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How to set the thermostat temperature of a zone according to the PMV range of -0,5 and 0,5?

asked 2015-03-03 07:23:37 -0600

hugopft's avatar

updated 2015-03-03 07:24:11 -0600


In order to Achieve such goal , I use to set the HVAC system and thermostat the temperature to 23 ° C. So , I run the simulation and in the end I plot the graph for each PMV Evaluated zone And Then , I simply check if the PMV is lower than 0.5 and greater than -0.5 . If it did not happen , I change the set point temperature of the thermostat According to the PMV values ​​shown in graph Until the PMV value lies between the range of 0.5 to 0.5 . I was checking at Energyplus references and I saw two topics that I judge que be important in order to have as an output the ideal temperature to set my system, based on the PMV analysis : " Zone Control : Thermostat : Thermalconfort " and " ThermostatSetpoint : ThermalConforft : Fanger : DualSetpoint " . The problem is: I do not know how to apply them in my model and not need checking zone by zone and also having to change the the thermostat temperature when the PMV of the zone is out of the limits of the acceptable range ( between - 0.5 and 0.5).

Thanks guys.

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answered 2015-03-03 09:07:15 -0600

Archmage's avatar

In EnergyPlus, the change is made by replacing the ZoneControl:Thermostat objects with ZoneControl:Thermostat:ThermalComfort objects, which will in turn reference a ThermostatSetpoint:ThermalComfort:DualSetpoint and some schedules. The setpoint schedules have PMV values.

It is a pretty slick control feature and a lot easier than adjusting temperature thermostats. But if the radiative scene is not comfortable (e.g. large cold or hot window surfaces) then the resulting drybulb temperatures can get a little wild.

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@Archemage, what does this mean "getting wild"??? How can I check if Thermostat is working well?

Xandrika's avatar Xandrika  ( 2015-10-20 07:47:02 -0600 )edit

I mean the that the drybulb temperature values computed by the controller for the thermostat can get far outside the usual range one might expect. It is just something interesting to be aware of when using this control. You can monitor the output variables for PMV, zone air temperature, thermostats etc. to see how it is working.

Archmage's avatar Archmage  ( 2015-10-20 09:19:57 -0600 )edit

For folks with similar questions, see the IDF language in this other post:

The meters mentioned above are: Output:Variable,,Zone Thermal Comfort Fanger Model PMV,hourly; Output:Variable,,Zone Air Temperature,hourly; Output:Variable,,Zone Thermostat Heating Setpoint Temperature,hourly; Output:Variable,,Zone Thermostat Cooling Setpoint Temperature,hourly;

EBEdwards's avatar EBEdwards  ( 2020-07-30 08:41:44 -0600 )edit

answered 2015-03-03 07:59:30 -0600

OpenStudio does not support the thermal comfort family of thermostats at this time. You might consider an EnergyPlus Measure to programmatically add the thermostat.

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Asked: 2015-03-03 07:23:37 -0600

Seen: 972 times

Last updated: Mar 03 '15