The Problem
All through the history of life on earth, living things have been depending on the suns energy.
Today we still depend on the suns energy, but also on fossil fuels, nuclear power, energy which comes at a cost. It has left us with a huge challenge: global warming.
We are starting to realize that something must be done. But the question is: do we solve this problem in time?
The Solution
The ZUN solar cooker is not trying to save the world, but to inspire people to a healthier and more environmentally friendly life style. One step at a time and by seeing that the Zun cooker can cook food by using nothing but the suns energy it might make people rethink.
Solar cooking is a fairly new phenomenon. It is not until most recently, the last twenty years in fact, that we have seen greater strides and developments occur in this field.
How it works: A black rock gets hotter lying in the sun than a white rock that is because the black color allows the rock to absorb more of the suns energy, in the form of heat. Put this black rock in a transparent plastic bag and the heat cannot escape and you have made yourself a small solar oven. Add a reflective screen around the rock and bag to capture more sunlight makes the temperature skyrocket.
The functionality of the Zun cooker is based on solar cooking theory and on a homemade prototype which was able to: bake 1 kg of potatoes in 1 hour, hard boil 12 eggs in 30 minutes, and cook approximately 500 g broccoli in about 30 minutes as well and all 3 things without the use of water, the water inside the vegetables is simply enough. The cooking found place at 10 am – 2 pm a cold sunny spring day in Denmark.
I was surprised how well the prototype worked. It convinced me to take the Design to the next level.
My Design Criteria for the product: portable, light weight, easy to use, fun, for both adults and children.
The Zun cooker consists of 2 things, a pot and a sun screen:
• The pot is made of anodized aluminum; the black color is for maximum absorption of the sun’s rays. Around it, a plastic shell to contain the heat inside the system, just like the plastic bag. The plastic shell is made of a PSU (polysulfone) which allows temperatures of 185 degrees Celsius, which is more than enough for food, to be cooked in the pot. The shell is made from injection molding. And the aluminum pot pressed out from a plate of aluminum.
• The sun screen is made in the same materials as the silvery reflector screens you can place inside the windshield of your car. Flexible, durable and good at reflecting.
The 2 circle shaped buttons on the pots side acts as a locking mechanism, press it and the lid can come off and be used as a plate. The locking mechanism helps you avoid spilling your prepared food while transporting it from A to B. The locking mechanism does not make the pot a ticking time bomb, pressure is able to ventilate out through the crack between the lid and the pot. When you want to start cooking your food, you place the sun screen on the ground (with the cooker inside, full of food ready to start cooking, yum yum) and unsnap the strap holding the sun screen together (just like the locking mechanism on an umbrella) and voila the screen unfolds itself and your food starts cooking.
The ZUN cooker is a fun way to cook together with your family and friends and there is many different ways of using the Zun cooker: You can prepare your food at home, put it in the pot and bring it to the festival, picnic, camping trip, at the beach and so on. You can also mix your ingredients on the spot or collect edible things around you to cook. You can for instance collect mushrooms and make a nice soup. Berries or fruit can also be collected and dried. It is really up to ones imagination. ShelleyS Suggests- There needs to be a thermometer/ temperature gauge, to be certain when temperatures are at food safe level.
Key Features
- Solar Powered Food Cooker
- Cook food at places where fire is prohibited
- No loss in your foods nutritional value.
- A low tech product doing high tech stuff.