on certain criteria? 
> For instance, could I calculate the average of the temperature each 
> day only when radiation is present (during daytime hours) so that the 
> average does not reflect the cold nights?
>
> The closest solution I have found to this is to use an 8 hour running 
> average, so that you are getting 3 averages each day: /Midnight to 
> 8am, 8am to 4pm, and 4pm to Midnight/. And then using Excel to average 
> only the 8am to 4pm data and erase everything else. The problem with 
> this is the radiation is still present after 8am or before 4pm at 
> certain locations and depending on the time of season.
>
> Thanks,
> Nick
>
> On Apr 8, 2011, at 12:44 PM, Jeff Thornton wrote:
>
>> You can also use the utility model that creates a running average - 
>> in your case a running 24 hour average.  This will keep you from 
>> getting step changes at midnight.
>>
>> Jeff
>>
>> Jeff Thornton
>> President - TESS, LLC
>>
>> 22 North Carroll Street - Suite 370
>> Madison WI 53703 USA
>>
>> Phone: 608-274-2577
>> Fax: 608-278-1475
>> E-mail: thornton at tess-inc.com <mailto:thornton at tess-inc.com>
>> Web: www.tess-inc.com <http://www.tess-inc.com>
>>
>>
>>
>> *----- Original Message -----*
>> *From:* "Adrien JEZEQUEL - ITF" <a.jezequel at itf.biz 
>> <mailto:a.jezequel at itf.biz>>
>> *Sent:* Thu, April 7, 2011 9:10
>> *Subject:* Re: [TRNSYS-users] average ambient day temperature
>>
>> Lana,
>>
>> I think you can also use Type55, from utility library.
>>
>> Best regards
>> ------------------------------------------------------------------------
>> !
>> <logo_itf_2010.jpg> <http://www.itf.biz/>
>> www.itf.biz <http://www.itf.biz/>
>>
>> 	Adrien JEZEQUEL
>> Simulations Thermiques Dynamiques
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>>
>> Le 07/04/2011 14:56, Arno Dentel a écrit :
>>>
>>> Lana,
>>>
>>> you can use Type127 to calculate an running mean value.
>>>
>>>
>>> Best regards,
>>>
>>> Arno
>>>
>>>
>>>
>>> *Von:*trnsys-users-bounces at cae.wisc.edu 
>>> [mailto:trnsys-users-bounces at cae.wisc.edu] *Im Auftrag von *Lana 
>>> Saracevic
>>> *Gesendet:* Donnerstag, 7. April 2011 10:04
>>> *An:* trnsys-users at cae.wisc.edu
>>> *Betreff:* [TRNSYS-users] average ambient day temperature
>>>
>>>
>>> Dear all,
>>>
>>> is there a Type that can calculate the average ambient day 
>>> temperature of each day in the year, and where can I find it? I 
>>> would like to use that to control the inlet temperature of a 
>>> concrete core activation system.
>>>
>>>
>>>
>>> Freundliche Grüße / Best Regards
>>>
>>>
>>> Lana Saracevic
>>>
>>>
>>> *________________________*
>>>
>>> <untitled1.2.3.gif>
>>>
>>>
>>> Bayer Technology Services GmbH
>>>
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>>>
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>>>
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>>>
>>> E-mail: _lana.saracevic at bayer.com_
>>>
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>>>
>>>
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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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