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CDAE 170 Solar Building Strategies Class #7 Oct. 18, 2003

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CDAE 170 Solar Building Strategies Class #7 Oct. 18, 2003. Gary Flomenhoft BSME, MAPP, CEE Research Associate Gund Institute, SNR. Review of Glazing-Chiras. Window glazing: South glass: 7-12\% of floor footage North glass: <=4\% East glass: <=4\% West glass: <=2\%.

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Presentation Transcript
slide1
CDAE 170

Solar Building Strategies

Class #7 Oct. 18, 2003

Gary Flomenhoft

BSME, MAPP, CEE

Research Associate

Gund Institute, SNR

slide2
Review of Glazing-Chiras

Window glazing:

South glass: 7-12% of floor footage

North glass: <=4%

East glass: <=4%

West glass: <=2%

slide3
Direct Gain Principles-Kachadorian

East, South and West glass should be 10-20% of total exterior heated wall area

Peak supplied February day increase in solar slab temperature should be 8 degrees.

slide5
Review of Indirect Gain Thermal Mass-Chiras

(Thermal storage or Trombe wall)

Vented Trombe wall

slide11
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

slide22
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

or

INDIRECT FLOOR MASS: glazing >7%sq.ft. x 40

or

DIRECT or INDIRECT WALL MASS* in solar room: glazing >7% x 8.3

*Not everyone agrees

slide23
Review of Indirect Gain Thermal Mass-Chiras

(Thermal storage or Trombe wall)

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