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Table 12 Result of exergy analysis [onion] 4th 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)

\(Ex_{loss}\) (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

0.295

0.395

0.100

289.8

66.01

24.5

37.9

40.1

1.0052

1.00532

3600

0.172

0.220

0.048

124.0

192.0

64.6

72.10

46.6

29.3

36.7

41.1

1.00536

1.00550

7200

0.210

0.301

0.091

119.0

203.3

58.5

56.66

48.4

31.1

42.3

44.8

1.0056

1.00570

10,800

0.889

0.901

0.012

158.2

222.8

71.0

96.65

70.0

32.3

54.6

56.2

1.0060

1.00600

14,400

0.895

1.200

0.305

168.5

188.2

89.5

65.92

59.0

34.9

58.9

63.4

1.0062

1.00630

18,000

1.283

1.416

0.133

199.8

233.7

85.5

89.63

76.6

33.4

62.2

64.9

1.0062

1.00633

21,600

1.161

1.351

0.19

211.8

249.3

84.9

83.63

71.0

31.9

59.2

62.8

1.0061

1.00620

25,200

0.775

0.961

0.186

226.8

307.7

73.7

76.00

56.0

28.9

52.4

56.1

1.0058

1.0060

28,800

0.931

1.150

0.219

170.8

229.7

74.3

76.48

56.8

28.1

52.3

55.2

1.0058

1.00591

32,400

0.698

0.858

0.16

142.4

192.3

74.0

77.07

57.0

27.9

48.8

51.2

1.0057

1.00580

36,000

0.641

0.832

0.191

154.6

228.6

67.6

70.20

47.5

25.9

45.7

47.3

1.0055

1.00560

39,600

0.456

0.615

0.159

187.2

302.5

61.9

65.13

40.3

23.4

40.1

42.9

1.0053

1.00534