Cooling energy calibration

asked 2018-05-10 15:47:16 -0500

hirav_joshi22
31 ●1

updated 2018-05-15 07:33:39 -0500

__AmirRoth__

4436 ●5 ●17 http://bleedinggreenna...

Hi, I am a new OpenStudio user and using the software to model existing school building in California. During calibration, after adjusting all schedules, including fan coil ON - OFF schedules, I am still seeing excessive cooling energy in the model. I am not sure if there is any way to shut off the plant during summer months.

The current systems are fan coil system with air cooled chiller and fuel oil boiler. I am uploading the model and weather file if someone can review and suggested any remedy for cooling calibration.

answered 2018-05-15 02:48:00 -0500

Julien Marrec

29032 ●85 ●74 http://www.effibem.com/

updated 2018-05-15 02:49:26 -0500

To shut down a PlantLoop, you can use an AvailabilityManager.

In PR#2964 (there is a GIF showing the new behavior on that PR too if you're curious), I added a new "PlantLoop Control" tab in OpenStudio App that allows you to assign availability managers to a PlantLoop. You can select your PlantLoop, and drag the appropriate AvailabilityManager you want, and then modify its parameters after clicking on it.

In this example, I want to turn off my Hot Water Loop from May to September (summer). I select my Hot Water Loop, go to the control tab, and drag from the Library an AvailabilityManager:ScheduledOff:

Drag AVM

Then you can create a schedule with values of 0 from May to June (=ForceOff), and 1 the rest of the time (=NoAction), setting the Winter Design day to 1 and the summer design day to 0 for proper sizing, and assign that to the AvailabilityManager:ScheduledOff you have dragged (click on it to see it in the right tab)

Assign schedule