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Table 11 Result of exergy analysis [onion] 3rd day

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)

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

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

\(\eta_{{{\text{Ex}}.{\text{net}}}}\) (°C)

Ta (°C)

Tdco (°C)

Tdci (°C)

\(\bar{c}_{p}\)(KJ/kg K)

0

0.265

0.382

0.117

297.4

55.85

24.5

37.2

39.8

1.0052

1.0053

3600

0.184

0.261

0.077

126.2

225.2

56.0

58.15

32.6

27.5

38.1

40.2

1.0053

1.0054

7200

0.321

0.414

0.093

171.8

214.5

80.1

70.92

56.8

29.1

43.2

45.2

1.0055

1.00561

10,800

0.347

0.432

0.085

132.6

171.1

77.5

75.51

58.5

35.1

49.9

52.1

1.0059

1.0060

14,400

0.914

0.959

0.045

137.4

178.9

76.8

95.10

73.1

36.1

50.7

53.2

1.0060

1.0061

18,000

0.762

0.931

0.169

861.5

1084.

79.4

77.82

61.8

37.9

60.1

63.3

1.0063

1.0065

21,600

0.843

1.068

0.225

145.8

185.9

78.4

73.31

57.5

35.7

59.0

62.1

1.0062

1.0063

25,200

0.816

1.038

0.222

145.6

188.9

77.1

72.79

56.1

35.3

58.2

61.3

1.0063

1.0063

28,800

0.349

0.538

0.189

137.1

207.8

66.0

45.84

30.3

29.4

44.1

47.8

1.0056

1.0057

32,400

0.399

0.576

0.177

157.4

217.8

72.3

55.63

40.2

27.5

43.2

46.5

1.0055

1.0056

36,000

0.291

0.381

0.090

175.8

221.4

79.4

69.10

54.9

26.3

38.1

41.7

1.0053

1.0054

39,600

0.234

0.326

0.092

217.3

271.2

80.1

60.68

48.6

24.2

36.1

39.2

1.0052

1.0053