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RE: [EnergyPlus_Support] Underheating and 100%OA





I can’t understand how it is possible without any heat from Plants having temperature inside the zone 19-21C, when outside is +26C.

The only one idea  comes into mind � itts heat transfer to the ground but in this case why there is so big difference for different zones.

 

 

 

 

 

 

BR,

Artem Zhukov

 

HVAC Consultant/Building Simulation Engineer

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Mob.: +420 774 081 898

SKYPE: zhukov_artem

Description: Description: cid:image002.gif@01CE20BA.EBEB5F00View profile

 

Web Cal

 

BE RESPONSIBLE. THINK ABOUT THE ENVIRONMENT BEFORE PRINTING THIS E-MAIL OR ITS ATTACHMENTS

 

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Jean Marais
Sent: Monday, September 16, 2013 12:20
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Underheating and 100%OA

 

 

Tip: define also for sizing days:
Schedule:Compact,
SHOP heating thermostat Schdl, !- Name
Temperature, !- Schedule Type Limits Name
Through: 12/31, !- Field 1
For: WinterDesignDay, !- Field 2
Until: 09:00, 19, !- Field 4
Until: 22:00, 19, !- Field 6
Until: 24:00, 19, !- Field 8
For: AllOtherDays, !- Field 2
Until: 09:00, 15, !- Field 4
Until: 22:00, 19, !- Field 6
Until: 24:00, 15; !- Field 8

Sorry, didn't spot anything else. Report the mass flow and temps on the air and water nodes...

 

On 16 September 2013 08:52, Artem Zhukov <artem.zhukov@xxxxxxxxxxx> wrote:

Dear colleagues,

I cant find an error why main part of premises are underheated and from other side, nevertheless there Sizing:System-

Sensible, !- Type of Load to Size On

autosize, !- Design Outdoor Air Flow Rate {m3/s}

0.2, !- Minimum System Air Flow Ratio

AND

AirTerminal:SingleDuct:Uncontrolled

The main part such systems work at 100% of fresh air always. The internal loads are quite big (~60W/m2), it is shopping center.

The model was made from Template:Unitary system and just a bit justified, but it runs completely strange.

Thank you very much

BR,

Artem Zhukov

HVAC Consultant/Building Simulation Engineer

logo

Mob.: +420 774 081 898

SKYPE: zhukov_artem

Description: Description: cid:image002.gif@01CE20BA.EBEB5F00View profile

Web Cal

BE RESPONSIBLE. THINK ABOUT THE ENVIRONMENT BEFORE PRINTING THIS E-MAIL OR ITS ATTACHMENTS

 



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