Comments (12)
I'm not sure of an easy solution for this one. The DOE-2 curves and E+ curves
(either CoolTools or York model) are completely different in form.
I think it would be difficult to go from the DOE-2 default curve to the
EnergyPlus curve which has as many as 35 coefficients. Easier to go from the E+
curve default (if there is one) to the DOE-2 curve.
Original comment by JohnJArent
on 25 Jun 2012 at 9:48
- Changed state: Accepted
from cbecc.
John to follow up with Mark Hydeman and/or Dick Lord
Original comment by JohnJArent
on 6 Sep 2012 at 9:52
from cbecc.
Current plan is to use DOE-2 defaults for DOE-2 and EnergyPlus defaults for
EnergyPlus. Mark Hydeman says that both the DOE-2 and EnergyPlus curves are
"pretty good". This is not an ideal solution but may work if the performance of
the two is close enough. A brief investigation did not give any answers as to
how close the two modeling approaches are.
Original comment by JohnJArent
on 27 Sep 2012 at 12:12
from cbecc.
Original comment by JohnJArent
on 27 Sep 2012 at 12:13
- Changed state: Started
from cbecc.
The resolution to this issue is to use the DOE-2 default performance curve for
towers for DOE-2 software and use the EnergyPlus CoolTools curve for E+
software. Taylor Engineering indicated that both DOE-2 and E+ curves are
"pretty good". The user cannot modify the default performance curves.
Original comment by JohnJArent
on 21 Nov 2012 at 7:00
- Changed state: Fixed
from cbecc.
To support the Cool Tools model for cooling towers, I am proposing to add a new
object and HeatRejection reference property to support the ACM cooling tower
capacity curve
New Object: CurveCoolToolsCoolingTowerCapacity (CrvCoolToolsClgTowerCap)
Properties:
WetbulbTemperatureMinimum (WBTempMin)
WetbulbTemperatureMaximum (WBTempMax)
RangeTemperatureMinimum (RngTempMin)
RangeTemperatureMaximum (RngTempMax)
ApproachTemperatureMinimum (ApproachTempMin)
ApproachTemperatureMaximum (ApproachTempMax)
WaterFlowRatioMinimum (WtrFlowRatMin)
WaterFlowRatioMinimum (WtrFlowRatMax)
+ the 35 Coefficient properties (Coeff1-35)
Add the following reference property to HeatRejection object:
Capacity_fCoolToolsCurveReference (Cap_fCoolToolsCrvRef)
Please let me know if this works for you all before the next rule author
meeting (9am next Tues)
Original comment by [email protected]
on 5 Apr 2013 at 1:56
- Changed state: Discussion
from cbecc.
Haven't gotten any additional input, so will plan on adding these additional
curve types to the SDD Update list later today.
Original comment by [email protected]
on 9 Apr 2013 at 4:48
from cbecc.
David's approach to support the CoolTools cooling tower model in EnergyPlus is
appropriate. Let me know if any ACM changes are required.
Original comment by JohnJArent
on 1 May 2013 at 8:37
- Changed state: Resolved
from cbecc.
Roger,
I was scrambling to get HVAC airside instances to NREL when I logged my last
comment, so I never took any action on this. Since you and Noah are now
working on these rules, I suggest you guys add it to the SDD update list.
Original comment by [email protected]
on 1 May 2013 at 8:43
from cbecc.
OK, I'll take care of it.
Original comment by [email protected]
on 1 May 2013 at 10:08
from cbecc.
I think this should be taken care of - assigning to Roger to verify that this
has been done.
Original comment by JohnJArent
on 19 Sep 2013 at 9:21
- Changed state: Fixed
from cbecc.
Cooling towers are now modeled with the cooltools curves in EnergyPlus.
Original comment by [email protected]
on 7 Feb 2014 at 5:58
- Changed state: DoneVerified
from cbecc.
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