Experimental Wallboard: R-Value Experimental Wallboard: R-Value Validation Validation

Paul GollnickPaul GollnickDave GarrettDave GarrettWill WatsonWill Watson

8/13/078/13/07

OverviewOverview ObjectiveObjective

Test 1- Conduction apparatusTest 1- Conduction apparatus

Test 2- Tube TestTest 2- Tube Test

Test 3- Hot PlateTest 3- Hot Plate

RecommendationsRecommendations

ConclusionConclusion

ObjectiveObjective

1. Wallboard Testing: 1. Wallboard Testing:

The purpose of this series of experiments The purpose of this series of experiments

was to determine the heat transfer was to determine the heat transfer

coefficient and associated R-value for coefficient and associated R-value for

standard ½” composite wallboard standard ½” composite wallboard

2. Group2. Group: :

OurOur objective was to evaluate the objective was to evaluate the

problems associated with testing and problems associated with testing and suggest suggest

a more appropriate test methoda more appropriate test method

Test 1: Conduction ApparatusTest 1: Conduction Apparatus

Set Up #1 Set Up #2

Set Up #1 DataSet Up #1 DataPower 2.25 W 3.15 W 6.35 W 10.7 W

  ED#2 D#2 E.D#1 D#1 E.D#3 D#3 E.D#4 D#4

T1 47.51 45.7 54.1 55.6 84.4 83.96 118.8 120.47

T2 47.09 45.2 53.3 55.2 83.3 82.81 117.2 118.48

T3 46.36 44.5 52.3 54.2 82.4 81.87 115.9 118.48

T7 24.8 24.2 23.6 24.7 25.7 27.29 27.7 29.66

T8 24.8 24.2 23.5 24.6 25.6 27.18 27.4 29.54

T9 24.8 24.2 23.4 24.6 25.6 27.18 27.3 29.54

Temperature with Respect to Power: Experimental Wallboard vs. Standard Wallboard

0

20

40

60

80

100

120

T1 T2 T3 T7 T8 T9

Temperature Probe

Tem

per

atu

re (

c)

2.5 W E.D

2.5 W D

3.15 W E.D

3.15 W D

6.35 W E.D

6.35 W D

10.7 W E.D

10.7 W D

Test #1 AnalysisTest #1 Analysis

3)( DTTg

Ra sD

2

27/816/9

6/1

Pr/559.01

387.06.0

D

D

RaNu

D

kNuh D

)( 44sursrad TTAq

radconv qqqq 13

)( 733 TTA

Lqk

)( 37 TTAhq sconv

Test #2 DataTest #2 Data

 Power 6.2 W 6.2 W 10 W 15.1 W 6.15 W 9.85 W 13.45 W

E.D#1 E.D#2 E.D#3 E.D#4 D#1 D#2 D#3

T1 66.8 68.7 95.5 115.5 76.2 104.5 123.8

T2 66.8 68.3 93.1 115.3 75.1 103.7 124.4

T3 65.5 67.9 92.5 114.1 71.8 99.2 119.2

T7 32.1 34.7 41.9 48.5 30.4 33.4 34.7

T8 31.8 34.4 41.4 47.8 30.2 33 34.2

T9 31.7 34.3 41.2 47.4 30.1 32.8 34.1

Temperature along Heat Path

0

20

40

60

80

100

120

140

1 2 3 4 5 6

Thermocouple location

Tem

per

atu

re (

C)

6.2

6.2

10

15.1

6.15

9.85

13.45

Test # 2 AnalysisTest # 2 Analysis

13 qq )( 733 TTA

Lqk

Test 2: Tube TestTest 2: Tube Test

Thermal Conductivity Comparison: ACTR Wallboard vs. Standard

0

50

100

150

200

250

300

350

0:00:00 0:15:00 0:30:00 0:45:00 1:00:00 1:15:00 1:30:00 1:45:00 2:00:00 2:15:00

Time (min)

Tem

pera

ture

(C

)

Standard Hot

Standard Cold

ACTR Hot

ACTR Cold

Test 3: Hot PlateTest 3: Hot Plate

Figure 3: Hot Plate Test Results for Standard Drywall and ACTR Wallboard

0

10

20

30

40

50

60

70

80

0:00 0:30 1:00 1:30 2:00 2:30Time (hr:min)

Tem

per

atu

re (

C)

Standard Drywall #1 Standard Drywall #2 Standard Drywall #3

ACTR Wallboard #1 ACTR Wallboard #2 ACTR Wallboard #3

Hot Plate AnalysisHot Plate Analysis

p

p

x

x

p

p

sosi

k

L

k

L

k

LTT

q21

"

)(" siial TTkq

RecommendationsRecommendations Perform test #1 run #1 with aluminum foil and or Perform test #1 run #1 with aluminum foil and or

saran wrap enclosed in duct tape to trap dead air saran wrap enclosed in duct tape to trap dead air space as an insulatorspace as an insulator

When running test #1 use lube to eliminate When running test #1 use lube to eliminate contact resistancecontact resistance

Consider the time it takes to reach steady state, Consider the time it takes to reach steady state, not just what happens at steady statenot just what happens at steady state

Make boxes of the material and fill them with ice Make boxes of the material and fill them with ice to test which one lasts longestto test which one lasts longest

Try different thicknesses of the material and run Try different thicknesses of the material and run it without the paperit without the paper

ConclusionConclusion

ObjectiveObjective

Test 1- Conduction apparatusTest 1- Conduction apparatus

Test 2- Tube TestTest 2- Tube Test

Test 3- Hot PlateTest 3- Hot Plate

RecommendationsRecommendations

ConclusionConclusion