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Simulate Heat Pump for hydronic Radiant Floor and duct type indoor units

asked 2015-07-15 01:58:15 -0500

Esentis gravatar image

updated 2015-07-15 08:17:15 -0500

First of all,

this is my first post in this community. Congratulations for the great job did by all and each one of the members.

I have problems in simulating a HVAC system with a Samsung DVM S Heat Pump with two hydronic kits for a radiant floor heating and for a duct type indoor units cooling.

In HVAC Systems I introduce all thermal zones and one duct air terminal for each zone. I don't know how I can introduce one hydronic kit to simulate Air to water system for the radiant floor.

My model is a house of 500 m2 with two thermal zones. image description

Best regards,

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answered 2015-10-21 14:53:53 -0500

To model radiant floors in OpenStudio, you will need to go through the following steps:

  1. Create an 'Internal Source Construction' for the radiant floor assembly. You can do this in the 'Constructions' tab near the top on the left side of the OpenStudio interface. It should be noted that this internal source construction MUST contain at least three material layers, otherwise EnergyPlus will crash during the simulation.
  2. Assign the new internal source construction to the appropriate floor surface(s) of your model. The most direct way to do this is in the SketchUp plug-in, since you can see the surface. Setting the 'Construction Name' field of the surface will override the default construction set assignment for floor surfaces.
  3. In the 'Thermal Zones' tab of the OpenStudio interface, click on the 'Library' pull-down list at the right of the screen. You should see various radiant options near the middle (Low Temp Radiant Electric, Variable Flow, and Constant Flow). Drag the appropriate radiant object into the 'Zone Equipment' column of your zone(s) with radiant heating.
  4. Once created, click on the line with the name of your radiant object. You should see input fields appear at the right of the screen. Here, you can choose the 'Radiant Surface Type' to be "Floors". Be sure to also assign the appropriate hot water loop and chilled water loop that the radiant floor's heating and cooling coils are connected to, respectively. You can do this by clicking on the icons that look like connected chain links.

I tried to outline this process using the figures below. I hope this helps!

image description image description image description image description

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Asked: 2015-07-15 01:58:15 -0500

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Last updated: Oct 21 '15