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close this bookSolar Cookers in the Third World (GTZ, 1990, 228 p.)
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View the documentAcknowledgements
View the document1. Introduction
Open this folder and view contents2. Solar Cookers and Solar Cooker Projects
Open this folder and view contents3. Conditions of Acceptance for Solar Cookers
View the document4. Questions Concerning Solar Cookers and Solar Cooker Projects
View the document5. References
Open this folder and view contentsAppendix 1: Solar Cooking Devices
View the documentAppendix 2: Self-construction Directions for the ULOG Tropical

Acknowledgements

Deutsches Zentrum fwicklungstechnologien- GATE

Deutsches Zentrum fwicklungstechnologien - GATE - stands for German Appropriate Technology Exchange. It was founded in 1978 as a special division of the Deutsche Gesellschaft fhnische Zusammenarbeit (GTZ) GmbH. GATE is a centre for the dissemination and promotion of appropriate technologies for developing countries. GATE defines "Appropriate technologies" as those which are suitable and acceptable in the light of economic, social and cultural criteria. They should contribute to socio-economic development whilst ensuring optimal utilization of resources and minimal detriment to the environment. Depending on the case at hand a traditional, intermediate or highly-developed can be the "appropriate" one. GATE focusses its work on the key areas:

- Dissemination of Appropriate Technologies: Collecting, processing and disseminating information on technologies appropriate to the needs of the developing countries: ascertaining the technological requirements of Third World countries: support in the form of personnel, material and equipment to promote the development and adaptation of technologies for developing countries.

- Environmental Protection. The growing importance of ecology and environmental protection require better coordination and harmonization of projects. In order to tackle these tasks more effectively, a coordination center was set up within GATE in 1985.

GATE has entered into cooperation agreements with a number of technology centres in Third World countries.

GATE offers a free information service on appropriate technologies for all public and private development institutions in developing countries, dealing with the development, adaptation, introduction and application of technologies.

Deutsche Gesellschaft fhnische Zusammenarbeit (GTZ) GmbH

The government-owned GTZ operates in the field of Technical Cooperation. 2200 German experts are working together with partners from about 100 countries of Africa, Asia and Latin America in projects covering practically every sector of agriculture, forestry, economic development, social services and institutional and material infrastructure. - The GTZ is commissioned to do this work both by the Government of the Federal Republic of Germany and by other government or semi-government authorities.

The GTZ activities encompass:

- appraisal, technical planning, control and supervision of technical cooperation projects commissioned by the Government of the Federal Republic or by other authorities

- providing an advisory service to other agencies also working on development projects

- the recruitment, selection, briefing, assignment, administration of expert personnel and their welfare and technical backstopping during their period of assignment

- provision of materials and equipment for projects, planning work, selection, purchasing and shipment to the developing countries

- management of all financial obligations to the partner-country.

Deutsches Zentrum fwicklungstechnologien - GATE
in: Deutsche Gesellschaft fhnische Zusammenarbeit (GTZ) GmbH
P. O. Box 5180
D-6236 Eschborn 1
Federal Republic of Germany
Tel.: (06196) 79-0
Telex: 41 523-0 gtz d

Types of solar cookers

Box-type solar cookers:

ATDO reflector box type solar cooker
ATRC solar cooker
Cocina solar
Dhauladhar solar cooker
Indian box type solar cooker
Kerr-cole solar box cooker
MECTAT solar ovens
Mina solar pressure cooker
Orangi cooking box
RERI-SEP solar cooking box
RIIC solar oven
SERVE solar oven
Suryamuklu box type solar cooker
22° solar cooker
ULOG tropical solar cooker
ULOG European solar cooker
Four-mirror cooking box

Reflector cookers:

Advanced reflector cooker for Mali Bottom-heated concentrator box
External concentrating eccentric axis box style solar cooker (EEB)
Falco S/C . Sobako 1 / SOBA 1 Sun basket Sungril Suryakund
Table-type reflector cooker Tube solar oven Valparaiso reflector cooker VIAX solar cooker SK 10

Heat accumulating solar cookers:

Heat accumulating steam cooker
ISE solar cooker With integral oil storage
Solar hot plate cooker
Heat pipe storage solar cooker with evacuated tube collectors

Convective cookers:

Convective solar cooker (CSC)
Steam immersion heater solar cooker

Comparative survey:

Synoptic comparison table of solar cookers

Symbols and Units

A

aperture, area of incidence

a

air permeability coefficient

m³/(h m Pa²/³)

b

breadth, width

m

c

specific heat capacity

kJ/(kg K)

CC

cost of cooking, price of energy per kg. of food cooked during the first year

$/kg

CCL

cost of cooking with respect to the lifetime, price per kg of food cooked over the lifetime of the cooker

$/kg

d

depth

m

G

global, irradiation

MJ/m² ; kWh/m²

G',g

global irradiance

W/m²

H

diffuse (sky) radiation

MJ/m² ; kWh/m²

H'

specific enthalpy

kJ/kg

DH'

differential specific enthalpy

kJ/kg

h

height

m

L

useful lifetime in years

a

l

length

m

li

length of joint I

m

m

mass

kg

n

number of meals cooked per day

l

P,

purchase price

$

PEL

lifetime price of energy

$/kWh

p

pressure

Pa

DPi

pressure drop across joint I

Pa

Q'

thermal output power

W

S

direct (beam) radiation

MJ/m2 ; kWh/m2

T

temperature

°C

DT

temperature difference

K

DT'

temperature interval of the cooking process

K

t

time, cooking time

s, h, d, a

U

heat transfer coefficient

W/(m²K)

V

volume

m³; 1

V'

volumetric flow

m /s

a

absorptance

l

n

efficiency

l

n'

efficiency of energy-collecting components l


l

wavelength

µm

p

density

kg/m³

T

transmittance

l

Indices

A

aperture

I

counting index

J

joints

L

loss

Opt

optical

U

useful

W

wall