Welcome to the TRNSYS Users Forum.

The forum is a place where people can interact and have discussions about different topics involving the use of the TRNSYS software package. Here you can post topics for discussion or questions on using TRNSYS and get advice from other users or TRNSYS experts. This forum is not intended for detailed technical support. Users should contact their distributor’s hotline for such assistance.

Some tips for success on using the forum:

  • Follow the Forum Rules posted in Forum Administration.
  • There are categories for different types of topics and questions. Post your topic or question into the proper category.
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  • Use a descriptive topic name. Don’t use attention getting subjects, they don’t get attention and only annoy people.
  • State the version of TRNSYS and which add-ons your are using.
  • Include enough specific details for your topic of question to be answered. Just posting “Why am I getting an error?” without describing the specific error and what you are trying to do when you get the error will not receive a response that fixes your issue.
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DavidBradley
@davidbradley
Admin
Member
Joined: Jan 20, 2023
Last seen: May 10, 2024
Topics: 29 / Replies: 125
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Answer to: Discharge power

@mrquack The output power (the power drawn from the battery) is an input to the model so it is not included among the model's outputs. A positive val...

2 days ago
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Answer to: Solar storage tank with two immersed heat exchangers_Type?

I think in both cases (534 and 1534) there are also "data file/plugin" versions of the proformas that allow you define multiple heat exchangers using ...

5 days ago
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Answer to: Solar storage tank with two immersed heat exchangers_Type?

@manuel_ines If you have the TESS Storage Tank library v18 you can use Type1534. If you have v17 of the libraries you can use Type534. Both can accomm...

6 days ago
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Answer to: Energy gain from lights

@shamsoddinghiami Shams, I realize this doesn't answer your question very directly. However, I find the lighting controls that are built into TRNBu...

7 days ago
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Answer to: Linking Matlab to TRNSYS while having installed two Matlab versions

@parispasq The reason that Matlab2024 is not working may be that the version of the Type155.dll file located in your .\TrnsysXX\Exe\ directory has t...

2 weeks ago
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Answer to: Problem with heat capacity when modeling apartment in multi-family house

@jolind You could treat the intermediate floor structure above as a thermal resistance rather than as a thermally massive structure. Another thing I w...

1 month ago
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Answer to: Always timestep 1hr for active layers?

@jolind I think what you are seeing is the building's time base, which is a bit like a time step. Type56 uses something called the conduction transfer...

1 month ago
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RE: 2-Pipe Variable Refrigerant Flow model

@oumaima The new Type (Type1254) includes a documented example. I would not really call the example a tutorial because while the documentation explain...

1 month ago
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Answer to: Inital temperature in active layer

@jolind There is unfortunately not a way to set the initial value of an active layer and yes, the initial active layer temperature output does display...

1 month ago
Topic
Replies: 3
Views: 107
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RE: How to store and array

@franzdra the SAVE attribute will maintain values from call to call of the subroutine but if you have two instances of the same Type in your simulatio...

1 month ago
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RE: How to store and array

@franzdra That is totally normal. There are many components that have to iterate internally during each of TRNSYS's iterations.

1 month ago
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RE: How to store and array

@franzdra to add on to @a_weiss's excellent and (as ever) thorough answer, the idea of the static array storage in v18 is that it provides a place to ...

1 month ago
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Answer to: Problem while modeling heating floor type 56

@sv2541 It could have something to do with the timebase. Type56 uses something called the Conduction Transfer Function method to represent energy tran...

1 month ago
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