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 [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) [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]
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 [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 [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 [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 2,3 [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 [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
[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 [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 [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)
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 [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
[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)
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 [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 [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 [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 [45] - the FB address https://www.facebook.com/SolarkocherZimbabwe
[46]
And in 2015 the two women received a prize with their solar
cooker:
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 [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 [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 [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
[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 [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 [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 [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 [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 [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
[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 [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 [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 [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 [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 [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 [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 [88] - Solar
oven, dimensions 02: mirrors and glass panes [89]
Solar oven, other parts [90] - List of nails, screws and 1
handle [91]
List with the color and other accessories [92] - The solar
oven outside under a blue protection foil [93]
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
