Re: [TRNSYS-users] Storage tank - input inconsistency when 10min interval

To: Michał Klimas <michal.klimas@put.poznan.pl>

Subject: Re: [TRNSYS-users] Storage tank - input inconsistency when 10min interval

From: David BRADLEY <d.bradley@tess-inc.com>

Date: Fri, 21 Sep 2012 10:50:06 -0500

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Michal,
There may not really be a problem here. TRNSYS outputs are averages over each timestep and inputs are assumed to be constant over a timestep. As a result the inputs to Type534 are assumed to be the average flow rate over your 10 minute period. Type9 also gives you various options for what kind of data you are giving it (averages over the timestep, instantaneous values at the end of the timestep, etc.). If you have integrated flows over the 10 minute periods, you can use an equation to back out what the average flow rate was over the period.
Kind regards,
David

On 9/19/2012 09:26, Michał Klimas wrote:

Dear All,

I’m trying to simulate water flow through storage tank ( type 534). I’ve got real measurements of water temp. and flow with 10min interval (using type 9e) but units of tank inputs can only be kg/s or kg/h and so on.

My simulation TIMESTEP must be 10 min (1/6 as an equation) so I cannot interpolate any data.

Do you have any idea how to solve this problem ?

best regards

Michal Klimas
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