How solar oven works?

There are hundred of solar oven and solar cookers models. For beginners, it is necessary to know the differences between concentration systems and greenhouse systems. Below, few of the best known models:

Alsol 1.4 Model (concentration):

European Solar Oven Model (greenhouse):

parabolic cooker alsol
Click on image to enlarge
sun oven
Click on image to enlarge
   

Table Model (concentration and greenhouse):

Scheffler Model (concentration):


Click on image to enlarge
Source: Blogsimages.skynet.be

Click on image to enlarge
Source: Solare-bruecke.org

Specifications of solar ovens:

The maximum temperature obtained by a small solar oven equipped with reflectors of a surface of 1m ² is 230°C. The temperature of normal use oscillates within between 140°C and 160°C.

It is generally advisable to use a small brick retaining heat for the days of intermittent cloud and sunshine to keep a constant temperature in the oven, especially when making cakes for which the paste has to rise.

temperature sun oven GSO
Cliquez sur l'image pour l'agrandir

Regarding the barbecue Alsol K14, heat is distributed around the pot and quickly reaches the 200-250°C, all the dishes can be prepared with conventional stoves, including frying. The equivalence in watts is between 600 and 900 depending of the reflectors and sky. Calculations are estimated with equivalence based on the fact that a square meter of land receives between 600 and 1000 watts from the sun during a normal day. Reflectors and drafts absorbing about 40% of solar radiation, we obtain:

0.6 * 800 * (3.14 * (1.4 / 2) ²) = 738.528 watts of average power for a barbecue solar Alsol K14

solar cooking time

Comparison of the cooking time between a solar oven and a conventional oven gas or electric:

A conventional oven thermostat set 6-7 reached 200-220 ° C between 5 and 10 minutes. At this temperature, it is necessary to check it often, but the advantage is that cooking is fast, most often beetwin 30 min to 1 hour.

As shown in the chart above, a small solar oven like the Global Sun Oven reaches its useful temperature in 30 min: 150°C. Once at 150°C, if you place a baking dish, the temperature stay stable. The cooking is slow, the advantage is that its preserve properties of food but also you can forget the cake during a laps of time. For the same recipe, it usually takes 2-3 times longer with a solar oven as showed on the table on the left. Discover also solar grill oven made by Idcook.

Solar cooking accessories :

solar cooking material

Foot English
 

Solar Cooking Atlas comments :

Laura: Congratulation for your great invention, I'm Laura and I would like to know how to make or find a solar oven for my father, he is a cooker chef and we are living in Dominican Republic so I think we can really use it in my tropical country! I'm also interested to resell solar products... I think people can really be surprised here!

Clement: Interesting. I've downloaded a lot of documents on your site about solar cookers. I am attending the institute higher rural development in South Kivu in the DRC. Really I will share this information with students. Good luck for the job!

Paul : Solar Household Energy is a leading nonprofit organization that conducts research, field projects and outreach programs for solar cooking (see solar cooking pictures here). Located in the Washington, DC area, USA. You can visit our website she-inc.org to get more information.

Orlando : Hello, I work in the Applied Renewable Energy Group GERA www.gera.uo.edu.cu we have some models of solar cookers, we would like to contact with others people that like the solar cooker, thank you vey much.

Romain : Hi , thanks for your comment, if you know other solar cooking recipes you can send it to me, I can share it to the recipe page!

Michael : Thanks for your solar tips ;)

Emily : A great alternative for a lot of people to wood or gas! Good job!

Alice: I tryed your peas recipe with my sun oven, I just backed first the bacon and onions with my solar cooker because I think it fries better and faster than my oven, it was delicious ;)

Add a comment

CO2 Data

Eco-responsibility:

Experts say that 350 parts per million of CO2 in the atmosphere is the maximum acceptable for humanity.

The Solar Cooking Atlas offsetting Co2 emissions caused by hosting the site and visits generated.

© Copyright
Solar Cooking Atlas
:

Any even partial reproduction of content is prohibited without permission.