BRONZE

Solar oven

Our project is to see if we can build a solar powered oven that gets hot enough to melt a s'more in the winter of Calgary.
Connor Wilton Sawyer Bogard
Grade 5

Hypothesis

I think the oven will half cook the smores.

 

Research

Sawyer:

-my estimated time for the oven to be in position is 9:30 to 11:00

-sun is hitting the oven from the south east from us.

-what happened:be in position at 9:30 to 11:00

-started at other position at 11:30 table 2

-look at weather and sun forecast for saturday and sunday

-decided to do experiment inside so we can regulate temperature since Calgary winter is cold and indoors smores wont freeze before sun heats up the oven.

-i'm going to put my smores by a window with direct sunlight. 

 

RESEARCH

-how long can we keep the solar oven hot for

-how much heat can it take

-temperature of room

-how much heat does the smores need to melt

-how much temperature does the oven have

-how to make a smore

-temp on saturday is 2 and sunday is 4 Celsius 

https://desertchica.com/diy-solar-oven-smores-kids-science-experiment/ 

https://weareteachers.com/5th/grade/science/projects/ 

https://en.wikipedia.org/wiki/Solar_energy

-Conversation with my Grandpa on solar power in his home

Chocolate melting temperature is 40 Celsius  https://www.google.com/search?q=chocolate+melting+temperature&oq=chocolate+melting+tem&aqs=chrome.0.0j69i57j0l2j0i22i30l4.5431j0j7&sourceid=chrome&ie=UTF-8

Marshmallow melting temperature is 34 Celsius https://www.google.com/search?q=marshmallow+melting+temperature&oq=marshmallow+melting+temp&aqs=chrome.0.0j69i57j0i22i30j0i390l2.7099j0j7&sourceid=chrome&ie=UTF-8

 

ADDITIONAL RESEARCH AND THOUGHTS

https://www.calgary.ca/cs/iis/solar-panel/solar-energy.html?redirect=/solar#:~:text=With%20an%20average%20of%202%2C396,the%20use%20of%20solar%20energy.   "With an average of 2,396 hours of sunlight each year, Calgary is an ideal city for the use of solar energy."

-This could help with research going forward because one house that uses solar energy can actually help a whole community,  so if you can get your neighbors to do the same, you could eventually help out poorer communities that are close by.

https://www.newscientist.com/article/2229761-can-we-really-save-the-planet-by-making-food-from-air-without-farms/#:~:text=Less%20than%200.5%20per%20cent,efficiency%20of%2020%20per%20cent.  "Less than 0.5 per cent of the light energy falling on a field gets turned into food. By contrast, solar panels convert around 17 per cent of the light energy falling on them into electricitySolar Foods says it can convert electricity into food – via hydrogen – with an efficiency of 20 per cent."  

-This could help with research going forward  because Solar panels could help solve world hunger and not kill as many animals in the process.

 

Variables

Sawyer:

get a good angle of the sun

how long will the oven be in direct sunlight

size of oven 

size of foil and constuction paper on oven

used black constuction paper and shiny side of foil for more light

inside temp

outside temp

cloud cover 

brightnees of sun

constuction of box

constuction and materials and placment of smores

temperature measurement - thermastat for inside, phone weather app for outside, electronic food thermometer for inside of the oven

Procedure

Sawyer:

Build box - used a used pizza box, cut square flap on the top of the box, glued black construction paper on the bottom of the box and the shiny side of tin fil on the underside of the flap to make a dark surface to capture the heat and a reflective surface to reflect the sun.  also glued a piece of saranwrap over the hole to try to keep the heat in.

used two smores.  1 is a graham cracker piece on the bottom, a regular size marshmellow in the middle, and a square of chocolate on the top.  The 2nd is a graham cracker with chocolate in the middle and a marshmellow on top.  

placed smores in the center of the oven

chose a good place where the sun can directly reach the oven

researched hottest and most sunny days and looked at the rooms in my house where the I would do the experiment to decide what times to do the experiment.

started the experiment at 9:30 and finished at 11:30.  this was the time of the direct sun.

recorded data and took pictures

We moved the oven upstairs from 11:30a to 1:30p in direct sunlight to see if we could melt the smores more but the difference in melting wasn't very much.

ate smores

Observations

Sawyer:

The smores with chocolate on top had melted chocolate that melted on top of the marshmello.  The smore with chocolate in the middle didnt really melt.

Nether of the marshmellos cooked or softened with heat.

We had direct sunlight on the oven for about a hour in each spot but we had to change to different tables to have the sun hit directley on the oven.  

There were no clouds on the day of the experiment.   We tried to repeat the experiment the next day but it didn't work because it was too cloudy and their was no directy sun.

We put a metal pan on bottom of the oven to add a layer between the cold marble shelf and the oven to help the smore get hotter 

Both smores look yummy but the melted one looks best

Once the smores were out of the direct sunlight the melting stopped.

Data:

Start time of experiment 9:12a Saturday February 20th on table 1

Moved the over to table 2 at 9:30a for direct sunlight.  Sun is bright and direct

Tempurature at 9:12a is 19.5 Celsius inside the house, outside is 7 Celsius

Tempurature at 11:18a in the oven is 28. Celsius.  Used an electronic thermometer (with pictures)

We moved the oven upstairs from 11:30a to 1:30p in direct sunlight but the difference in melting wasn't very much.

Analysis

On each three days we put the oven in place at 12:pm

on day one corners of the chocolate melted than we moved the oven to the back but there was no more melting

on day two parts of the marshmallow melted so we moved the oven to the back of the house and the melting stopped again

on day three we tried putting the oven out side but nothing happened

Sawyer:

Conclusion

its possible to create a cheap solar oven that does a ok job at melting some ingredets  since i did a smore the only thing that melted was the chocolate if its kept at direct sunlight.

 
Smore melting stages
9:09a start direct sunlight on table 1 Smore 1 with chocolate on top, marshmellow in the middle, graham cracker on the bottom  - no chocolate or marshmellow melt - 0 out of 10 melting Smore 2 with marshmellow on the top, chocolate in the middle, cracker on the bottom - no chocolate or marshmellow melt
9:31a direct sunlight, moved to table 2 a little melting of chocolate on smore 1 - a 2 out of 10 with nothing on the chocolate no melting on smore 2
9:57a direct sunlight on table 2 melting starting on corners of chocolate - a 4 out of 10 melt, nothing visual on marshmellow, feels a little softer no melting of chocolate, marshmellow feels a little softer
11:19a  direct sunlight on table 2 chocolate melted on smore 1 and sticking to saran wrap - an 8 out of 10 melt, nothing visual on marshmellow and still feels a little softer no melting of chocolate, marshmellow still feels a little softer

Conclusion

the smores were half cooked

sawyer:

The chocolate on the smores were able to melt enough to eat if they had direct exposure to winter sunlight for about 2 hours.  The homemade solar oven didn't produce enough heat to melt the marshmellows.  It was cool to see what happened and it is cool that I know how to make a solar oven that can make smores using the winter sun.

Application

i would would apply this if you went camping in the summer

i would apply this because you could try putting something else in it

after experementing at a house on a sunny day i think the solar oven would be good for camping,when powers down,dont have money for a oven if u have direct sun light and its hot out

i think if people could make bigger solar ovens and make them heat up more food then people could have compamys of solar oven brands and more jobs means more health more health means better as a person.

Sources Of Error

Connor:

The sun wasnt as hot it would be in the summer 

there was no black paper that  you are supposed to use

Sawyer:

temperature reading in oven may not have been accurate using an electronic thermometer - also poked a small hole in the saran wrap

solar oven is dependent on direct access to sun which means we had to move the oven a couple of times which could impact the melting

built the solar oven out of materials from what we had at the house - heat may escape

solar oven needs direct sun - we only had 2 potential days to do the experiment in our house

temperature of oven is impacted by heat sources inside the house

Acknowledgement

i thank my partner for finding this website