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Re: [TRNSYS-users] TRNSYS counter function


Hi,

not sure if I understood right, but I think I use the input value recall for essentially the same problem: pass the condition (heat and ambient temperature under your limit) to type 93 as a 0/1, and sum the outcome of the number of time steps necessary to reach "a certain time". If the sum is equal to the required value, trigger the defrost condition. Hope it helps, regards

Angel

2016-11-13 4:17 GMT+01:00 via TRNSYS-users <trnsys-users@lists.onebuilding.org>:
Hello everyone,

I am trying to figure out a way to model a defrost timer on as air source heat pump. To do so, I would have to set up a counter that would activate a defrost cycle (force heat pump into cooling mode) after the heat pump has been working in heat mode and the outside temperature is below a certain limit for a certain amount of time.

I have tried using Type 1233, but this component does not wait before triggering the output, it rather starts right away when the conditions are met, then is stuck in OFF position for a certain amount of time.

Any help with this issue would be appreciated.

Thanks!

Olivier Quevillon

Étudiant à la maîtrise en Génie Mécanique
École de Technologie Supérieure

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Àngel Carrera Martín
Consultor sènior en Sistemes
Llicenciat en ciencies físiques
Sistemes Avançats d'Energia Solar Tèrmica - AIGUASOL

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