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[EnergyPlus_Support] Electric Input to Cooling Output Ratio Function of Part Load Ratio Curve£¿
I want a cop curve when it is part load ratio(PLR). In the E+
example,it gives a curve like this¡£Shown as below:
! Energy Input to Cooling Output Ratio Function of Part Load Ratio
Curve for open or hermetic water-cooled centrifugal chillers
! Same as DOE-2.1E HERM-CENT-EIR-FPLR (EIRPLR3) and OPEN-CENT-EIR-
FPLR (EIRPLR1)
CURVE:QUADRATIC,
ChillerCentEIRFPLR, !- Name
0.222903, (c) !- Coeff1 Constant
0.313387, (b) !- Coeff2 x
0.463710, (a) !- Coeff3 x**2
0.0, !- minimum value of x
1.0; !- maximum value of x
I draw the QUADRATIC ¡°y=a.*x.^2+b.*x+c¡± in the figure (see the
uploaded file,please)
1. I found that when the PLR=1(full load), the cop(1/EIR)=1.
As shown in I\O reference P462(E1.2.3),it says ¡®The EIR is the
inverse of the COP¡¯ and ¡®the energy input to cooling output ratio
(EIR)¡¯ .SO I think the cop=1/EIR .Am I right ?
2. IN ¡®Field: Electric Input to Cooling Output Ratio Function
of Part Load Ratio Curve¡¯ , it also says ¡®This curve should have a
value of 1.0 when the part-load ratio equals 1.0.¡¯ But I think
when the PLR =1(full load),the cop should be higher than 1.
3 I think the curve should rise to the max value and then
fall when the PLR changes from 0 to 1. BUT the figure does not
show like this .Why ?
4. I need some curve(cop fuction of PLR) about WSHP or water
chiller, can someone give me some advice ? I can not find it from
the manufacture¡¯ swatch.
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