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Energy turnaround, alternative energy

Solar energy: The sun cooker 02: The box cooker (the sun box): Box + glass plate + mirror

Keywords: box cooker, sun cooker, solar oven, solar cooker etc.
Sun is for cooking - FOR FREE!!! - up to 3 pots at the same time!!!


The sun box is standing in the
                sun with a glass pane and reflector   The sun
                box is a heat trap, scheme   The big box cooker 01
                (140ºC)
The sun box is standing in the sun with a glass pane and reflector [1] - The sun box is a heat trap, scheme [3] - The big box cooker 01 (140ºC) [29]
Solar cooker for Zimbabwe with
                the open aluminum reflector (130ºC)    The
                solar oven is complete (179ºC)    In a short
                time the termometer in the solar oven is at 360º
                Fahrenheit (162º Celsius)
Solar cooker for Zimbabwe with the open aluminum reflector (130ºC) [37] - The solar oven is complete (179ºC) [86] - In a short time the termometer in the solar oven is at 360º Fahrenheit (162º Celsius) [53]

by Michael Palomino (2020)

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The sun box (the box cooker): box with styrofoam + black paper + glass pane + aluminum foil reflector

Video: How to make a simple solar cooker to understand the use of solar energy (3'54'')


The sun box
                          is standing in the sun with a glass pane and
                          reflector  
The sun box is standing in the sun with a glass pane and reflector [1]  - Video: How to make a simple solar cooker to understand the use of solar energy (3'54'')
https://www.youtube.com/watch?v=v5CdNH3sQT0 - YouTube channel: Brainergiser - installed on June 1, 2014


Sun cooker: the difference between sun box and parabolic mirror

There are different types of sun cookers: Type 1: The box type - acts like a heat trap - Type 2: The parabolic type - concentrates heat in a single place (13 ''). With type 1 (box type), the sunlight is reflected into the box and heats the saucepan (25 ''). With type 2 (parabolic type) the solar radiation is deflected to a certain point where the saucepan is (40 '').

The types for
                  solar energy: The types of the sun box and the
                  parabolic types   Solar kitchen: The sun box is a heat
                  trap, scheme   Solar kitchen: With the parabolic type, the heat
                  is concentrated on a single point, scheme
The types for solar energy: The types of the sun box and the parabolic types [2] - The sun box is a heat trap, scheme [3] - With the parabolic type, the heat is concentrated on a single point, scheme [4]

The construction of a sun box: cardboard box - styrofoam - black paper - aluminum - glass plate

You take a normal cardboard box and install styrofoam as insulation and black paper on the floor to get the maximum amount of heat (57 ''). The 4 side walls are lined with styrofoam and aluminum: you cut the styrofoam and glue it with aluminum kitchen foil (1'35 '').

You take a cardboard box   You cut
                  a styrofoam for the floor   On the styrofoam floor is glued black paper   The
                  styrofoam side parts are coated with glue and being
                  glued with aluminum foil 01
You take a cardboard box [5] - You cut a styrofoam for the floor [6] - On the styrofoam floor is glued black paper [7] - The styrofoam side parts are coated with glue and being glued with aluminum foil 01 [8]
The styrofoam
                  side parts are coated with glue and glued with
                  aluminum foil 2   The styrofoam
                  side parts are coated with glue and glued with
                  aluminum foil 3   The back is folded well and
                  fastened with some adhesive tape   The styrofoam side parts with aluminum
                  foil are ready
The styrofoam side parts are coated with glue and glued with aluminum foil 2,3 [9,10] - The back is folded well and fastened with some adhesive tape [11] - The styrofoam side parts with aluminum foil are ready [12]

Then the elements are glued into the box, first the bottom, then the side walls (1'46 '').

Glue is spread on the bottom of the box   The styrofoam base is glued to the
                  bottom of the box   Glue is applied to the styrofoam side panels   The sun box is
                  fully lined
Glue is spread on the bottom of the box [13] - The styrofoam base is glued to the bottom of the box [14] - Glue is applied to the styrofoam side panels [15] - The sun box is fully lined [16]
[Is seems strange: The color of the bottom should be BLACK and not blue].

Then the lid parts of the box are cut away, 5cm remain on one side, and a glass plate is now glued on as a lid (2'8 '').

[The movie speaker indicates 2cm, this seems a wrong estimation to me].

The lid parts are cut off, about 5cm
                  remain on one side   Now the glass
                  plate is on it as a lid   The glass plate is fastened with
                  adhesive tape and strong glue   So the glass plate can be easily opened and
                  closed
The lid parts are cut off, about 5cm remain on one side [17] - Now the glass plate is on it as a lid [18] - The glass plate is fastened with adhesive tape and strong glue [19] - So the glass plate can be easily opened and closed [20]

Now the cardboard reflector is prepared, aluminum foil is glued on it and glued to the cardboard box as a second lid (2'32 ''). The joint is reinforced with stron brown parcel adhesive tape (2'46 ''). When cooking, this aluminum lid is opened and a certain angle is installed with a wire so that the sunlight is reflected in the box (3'3 '').

Build
                  reflector 01: glue on it   build reflector 02: aluminum foil is glued on
                  it   the reflector is attached to the solar box   the reflector is glued to the solar box 01
Build reflector 01: glue on it [21] - build reflector 02: aluminum foil is glued on it [22] - the reflector is attached to the solar box [23] - the reflector is glued to the solar box 01: glue on it [24]

Cooking with the solar box from Brainergiser: Fried egg is ready in 30 minutes (3'47'').

The reflector's angle is fixed with a wire   Now fried egg
                  is cooked 1   Now fried egg
                  is cooked 2   Now fried egg is cooked 3, cooking time
                  30 minutes
The reflector's angle is fixed with a wire [25] - Now fried egg is cooked 1,2,3, cooking time 30 minutes [26,27,28]

[Supplement: With black pots cooking in solar cookers comes out faster].

========

The sun box (box cooker) made of solid aluminum, well insulated, double glass plate, with mirror: 140ºC

Video: Solar cooking with Michael Bonke (4'30'')
(original German: Solar kochen mit Michael Bonke)


Video: Solar kochen mit Michael Bonke (4'30'')
https://www.youtube.com/watch?v=2kVkt3on16M - YouTube channel: FidelKastrat - installed on Aug.12, 2013


The minutes: Cooking of a big menue at 140ºC

The big box cooker 01   The big box cooker
                  02 with pots (stainless steel) with food for cooking   The
                  big box cooker 03 while cooking
The big box cooker 01 [29] - The big box cooker 02 with pots (stainless steel) with food for cooking [30] - The big box cooker 03 while cooking [31]

The box cooker is very well insulated, has a double glass lid and a mirror for additional reflection and the ground is black (2'2 ''). The coming light is converted into heat and the heat is retained (2'12 ''). The interior does not cool down as quickly and you can also cook in changing sunshine (2'18 '').

The big box cooker 04
                  reaches 140 degrees Celsius while cooking   The
                  parabolic mirror cooks fast but only 1 pot and must be
                  readjusted every 25-25 minutes  
The big box cooker 04 reaches 140 degrees Celsius while cooking [32] - The parabolic mirror cooks fast but only 1 pot and must be readjusted every 25-25 minutes [33]

Parabolic mirror cooker has to be realigned every 20-25min. - the box cooker every 1-2 hours

The parabolic mirror cooker with its sausages has to be realigned every 20 to 25 minutes at the position of the sun (2'26 ''). A box cooker only needs to be realigned every 1 to 2 hours (2'35 ''). Nothing can burn on the box cooker, you can let the stove cook unattended for several hours, "cooking (poaching) is very slow and gentle" (2'47 '').

Parabolic mirror cookers reach very high temperatures and the cooking time is approx. 25 minutes (3'1 ''). The box cooker takes 3 hours preparing the meal, also because there are passing some clouds (3'43 '').

The parabolic mirror cooker costs about 290 euros, the box cooker about 350 euros (3'24 ''), these are average prices (3'31 '').

Big dinner with box cooker meals in
                  stainless steel pots   The employees of the German TV station
                  WDR who worked for this solar energy film: Praetorius,
                  Rach, Kortum, Johanni
Big dinner with box cooker meals in stainless steel pots [34] - The employees of the German TV station WDR who worked for this solar energy film: Praetorius, Rach, Kortum, Johanni [35]
Note: use black pots!
With steel pots, the cooking time in the box cooker takes three hours. With black pots, the cooking time should be reduced by about 1/3.
With the box cooker you can cook up to 3 pots at the same time, with the parabolic mirror cooker you can only cook ONE pot, but much faster.
Michael Palomino, January 30, 2020

========

Solar cooker for Zimbabwe: Sun box is sprayed black outside and inside - with glass pane and aluminum reflector: 130ºC

Video: Technique without limits: solar cooker for Zimbabwe (4'35'')
(original German: Technik ohne Grenzen: Solarkocher für Simbabwe)

Video: Technik ohne Grenzen: Solarkocher für Simbabwe (4'35'')
https://www.youtube.com/watch?v=QKyRKnKHkck - YouTube channel: OTH Amberg-Weiden


In Europe it is 600 to 900 watts per m2 of solar radiation, in Africa it is sometimes over 1000 watts per m2 (1'44 ''), and the solar box should then become even hotter than the 130ºC that are possible in Europe ( 1'49 ''), in Africa 150ºC should be possible (1'55 ''). After spraying in black, 5°C more was reached (2'13 '').

Wooden box
                  with wooden tap   The sun box with the open aluminum reflector   The reflector angle is fixed with a rod
                  and holes  
Wooden box with wooden tap [36] - The sun box with the open aluminum reflector [37] - The reflector angle is fixed with a rod and holes [38] -
The front view of the sun box while cooking   The aluminum reflector of the sun box, zoom   Sun cooker
                  with black saucepan
The front view of the sun box while cooking [39] - The aluminum reflector of the sun box, zoom [40] - Sun cooker with black saucepan [41]
Condensation on the pot lid proves the
                  cooking effect   The sun cooker was sprayed black inside
                  and outside   The insulation material
                  of the solar box is also available in Africa
Condensation on the pot lid proves the cooking effect [42] - The sun cooker was sprayed black inside and outside [43] - The insulation material of the solar box is also available in Africa [44]
The
                  data of Technique without limits at Höchstadt at Aisch
                  River in northern Bavaria   The data of Technique without limits at Höchstadt
                  at Aisch River in northern Bavaria - the FB address
                  https://www.facebook.com/SolarkocherZimbabwe
The data of Technique without limits at Höchstadt at Aisch River in northern Bavaria [45] - the FB address https://www.facebook.com/SolarkocherZimbabwe [46]

And in 2015 the two women received a prize with their solar cooker:

Mittelbayerische Zeitung online, Logo

Zimbabwe May 5,2015: Cooking with solar energy instead of wood - and instructions for do it yourself - prize for "Ethics and Sustainability":
Solar cooker tested in Zimbabwe
(original German: Solarkocher in Simbabwe erprobt)
https://www.mittelbayerische.de/region/amberg/gemeinden/amberg/solarkocher-in-simbabwe-erprobt-22799-art1229001.html?fbclid=IwAR3yd5vCmn17EG4QLID4y_UYmnQYZbapIQX9zBtzdDwat00Eq_Xe7DdEYlQ

Translation:

<Irina Heitmann and Sophie Koch from OTH Amberg-Weiden receive an award for ethics and sustainability.

Amberg. Irina Heitmann and Sophie Koch (OTH) developed a kettle powered by solar energy. It was tested in Zimbabwe. In addition, the local people could be instructed for their own production. The expansion of the project is planned. The aim of the “Solar Cooker” project by Heitmann and Koch was also to replace scarce firewood with solar energy and to avoid frequent injuries from open fireplaces.

The award was taken by the former Siemens site manager, Prof. Dr. Erich Voss, OTH University Council and Chairman of the Amberg Friends Association at the Amberg-Weiden University. The friends of the university took part in the ethics and sustainability project. "This prize, which was awarded for the first time, serves to honor a topic developed and implemented by students, whereby interdisciplinary projects are preferred," said Voss in honor of the award. (Aon)>

========


The long solar oven with TWO glass panes + mirror at right angles - as if you had TWO suns - and an insulated shell construction all around: 179ºC

Video: DIY Advanced Solar Oven! Fully Insulated "No Turn" Solar Oven! (real wood, glass and mirror!) 350F+ (14'53'')
Solar oven
                  with best materials   
Solar oven with best materials [47] - Video: DIY Advanced Solar Oven! Fully Insulated "No Turn" Solar Oven! (real wood, glass and mirror!) 350F+ (14'53'')
https://www.youtube.com/watch?v=mzoL-Rjjg6A - YouTube-Kanal: desertsun02 - hochgeladen am 3.3.2019

There is insulation everywhere, the glass parts are fully insulated [assembled with non-toxic silicone] and never move (50 ''), up to 500º Fahrenheit is reached (260ºC) (53''), and at the back is a real mirror (56 ''), and the whole thing can be opened very easily with one single handle (1'7 '').

   Maximum quality in the materials of the
                  solar oven   2 pots
                  and 1 pan fit in the solar oven at the same time, here
                  made of stainless steel   Solar
                  oven with black pots and pan
Maximum quality in the materials of the solar oven [48] - 2 pots and 1 pan fit in the solar oven at the same time, here made of stainless steel [49] - Solar oven with black pots and pan [50]

The base is a black double layer of Kryolan [?] And the edges have been double sealed with a weather seal (1'13 ''). Black pots are usually used (1'28 ''). With this construction, 300 to 400 [º Fahrenheit] can easily be reached (150 to 200º Celsius) - the thermometer currently shows 200º Fahrenheit, 93º Celsius (1'51 ''). A bacon soup cooks in 30 minutes (2'40 '').

The solar oven with black pots and pan 02   The termometer
                  in the solar oven shows 200º Fahrenheit (approx. 100º
                  Celsius)   In a
                  short time the termometer in the solar oven is at 360º
                  Fahrenheit (162º Celsius)
The solar oven with black pots and pan 02 [51] - The termometer in the solar oven shows 200º Fahrenheit (approx. 100º Celsius) [52] - In a short time the termometer in the solar oven is at 360º Fahrenheit (162º Celsius) [53]

Bacon soup in the solar oven steaming
                  after 30 minutes   This solar oven does not need any
                  plastics or side mirrors  
Bacon soup in the solar oven steaming after 30 minutes [54] - This solar oven does not need any plastics or side mirrors [55]
-- holds 3 pans!
-- high temperature over 350F (176C)!
-- no angle cuts
-- no wasted space
-- made of best materials
-- no plastics, no polished aluminum - no non-sense
-- Easy DIY!
-- long low profile (and no side mirrors) equals very little shadowing
-- cooks for 6+ hours before turning is necessary adapting to the sun

The construction of the super solar oven: double frame with insulating wool - screwed + sealed with silicone - sprayed black, 2 glass plates + 1 mirror

First the frame is made, then the frame bottom, then the whole thing comes to the bottom of the oven, which has an air cushion, is screwed on there, at the end comes the handle bar, the mirror plate and the holders for the glass panes (8'15 '') , Then the insulation fiber material comes into the frame, is compressed and further refilled (8'31 ''). The frame is screwed on at the top and then the hollow bottom is screwed to the base (11'7 '').

The super solar oven, the construction in
                  detail   The inner frame and the outer
                  frame are manufactured ready   The frame base is
                  fixed  
The super solar oven, the construction in detail [56] - The inner frame and the outer frame are manufactured ready [57] - The frame base is fixed [58]
The
                  frame of the solar oven is ready   The frame of the solar oven with 3 large pots   The solar oven has a base with an air cushion  
The frame of the solar oven is ready [59] - The frame of the solar oven with 3 large pots [60] - The solar oven has a base with an air cushion [61]
The bottom of the solar oven is closed   The bottom of the solar oven is screwed on   Solar oven: The mirror plate is screwed on
The bottom of the solar oven is closed [62] - The bottom of the solar oven is screwed on [63] - Solar oven: The mirror plate is screwed on [64]

This is followed by fixing the mirror plate, the little beams for the glass plates, then the cracks are filled with non-toxic silicone and then comes the filling with green fiber insulation (8'19 ''). After this, the frame is also covered with wood and screwed on (9'53 '').

The
                  solar oven gets a handle bar   Solar oven: Now the little bars
                  for the window panes are fixed   cracks are sealed with non-toxic silicone
The solar oven gets a handle bar [65] - Solar oven: Now the little bars for the window panes are fixed [66] - cracks are sealed with non-toxic silicone [67]
The green
                  fiber insulation   The frame is filled with green fiber
                  insulation   The green fiber insulation is compressed
                  with a stick
The green fiber insulation [68] - The frame is filled with green fiber insulation [69] - The green fiber insulation is compressed with a stick [70]
The green fiber insulation is compacted
                  with a stick 02   the frame is covered and closed by screws   the long side of the frame is
                  covered and screwed down
The green fiber insulation is compacted with a stick 02 [71] - the frame is covered and closed by screws [72] - the long side of the frame is covered and screwed down [73]

Then the edge is reinforced with a wooden joint seal, doubled at the front (11'43 ''). The bottom is opened on one side, filled with green fiber insulation, stuffed, further filled, stuffed etc. and screwed back on (11'45 '').

Solar oven: The handle is screwed on   The
                  hollow bottom of the solar oven   The bottom is screwed on and
                  filled with green fiber insulation
Solar oven: The handle is screwed on [74] - The hollow bottom of the solar oven [75] - The bottom is screwed on and filled with green fiber insulation [76]
The floor is screwed on and
                  filled with green fiber insulation 02   gap sealing on
                  one corner   solar oven: double gap sealing on the front
The floor is screwed on and filled with green fiber insulation 02 [77] - gap sealing on one corner [78] - solar oven: double gap sealing on the front [79]

Then the mirror and the glass plates are put as a test for checking whether everything is ok (11'54 ''). After that, some parts and the interior are sprayed in black, the glass plates are fixed firmly with silicone, as well as the mirror (12'50 '').

The
                  solar oven with the mirror and the glass plates, the
                  test whether everything fits   Solar oven: parts are sprayed in black   The interior of the solar oven is sprayed
                  in black
The solar oven with the mirror and the glass plates, the test whether everything fits [80] - Solar oven: parts are sprayed in black [81] - The interior of the solar oven is sprayed in black [82]
The glass plate assembly is prepared
                  with silicone   The large glass plate of the solar
                  oven is installed   Both glass panes are installed,
                  only the mirror is missing yet
The glass plate assembly is prepared with silicone [83] - The large glass plate of the solar oven is installed [84] - Both glass panes are installed, only the mirror is missing yet [85]
Here, this is the complete solar oven
Here, this is the complete solar oven [86]

The construction of the solar oven: everything at right angles and with a windscreen: as if you had TWO suns - 70% more solar energy

With this construction all is laid out at right angles, there are no sloping sides (12'49''). All parts are rectangular, the wooden parts, the glass parts, the mirror, just everything (12'54 ''). There are no slants, no curves, no triangles (12'56 ''). So it's the simplest technique, nothing complicated there (12'58 ''). It makes no sense to install a slope and then set up a horizontal pan inside, because half the heat goes above the pot and escapes through the glass (13'7 ''). The glass panes are supposed to collect the energy and embrace the saucepans with it, so it has to be pure glass, plexiglass doesn't work, forget it (13'14 ''). And then there must also be a full-glass front window (13'18 ''), so, if there are solid parts on the front, and an inclined window, that doesn't work (13'23 ''). With this construction [everything at right angles with a windscreen] the sun comes in through the windscreen and through the mirror (13'29 ''), and the result is 70% more solar energy inside (13'37 ''), so, with this windscreen is like having two suns (13'39 ''). Polished aluminum one does not need, nor cardboard is installed, no tinfoil paper, no plexiglass (13'52 ''). Overall, the thing weighs 35 to 40 pounds (18 to 20kg) (13'58 '').

And [during cooking] the pot handles get hot too, so you can take out the pots only with pot holders (14'13 '').

The advantages: long oven - hardly any turning - all real wood, glass, mirror - non-toxic silicone for sealing - maximum reached is 179º Celsius

Solar oven,
                  the fact sheet
Solar oven, the fact sheet [87]

-- It's long low profile design means you almost never have to turn it. Has almost no shadow so you can cook for 6-7 hours before you need to turn it! (often not at all!).
-- It's fully insulated with green fiber (natural fiber insulation) on sides, back and bottom. For maximum performance, it's made with all real wood, real glass and real mirror! (no plastics or polished aluminium) and definitely no cardboard or tinfoil! For the sealant I only used "FDA food Safe" 100% silicone caulk (good up to 500F).
-- Has a unique way to open it so heat losses are minimal *the whole oven tilts back!
-- high temps so far 355F! (179C)... (hoping to get it to 400 - about 200ºC)
-- It's low center of gravity and weight means it can handle pretty high winds 40mph+
-- Made with all rectangular pieces (wood glass and mirror) so no slant cuts, curved cuts or triangle cuts so it's super easy to make!
-- Glass panels hug the pots to keep heat centered
-- Large internal cooking area 28.5''by12'' (72x30.5cm) holds 3 pans and is the largest space by far of any solar oven on the market.. biggest is 17'' by 9.5'' (43.2x25cm) and cost $250 (DIY cost $50). (14'22'')

Solar oven, dimensions 01: the wooden parts   Solar oven, dimensions 02: mirrors and
                  glass panes
Solar oven, dimensions 01: the wooden parts [88] - Solar oven, dimensions 02: mirrors and glass panes [89]
Solar oven, other
                  parts   List
                  of nails, screws and 1 handle
Solar oven, other parts [90] - List of nails, screws and 1 handle [91]
List with the color and other accessories   The solar oven outside under a blue
                  protection foil
List with the color and other accessories [92] - The solar oven outside under a blue protection foil [93]


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Box cooker, sun cooker, solar oven, solar cooker etc.: The sun box (the box cooker): box with styrofoam + black paper + glass pane + aluminum foil reflector --  Video: How to make a simple solar cooker to understand the use of solar energy (3'54'')   -- Sun cooker: the difference between sun box and parabolic mirror -- The construction of a sun box: cardboard box - styrofoam - black paper - aluminum - glass plate -- The sun box (box cooker) made of solid aluminum, well insulated, double glass plate, with mirror: 140ºC -- The minutes: Cooking of a big menue at 140ºC -- Parabolic mirror cooker has to be realigned every 20-25min. - the box cooker every 1-2 hours -- Solar cooker for Zimbabwe: Sun box is sprayed black outside and inside - with glass pane and aluminum reflector: 130ºC -- Zimbabwe May 5,2015: Cooking with solar energy instead of wood - and instructions for do it yourself - prize for "Ethics and Sustainability": Solar cooker tested in Zimbabwe -- The long solar oven with TWO glass panes + mirror at right angles - as if you had TWO suns - and an insulated shell construction all around: 179ºC -- Video: DIY Advanced Solar Oven! Fully Insulated "No Turn" Solar Oven! (real wood, glass and mirror!) 350F+ (14'53'') -- The construction of the super solar oven: double frame with insulating wool - screwed + sealed with silicone - sprayed black, 2 glass plates + 1 mirror -- The construction of the solar oven: everything at right angles and with a windscreen: as if you had TWO suns - 70% more solar energy -- The advantages: long oven - hardly any turning - all real wood, glass, mirror - non-toxic silicone for sealing - maximum reached is 179º Celsius

^