Kindly advise on appropriate tags for the "SA Tempering Setpoint" in the Unit Ventilator. Would it be more accurate to use "discharge", "air" tags, or should we opt for "inlet", "air" instead?
SA Tempering Process in Unit Ventilators (UV): SA Tempering refers to the pre-heating of incoming air in a unit ventilator system before it enters the occupied zone—particularly essential during cold weather conditions. The goal is to minimize cold drafts and enhance thermal comfort, especially when large volumes of outdoor air are introduced for ventilation during winter.
Given that this process involves pre-heating outside air, the air is technically conditioned before it becomes supply air. Although the term used is "Supply Air Tempering", it raises a question of accuracy in tagging.
Would "discharge" tags be appropriate here, or should we consider using "outside", "mixed", or "inlet" tags to better reflect the actual point in the air handling sequence?
Mike MelilloWed 30 Jul
I'm not quite sure the ordering of your equipment from your description, I think it's just my misreading.
I would order the entities (and their tag sets) something like below, assuming this is a single stream unit taking in only outside air, no mixing, one coil, and discharge to zone:
id: @uv
equip
unitVent
---
id:@oat (initial stream of incoming air, technically yes this is also inlet, but outside is more descriptive imho)
equipRef: @uv
point,his
outside,air,temp,sensor
---
id:@phv
equipRef: @uv
point,his
preheat,valve,cmd (water || steam)
---
id:@dat (conditioned air, still in the unitVent or in the ductwork downstream before any other entity)
equipRef:@uv
point,his
discharge,air,temp,sensor
---
id:@znt (no longer in the equipment air stream)
equipRef: @uv
point,his
zone,air,temp,sensor
I typically use inlet,air,temp,sensor for VAV boxes to denote the air coming from the upstream AHU. That said, it's not usually a case I face, because we map vav -> airRef.points -> {discharge,air,temp,sensor} rather than create that inlet point on every vav.
Jayesh Shirsath Thu 24 Jul
Kindly advise on appropriate tags for the "SA Tempering Setpoint" in the Unit Ventilator. Would it be more accurate to use "discharge", "air" tags, or should we opt for "inlet", "air" instead?
SA Tempering Process in Unit Ventilators (UV): SA Tempering refers to the pre-heating of incoming air in a unit ventilator system before it enters the occupied zone—particularly essential during cold weather conditions. The goal is to minimize cold drafts and enhance thermal comfort, especially when large volumes of outdoor air are introduced for ventilation during winter.
Given that this process involves pre-heating outside air, the air is technically conditioned before it becomes supply air. Although the term used is "Supply Air Tempering", it raises a question of accuracy in tagging.
Would "discharge" tags be appropriate here, or should we consider using "outside", "mixed", or "inlet" tags to better reflect the actual point in the air handling sequence?
Mike Melillo Wed 30 Jul
I'm not quite sure the ordering of your equipment from your description, I think it's just my misreading.
I would order the entities (and their tag sets) something like below, assuming this is a single stream unit taking in only outside air, no mixing, one coil, and discharge to zone:
I typically use
inlet,air,temp,sensorfor VAV boxes to denote the air coming from the upstream AHU. That said, it's not usually a case I face, because we mapvav -> airRef.points -> {discharge,air,temp,sensor}rather than create that inlet point on every vav.