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[[Image:Fun-Panel_45_degree_view.jpg|left|320px]]
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[[Image:Fun-Panel 45 degree view.jpg|left|320px]]
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The '''Fun-Panel''' solar panel cooker can be built in 1-2 hours from a single [[cardboard]] box, [[Reflective material|aluminum foil]], a [[pot]], and an [[oven bag]]. This is significant, because traditional solar panel cookers such as the [[CooKit]] often require a large sheet of cardboard for construction. The Fun-Panel can also be adjusted more easily for different sun angles. This very powerful cooker is a true breakthough.
 
The '''Fun-Panel''' solar panel cooker can be built in 1-2 hours from a single [[cardboard]] box, [[Reflective material|aluminum foil]], a [[pot]], and an [[oven bag]]. This is significant, because traditional solar panel cookers such as the [[CooKit]] often require a large sheet of cardboard for construction. The Fun-Panel can also be adjusted more easily for different sun angles. This very powerful cooker is a true breakthough.
   
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This is a very good design to build in construction workshops. Please see [[Media:Fun-Panel class handout.pdf|Fun-Panel Class Handout]].
 
This is a very good design to build in construction workshops. Please see [[Media:Fun-Panel class handout.pdf|Fun-Panel Class Handout]].
   
''[Note that Teong Tan has recently released an improved design for this cooker. To see the updated design, see [http://images2.wikia.nocookie.net/__cb20080804044346/solarcooking/images/9/9c/Fun-Panel2_Instructions.pdf Fun-Panel 2 Construction Plans]].''
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''[Note that Teong Tan has recently released an improved design for this cooker. To see the updated design, see [http://images2.wikia.nocookie.net/__cb20080804044346/solarcooking/images/9/9c/Fun-Panel2_Instructions.pdf Fun-Panel 2 Construction Plans].''
 
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__TOC__
 
__TOC__
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==Building the Cooker==
 
==Building the Cooker==
 
===What You Will Need===
 
===What You Will Need===
[[Image:Fun-Panel_Fig-1.jpg|350px|right]]
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[[Image:Fun-Panel Fig-1.jpg|350px|right]]
 
The construction materials required for a Fun-Panel cooker are simple and low cost. Teong made his cooker from a used cardboard box that measured about 50 cm (20 in) on all edges. If you use a box with different dimensions, just modify the design to suit your box. One cube-shaped cardboard box has enough material for two Fun-Panel cookers. If only a rectangular-shaped box is available, you can cut the side panel to make it square.
 
The construction materials required for a Fun-Panel cooker are simple and low cost. Teong made his cooker from a used cardboard box that measured about 50 cm (20 in) on all edges. If you use a box with different dimensions, just modify the design to suit your box. One cube-shaped cardboard box has enough material for two Fun-Panel cookers. If only a rectangular-shaped box is available, you can cut the side panel to make it square.
 
* A [[cardboard]] box
 
* A [[cardboard]] box
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===Creating the Panels===
 
===Creating the Panels===
 
* Cut the cube-shaped cardboard box to obtain two large rectangular panels. Each panel is made up of one square face of the box together with one flap.
 
* Cut the cube-shaped cardboard box to obtain two large rectangular panels. Each panel is made up of one square face of the box together with one flap.
* Draw all the fold lines at 15° angles (see [[User_blog:Katjo.Mencanto/Fun-Panelo:_Grada_Mezuroj_por_Maldiligentuloj_/_Fun-Panel:_Measuring_Degrees_for_Lazy_People#Fun-Panel:_Degree_Measurements_for_Lazy_People|a simple way to measure 15°]].) and cut lines onto the panels following the Modified Fun-Panel Plan.
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* Draw all the fold lines at 15° angles (see [[User blog:Katjo.Mencanto/Fun-Panelo: Grada Mezuroj por Maldiligentuloj / Fun-Panel: Measuring Degrees for Lazy People#Fun-Panel: Degree Measurements for Lazy People|a simple way to measure 15°]].) and cut lines onto the panels following the Modified Fun-Panel Plan.
 
* Cut along the cut lines, then fold along the fold lines.
 
* Cut along the cut lines, then fold along the fold lines.
 
* Glue aluminum foil onto the inner side of the two large rectangular cardboard panels. Mix equal amounts of white glue and water. [[Wheat paste]] can also be used. For more information see [[Glue]].
 
* Glue aluminum foil onto the inner side of the two large rectangular cardboard panels. Mix equal amounts of white glue and water. [[Wheat paste]] can also be used. For more information see [[Glue]].
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[[Image:Fun-Panel_Fig_2.jpg|none|500px]]
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[[Image:Fun-Panel Fig 2.jpg|none|500px]]
   
 
==Adding small cardboard support==
 
==Adding small cardboard support==
[[Image:Fun-Panel_Fig_3.jpg|none|380px]]
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[[Image:Fun-Panel Fig 3.jpg|none|380px]]
   
 
==Setting up the Cooker==
 
==Setting up the Cooker==
 
===Low sun angle===
 
===Low sun angle===
[[Image:Fun-Panel_Fig_4.jpg|left|200px]]
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[[Image:Fun-Panel Fig 4.jpg|left|200px]]
   
 
For low sun angle cooking, between 35 and 50 degrees, place the cooker down, with the rectangular panel on the floor, as shown in Figure 4. For very low sun angle cooking, below 35 degrees, raise the pot by 5 to 7.5 cm (2 to 3 inches) above the base to better capture the sunlight.
 
For low sun angle cooking, between 35 and 50 degrees, place the cooker down, with the rectangular panel on the floor, as shown in Figure 4. For very low sun angle cooking, below 35 degrees, raise the pot by 5 to 7.5 cm (2 to 3 inches) above the base to better capture the sunlight.
   
 
===High sun angle===
 
===High sun angle===
[[Image:Fun-Panel_Fig_5.jpg|right|200px]]
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[[Image:Fun-Panel Fig 5.jpg|right|200px]]
 
With rising sun angle, between 50 and 70 degrees, flip the cooker around so that the square panel in the middle of the cooker is now horizontal, and place the cooker on top of a small box. (A box 12-15 cm, or 5-6 inches high, is now required.) See Figure 5.
 
With rising sun angle, between 50 and 70 degrees, flip the cooker around so that the square panel in the middle of the cooker is now horizontal, and place the cooker on top of a small box. (A box 12-15 cm, or 5-6 inches high, is now required.) See Figure 5.
   
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To cook, put foods inside a [[Pots|suitable cooking pot]]. Enclose the pot in a [[Plastic bags|oven cooking bag]]. Use an oven cooking bag alone or a normal plastic bag around a wire frame to keep the pot from touching the bag (to avoid melting the bag). Set the cooker according to the sun angle, and face it towards the sun. Place the cooking pot in the cooker and start cooking.
 
To cook, put foods inside a [[Pots|suitable cooking pot]]. Enclose the pot in a [[Plastic bags|oven cooking bag]]. Use an oven cooking bag alone or a normal plastic bag around a wire frame to keep the pot from touching the bag (to avoid melting the bag). Set the cooker according to the sun angle, and face it towards the sun. Place the cooking pot in the cooker and start cooking.
   
[[Image:Fun-Panel_with_plastic_bag.jpg|right|thumb|130px|Photo of Fun-Panel showing pot inside plastic bag]]
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[[Image:Fun-Panel with plastic bag.jpg|right|thumb|130px|Photo of Fun-Panel showing pot inside plastic bag]]
 
The Fun-Panel cooker is also capable of cooking without the plastic bag enclosure if you have good sunshine. A test in Singapore without the use of a bag recorded a maximum empty pot temperature of 130 °C (266 °F). The 4-liter pot used had a clear glass lid. The cooker was set to the high-sun angle setting, and the sun's angle was 55 degrees when the temperature was taken.
 
The Fun-Panel cooker is also capable of cooking without the plastic bag enclosure if you have good sunshine. A test in Singapore without the use of a bag recorded a maximum empty pot temperature of 130 °C (266 °F). The 4-liter pot used had a clear glass lid. The cooker was set to the high-sun angle setting, and the sun's angle was 55 degrees when the temperature was taken.
   
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===Panel stability===
 
===Panel stability===
 
Some users have found positioning the reflector can be helped by attaching a string between the upper corners.
 
Some users have found positioning the reflector can be helped by attaching a string between the upper corners.
[[File:Fun_Panel_tension_support.jpg|right|350px]]
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[[File:Fun Panel tension support.jpg|right|350px]]
 
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==Cement Variation==
 
==Cement Variation==
 
[[File:DSC02220.jpg|thumb|350px|Cement Fun-Panels]]
 
[[File:DSC02220.jpg|thumb|350px|Cement Fun-Panels]]
In 2009 [[Celestino Ruivo]] developed a Fun-Panel in conrete using mirrors for reflecting the sun rays to the pot. To make the green house effect he used two recycled windows of clothes-washing machines instead of a plastic bag. This model is working now during winter time, no problem with rain and wind, it is easy to clean and it is very heavy and thus theft-resistant. The funnel solar cooker in concrete with mirror can be a good alternative to a more durable solar cooker (many years) instead of some months of a solar [[CooKit]]. In African countries, this kind of solar cooker may also be constructed locally.
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In 2009 [[Celestino Ruivo]] developed a Fun-Panel in concrete using mirrors for reflecting the sun rays to the pot. To make the green house effect he used two recycled windows of clothes-washing machines instead of a plastic bag. This model is working now during winter time, no problem with rain and wind, it is easy to clean and it is very heavy and thus theft-resistant. The funnel solar cooker in concrete with mirror can be a good alternative to a more durable solar cooker (many years) instead of some months of a solar [[CooKit]]. In African countries, this kind of solar cooker may also be constructed locally.
   
 
==Making the Fun-Panel Collapsible (Optional)==
 
==Making the Fun-Panel Collapsible (Optional)==
 
[[Image:Foldable Fun-Panel Cooker.jpg|650px]]
 
[[Image:Foldable Fun-Panel Cooker.jpg|650px]]
 
[[Image:Fun-Panel with Locking Flap.jpg|350px]]
 
[[Image:Fun-Panel with Locking Flap.jpg|350px]]
[[Image:Fun-Panel_Fully_Collapsed_1.jpg|thumb|450px|right]]
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[[Image:Fun-Panel Fully Collapsed 1.jpg|thumb|450px|right]]
 
[[Image:Fun-Panel with Locking Flap 4.jpg|350px]]
 
[[Image:Fun-Panel with Locking Flap 4.jpg|350px]]
[[Image:Back_angle.JPG|thumb|314px|fun-panel cooker with plastic velcro flaps instead of interlocking cardboard]]
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[[Image:Back angle.JPG|thumb|314px|fun-panel cooker with plastic velcro flaps instead of interlocking cardboard]]
   
 
==Fun-Panel Version 2==
 
==Fun-Panel Version 2==
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==Audio and video==
 
==Audio and video==
[[Video:Tom Sponheim at Sustainable NE Seattle's Solar Cookout|thumb|400px|left|[[Tom Sponheim]], a long-time advocate of solar cooking, discusses the [[Fun Panel]] cooker.]]
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[[File:Tom Sponheim at Sustainable NE Seattle's Solar Cookout|thumb|400px|left|[[Tom Sponheim]], a long-time advocate of solar cooking, discusses the [[Fun Panel]] cooker.]]
[[Video:Boiling water with cardboard and aluminum foil 2|thumb|400px|left|A similar design to the [[Fun Panel]] demonstrating its ability to boil water.]]
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[[File:Boiling water with cardboard and aluminum foil 2|thumb|400px|left|A similar design to the [[Fun Panel]] demonstrating its ability to boil water.]]
 
{{clr}}
 
{{clr}}
   
 
==See also==
 
==See also==
*[[Media:Fun-Panel_class_handout.pdf|Fun-Panel class handout]]
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*[[Media:Fun-Panel class handout.pdf|Fun-Panel class handout]]
   
 
==External links==
 
==External links==

Latest revision as of 17:40, November 3, 2014

Last updated: 26 July 2013      
Fun-Panel 45 degree view

The Fun-Panel solar panel cooker can be built in 1-2 hours from a single cardboard box, aluminum foil, a pot, and an oven bag. This is significant, because traditional solar panel cookers such as the CooKit often require a large sheet of cardboard for construction. The Fun-Panel can also be adjusted more easily for different sun angles. This very powerful cooker is a true breakthough.

Teong Tan's rationale for designing this cooker is the following: The Funnel solar cooker is very efficient in capturing sunlight with its 60° conical reflecting surface. However, it has an unstable shape that makes it difficult to keep the cooker and the pot in position. Also it is not possible to fit a regular size cooking pot into a regular size Funnel cooker because of limited space at the lower end of the cooker. The Fun-Panel retains the very efficient conical reflecting surface of the funner cooker but eliminates its disadvantages.

This is a very good design to build in construction workshops. Please see Fun-Panel Class Handout.

[Note that Teong Tan has recently released an improved design for this cooker. To see the updated design, see Fun-Panel 2 Construction Plans.

AdvantagesEdit

  • It's easy to figure out how to cut and fold this cooker using the cardboard from half of a single box -- you don't need a big sheet of perfect cardboard. Every US Post Office sells a large cube-shaped box 50 cm x 50 cm x 50 cm (20 in x 20 in x 20 in) for about $6.00 that can be used to make two Fun-Panels.
  • All cuts are 90° cuts -- no curves.
  • It is easily scaled to the size of cardboard box you have on hand.
  • You can cook at all sun angles including low sun angles (morning and evening or high/low latitudes)

Building the CookerEdit

What You Will NeedEdit

Fun-Panel Fig-1

The construction materials required for a Fun-Panel cooker are simple and low cost. Teong made his cooker from a used cardboard box that measured about 50 cm (20 in) on all edges. If you use a box with different dimensions, just modify the design to suit your box. One cube-shaped cardboard box has enough material for two Fun-Panel cookers. If only a rectangular-shaped box is available, you can cut the side panel to make it square.

Creating the PanelsEdit

  • Cut the cube-shaped cardboard box to obtain two large rectangular panels. Each panel is made up of one square face of the box together with one flap.
  • Draw all the fold lines at 15° angles (see a simple way to measure 15°.) and cut lines onto the panels following the Modified Fun-Panel Plan.
  • Cut along the cut lines, then fold along the fold lines.
  • Glue aluminum foil onto the inner side of the two large rectangular cardboard panels. Mix equal amounts of white glue and water. Wheat paste can also be used. For more information see Glue.


Assembling the PanelsEdit

  • Join the two large rectangular cardboard panels together according to Figure 2, to form the cooker.


Fun-Panel Fig 2

Adding small cardboard supportEdit

Fun-Panel Fig 3

Setting up the CookerEdit

Low sun angleEdit

Fun-Panel Fig 4

For low sun angle cooking, between 35 and 50 degrees, place the cooker down, with the rectangular panel on the floor, as shown in Figure 4. For very low sun angle cooking, below 35 degrees, raise the pot by 5 to 7.5 cm (2 to 3 inches) above the base to better capture the sunlight.

High sun angleEdit

Fun-Panel Fig 5

With rising sun angle, between 50 and 70 degrees, flip the cooker around so that the square panel in the middle of the cooker is now horizontal, and place the cooker on top of a small box. (A box 12-15 cm, or 5-6 inches high, is now required.) See Figure 5.

The small box serves to support both the cooker and the cooking pot in this high sun angle setting. For very high sun angle cooking, above 70 degrees, tilt the vertical, rectangular panels slightly backward until the pot receives maximum reflected sunlight. Tie the two ends of the string together to hold the rectangular panel in that position.

The pot and plastic bagEdit

Ovenbagbox

To cook, put foods inside a suitable cooking pot. Enclose the pot in a oven cooking bag. Use an oven cooking bag alone or a normal plastic bag around a wire frame to keep the pot from touching the bag (to avoid melting the bag). Set the cooker according to the sun angle, and face it towards the sun. Place the cooking pot in the cooker and start cooking.

Fun-Panel with plastic bag

Photo of Fun-Panel showing pot inside plastic bag

The Fun-Panel cooker is also capable of cooking without the plastic bag enclosure if you have good sunshine. A test in Singapore without the use of a bag recorded a maximum empty pot temperature of 130 °C (266 °F). The 4-liter pot used had a clear glass lid. The cooker was set to the high-sun angle setting, and the sun's angle was 55 degrees when the temperature was taken.

Wind stabilityEdit

A large rock can be placed on the back shelf to help stop the cooker from blowing away on windy days. If more wind stability is needed, tie a string to each upper corner of the reflector wings (~5 cm, or 2 inches, in from each edge.) Then tie the strings to stakes in the ground or heavy objects such as a rocks, bricks, etc.

Panel stabilityEdit

Some users have found positioning the reflector can be helped by attaching a string between the upper corners.

Fun Panel tension support


Cement VariationEdit

DSC02220

Cement Fun-Panels

In 2009 Celestino Ruivo developed a Fun-Panel in concrete using mirrors for reflecting the sun rays to the pot. To make the green house effect he used two recycled windows of clothes-washing machines instead of a plastic bag. This model is working now during winter time, no problem with rain and wind, it is easy to clean and it is very heavy and thus theft-resistant. The funnel solar cooker in concrete with mirror can be a good alternative to a more durable solar cooker (many years) instead of some months of a solar CooKit. In African countries, this kind of solar cooker may also be constructed locally.

Making the Fun-Panel Collapsible (Optional)Edit

Foldable Fun-Panel Cooker Fun-Panel with Locking Flap

Fun-Panel Fully Collapsed 1

Fun-Panel with Locking Flap 4

Back angle

fun-panel cooker with plastic velcro flaps instead of interlocking cardboard

Fun-Panel Version 2Edit

Audio and videoEdit

Tom Sponheim at Sustainable NE Seattle's Solar Cookout03:13

Tom Sponheim at Sustainable NE Seattle's Solar Cookout

Tom Sponheim, a long-time advocate of solar cooking, discusses the Fun Panel cooker.

Boiling water with cardboard and aluminum foil 200:48

Boiling water with cardboard and aluminum foil 2

A similar design to the Fun Panel demonstrating its ability to boil water.


See alsoEdit

External linksEdit

See this article in our foreign language wikisEdit

  • Voyez cet article dans le wiki en français: Fun-Panel
  • Vea este artículo en el wiki en español: Fun-Panel

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