Re: [EnergyPlus_Support] Annual Peak cooling variable ?

The Output:Table:Monthly object using the ?Maximum? aggregation type can be used to make your own summary table for any of these variables.

This does not help to plot the values of thousands of simulations at once, as is my objective- to use this would involve days of opening each HTML file and copy pasting to excel. The goal of running 1020 files as a single simulation (in jE+) is to have a single csv file with values. This method works fine using district cooling set to annual for analysis of total cooling consumption, but does not work for analysis of peak load.

There is also the meter called DistrictCooling:Facility. A meter variable requested at RunPeriod frequency does output the min and max during the runperiod. Min and max summary data are in the raw ESO file, but ReadVarsESO postprocessor only grabs the average value for the flat file.

I have used DistrictCoolingFacility: for cooling for energy consumption analysis. The current approach used for this object makes since as a total number. This cooling consumption output variable does not address the issue of the need for an object to report peak annual cooling load to CSV. Are you saying that ReadVarsEso PostProsser is capable of producing CSV files with the peak value of sensible cooling rate by some undocumented method?

Thank you

Jeremiah D. Crossett | Senior Analyst | Phase Change Energy Solutions

120 E. Pritchard St. | Asheboro, NC 27203 | Mobile 503-688-8951

www.phasechange.com

On Mon, Sep 17, 2012 at 3:04 PM, Griffith, Brent <brent.griffith@xxxxxxxx> wrote:

The Output:Table:Monthly object using the ?Maximum? aggregation type can be used to make your own summary table for any of these variables.

There is also the meter called DistrictCooling:Facility. A meter variable requested at RunPeriod frequency does output the min and max during the runperiod. Min and max summary data are in the raw ESO file, but ReadVarsESO postprocessor only grabs the average value for the flat file.

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Jeremiah Crossett
Sent: Monday, September 17, 2012 3:11 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx; Yi Zhang
Subject: [EnergyPlus_Support] Annual Peak cooling variable ?

Hello,
I have a parametric study of 1020 simulation "jobs" and with the objective function of minimizing peak cooling load. I have experimented with the bullet pointed output variables below but all have provided average numbers rather then maximum. I have read the documentation and checked old posts but do not see any way to output to a variable or meter the annual maximum sensible cooling load. Does anyone have a solution for this? I seem to remember there being a way to create custom output values, but did not find anything in documentation. I would think the peak cooling load would be useful for modelers/designers to be able to run many iterations to solve the lowest equipment size problem and am surprised that there is not an easy to do this- Possibly there should be a new feature added to Energy Plus that is for reporting called "maximum" ("minimum" would also do just fine, but "average" is not very useful for this)

Output:Variable,*,Zone/Sys Sensible Cooling Rate, !- HVAC Average [W]

Output:Variable,*,Zone/Sys Sensible Load Predicted, !- HVAC Average [W]
Output:Variable,*,Ideal Loads Heat Recovery Sensible Cooling Rate, !- HVAC Average [W]

Output:Variable,*,Ideal Loads Total Cooling Rate, !- HVAC Average [W]
Output:Variable,*,Ideal Loads Zone Total Cooling Rate, !- HVAC Average [W]

Output:Variable,*,Ideal Loads Zone Sensible Cooling Rate, !- HVAC Average [W]
Output:Variable,*,Total HVAC Electric Demand, !- HVAC Average [W]

Output:Variable,*,Total Building Electric Demand, !- HVAC Average [W]
Output:Variable,*,Total Electric Demand, !- HVAC Average [W]

Output:Variable,*,Zone Total Internal Total Heat Gain Rate, !- Zone Average [W]
Output:Variable,*,Zone Air Balance Air Energy Storage Rate, !- HVAC Average [W]

Attached is a results file with the issue of average not correlating to peak (minimum peak is in green)

Jeremiah D. Crossett | Senior Analyst | Phase Change Energy Solutions

120 E. Pritchard St. | Asheboro, NC 27203 | Mobile 503-688-8951

www.phasechange.com