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How to define a single cooling or heating setpoint in Openstudio?

asked 9 years ago

oat's avatar

updated 9 years ago

I noticed that only dual setpoint is available for "ThermostatSetpoint" in the Inspector in OpenStudio plugin for Sketchup.

So, how to define a single cooling/heating setpoint in Openstudio?

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See this post, I think it will answer your question.

David Goldwasser's avatar David Goldwasser  ( 9 years ago )

noted with many thanks, David!

So, a dual setpoint thermostat is required by default in OpenStudio even if the heating setpoint will not be used at all, right?

oat's avatar oat  ( 9 years ago )

Correct. There may be a time when we support additional thermostat types, but for now we just support dual setpoint.

David Goldwasser's avatar David Goldwasser  ( 9 years ago )

I feel like this is an important enough question that it warrants having an answer so I'm reopening it. I just came across this thread after running into problems of my own.

Julien Marrec's avatar Julien Marrec  ( 9 years ago )

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answered 9 years ago

updated 6 years ago

OpenStudio only supports ThermostatSetpoint:DualSetpoint. It does NOT support neitherThermostatSetpoint:SingleHeating nor ThermostatSetpoint:SingleCooling.

While it could be checking on forward translation to create a proper object, it just deletes the Thermostat altogether!

So if you have a heated-only zone you MUST input a cooling schedule as well: pick a high number, like 120°F/50°C.

If you have a cooled-only zone, you MUST input a heating schedule as well: pick a low number, like 32°F/0°C.


Edit 2018-04

I added this functionality circa October 2017: see PR #2813. The ThermostatSetpointDualSetpoint in OpenStudio now behaves like this during the Forward translation:

  • If only a Heating Schedule is specified, IDF has a ThermostatSetpoint:SingleHeating
  • If only a Cooling Schedule is specified, IDF has a ThermostatSetpoint:SingleCooling
  • If both Schedules are specified, IDF has a ThermostatSetpoint:DualSetpoint

Any version after 2.3.1 included will have this feature.

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As it's the year 2018, does OpenStudio of latest version support 'single cooling set point' now?

finorths's avatar finorths  ( 6 years ago )

@finorths: yes, see my edit of the answer in response to your comment.

Julien Marrec's avatar Julien Marrec  ( 6 years ago )

Hi Julien, does OpenStudio support ThermostatSetpoint:SingleHeatingOrCooling? Thanks.

Elvis's avatar Elvis  ( 1 year ago )

Just saw your post on GitHub. You omitted ThermostatSetpoint:SingleHeatingOrCooling in OpenStudio. Any plan to include it? Thank you.

Elvis's avatar Elvis  ( 1 year ago )

Not planned, no one has requested it in the past 10 years, and I don't have a good use case for it. But you can always open a feature request https://github.com/NREL/OpenStudio/is.... Try to explain carefully why you need the object, to make a case for it.

Julien Marrec's avatar Julien Marrec  ( 1 year ago )

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Asked: 9 years ago

Seen: 1,428 times

Last updated: Apr 25 '18