solar13.htm

TABLE 2. ( II Part ) Evaluation of solar cookers according to characteristics

Name of the cookers Steam cooker   Indoor steam   Sobaco   Chinese  
Code used in this review IDT1   IDT4   PC 3   PRA 2  
Construction----------------

Principle

Radiation

Dimension

Aperture (m3)

Focal length

Intensification factor

Reflector material

Weight (kg)

Stability

Portaility

*****

Efficiency

Effective power (w)

Degree of efficiency

Max. temperature (oC)

Cooking cap. (Kg)

Number of pots

Cooking hrs. (Hrs)

Keeping warm (hrs)

Roasting?

Baking?

Access to food ?

Stirring?

Repositioning?

How often?

Stray light

General handling

*****

Production

Complicated?

Duration (years)

Local materials

Costs (US $)

Power costs (w/US%)

Total

-

Reflector

Global

1.5x1x1.4

0.8

-

-

Cr-Ni-steel

60

Good

Very bad

*

~

150

21

100

4

2

9-17

1

No

No

Complicated

Complicated

Very simple

120

None

Good

*

~

Rather

7

Exclusively

62

2.4

-

-

-

2

-

-

-

-

0

3

0

*

~

1

1

1

3

2

4

2

-

0

1

1

4

4

4

3

*

~

1

2

4

1

0

48

-

Reflector

Global

3x1.5x1.5

3.6

-

-

Pol. Alu

-

Fixed

Excellent

*

~

470

14

100

6

2

10-16

1

No

No

Yes

Yes

-

-

None

Excellent

*

~

Rather

10

Exclusively

150

3.1

-

-

-

2

-

-

-

-

2

4

0

*

~

4

0

1

4

2

2

2

-

0

4

4

2

4

4

4

*

~

1

4

4

0

1

57

-

Reflector

Direct

2.5x1.8x2

1.7

-

-

-

70

Good

Very bad

*

~

370

28

180

5

2, special

8-16

0.5

Yes

Yes

Complicated

Difficult

Simple

10

Slight

Bad

*

~

Yes

10

Mostly

300

1.2

-

-

-

0

2

-

-

-

0

3

0

*

~

4

1

4

4

1

4

1

4

4

1

0

3

0

3

1

*

~

0

4

3

0

0

48

-

Reflector

Direct

1.8x1.6x1

-

-

-

-

100

Excellent

Very bad

*

~

560

36

180

5

2

9-17

0

Yes

No

Yes

Yes

Complicated

15

Incon.

Good

*

~

Rather

10

Exclusively

70

8

-

-

-

3

-

-

-

-

0

4

0

*

~

4

2

4

4

2

4

0

4

0

4

4

1

1

1

3

*

~

1

4

4

0

3

60

Source. GATE (1979)

Note. The cookers delivering 370, 470, and 570 W of output are getting the same marks, while only the four mirror model is shown to develop 250oC. This may be due to the fact that in Sobaco and Chinese types the cooking vessels were exposed to wind; better results could be obtained it they are enclosed as suggested.

Source:- TIDE., March 1998, 8-1, pp 1-37, For Comments, suggestions,contributions contact < arkundapur@yahoo.com>

Dr Paul A Funk et.al., have formulated another set of parameters for testing solar cookers the details could be found if you click here


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