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Table 4 ANOVA results of output characteristics of a V-grooved absorber plate

From: Multi-thermal performance optimization of semi-circular heat pipes integrated with various solar collector profiles

Source

DF

Heat output

Thermal resistance

Overall thermal efficiency

Adj SS

Adj MS

F value

p value

Adj SS

Adj MS

F value

p value

Adj SS

Adj MS

F value

P value

Model

6

23,948.4

3421.2

36.28

0.000

0.025560

0.003651

38.44

0.000

142.411

20.344

3.72

0.011

Linear

3

23,573.2

7857.7

83.33

0.000

0.025082

0.008361

88.01

0.000

132.546

44.182

8.07

0.001

A

1

20,995.4

20,995.4

222.66

0.000

0.025003

0.025003

263.18

0.000

2.985

2.985

0.55

0.469

B

1

514.3

514.3

5.45

0.031

0.000011

0.000011

0.11

0.741

22.418

22.418

4.10

0.057

C

1

2063.5

2063.5

21.88

0.000

0.000068

0.000068

0.72

0.407

107.143

107.143

19.58

0.000

Square

1

26.8

26.8

0.28

0.600

0.000003

0.000003

0.04

0.852

0.298

0.298

0.05

0.818

C*C

1

26.8

26.8

0.28

0.600

0.000003

0.000003

0.04

0.852

0.298

0.298

0.05

0.818

2-Way interaction

3

348.4

116.1

1.23

0.326

0.000475

0.000158

1.67

0.208

9.566

3.189

0.58

0.634

A*B

1

347.3

347.3

3.68

0.070

0.000064

0.000064

0.67

0.422

5.039

5.039

0.92

0.349

A*C

1

1.1

1.1

0.01

0.917

0.000411

0.000411

4.32

0.051

4.528

4.528

0.83

0.374

B*C

1

0.0

0.0

0.00

1.000

0.000000

0.000000

0.00

0.958

0.000

0.000

0.00

1.000

Error

20

1791.5

94.3

  

0.001805

0.000095

  

103.960

5.472

  

Total

26

25,739.9

   

0.027365

   

246.370

   
  1. R2 = 96.01%
  2. R2 (adjusted) = 93%
  3. R2 (predicted) = 91%