Hi there! I am facing the problem on how to model a district heating by using e+. Could I ask you which type of components do I have to use in Eplus launch? A simple case it would be ok- Thanks agian for the help!! Christian
Hi,
you have to connect your hot water loop to the District Heating object as hot water generator (Primary Supply Side), than to as many Fluid-to-fluid heat exchangers as you need on Primary Demand Side to model the heat exchanger substation at building level.
These Fluid-to-fluid heat exchangers will be on the Secondary Supply Side, than finally the you have to put the teminal units yuo need (radiators, fan coil units, AHU coils,....) to the Secondary Demand Side.
Obviously every loop (the Primary and the Nth Secondary) need to have their own pumps in order to move hot water flows and be properly controlled.
Ag
It is also possible to put the terminal units, radiators, coils, etc. on the primary demand side. You don't necessarily have to use water-to-water heat exchangers to "bridge" heat transfer from district heating/cooling to these types of HVAC components. Check out the EnergyPlus example file WindACAirtoAir.idf to see an example of one Hot Water Loop with district heating on the supply side and hot water baseboards on the demand side.
Asked: 2020-03-25 10:41:32 -0500
Seen: 715 times
Last updated: Mar 29 '20
I started to take a look at WindACAirtoAir.idf . Sometimes I get lost because there are several components. By the way, I cannot understand the component named Sizing zone. In such component are specified the supply air temperature for cooling 12 and heating 50 when the temperature setpoints in the schedule compact are different for both heating and cooling. Moreover, do you know a convenient way to make a skatch of the building envelope in some free cad program in order to import the drawing into WindACAirtoAir.idf file?
@chrisis this is really a different question and should be created as a new post. However, there is already a post that discusses the Sizing:Zone object, as well as another post that discusses tools to visualize and edit the geometry of EnergyPlus files. Please search existing posts on Unmet Hours to try and answer your question before adding a new post.
Thanks again Aaron and sorry for the mess