Name of the cookers

Von oppen

Box type

Garg type

Four mirror

Code

PRD1

BWM1

BSM 1d

BFF1

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

Direct

0.9x0.9x0.6

0.7

0.1

-

Alu. Foil

4

Bad

Excellent

*

~

250

50

170

2.5

1

9-16

0

Yes

Fair

Complicated

Complicated

Simple

20

Incon.

Bad

*

~

No

5

Exclusively

6

40

-

-

-

4

-

-

-

-

4

1

4

*

~

2

4

3

2

1

3

0

4

3

2

2

3

2

1

1

*

~

4

2

4

4

4

66

-

Absorber

Global

0.6x0.6x0.2

0.1

2

-

Mirror

8

Excellent

Excellent

*

~

100

40

90

4

4

11-15

1

No

O

None

No

-

None

-

Bad

*

~

A little

5

Exclusively

44

2.3

-

-

-

4

-

-

-

-

3

4

4

*

~

0

3

0

3

4

1

2

0

0

0

0

2

2

4

1

*

~

3

2

4

2

0

54

-

Abs.+refl.

Direct

0.6x0.6x0.1

0.4

-

-

Mirror

20

Excellent

Good

*

~

160

50

140

4

4

10-16

1-5

No

No

None

No

Simple

30

None

Bad

*

~

A little

5

Exclusively

25

5.6

-

-

-

4

-

-

-

-

3

4

3

*

~

1

4

2

3

4

2

3

0

0

0

0

3

3

4

1

*

~

3

2

4

3

3

62

-

Abs. + refl.

Direct

0.8x0.8x1.2

0.5

-

8

Mirrors

31

Good

Good

*

~

170

45

250

3

2

10-16

2

Difficult

Difficult

None

No

Simple

30

None

Bad

*

~

Rather

5

Exclusively

44

3.9

-

-

-

4

-

-

-

-

2

3

3

*

~

1

3

4

2

2

2

4

-

0

0

0

3

3

4

1

*

~

1

2

4

2

1

61