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.
I want to model a building with 18 different zones that should be heated with radiators, using a single water to water heat pump. I am wondering if I have to define heating type in TRNBUILD or not. I used a diverting valve for distribution (Type647_v2a) and a mixing valve for collection ((Type649_v2a)) of the heating fluid
Furthermore, since the zones have large floor area, how can I model each zone with multiple radiators and not with a big radiator with a large emitter length?
Thanks
The HEATING type that is built into TRNBuild/Type56 is idealized so that you tell it what temperature should be maintained in the zone and Type56 will compute the amount of energy required to maintain that temperature. That kind of simulation is referred to as "energy rate control." If you want to model real radiators then you're moving into a kind of simulation called "temperature level control" where you will define a thermostat, a boiler, some piping, distribution and mixing valves as you have done but also some kind of emitter component. Which Type you choose to model the emitters will determine how they interact with Type56. In some cases the radiator model will want to connect to Type56 by means of a gain to the space. In other cases the emitter might connect to Type56 by means of a VENTILATION type defined in TRNBuild. A VENTILATION type just means that there is air entering the zone at a particular temperature, humidity, and flow rate; the source of the air is not relevant to the definition in the zone.
As a side note there is a radiator component in the TESS HVAC library.
kind regards,
David
DavidBradley 12/02/2024 5:00 pm
I forgot to mention that you can define as many gains and/or ventilations in the zone as you want. You can group all the emitters together or you can treat them individually.
David
