[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[EnergyPlus_Support] Re: VRF air conditioning system performance curve

Thank you very much for your help!

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Bereket Nigusse <nigusse_ba@...> wrote:
>
> There is a report that demonstrates on how to create performance curves for VRF at Florida Solar Energy Center (FSEC) at the link below.
>  
> http://www.fsec.ucf.edu/en/publications/pdf/FSEC-CR-1910-12.pdf
>  
> Creating Performance Curves for Variable Refrigerant Flow Heat Pumps in EnergyPlus
>  
> This report guides how to create the various performance curves required.
>  
>  
> Bereket Nigusse
> Florida Solar Energy Center
> 
>  
> 
> Bereket A N
> 
> --- On Sat, 10/13/12, soohyeunyang <soohyeunyang@...> wrote:
> 
> 
> From: soohyeunyang <soohyeunyang@...>
> Subject: [EnergyPlus_Support] VRF air conditioning system performance curve
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Date: Saturday, October 13, 2012, 6:06 AM
> 
> 
> 
>   
> 
> 
> 
> I have a question about performance curve.
> I have constructed the VRF air conditioning system using VRF example file(version 7.0)
> Cooling(Heating) Capacity Ratio modifier Function of Temperature Curve, Cooling(Heating) Capacity Modifier Curve Function of Flow Fraction, Cooling(Heating) Capacity Ratio Modifier Function of Low(High) Temperature Curve, Cooling(Heating) Capacity Ratio Boundary Curve, and etc. shoud be entered in IDF file.
> But, I don't know exactly how the coefficient constant, coefficient x, coefficient x**2, coefficient y, coefficient y**2, coefficient x*y values in Peformance Curves are decided.
> I have refered to the "EngineeringReferences".
> For example, the equation in connection with DX cooling coil capacity coefficents are decided using a regression analysis. At this point, a regression analysis uses the entering wet-bulb temperature, outdoor dry-bulb Temperature and total cooling capacity. I am wondering how i know these values and selection criteria. And does a regression analysis conduct using E+?
> Please give me tips.
> Thank you.
>




------------------------------------

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/