Re: [EnergyPlus_Support] HeatPump Equation Fit Calculator

Subject: Re: [EnergyPlus_Support] HeatPump Equation Fit Calculator

From: Chandan Sharma <csharma@xxxxxxxxxxxx>

Date: Tue, 12 Jul 2011 12:39:55 -0400

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Hi,

The same spreadsheets which are used for generating parameters can be used for generating curve fits (tab: CoeffCalculator). I am not very sure about this but the parameter coefficients are dependent on the refrigerant type but the curve fits values are indendent of refrigerant as I don't see them being used in the VBA model (module: CoeffCalculator). (You can check to verify).

Sorry, I am not aware of any other tool which can be used to calculate curve fits with R410A as an option.

Hope this helps.

Chandan

On 7/12/2011 11:38 AM, Karen Walkerman wrote:

Hi,

Is anyone aware of a calculator that (based on manufacturer's data) will provide coefficients for equation fit heat pumps? I have tried to use the "HeatPump-WatertoWater-WatertoAir-SpreadsheetsAndDocs" calculators available on the helpdesk, but have not been able to create satisfactory parameter estimation coefficients, so would like to try an equation fit model instead.

Another question: The "HeatPump-WatertoWater-WatertoAir-SpreadsheetsAndDocs" calculators do not offer R410A refrigerant as an option. I believe that I could get much better results with this alternative. How can I add this to the calculator?

Thanks,

--

Karen

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