Advanced Wall Systems

ORNL Home ASTM Testing BEP Home Related Sites Work With Us Advanced Wall Systems Home

Hotbox Test R-value Database

BABB Wall Systems

   

Summary Of Hotbox Test Data And Calculations

 

Test 1

Tests performed Fall 2001 click here for test specifics

C-TEMP

weighted average of surface and joint TC's, climate side (°F)

28.4

M-TEMP

weighted average of surface and joint TC's, meter side (°F)

74.6

MA-AIR-T

average of 36 air TC's, meter side (°F)

79.7

M-BAF-T

average of 24 baffle TC's, meter side (°F)

78.2

C-AIR-T

average of 48 air TC's, climate side (°F)

26.1

MDIFFERC (°F)

Average temperature difference across metering box walls

-0.001

C-BAF-T

average of 36 baffle TC's, meter side (°F)

26.8

M-AIR-VC

air velocity, meter side (MPH)

0.52

C-AIR-VC

air velocity, climate side (MPH)

2.24

TMP-DC (Btu/Hr)

Total measured energy into metering box (Btu/hr)

416.5

∆T

temperature difference across sample wall

46.3

T(mean)

mean temperature across sample wall

51.5

Qmb

energy exchange through meter box walls (Btu/hr)

0.007

Mflank (Btu/Hr)

meter box flanking loss, determined by calibrations

4.834

Qwall

calculated energy flow through specimen wall (Qwall - Qsurr)

411.7

Face-To-Face Rwall

surface to surface R-value of wall (hr*ft2*°F/Btu)

7.2

Air-To-Air Ru wall

overall R-value of sample wall (air-to-air),
Rms air + Rwall + Rcs air (hr*ft2*°F/Btu)

8.3

Rms air

meter side air film resistance (hr*ft2*°F/Btu)

0.744

Rcs air

climate side air film resistance (hr*ft2*°F/Btu)

0.325

Home

<<Back

 
 
 
 
 
 
 
 
 
 
©2004 Oak Ridge National Laboratory

Contact Us