40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  PSL  Not logged in ELOG logo
Message ID: 178     Entry time: Tue Jun 29 11:15:40 2010
Author: Frank 
Type: Notes 
Category: Foam 
Subject: foam physical properties 

physical properties for the new yellow foam used for insulation (Certifoam 25):

thermal conductivity k (Btu/h ft2 °F):
@ 75° F mean :  0.200
6-Month Aged Values @ 75° F mean : 0.192
fresh (As Manufactured) : 0.11

assuming ~0.2 Btu/h ft2 °F the calculated k-value in Si units is 1.136 W/m2-K which matches the R-value given below

 

density  : 29 kg/m3

 

thermal resistance (R-value, 1in thickness)  : 0.88 K-m2/W

The conversion between SI and US units of R-value is 1 h·ft²·°F/Btu = 0.176110 K·m²/W, or 1 K·m²/W = 5.678263 h·ft²·°F/Btu.

 

 English Unit

Quantity

Multiply by

Factor

Metric Unit

inch

1

25.4

25.40

mm

foot

1

0.3048

0.30

m

in2

1

645.16

645.16

mm2

ft2

1

0.09290304

0.09

m2

ft3/min

1

0.0004719

0.00

m3/s

BTU/hr

1

0.2930711

0.29

W

BTU/hr-ft-F

1

1.729577

1.73

W/m-K

BTU/hr-ft2

1

3.1546

3.15

W/m2

BTU/hr-ft2-F

1

5.67826

5.68

W/m2-K

BTU-in/hr-ft2-F

1

0.144228

0.14

W/m-K

F-ft2-hr/BTU-in

1

6.9333466

6.93

m-K/W

F-ft2-hr/BTU

1

0.176109

0.18

m2-K/W

lbf/ft3

1

16.01846

16.02

kg/m3

lbf/ft2

1

47.88026

47.88

Pa

mph

1

0.44704

0.45

m/s

 

 


ELOG V3.1.3-