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Table 4 Result of exergy analysis 2nd day (tomato)

From: Potential assessment and experimental analysis of solar vegetable dryer: in case of northern Ethiopia

Time (s)

\({\text{Ex}}_{\text{dco}}\) (KJ/kg)

\({\text{Ex}}_{\text{dci}}\) (KJ/kg)

\({\text{Ex}}_{\text{loss}}\) (kJ/kg)

\({\text{Ex}}_{\text{out}}\) (w)

\({\text{Ex}}_{\text{rad}}\) (w)

\(\eta_{{{\text{Ex}}.{\text{solar}}}}\) (%)

\(\eta_{{{\text{Ex}}.{\text{do}}}}\) (%)

\(\eta_{{{\text{Ex}}.{\text{net}}}}\) (%)

Ta (°C)

Tdco (°C)

Tdci (C)

\(\bar{c}_{p}\) (KJ/kg. K)

0

0.243

0.331

0.088

390.00

63.78

22.1

34.2

36.3

1.0051

1.0051

3600

0.481

0.549

0.068

260.1

337.96

76.9

85.86

66.0

24.6

41.8

43

1.0054

1.0054

7200

0.485

0.535

0.05

160.9

234.97

68.5

89.69

61.4

29.5

46.9

47.8

1.0057

1.0057

10,800

0.759

0.878

0.119

125.6

246.99

51.0

84.32

43.0

30.3

52.1

53.8

1.0058

1.0059

14,400

0.571

0.619

0.048

199.8

257.12

77.7

91.59

71.2

29.1

48

48.8

1.0057

1.0059

18,000

1.134

1.210

0.076

119.3

308.14

38.7

93.30

36.9

30.1

57

66.3

1.0060

1.0063

21,600

0.829

0.999

0.17

161.8

307.34

52.6

79.49

41.8

30.9

53.1

55.3

1.0059

1.0060

25,200

0.547

0.662

0.115

208.9

256.22

81.5

78.98

64.4

29.5

48

49.9

1.0057

1.0058

28,800

0.554

0.722

0.177

181.9

204.23

89.1

68.05

60.6

28.5

47.1

49.8

1.0056

1.0057

32,400

0.383

0.438

0.055

121.2

204.40

59.3

85.64

50.8

28.4

43.8

44.9

1.0055

1.0056

36,000

0.380

0.412

0.032

118.4

208.60

56.7

91.58

51.9

28.1

41.2

44.1

1.0055

1.0055

39,600

0.220

0.310

0.09

80.95

177.44

45.6

59.10

26.9

27.5

39.1

41.4

1.0054

1.0055