[BLDG-SIM] DOE2.1E Chiller performance

[Varkie Thomas]

We are trying to compare the performance of a 2000 ton chiller operating at (1) 42 F LWT and (2) 38 F LWT.  The chiller EWT is 56 in both cases.  The tower temp range is 85 F to 100 F.  We want to know how the chiller COP varies under these conditions.  

The hourly output for the design day from DOE2.1E shows chiller LWT of 44 F (DOE2 default) no matter what the input.  Here is the input and output for the option with 38 F Chiller LWT.  Can the Chiller LWT be changed from the default value of 44 F ?  How do I check that the CHW EWT & LWT temps are being maintained? Is the input below correct to model the conditions described?

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PLANT-PARAMETERS

CHILL-WTR-T = 37                     $ Def = 44. LWT at bottom of Thrott Range $
CHILL-WTR-THROTT = 2.0         $ Def = 2.5. Thrott Range = 37 to 39.  LWT = 38 $

TWR-SETPT-T = 85                      
TWR-DESIGN-RANGE = 15.0        $ Def = 10. Tower temp range :85 to 100 $ 

CCIRC-DESIGN-T-DROP = 18       $ Def = 10. Chiller EWT = 56 $

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MMDDHH    OPEN-CEN       OPEN-CEN    OPEN-CEN   OPEN-CEN   OPEN-CEN   OPEN-CEN
	T-CHLR         T-CHLR      T-CHLR     T-CHLR     T-CHLR     T-CHLR  
	LOAD           ELECTRIC    OPER PT    FRAC HR    ENTERING   LEAVING 
	USE         LD RATIO   OPERATED   COND TEM   COLD TEM
	BTU/HR         KW          FRAC.OR    FRAC.OR    F          F  	 
	MULT.      MULT.                    	 
	----( 1)       ----( 3)    ----(10)   ----(11)   ----(12)   ----(13)
	7 1 1             0.         0.000      0.000      0.000        0.0     	0.0
	7 1 2             0.         0.000      0.000      0.000        0.0     	0.0
	7 1 3             0.         0.000      0.000      0.000        0.0     	0.0
	7 1 4             0.         0.000      0.000      0.000        0.0     	0.0
	7 1 5             0.         0.000      0.000      0.000        0.0     	0.0
	7 1 6       8887730.       528.301      0.328      1.000       84.6     	44.0
	7 1 7      20704076.      1019.228      0.760      1.000       83.7     	44.0
	7 1 8      25529894.      1301.530      0.940      1.000       84.3     	44.0
	7 1 9      25563408.      1312.150      0.944      1.000       84.7     	44.0
	7 110      22676038.      1142.870      0.838      1.000       84.9     	44.0
	7 111      23148816.      1167.610      0.855      1.000       84.7     	44.0
	7 112      22012680.      1103.797      0.813      1.000       84.7     	44.0
	7 113      22536236.      1132.213      0.832      1.000       84.7     	44.0
	7 114      22738694.      1144.069      0.840      1.000       84.7     	44.0
	7 115      22827700.      1149.287      0.843      1.000       84.7     	44.0
	7 116      22768860.      1146.011      0.841      1.000       84.7     	44.0
	7 117      21899154.      1097.228      0.809      1.000       84.7     	44.0
	7 118      20232738.      1007.025      0.747      1.000       84.7     	44.0
	7 119             0.         0.000      0.000      0.000        0.0     	0.0
	7 120             0.         0.000      0.000      0.000        0.0     	0.0
	7 121             0.         0.000      0.000      0.000        0.0     	0.0
	7 122             0.         0.000      0.000      0.000        0.0     	0.0
	7 123             0.         0.000      0.000      0.000        0.0     	0.0
	7 124             0.         0.000      0.000      0.000        0.0     	0.0

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