Up to 5 kg of food can be cooked at one time. The cooker has to be adjusted towards the direction sun position every 20 minutes. The use of this solar cooker contributes to reduction of environmental degradation.
2.0 EXHIBITION BY VARIOUS INSTITUTION / ORGANISATIONS
2.1.1
Centre for Agricultural Mechanisation
and Rural Technology
(CAMARTEC)
2.1.1 Introduction:
The Centre offers consultancy services for the
production and use of farm implements, rural transportation, low-cost house
construction, water and sanitation energy and publications. CAMARTEC
accepts purpose orders for the listed items details, which can be bought
at reasonable prices.
2.1.2
Items
exhibited at Nguvu Kazi/Jua Kali Show:
The cooker consists of a parabolic concentrator and a
steel frame to pivot the concentrator is made of steel, to hold the cooking
vessel. The concentrator is made of steel, frame mirror for reflector and
concrete for the stand. With sunshine the cooker delivers 1000 watts effective
cooking power. The maximum temperature obtainable is 4000C at the
focal zone
Plate 1.
Parabolic solar cooker
Up to 5
kg of food can be cooked at one time. The
cooker has to be adjusted towards the direction sun position every 20 minutes.
The use of this solar cooker contributes to reduction of environmental
degradation.
It is a high temperate and efficient cooker that can
be used to cook all types of foods. The average cooking time is 2 hours.
(Plate 1) Price
= Tsh
150,000
(b)
Box
solar cooker:
The cooker is constructed from wood,
galvanized sheet, plain glass, cotton waste, plywood, blackboard paint and a few metal
parts. This is a low temperature (1500C) thus a low efficient cooker.
The cooking time ranges from 3 to 5 hours. This cooker does not require
adjustment direction sun position.
Price: Tsh
45,000
(c) Cinvaram
machine:
A machine for compacting soil cement blocks of
dimension 100mm x 140mm x 290mm. Soils of clay content more than 30% are
suitable and for pure clay soil savid is added to modify consistency. The
average content of cement added in manufacturing the block is 6%. A bag of
cement can give between 100-120 blocks. The technology substitutes burnt soil
blocks and saves environment degradation in terms of fuel wood harvesting.
The machine measures 400mm high by 180mm wide by
350mm long and weighs 60kg. It is a welded mild steel construction.
Price: Tsh
120,000
(d) Ram
press
A machine designed to extract oil from a variety of
oilseeds such as sunflower, sesame, coconuts and groundnuts. Raising and pulling
down a long handle, which drives a steel ram into a cage cylinder in which the
seeds are pressed, operates it. The stroke of the handle goes from the vertical
position to waist level. One person can operate the machine for several hours.
When the handle is in an upright position the steel
ram is pushed out and seeds fed in
from the hopper into the cage. Each time the handle is pressed down a stream of
oil comes out from the underside of the cage. Since whole seed is being pressed,
the oil that comes out of the cage cylinder will be of the seed hull colour and
thus has to be purified before use.
The methods used for purifying the oil include
boiling in water, using a paper or cloth filter, or putting the oil in a
container and setting it aside until the impure particles settle to the bottom.
Price: Tsh. 120,000
Plate 2: Water
heater and ram press
(e) Water
heater
A cylindrical tank with a capacity of 112 litres used
for water heating. The heater uses by products of a timber factory i.e waste
trees, timber, sawdust and afrc-by products (rise husks, corn cobs) and other
waste business. The average heating time is 30 minutes. The temperature
obtainable ranges from 60-700C. the amount of woodfuel required is 3
kg. The materials for the tank are stainless steel and mild steel sheets.
Price: Tsh 350,000(Stainless steel)
Tsh
120,000 (Mild steel)
(f) Sawdust stove .
This is an improved portable household stove that uses sawdust, rice husks and dry animal dung from a Kraal. It is easy to set up, use and does not pollute the cooking place. It takes an average of 4 hour to use per charge of hardwood sawdust and 6 hours or more per charge of rice husks or animals dung. The stove is constructed from mild steel sheet, round bar, square bar, flat bar and black pipe.
(Plate 3)Price Tshs 15,000/=
Contact address: CAMARTEC,
P.O. BOX 764, ARUSHA.
