Ignacio,
This looks good. One minor thing that i noticed is that LINEST function takes data up until row 21 while the spreadsheet has more data which can be used (till row 26).
The predicted CAP and EIR values are extrapolated for CWS = 18.
Chandan
On 12/1/2011 11:28 AM, Richard Raustad wrote:
Now that you know how to do this and understand it, I might direct you to the Table objects where you can enter data pairs, normalize the data, create performance curves, interpolate tables, extrapolate tables, or ride the performance curve created with the table. It's a little tricky to get used to the format, but once you do they work very well.
Table:OneIndependentVariable (used for EIRFPLR)
Table:TwoIndependentVariables (used for CAPFT and EIRFT)
On 12/1/2011 11:10 AM, Richard Raustad wrote:That looks good, I don't understand the color coding, but looking past that the user should be able to figure it out.
On the Info sheet. I would suggest more explanations. Copy this into your spreadsheet. Then upload it.
This is a spreadsheet used for calculating the CAPFT, EIRFT and EIRFPLR performance curves which are needed to model a chiller in EnergyPlus. For example, the "Chiller:Electric:EIR", or Chiller:Eelctric:ReformulatedEIR" models.
The data that we need from the manufacturer depends on the chiller model selected for simulation. The Chiller:Electric:EIR model uses leaving evaporator water temperature and entering condenser air or water temperature. The Chiller:Electric:ReformulatedEIR model uses leaving evaporator water temperature and leaving condenser air or water temperature To create the CAPFT performance curve, cooling capacity at several different conditions of supply chilled water temperature (outlet or leaving evaporator water temperature) and the condenser inlet or outlet water or air temperature is needed. The more data available, the better the performance curve. The data needed for the EIRFT curve is cooling capacity and power for different operating conditions (same conditions as CAPFT).
The data that we need from the manufacturer for the EIRFPLR curve are the cooling capacity and power for different Part Load Ratios or Loading Ratios (%).
These curves must be normalized to 1 at the rating point. This means that capacity data needs to be divided by the rated capacity. for EIR, the power divided by capacity is used, and also normalized by dividing by the rated EIR.
On the CAPFT, EIRFT, and EIRFPLR sheets, I would change Unit Rate to Power. You could also add units to make things very clear (e.g., Power (W), Capacity (W), etc.
Good job.
On 12/1/2011 10:44 AM, Nacho Gomis wrote:Hi again Richard and other reader,if there are.
I have the spreadsheet, I think is ready for uploading it to the files area.
If you can check it,I will be grateful.
Thanks,
Ignacio Gomis
-- 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
-- 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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