A few more points that I have observed.
============
Compact schedules:
For: WeekendsAndAllOtherDays includes the DesignDays. Therefore my DesignDay only simulation do not see the system running. Normally, the DesignDay should be with the weekdays, unless the load is higher at the weekends.
When the system is not available, the temperature setting has no effect.
===============
ZoneHVAC:EquipmentConnections,
1-K, !- Zone Name
Zone1Equipment, !- Zone Conditioning Equipment List Name
Zone1Inlets, !- Zone Air Inlet Node or NodeList Name
, !- Zone Air Exhaust Node or NodeList Name
Zone 1 Node, !- Zone Air Node Name
Zone 1 Outlet Node; !- Zone Return Air Node Name
This is where you changed the zond name. Normally, Zone1 should remain as 1-K.
==========================
##def ZoneHVAC_EqCn [ ZoneNM ]
ZoneHVAC:EquipmentConnections,
ZoneNM, !- Zone Name
ZoneNM EquipmentList, !- Zone Conditioning Equipment List Name
ZoneNM Air Inlet Node, !- Zone Air Inlet Node or NodeList Name
, !- Zone Air Exhaust Node or NodeList Name
ZoneNM Air Node, !- Zone Air Node Name
ZoneNM Air Outlet Node; !- Zone Return Air Node Name
##enddef
=========================
ZoneHVAC_EqCn [ 1-K ]
ZoneHVAC_EqCn [ 2-k ]
ZoneHVAC_EqCn [ 3-K ]
ZoneHVAC_EqCn [ 4-K ]
ZoneHVAC_EqCn [ 5-K ]
Typing the above five lines in the .imf file will expended to the five objects in the .empIDF file.
The people, electric, equipment list, zone equipment, etc. can all be included in the above macro list definition.
============
AirLoopHVAC,
Typical Terminal Reheat 1, !- Name
Reheat System 1 Controllers, !- Controller List Name
Reheat System 1 Avail List, !- Availability Manager List Name
autosize, !- Design Supply Air Flow Rate {m3/s}
Air Loop Branches, !- Branch List Name
, !- Connector List Name
Air Loop Inlet Node, !- Supply Side Inlet Node Name
Return Air Mixer Outlet, !- Demand Side Outlet Node Name
Zone Equipment Inlet Node, !- Demand Side Inlet Node Names
Air Loop Outlet Node; !- Supply Side Outlet Node Names
You are calling this air loop as a reheat terminal. Actually it is a system AHU [AHY1 system].
The air loop branches list points to the air loop main branch which includes the OA mixer box, cooling coil and the fan. All the components in the macro should have the AHU1 as the prefix. =======
I have not found the set point temperature for the AHU. Because you are using setpoint control for the coil, the zone thermostat is not used directly. I shall try to re group your file to trace the air loop controllers and the cooling coil controller, and the controller MixedAir.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: xing.shi.2006@xxxxxxxxx
Date: Wed, 7 Sep 2011 23:58:24 +0000
Subject: [EnergyPlus_Support] Re: Why T becomes so low
__._,_.___
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.
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__,_._,___
============
Compact schedules:
For: WeekendsAndAllOtherDays includes the DesignDays. Therefore my DesignDay only simulation do not see the system running. Normally, the DesignDay should be with the weekdays, unless the load is higher at the weekends.
When the system is not available, the temperature setting has no effect.
===============
ZoneHVAC:EquipmentConnections,
1-K, !- Zone Name
Zone1Equipment, !- Zone Conditioning Equipment List Name
Zone1Inlets, !- Zone Air Inlet Node or NodeList Name
, !- Zone Air Exhaust Node or NodeList Name
Zone 1 Node, !- Zone Air Node Name
Zone 1 Outlet Node; !- Zone Return Air Node Name
This is where you changed the zond name. Normally, Zone1 should remain as 1-K.
==========================
##def ZoneHVAC_EqCn [ ZoneNM ]
ZoneHVAC:EquipmentConnections,
ZoneNM, !- Zone Name
ZoneNM EquipmentList, !- Zone Conditioning Equipment List Name
ZoneNM Air Inlet Node, !- Zone Air Inlet Node or NodeList Name
, !- Zone Air Exhaust Node or NodeList Name
ZoneNM Air Node, !- Zone Air Node Name
ZoneNM Air Outlet Node; !- Zone Return Air Node Name
##enddef
=========================
ZoneHVAC_EqCn [ 1-K ]
ZoneHVAC_EqCn [ 2-k ]
ZoneHVAC_EqCn [ 3-K ]
ZoneHVAC_EqCn [ 4-K ]
ZoneHVAC_EqCn [ 5-K ]
Typing the above five lines in the .imf file will expended to the five objects in the .empIDF file.
The people, electric, equipment list, zone equipment, etc. can all be included in the above macro list definition.
============
AirLoopHVAC,
Typical Terminal Reheat 1, !- Name
Reheat System 1 Controllers, !- Controller List Name
Reheat System 1 Avail List, !- Availability Manager List Name
autosize, !- Design Supply Air Flow Rate {m3/s}
Air Loop Branches, !- Branch List Name
, !- Connector List Name
Air Loop Inlet Node, !- Supply Side Inlet Node Name
Return Air Mixer Outlet, !- Demand Side Outlet Node Name
Zone Equipment Inlet Node, !- Demand Side Inlet Node Names
Air Loop Outlet Node; !- Supply Side Outlet Node Names
You are calling this air loop as a reheat terminal. Actually it is a system AHU [AHY1 system].
The air loop branches list points to the air loop main branch which includes the OA mixer box, cooling coil and the fan. All the components in the macro should have the AHU1 as the prefix. =======
I have not found the set point temperature for the AHU. Because you are using setpoint control for the coil, the zone thermostat is not used directly. I shall try to re group your file to trace the air loop controllers and the cooling coil controller, and the controller MixedAir.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: xing.shi.2006@xxxxxxxxx
Date: Wed, 7 Sep 2011 23:58:24 +0000
Subject: [EnergyPlus_Support] Re: Why T becomes so low
Dr. Li, thanks!
We checked the SVG diagram and it seemed to be correct. In our configuration, only 5 big zones (from 1-k to 5-k) are conditioned spaces.
The shading of the basement is a minor thing because the basement wall has some little spaces outside that are digged down to provide natural lighting.
By the way, for some reason, I cannot download the error file you uploaded.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, YuanLu Li <yli006@...> wrote:
>
>
> Hi, HanSin I had simulated your IDF and had a quick look at the result. The error file is attached. The simulation configuration is not correct. The five fan coils in the air loop are not connected to any zones. Zone 1 to zone 5 do not exist in you IDF. You have infiltration in all zones. The zone temperature is simply flowing the outside air temperature and regulated by the ground temperature. There is no zone heating or cooling load. Zone -1-T seems to in the basement. There are errors on shading. If -1-T is a basement, then all the shading on the windows are very strange arrangement. I cannot tell exactly, because your z in the zone origin is 3.5 and the z in the floor is -7. I always use one origin for the building input.
>
> Dr. Li
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: xing.shi.2006@...
> Date: Wed, 7 Sep 2011 18:35:36 +0800
> Subject: [EnergyPlus_Support] Why T becomes so low
>
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> Attached is our IDF file. It is a 5-story building with two chillers for cooling and electric heating. The srange thing is that the simulation shows that the zone T is well controlled as the schedule defines in winter (20 degree C). However, in summer the schedule wants to maintain the zone T at 26 degree C but the output shows that the T overshoots to 20 degree C.
> We replaced the HVAC system with IdealSystem and the zone T is well controlled. I guess this means that the schedule has no error. We have been working on this problem for several days and are really puzzled.
> Please help. Thanks! XS
>
We checked the SVG diagram and it seemed to be correct. In our configuration, only 5 big zones (from 1-k to 5-k) are conditioned spaces.
The shading of the basement is a minor thing because the basement wall has some little spaces outside that are digged down to provide natural lighting.
By the way, for some reason, I cannot download the error file you uploaded.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, YuanLu Li <yli006@...> wrote:
>
>
> Hi, HanSin I had simulated your IDF and had a quick look at the result. The error file is attached. The simulation configuration is not correct. The five fan coils in the air loop are not connected to any zones. Zone 1 to zone 5 do not exist in you IDF. You have infiltration in all zones. The zone temperature is simply flowing the outside air temperature and regulated by the ground temperature. There is no zone heating or cooling load. Zone -1-T seems to in the basement. There are errors on shading. If -1-T is a basement, then all the shading on the windows are very strange arrangement. I cannot tell exactly, because your z in the zone origin is 3.5 and the z in the floor is -7. I always use one origin for the building input.
>
> Dr. Li
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: xing.shi.2006@...
> Date: Wed, 7 Sep 2011 18:35:36 +0800
> Subject: [EnergyPlus_Support] Why T becomes so low
>
>
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> Attached is our IDF file. It is a 5-story building with two chillers for cooling and electric heating. The srange thing is that the simulation shows that the zone T is well controlled as the schedule defines in winter (20 degree C). However, in summer the schedule wants to maintain the zone T at 26 degree C but the output shows that the T overshoots to 20 degree C.
> We replaced the HVAC system with IdealSystem and the zone T is well controlled. I guess this means that the schedule has no error. We have been working on this problem for several days and are really puzzled.
> Please help. Thanks! XS
>
__._,_.___
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.
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