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Hotbox Test R-value Database

Arxx Wall Technologies

 

Summary Of Hotbox Test Data And Calculations

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Test 1

Tests performed Winter 2000

click here for test specifics

M-REBAR
Average rebar surface temperature, meter side (°F)

78.42

C-REBAR
Average rebar surface temperature, climate side (°F)

19.43

M-JOINT
Average block joint surface temperature, meter side (°F)

78.10

C-JOINT
Average block joint surface temperature, climate side (°F)

19.14

M-REINF
Average block reinforcement material surface temperature, meter side (°F)

77.25

C-REINF
Average block reinforcement material surface temperature, climate side (°F)

1935

M-SUR-T
Average foam temperature, meter side (°F)

78.30

C-SUR-T
Average foam temperature, climate side (°F)

19.08

MTEMP
Overall wall surface temperature, meter side (°F) (not weighted)

78.02

CTEMP
Overall wall surface temperature, climate side (°F) (not weighted)

19.25

C-AIR-T
Air temperature, climate side (°F)

79.72
M-BAF-T
Baffle temperature, meter side (°F)
17.92
C-BAF-IA
Average baffle temperature of 20 individual center area TCs, climate side (°F)
17.31
C-BAF-T
Overall baffle temperature, climate side (°F)
17.34
MDIFFERC
Temperature difference across meter walls (°F)
0.00
M-AIR-VC
Air velocity, meter side (mph)
0.72
C-AIR-VC
Air velocity, climate side (mph)
3.24
TMP-DC
Total meter energy input (BTU/hr)
204.15
Q(mbox)
Total energy through meter walls (BTU/hr)
0.00
Q(wall)
Total energy through sample (BTU/hr)
204.15
R(wall)
Surface to surface R-value of sample (Hr•Ft²•°F/BTU)
18.41
Ru-Value
Air to air R-value of sample (Hr•Ft²•°F/BTU)
21.01
Rms
Air film coefficient, meter side
0.58

Rcs
Air film coefficient, climate side

0.45

 

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