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Hotbox Test R-value Database

Concrete Panel With Metal Connectors

 

Summary Of Hotbox Test Data And Calculations

Tests performed May 2001

 

Meter side air temperature (°F)

70.1

Meter side air velocity (MPH)

0.3

Meter side connector area temp (°F)

66.4

Meter side concrete penetration temperature (°F)

--

Meter side rebar area temperature (°F)

66.0

Meter side joint area temperature (°F)

--

Meter side concrete panel area temperature (°F)

66.8

Average meter side wall surface temperature (t1) (°F)

66.7

Climate side air temperature (tc) (°F)

20.1

Climate side air velocity (MPH)

2.4

Climate side connector area temp (°F)

22.4

Climate side concrete penetration area temperature (°F)

--

Climate side rebar area temperature (°F)

21.7

Climate side joint area temperature (°F)

--

Climate side concrete panel surface temperature (°F)

21.9

Average climate side wall surface temperature (°F)

21.9

Meter side center hole area temp (°F)

--

Panel mean temperature (°F)

44.3

Total measured energy into meter box (TMP) (Btu/hr )

378.7
Energy through meter box walls (Q mbox) (Btu/hr )
0.02
Energy Input (total energy through wall) (Q h +Q r ) (Btu/hr )
378.7

Clear wall R-value (R) (h ft² E F/Btu )

7.6

Meter side air film resist. (R ms air) (h ft² E F/Btu )

0.57

Climate side air film resist. (R cs air) (h ft² E F/Btu )

0.31

Ru-value, (R ms air +R + Rcs air) (h ft² E F/Btu )

8.5

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