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Table 5 Result of exergy analysis 3rd 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)

\({\text{Ex}}_{\text{dci}}\) (J/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

0.221

0.280

0.059

387.1

73.30

21.3

32.8

34.5

1.005

1.005

3600

0.340

0.470

0.130

182.6

265.7

68.72

61.76

42.4

24.1

38.9

41.1

1.0053

1.0053

7200

0.378

0.421

0.043

163.7

279.5

58.6

88.62

51.9

27.6

42.9

43.8

1.0055

1.0055

10,800

0.903

1.040

0.138

137.1

242.7

56.5

84.72

47.8

32.2

56.2

58.1

1.006

1.0061

14,400

0.974

1.012

0.038

130.6

236.5

55.2

96.10

53.0

33.1

58.1

58.9

1.0061

1.0061

18,000

0.838

0.962

0.124

139.7

263.9

52.9

85.20

45.1

32

55.1

56.8

1.0060

1.0060

21,600

1.960

1.981

0.021

160.9

181.5

88.7

96.93

87.74

36.1

72.1

72.3

1.0066

1.0066

25,200

1.762

1.880

0.118

173.2

200.0

86.6

93.30

80.8

34.8

68.8

70

1.0065

1.0065

28,800

1.162

1.253

0.091

112.3

171.4

65.5

92.17

60.4

31.8

59.1

60.2

1.0061

1.0061

32,400

0.714

0.931

0.217

95.41

178.1

53.6

69.61

37.3

29.6

50.8

53.9

1.0058

1.0059

36,000

0.561

0.680

0.119

150.3

176.5

85.1

78.79

67.1

28.5

47.2

49.2

1.0056

1.0057

39,600

0.480

0.632

0.152

165.3

199.1

83.0

68.33

56.7

27.1

44.3

47.1

1.0055

1.0056