The current, Version 7.0, IdealLoadsAirSsystem is quite different from the original PurchasedAir system.
ZoneHVAC:IdealLoadsAirSystem,
Zone1 Ideal Loads System, !- Name
AlwaysOn, !- Availability Schedule Name
Zone1 Ideal Loads Supply Node, !- Zone Supply Air Node Name
Zone1 Ideal Loads Return Node, ! Zone Exhaust Air Node Name
50, !- Maximum Heating Supply Air Temperature {C}
13, !- Minimum Cooling Supply Air Temperature {C}
0.0156, !- Maximum Heating Supply Air Humidity Ratio {kg-H2O/kg-air}
0.0077, !- Minimum Cooling Supply Air Humidity Ratio {kg-H2O/kg-air}
NoLimit, !- Heating Limit
, !- Maximum Heating Air Flow Rate {m3/s}
, !- Maximum Sensible Heating Capacity {W}
NoLimit, !- Cooling Limit
, !- Maximum Cooling Air Flow Rate {m3/s}
, !- Maximum Total Cooling Capacity {W}
, !- Heating Availability Schedule Name
, !- Cooling Availability Schedule Name
ConstantSensibleHeatRatio, !- Dehumidification Control Type
0.7, !- Cooling Sensible Heat Ratio
None, !- Humidification Control Type
Office OA Specification, !- Design Specification Outdoor Air Object Name
Zone1 Ideal Loads OA Inlet Node, !- Outdoor Air Inlet Node Name
None, !- Demand Controlled Ventilation Type
NoEconomizer, !- Outdoor Air Economizer Type
Enthalpy, !- Heat Recovery Type
0.70, !- Sensible Heat Recovery Effectiveness
0.65; !- Latent Heat Recovery Effectiveness
Unless you know what you have entered or what the HVACtemplate has expanded for you, you can get many different results. The zone sizing and OA mixer are now in the same object.
This is the reason why I have suggested to looking at the basic report variables to confirm what the system is actualy doing and compare with the know physic rules.
It is still possible to make it behave like the old simple PurchasedIar system with the default settings..
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeannieboef@xxxxxxxxx
Date: Tue, 5 Jun 2012 13:01:50 +0000
Subject: [EnergyPlus_Support] Re: zone air humidity ratio
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
![]()
__,_._,___
ZoneHVAC:IdealLoadsAirSystem,
Zone1 Ideal Loads System, !- Name
AlwaysOn, !- Availability Schedule Name
Zone1 Ideal Loads Supply Node, !- Zone Supply Air Node Name
Zone1 Ideal Loads Return Node, ! Zone Exhaust Air Node Name
50, !- Maximum Heating Supply Air Temperature {C}
13, !- Minimum Cooling Supply Air Temperature {C}
0.0156, !- Maximum Heating Supply Air Humidity Ratio {kg-H2O/kg-air}
0.0077, !- Minimum Cooling Supply Air Humidity Ratio {kg-H2O/kg-air}
NoLimit, !- Heating Limit
, !- Maximum Heating Air Flow Rate {m3/s}
, !- Maximum Sensible Heating Capacity {W}
NoLimit, !- Cooling Limit
, !- Maximum Cooling Air Flow Rate {m3/s}
, !- Maximum Total Cooling Capacity {W}
, !- Heating Availability Schedule Name
, !- Cooling Availability Schedule Name
ConstantSensibleHeatRatio, !- Dehumidification Control Type
0.7, !- Cooling Sensible Heat Ratio
None, !- Humidification Control Type
Office OA Specification, !- Design Specification Outdoor Air Object Name
Zone1 Ideal Loads OA Inlet Node, !- Outdoor Air Inlet Node Name
None, !- Demand Controlled Ventilation Type
NoEconomizer, !- Outdoor Air Economizer Type
Enthalpy, !- Heat Recovery Type
0.70, !- Sensible Heat Recovery Effectiveness
0.65; !- Latent Heat Recovery Effectiveness
Unless you know what you have entered or what the HVACtemplate has expanded for you, you can get many different results. The zone sizing and OA mixer are now in the same object.
This is the reason why I have suggested to looking at the basic report variables to confirm what the system is actualy doing and compare with the know physic rules.
It is still possible to make it behave like the old simple PurchasedIar system with the default settings..
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: jeannieboef@xxxxxxxxx
Date: Tue, 5 Jun 2012 13:01:50 +0000
Subject: [EnergyPlus_Support] Re: zone air humidity ratio
IdealLoads HVAC
I think IdealLoads HVAC does "blend" air.
You specify
- Air delivery absolute humidity
- Temperature Setpoint for the zone
- Air delivery temperature to the zone
- ODA fresh air amount
e+ can auto calculate
- Total supply volume (fresh air + recirculated air) to meet the zone loads and maintain the zone temperature setpoint.
I think IdealLoads HVAC does "blend" air.
You specify
- Air delivery absolute humidity
- Temperature Setpoint for the zone
- Air delivery temperature to the zone
- ODA fresh air amount
e+ can auto calculate
- Total supply volume (fresh air + recirculated air) to meet the zone loads and maintain the zone temperature setpoint.
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___