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.
- Before posting a topic or question search the existing topics (and the TRNSYS Users listserv archive or Post archive) to see if a similar topic or question has already been answered.
- 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.
- Remember when people help you, they are doing you a favor. Be patient, help people out by posting good descriptions of what you need help with, and be polite even if a response does not solve your issue.
- Moderators may edit your post for clarity or move your topic to a more appropriate category.
Last seen: Feb 21, 2025
@Manaya_ Your English is excellent! Please accept my apologies for the delay in responding to your follow up. I believe that the active layer mode...
@ken I believe that equation 4.9.2-5 applies to the collector inlet and outlet pipes whereas the other equation applies to the pipes and risers tha...
@ken It may be worth noting that sometimes the limits that are placed on proformas are there because of limitations in the code. For instance, Type45...
@ken, Changes that you make to the proformas are not automatically reflected in projects that use those proformas. Think of the proforma as a template...
@ken, I think that you would have to modify the source code in order to do that. Does the collector you are modeling have a load side heat exchanger? ...
@baumstrunk Damian, if the LOOP command is not functioning in v18 it is a bug and not something intentional. That said, Type22 has the concept o...
Type56 takes latent gains in kg/h of water so as an absolute humidity gain. As a side note, there is an evapotranspiration model included in the lat...
Just to close the loop on this question; the SketchUp building model had a number of incorrectly assigned constructions, and some airnodes that were n...
Farah, the function ABS() returns the absolute value of whatever is inside the parenthesis. You can try: myVariable = 100*SIN(TIME*4) myOtherVar...
@sescuder and @A_Weiss This is definitely a bug in the v18 libraries. We'll get a fix released with the next update. The three possible workarounds ar...
@manaya_ >> Even if the flow rate is sufficient, is it ok to divide the active layer in case the flow rate is very low? You'll need to seg...
Wirich, This is an error that will need to be investigated by a developer. Can you please send the project, *.b18 and any other files needed in o...
@a_weiss and @charles_bo just to close the loop on this, there is a bug in v18.05.0001. It will be fixed in the next release.
@tm-abir-ahsan you bring up a good point! This is one on which I want to check with some colleagues before answering. Please stand by!
@manaya_ It would probably be helpful to refer to the 05-MultizoneBuilding manual for context about the capabilities and limitations of the active ...