[TRNSYS-users] Equation and Type 20

Tobias Tag tag.tobias at googlemail.com
Mon Jun 17 01:53:12 PDT 2013

Dear TRNSYS-User,

i have two problems with TRNSYS 17.

1. I´m trying to make the maximum heating rate of an element (of Type 60c)
depending on the power produced by PV in three steps. Shold look like that:

    If 1.5kW < PV-Power < 3kW  then heating rate = 1.5 kW

    else if 3kW < PV-Power < 4.5kW then heating rate = 3kW

    else if PV-Power > 4.5kW then heating rate = 4.5kW

I´ve set the heating rate as a String variable which shold get the value
from a equation. but i don´t know how to update the equation in every time
step of the simulation.

2. Does anybody know what the external files of type 20 (dual source heat
pump) are? Unfortunatly ther is no example in the TRNSYS-Examples folder.

Kind regards

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