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DOE-2 Reference Manual Version 2.1 - DOE2.com

DOE-2 Reference Manual Version 2.1 - DOE2.com

DOE-2 Reference Manual Version 2.1 - DOE2.com

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RATED-CCAP-FCFM *RATED-CEIR-FCFM *RATED-SH-FCFM *COIL-SFis the U-name of a linear, quadratic, or cubic equationthat describes the rated cooling capacity (dependentvariable) as a function of supply air flow rate/rated cfm(independent variable). The linear, quadratic, or cubicequation must be input to the program and U-named in aCURVE-FIT instruction. The equation should be normalized sothat at RATED-CFM its value is 1.D.is the U-name of a linear, quadratic, or cubic equationthat describes the rated Electric Input Ratio for cooling(dependent variable) as a function of supply air flowrate/rated cfm (independent variable). The linear, quadraticor cubic equation must be input to the program and U-named ina CURVE-FIT instruction. The equation should be normalizedso that at RATED-CFM its value is 1.0.is the U-name of a linear, quadratic, or cubic equation thatdescribes the rated sensible cooling capacity (dependentvariable) as a-runction of supply air flow rate/rated cfm(independent variable). The linear, quadratic, or cubicequation must be input to the program and U-named in aCURVE-FIT instruction. The equation should be normalized sothat at RATED-CFM its value is 1.0.is the cooling coil full load rated bypass factor. Thisvalue is used to characterize the performance of a coolingcoil. Using the bypass model, the exit air stream from acoil is characterized as being composed of two components:one component leaves the coil at the coil surface temperatureand at or below the corresponding saturation humidity ratio(depending upon whether the entering air humidity ratio wasabove or below this saturation value); the other componentleaves at the same temperature and humidity ratio as theentering air stream (thus the bypass name). The fraction ofthe total air flow in the bypassed component is the bypassfactor. The graphical representation is shown in Fig. IV.2S.-'=o:>,~-0.06NI.0WE ~oWL '5ws Ct:Dry-bulb Temperoture (OF)EI "Fig. IV.2S.Determining the coil bypass factor.IV.246 (Revised 5/81)

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