DOE-2 Reference Manual Version 2.1 - DOE2.com

To use Table IIL1 the user should first determine, frommanufacturer's 1 iterature, the transmittance and number ofpanes desired, and whether the window has a reflectivecoating. For uncoated windows, choose the GLASS-TYPE-CODEbetween 1 and 8 that gives a transmittance closest to thedes ired transmittance. For coated windows, chooseGLASS-TYPE-CODE = 9, 10, or 11.If SHADING-SCHEDULE is assigned to a window (see WINDOWcommand) the resultant solar heat gain calculated from thetransmission/ absorption coefficients will be multipl ied bythe schedule value.SHADING-COEFis specified if the ASHRAE shading coefficient method isused. This keyword value is a number between 0.0 and 1.00as specified in Chap. 26 of Ref. 5. If SHADING-COEF isentered, the program will first calculate the solar heatgain using transmission coefficients for clear, 1/8"thick, single-pane, double-strength sheet glass. Thissolar heat gain is then multipl ied by the value ofSHADING-COEF to determine the resultant sol ar heat gain.Thus, resultant solar heat gain = SHADING-COEF x (solarheat gain for standard glass).The shading coefficient depends in general not only on thetype of glass, but also on whether venetian blinds, shades,draperies, etc., are used with the window. To simulateoperable devices of this kind, the user may assign aSHADING-SCHEDULE to a window (see WINDOW command). Theresultant solar heat gain each hour will then be multiplied by the schedule value.NOTE: If SHADING-COEF is used, and PANES ~ 1, the onlyeffect of specifying the number of panes will be to changethe default value for GLASS-CONDUCTANCE.GLASS-CONDUCTANCE is used to specify the heat conductance of the totalwindO