No.
I have a reasonable grasp of the basics (at least I think thatâ??s true). I do not have a good grasp of how SetPointManagers interact and particularly have little ? no experience using a pre-cooling coil and making it â??play nicelyâ?? with the other coils.
The Building Performance Team
James V. Dirkes II, P.E., BEMP , LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Richard Raustad
Sent: Monday, May 21, 2012 12:11 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Setpoint Managers are driving me crazy!
Does this help?
Controller:WaterCoil,
\min-fields 9
A1 , \field Name
\type alpha
\required-field
\reference AirLoopControllers
A2 , \field Control Variable
\type choice
\key Temperature
\key HumidityRatio
\key TemperatureAndHumidityRatio
\note keys HumidityRatio or TemperatureAndHumidityRatio
\note requires a ZoneControl:Humidistat object along
\note with SetpointManager:SingleZone:Humidity:Maximum,
\note SetpointManager:MultiZone:MaximumHumidity:Average,
or
\note SetpointManager:Multizone:Humidity:Maximum object
On 5/21/2012 11:55 AM, Jim Dirkes wrote:
Dear forum,
Apologies in advance for a messy question?..
Below is a schematic of an air loop.
· Note that there is a pre-cooling coil upstream of the Mixing Box.
· Also note that all of the numbers (e.g., 1200, 1204, etc.) are â??shorthandâ?? for a node name.
I want the pre-cooling coil to operate solely as a dehumidification device to maintain a specific humidity ratio. Everything else should operate in a fairly typical fashion for heating and cooling control, except that there is no economizer.
I show below the SetPointManagers and related mixed air NodeList that I am using with no success for dehumidification. Can you offer a suggestions to make this work?
Thanks!
|
|
SetpointManager:MixedAir |
|
Name |
SPMgr_MixAir_AHU-1 |
|
Control variable: |
Temperature |
|
reference set point node name |
1210 (Node name equivalent) |
|
fan inlet node name |
1208 |
|
fan outlet node name |
1210 |
|
Name of the set point Node or Node List |
MANodeLIST_AHU-1 |
|
|
|
|
|
SetPointManager:Warmest |
|
Name |
SPMgr_DischAir_AHU-1-warmest |
|
Control Variable |
Temperature |
|
HVAC Air Loop Name |
AirLoop_AHU-1 |
|
Minimum Setpoint Temperature |
12.8 |
|
Maximum Setpoint Temperature |
26.7 |
|
Strategy |
MaximumTemperature |
|
Setpoint Node or NodeList Name |
1210 |
|
|
|
|
|
SetpointManager:SingleZone:Humidity:Maximum |
|
Name |
SPMgr_ZoneRH_AHU-1 |
|
Control Variable |
MT |
|
Schedule Name |
MT |
|
Setpoint Node or NodeList Name |
1210 |
|
Control Zone Air Node Name |
Node_MainStore |
|
|
|
|
|
SetPointManager:Scheduled |
|
Name |
SPMgr_Sched_AHU-1 |
|
Control Variable |
Temperature |
|
Schedule Name |
SchCpct_Always70F |
|
Setpoint Node or NodeList Name |
1204.5 Ã? E+ complains if I donâ??t have a temperature setpoint for the pre-cooling coil |
|
|
|
|
|
SetPointManager:OutdoorAirPretreat |
|
Name |
SPMgr_OAdehum_AHU-1 |
|
Control Variable |
MaximumHumidityRatio |
|
Minimum Setpoint Temperature |
10 |
|
Maximum Setpoint Temperature |
30 |
|
Minimum Setpoint Humidity Ratio |
0.0008 |
|
Maximum Setpoint Humidity Ratio |
0.0091 |
|
Reference Setpoint Node Name |
1205 |
|
Mixed Air Stream Node Name |
1205 |
|
Outdoor Air Stream Node Name |
1204.5 |
|
Return Air Stream Node Name |
1200 |
|
Setpoint Node or NodeList Name |
1204.5 |
|
|
NodeList |
|
Name |
MANodeLIST_AHU-1 |
|
Node Name1 |
1205 |
|
|
1207 |
|
|
1208 |
|
|
1204.5 |
Making me think?.
"He who is kind is free, even if he is a slave. He who is evil is a slave, even if he is king."