kbk78's profile - activity

Listing of coils allowed in air loop Is there a listing of coils allowed in a central air loop. I am trying replace the

SetpointManager:MixedAir Reference node name in Blow-through fan placement I am trying to setup a blow-through vav airha

Equipment Sizing report differences Could someone provide the differences between the "Equipment Summary", "HVAC Sizing

Are there any plans to address this in the near future.

@mike765 you will need to install energyplus version 8.9 and use the version updater that comes with it. Then use versio

I see that version 9.1.0 has trouble transitioning some older version EnergyPlus Files. But the transition works fine wi

What should we do for the partload ratio curve EIRFPLR. Also can the chilled water supply temperature remain constant he

Hot water loop load reset What is the best way to simulate a Loads reset option so as to supply at the lowest temperatur

Monthly cooling coil sensible outputs. I am trying to obtain the monthly sensible cooling coil energy for the cooling co

If we have the pump "Fraction of Motor Inefficiencies to the Fluid Stream" set to 0, why would the pump head have an effect on the cooling load.

In the attached, energy plus version 9, test file that uses purchased cooling the "cooling load" changed from 1,018,159 kBtu to 990,412 kBtu . The only thing I changed was to zero out the pump head.

C:\fakepath\tb.idf.bmp

From the manual: ShaftPower = PumpPower * PumpMotorEfficiency PumpHeatToFluid = ShaftPower + (PumpPower - ShaftPower)

From the manual: ShaftPower = PumpPower * PumpMotorEfficiency PumpHeatToFluid = ShaftPower + (PumpPower - ShaftPower)

From the manual: ShaftPower = PumpPower * PumpMotorEfficiency PumpHeatToFluid = ShaftPower + (PumpPower - ShaftPower)

From the manual: ShaftPower = PumpPower  PumpMotorEfficiency PumpHeatToFluid = ShaftPower + (PumpPower - ShaftPower)

From the manual: ShaftPower = PumpPower  PumpMotorEfficiency PumpHeatToFluid = ShaftPower + (PumpPower - ShaftPower) *

Pump head influence on cooling load If we have the pump "Fraction of Motor Inefficiencies to the Fluid Stream" set to 0,

So the only way to ensure the cooling coil capacity matches with a predetermined system size is to make sure that the lo

Specifiying cooling coil and baseboard heater capacity The Coil:Cooling:Water does not seem have a way specify the capac

AirLoopHVAC:UnitaryHeatCool application for single zone To model a constant volume system when would I choose a cav syst

Thanks for your advice. Here is what appears to be working right: Use VAV fan system for the DOAS. Specify the demand

Thanks for your advice. Here is what appears to be working right: 1. Use VAV fan system for the DOAS 2. Specify the de

Thanks for your advice. Here is what I did and appears to be working right. 1) Use VAV fan system for the DOAS 2) Speci

Fan power accounting for a DOAS system with DCV It appears that DOAS system with DCV acts as a constant volume system an

Fan power accounting for a DOAS system with DCV It appears that DOAS system with DCV acts as a constant volume system an

Fan power accounting for a DOAS system with DCV It appears that DOAS system with DCV acts as a constant volume system an

Fan power accounting for a DOAS system with DCV It appears that DOAS system with DCV acts as a constant volume system an

SolarCollector performance data The solar Collector performance data listed in SolarCollector.idf dataset do not appear

Looking to run IDFVersionUpdater from the "commandline" and automate the process for repeated usage (whenever I export a

Looking to run IDFVersionUpdater from the "commandline" and automate the process for repeated usage (whenever I export a

running python on windows.

So essentially we would need to call each Transition-VA-B-C-to-D-E-F.exe sequentially for each intermediate versions if

IDFVersionUpdater using commandline I have multiple idf files in version 8.4 that I want to update to version 8.8. Doing

IDFVersionUpdater using commandline I have multiple idf files in version 8.4 that I want to update to version 8.8. Doing

@Raghu, question is about modeling a relief fan not about modeling economizer. The return fan on the AHU moves the retur

Designbuilder/EnergyPlus Relief fan How do I setup a relief fan on the AHU in designbuilder or energyplus. The fan would

Designbuilder/EnergyPlus Relief fan Is it possible to setup a relief fan on the AHU in designbuilder or energyplus. The

I am setting up a PackagedTerminalAirConditioner to run on constant fan during the day and cycle the fan at night. The system also provides outside air and looking to close the outside air dampers when the fan cycles at night. How could I achieve this?

The setup I have below does cycle the fan at night but also brings in outside air during night fan cycling.

ZoneHVAC:PackagedTerminalAirConditioner,
   zone1 PTAC,                  ! Component name
   On 24/7,                     ! Availability schedule
   zone1 PTAC Return,           ! Air inlet node to heat pump; also a zone exhaust node
   zone1 PTAC Supply Inlet,     ! Air outlet node to heat pump; also a zone inlet node
   OutdoorAir:Mixer,            ! Outdoor air mixer object type
   zone1 PTAC Outdoor Air Mixer,! Outdoor air mixer name
   autosize,                ! Supply air flow rate during cooling operation (m3/s)
   autosize,                    ! Supply air flow rate during heating operation (m3/s)
   autosize,           ! Supply air flow rate when no heating or cooling is needed (m3/s)
   autosize,                    ! Outdoor air flow rate during cooling operation (m3/s)
   autosize,             ! Outdoor air flow rate during heating operation (m3/s)
   autosize,          ! Outdoor air flow rate when no heating or cooling is needed (m3/s)
   Fan:OnOff,                   ! Type of supply fan
   zone1 PTAC Supply Fan,       ! Name of supply fan
   Coil:Heating:Gas,            ! Type of heating coil
   zone1 PTAC Heating Coil,     ! Name of heating coil
   Coil:Cooling:DX:SingleSpeed, ! Type of cooling coil
   zone1 PTAC DX Cooling Coil,  ! Name of cooling coil
   DrawThrough,                 ! Fan placement
   Fan cycle mode sch;          ! Supply air fan operating mode schedule

Schedule:Compact,Fan cycle mode sch,
   on/off,
   Through: 12/31,
   For: Weekdays SummerDesignDay,
   Until: 06:00,0.0,
   Until: 20:00,1.0,
   Until: 24:00,0.0,
   For: Saturday WinterDesignDay,
   Until: 06:00,0.0,
   Until: 18:00,1.0,
   Until: 24:00,0.0,
   For: Sunday Holidays AllOtherDays,
   Until: 24:00,0.0;

PackagedTerminalAirConditioner prevent Outdoor air during night cycle I am setting up a PackagedTerminalAirConditioner t

PackagedTerminalAirConditioner prevent Outdoor air during night cycle I am setting up a PackagedTerminalAirConditioner t

The two models are Identical except for the change in the zone sizing temperature. There is no cooling in the model.

I do not know why it would control to different temperatures in either case. Maybe there is some numerical instability and there is some impact as to what end of the deadband it is controlled to. A small change may be acceptable. But a 7% change does seem quite high, Would you agree.

Sorry, I don't understand what your answer intends to convey. Why is anything other than the fan power changing.

To your point about improbable model, I originally had a proper LEED model with heatpump heating and cooling. Found the savings jump 10% with changes just to the zone sizing temperature. To debug the same I created a very simple electric heating only model to minimize influence of other parameters.

Moreover, Why should it matter weather the model is probable or not?

@Tian, As I indicated I zeroed out the fan energy. the outputs attached indicate no fan energy consumed. For some reason there is a 7% change in the heating subcategory.