You could:
1) reduce the capacity of the system (I don't know how you sized it)
2) increase the zone interior thermal mass
Example:
InternalMass,
Basement Internal Mass, !- Name
InteriorFurnishings, !- Construction Name
Basement, !- Zone Name
7126.2120; !- Surface Area
Construction,
InteriorFurnishings, !- Name
Std Wood 6inch; !- Outside Layer
by changing thickness or density
Material,
Std Wood 6inch, !- Name
MediumSmooth, !- Roughness
0.15, !- Thickness {m}
0.12, !- Conductivity {W/m-K}
##if #[Construction_Type[] EQS Heavy]
1080.0000, !- Density {kg/m3}
##elseif #[Construction_Type[] EQS Light]
540.0000, !- Density {kg/m3}
##endif
1210, !- Specific Heat {J/kg-K}
0.9000000, !- Thermal Absorptance
0.7000000, !- Solar Absorptance
0.7000000; !- Visible Absorptance
3) tweak the air thermal capacitance - ZoneCapacitanceMultiplier:ResearchSpecial
On 7/14/2011 6:16 AM, Denis wrote:
Hi everyone,
I am new to E+, and hope if some of you can help me out on this.
I have a simple system, district heating as the supply heat source, which then connected to a radiator (currently using Baseboard:Convective:Water object) for the demand side. A constant flow rate pump is on the inlet side of the supply part, and the remaining node connections are in Pipe:Adiabatic.
The building is a single zone, one story house, with a setpoint schedule for the room thermostat as:
00:00 - 07:00: 10 deg C
07:00 - 23:00: 21 deg C
23:00 - 24:00: 10 deg C
Since the Air Temperature is well above the setpoint between 00:00 - 07:00, and so the heating wouldn't kicked in after 07:00. What I am not so sure about is the rate of temperature increase is too quick (about 2 deg C per 10 minutes). I have tried adding some air infiltration, but occasionally the HVAC system doesn't converge at its maximum iterations. Is there any other heat source component that I can use, which can simulated a more graduated increase in the air temperature?
Many thanks,
Denis
-- Richard A. Raustad Senior Research Engineer Florida Solar Energy Center University of Central Florida 1679 Clearlake Road Cocoa, FL 32922-5703 Phone: (321) 638-1454 Fax: (321) 638-1439 or 1010 Visit our web site at: http://www.fsec.ucf.edu UCF - From Promise to Prominence: Celebrating 40 Years
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