cdae 170 solar building strategies class #7 oct. 18, 2003 gary flomenhoft bsme, mapp, cee research...
Post on 19-Dec-2015
213 views
TRANSCRIPT
CDAE 170 Solar Building StrategiesClass #7 Oct. 18, 2003
Gary FlomenhoftBSME, MAPP, CEEResearch AssociateGund Institute, SNR
Review of Glazing-Chiras
Window glazing:
South glass: 7-12% of floor footage
North glass: <=4%
East glass: <=4%
West glass: <=2%
Direct Gain Principles-Kachadorian
1. East, South and West glass should be 10-20% of total exterior heated wall area
2. Peak supplied February day increase in solar slab temperature should be 8 degrees.
OVERHANG p.107 (www.susdesign.com/overhang)
L = Length of Projection
H = Height of window opening
L = H / F 44º latitude: F=2.0-2.7
Review of Direct Gain Thermal Mass-Chiras
Sun-tempered = 7% of floor footage. Incidental mass takes care of it (sheetrock, framing, furniture)
>7% glazing needs extra mass.
MASS THICKNESS 4-6”
DIRECT FLOOR MASS: Each square foot of glazing over 7% x 5.5 orINDIRECT FLOOR MASS: glazing >7%sq.ft. x 40orDIRECT or INDIRECT WALL MASS* in solar room: glazing >7% x 8.3
*Not everyone agrees
Review of Indirect Gain Thermal Mass-Chiras
(Thermal storage or Trombe wall)
MATL DENSITY THICKNESS
CONCRETE 140 8-24
CONCRETE BLOCKS
130 7-8
CLAY BRICKS
120 7-16
LT WEIGHT CONCRETE MASONRY
110 6-12
ADOBE 100 6-12