Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
2

Packaged Terminal AC (PTAC) Units

asked 2019-09-11 16:54:31 -0500

rbergepri gravatar image

updated 2019-09-12 07:35:13 -0500

I want to model an apartment complex with PTACs that supply hotel style heating and cooling. Some apartments will have both 3/4 and 1 ton PTACs in the same apartment, but servicing different rooms. I have two questions:

  1. Is BEopt capable of modeling a PTAC, and if so, which category under "Space Conditioning" would it fall in?
  2. Is BEopt capable of having different sizes of PTACs in the same modeling run?
edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
1

answered 2019-09-12 08:10:55 -0500

  1. If the PTAC uses a heat pump for heating, use BEopt's Mini-Split Heat Pump category. Otherwise, use BEopt's Room Air Conditioner category (in combination with Electric Baseboard if the PTAC uses strip heat).
  2. If you ask BEopt to autosize HVAC, it will calculate different sizes for each apartment. But if you hardsize the equipment, only a single size can be specified for all apartments. One option is to do two runs, 1 with 3/4 ton and 1 with 1 ton, and then combine outputs for the two runs by looking at unit-specific outputs. There is a dropdown on the output screen where you can see outputs on a unit-by-unit basis instead of the entire building.
edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

 



Question Tools

Stats

Asked: 2019-09-11 16:54:31 -0500

Seen: 45 times

Last updated: Sep 12