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A T L O

ference Data

Heat Loss Factors and Graphs

Heat Losses from Vertical Insulated Surfaces

8

v

è

V >

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^__--

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N

t

AJ£>

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I mm

(0 in.

Insu

lation

2600 2400 2200 2000 1800 1600 1400 1200 1000

800 600 400 200

LL

a) ü

È

t/3

e to

c

1. Based upon combined natural convection and radiation losses into 21°C (70°F) environment.

2. Insulation characteristics k = 0.67 @ 93°C (200°F)

k = 0.83 @ 537°C (1000°F)

3. For molded ceramic fiber products and packed or tightly packed insulation, losses will be lower than values shown.

For 2 or 3 inches Insulation multiply by 0.84 For 4 or 5 inches Insulation multiply by 0.81 For 6 inches Insulation multiply by 0.79

o a

È

o.

E

ai

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 Losses—W/in²

1.2 1.3 1.4 1.5 1.6 1.7 1.8

0 01

1400

1300 1200 1100 1000

iff

t

1

o

"ioO

if

7

O <D □

a E

e

I—

900

800 700 600

500

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Losses—W/in²

0

TI

» O C -*

o

Combined Convection and Radiation—Losses from Water Surfaces

210 190 170

ceo

AU

13

(B

—h

<E

(B 3

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0)

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a ^a

3

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3 ^o

3

o^f

_re

_tu^r

_ra^t_er

a

m

e

I-

50 30 110 90

70

For losses of molten metal surfaces, use the curve e=0.40.

100

200 300

400 500 600 700 800

Losses—W/ft²

900 1000 1100 1200 1300

399