[TRNSYS-users] Previous value of equation

David BRADLEY via TRNSYS-users trnsys-users at lists.onebuilding.org
Mon Jul 17 07:44:53 PDT 2017


Ismail,

   If you have the TESS Controls library you can use Type660. If you do 
not then you can use Type93 in the standard library.

kind regards,

  David



On 07/17/2017 08:44, Ismail OUHALLOU via TRNSYS-users wrote:
> Dear Tnsys users,
>
> I would like to know how to insert the previous value in an equation 
> depending on time. For example to program the following equation : 
> */RH(i) = RH(i-1) * Constant/*; where RH is Relative Humidity of a 
> zone. How to program the RH(i-1) in the equation block ?
>
> Thanks in advance.
> Best,
> Ismail
>
>
> -- 
> /************************************************/
> /Ismail OUHALLOU/
> Green building & Sustainability consultant
>
> *Morocco*
> P:+212**620**548**116
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> i.ouhallou at trusted-energy.com <mailto:i.ouhallou at trusted-energy.com>
> issmail.ouhallou at gmail.com <mailto:issmail.ouhallou at gmail.com>
>
>
>
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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
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d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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