Re: [TRNSYS-users] signal-depending summing unit?

["Arie Kalkman" <a.kalkman@chri.nl>]

Hi Jochen,

Maybe something like this approach might work:

- determine the total on-time using Type24: integrator
- every timestep, determine whether the chiller just switched on using Type
93: input value recall  (if [control value at T=n minus value at T=n-1]
equals 1, the chiller just switched on) 
- determine the number of starts by integrating the number of on-switches
(Type93 > Type24)
- divide the total on-time by the number of starts

I hope this answers your question.

Regards, Arie



-----Oorspronkelijk bericht-----
Van: trnsys-users-bounces@engr.wisc.edu
[mailto:trnsys-users-bounces@engr.wisc.edu] Namens Jochen Doell
Verzonden: dinsdag 23 januari 2007 11:22
Aan: trnsys-users@engr.wisc.edu
Onderwerp: [TRNSYS-users] signal-depending summing unit?

Hello,

I have a maybe quite simple problem.
I want to investigate the operating behaviour of an absorption chiller.
In my deck i have a controller which gives me 0 or 1 as a function which 
controls this chiller. Now i want to know the mean-operating-period, 
that means if the machine starts running, how many timesteps does it 
continue until it stops (on the average).
What i need is something like a "signal-depending summing unit". Ideas?

Thanks in advance,
Jochen

-- 
__________________________________________________
Jochen Döll / Diplomand

Dept. Thermally Active Materials and Solar Cooling

Fraunhofer-Institut für Solare Energiesysteme
Heidenhofstrasse 2, 79110 Freiburg, Germany

+49 (761) 4588 5456
jochen.doell@ise.fraunhofer.de
www.ise.fhg.de

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