1.2 Coordonnées des personnes-ressources et des institutions impliquées dans l'évaluation et la documentation de la Technologie

Nom du ou des institutions qui ont facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Deutsche Welthungerhilfe e. V. (Welthungerhilfe) - Tadjikistan

1.3 Conditions relatives à l'utilisation par WOCAT des données documentées

Le compilateur et la(les) personne(s) ressource(s) acceptent les conditions relatives à l'utilisation par WOCAT des données documentées:

Oui

2.1 Courte description de la Technologie

Définition de la Technologie:

The implementation of several low cost energy efficiency measures to reduce the amount of organic material used as fuel within rural households.

2.2 Description détaillée de la Technologie

Description:

In many cases local inhabitants of rural areas depend heavily on locally available natural resources, contributing to, and accelerating deforestation. As a low cost fuel source, local households often use cow-dung and wood. Taking these from the local area contributes to decreased soil fertility and erosion processes. Most of the dung collected from livestock is burnt in a very inefficient manner for cooking, baking and heating purposes. Based upon assessments by Welthungerhilfe in 600 households (HH) who were using cow dung as the only fuel material, on average one HH uses 4.6 tons of cow dung annually when using traditional cooking stoves, 6 tons for heating and 4.5 tons for bread baking. This means almost 15.1 tons of cow dung is burnt annually per HH.

Using a simple modification of the traditional cooking stove, approximately 50 - 60% or 2.3 tons of fuel material can be saved. This saving can be further increased by the utilisation of a pressure cooker that decreases the cooking time by 50%. Not all local hot meals can be cooked with a pressure cooker but it can contribute to an additional saving of 0.7 ton of organic matter.

The introduction of a metal heat exchanger on the exhaust pipe of a cast iron stove can help save a household 3 tons of fuel material per year, the effectiveness can be further increased by the incorporation of bread baking compartment.

Further savings can be made by using straw, mud and wood to improve the thermal insulation of the exterior walls, ceiling and floor in the house.

Through the integration of all above measures approx 60% of the current usage rates of organic material used for fuel can be saved. In addition it will keep the house warmer for longer, reduce the smoke in the air, and help retain organic material in the soil.

Purpose of the Technology: The main objective of the energy efficiency technology is to address one of the root causes of the deforestation process and to improve soil fertility i.e. to decrease the demand from the local population for organic fuel. This project used a range of technologies to address this issue which in combination provided substantial savings in organic fuel.

Establishment / maintenance activities and inputs: Cooking stoves: For centuries local populations have been using traditional cooking stoves for cooking, especially during the warm seasons of the year. These were made from a mixture of mud and straw. The modification of these involves improving the aeration process during the burning of the fuel. This is achieved by putting a metallic cover with one inflow cutting and six small smoke outflow holes surrounding the cooking pot. The only input needed which is not locally available is the metallic cover.
Pressure cookers: As maintenance is required 1-2 times per season to keep the cooking stove functioning efficiently, the utilisation of pressure cookers can be easily integrated with the modified cooking stoves.
Heat exchangers: The heat exchangers installed on top of the iron ovens, can be produced by local tradesmen and need to be cleaned every 1-2 months. They have to be installed before the start of the winter season when the heating is needed.
House installation: The house insulation, using locally available materials does not need maintenance once it is installed. However, the storage of dry fruits or bread in the attic should be avoided as it could attract mice which can destroy the insulation.

Welhungerhilfe provided subsidies for all the above work, except for the heat exchangers.

Natural / human environment: The geographical area served by the project is mainly hill slopes, covered in low grade pasture fodder with wheat crops planted in loess soil. Although the soils have the potential to be very fertile, they are overused and not well managed and thus have become degraded and denuded. One of the main contributing factors to this is the removal of organic material from the biomass cycle. Trees, bushes and organic material is cut and collected to be used as fuel.

The main source of income in the area is from semi-subsistence farming, and the removal of organic material has a significant impact on their crops and livestock.

The houses are made from concrete foundations and mud bricks, these and the current stoves are all energy inefficient and fail to retain heat.

2.3 Photos de la Technologie

2.5 Pays/ région/ lieux où la Technologie a été appliquée et qui sont couverts par cette évaluation

2.6 Date de mise en œuvre de la Technologie

Si l'année précise est inconnue, indiquez la date approximative: :

• il y a moins de 10 ans (récemment)

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• par le biais de projets/ d'interventions extérieures

Commentaires (type de projet, etc.) :

Promotion of energy efficiency measures began in 2007 by Welthungerhilfe projects

3.2 Type(s) actuel(s) d'utilisation des terres, là où la Technologie est appliquée

Commentaires:

Major land use problems (compiler’s opinion): The land in rural Tajikistan is becomming denuded due to the pressure for organic fertilisers used as a source of fuel for heating and cooking. This impacts on soil quailty, yields and soil stability. This issue is compounded by the relatively high price of mineral fertilisers.

Major land use problems (land users’ perception): Crop yields decrease.

3.6 Mesures de GDT constituant la Technologie

Commentaires:

Main measures: structural measures

3.7 Principaux types de dégradation des terres traités par la Technologie

Commentaires:

Main type of degradation addressed: Cn: fertility decline and reduced organic matter content

Secondary types of degradation addressed: Pc: compaction

Main causes of degradation: soil management (poor ploughing practices), deforestation / removal of natural vegetation (incl. forest fires) (deforestation), over-exploitation of vegetation for domestic use (removal of trees and bushes for fuel pruposes.), overgrazing (imbalance of carrying capacity and size of livestock herds.), disturbance of water cycle (infiltration / runoff) (reduced infiltration capacity.), poverty / wealth (local population have restricted funds)

Secondary causes of degradation: crop management (annual, perennial, tree/shrub) (monoculture), change of seasonal rainfall (more intensive heavy rainfall events), droughts (events occuring more frequently), population pressure (population is increasing), labour availability (external labour migration)

3.8 Prévention, réduction de la dégradation ou réhabilitation des terres dégradées

Spécifiez l'objectif de la Technologie au regard de la dégradation des terres:

• prévenir la dégradation des terres
• réduire la dégradation des terres

Commentaires:

Main goals: prevention of land degradation

Secondary goals: mitigation / reduction of land degradation

4.1 Dessin technique de la Technologie

4.2 Informations générales sur le calcul des intrants et des coûts

autre/ monnaie nationale (précisez):

TJS

Indiquez le taux de change des USD en devise locale, le cas échéant (p.ex. 1 USD = 79.9 réal brésilien): 1 USD = :

4,5

4.3 Activités de mise en place/ d'établissement

	Activité	Calendrier des activités (saisonnier)
1.	Cook stove modification	any
2.	Pressure cooker	any
3.	House insulation	once in the beginning
4.	heat exchanger	once in the beginning

4.4 Coûts et intrants nécessaires à la mise en place

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Main d'œuvre	Labour	per stove	1,0	5,5	5,5	100,0
Main d'œuvre	Labour	per room	1,0	37,8	37,8	100,0
Matériel végétal	Wheat straw	bales	12,0	4,9	58,8	100,0
Matériaux de construction	Metallic cover	per stove	1,0	5,1	5,1	34,0
Matériaux de construction	Earth	per stove	1,0	0,5	0,5	100,0
Matériaux de construction	Wooden lath	per room	1,0	72,0	72,0	15,0
Matériaux de construction	Nail, lime, brush, emalen	per room	1,0	30,75	30,75	100,0
Matériaux de construction	Veneer and glueing silicone	per room	1,0	43,8	43,8	100,0
Autre	Pressure cooker	piece	1,0	22,2	22,2	80,0
Autre	heat exchanger	per stove	1,0	30,0	30,0	100,0
Autre	Transportation cost		1,0	44,0	44,0	100,0
Coût total de mise en place de la Technologie					350,45
Coût total de mise en place de la Technologie en dollars américains (USD)					77,88

Commentaires:

Duration of establishment phase: 12 month(s)

4.5 Activités d'entretien/ récurrentes

	Activité	Calendrier/ fréquence
1.	adjustment of modified cook stove	twice per year
2.	cleaning of heat exchanger	twice per year

4.6 Coûts et intrants nécessaires aux activités d'entretien/ récurrentes (par an)

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Main d'œuvre	Labour	per stove	1,0	3,3	3,3	100,0
Coût total d'entretien de la Technologie					3,3
Coût total d'entretien de la Technologie en dollars américains (USD)					0,73

Commentaires:

Machinery/ tools: brush

The costs are based upon 2010 prices.

4.7 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

The price of the construction materials are dependent on many different external factors, and prices are generally increasing seasonally and annually.

5.1 Climat

5.2 Topographie

5.3 Sols

5.4 Disponibilité et qualité de l'eau

5.5 Biodiversité

Commentaires et précisions supplémentaires sur la biodiversité:

Species diversity: medium, low

5.6 Caractéristiques des exploitants des terres appliquant la Technologie

Indiquez toute autre caractéristique pertinente des exploitants des terres:

Land users applying the Technology are mainly common / average land users

Population density: 10-50 persons/km2

Annual population growth: 1% - 2%

90% of the land users are poor.
10% of the land users are poor.

Off-farm income specification: local inhabitants are in many cases dependent on remittances from Russia and other income generating activities.

5.7 Superficie moyenne des terres utilisées par les exploitants des terres appliquant la Technologie

5.8 Propriété foncière, droits d’utilisation des terres et de l'eau

Propriété foncière:

• état

Commentaires:

There are a variety of land user and water rights within the three districts, but they do not directly affect the implementation of the technologies.

5.9 Accès aux services et aux infrastructures

6.1 Impacts sur site que la Technologie a montrés

Impacts socio-économiques

Production

Revenus et coûts

Impacts socioculturels

Impacts écologiques

Sols

Biodiversité: végétale, animale

Autres impacts écologiques

6.3 Exposition et sensibilité de la Technologie aux changements progressifs et aux évènements extrêmes/catastrophes liés au climat (telles que perçues par les exploitants des terres)

Changements climatiques progressifs

Changements climatiques progressifs

	Saison	Augmentation ou diminution	Comment la Technologie fait-elle face à cela?
températures annuelles		augmente	bien

Extrêmes climatiques (catastrophes)

Catastrophes météorologiques

	Comment la Technologie fait-elle face à cela?
pluie torrentielle locale	pas connu
tempête de vent locale	pas connu

Catastrophes climatiques

	Comment la Technologie fait-elle face à cela?
sécheresse	bien

Catastrophes hydrologiques

	Comment la Technologie fait-elle face à cela?
inondation générale (rivière)	pas connu

Autres conséquences liées au climat

Autres conséquences liées au climat

	Comment la Technologie fait-elle face à cela?
réduction de la période de croissance	bien

Commentaires:

The thermal could be modified to increase its thermal properties.

6.4 Analyse coûts-bénéfices

Quels sont les bénéfices comparativement aux coûts de mise en place (du point de vue des exploitants des terres)?

Quels sont les bénéfices comparativement aux coûts d'entretien récurrents (du point de vue des exploitants des terres)?

Commentaires:

As it uses mainly locally available materials, it is a low cost approach which increases energy efficiency and improves resource use.

6.5 Adoption de la Technologie

Commentaires:

70% of land user families have adopted the Technology with external material support

1355 land user families have adopted the Technology with external material support

Comments on acceptance with external material support: The amount of the local's contribution to the project themselves was between 52.7% to 100%.

30% of land user families have adopted the Technology without any external material support

569 land user families have adopted the Technology without any external material support

Comments on spontaneous adoption: Fitting heat exchangers, adapting cooking stoves, and improving house thermal insulation are the main forms of technology that have been replicated in the above households.

There is a little trend towards spontaneous adoption of the Technology

Comments on adoption trend: This is restricted due to limited access to funds.

6.7 Points forts/ avantages/ possibilités de la Technologie

Points forts/ avantages/ possibilités du point de vue de l'exploitant des terres
It is very affordable How can they be sustained / enhanced? By involving local relevant authorities and departments
It saves and minimises expenditures for electricity, gas, and firewood procurement
The rooms are warmer and I can cook bread inside and save more fuel.

Points forts/ avantages/ possibilités du point de vue du compilateur ou d'une autre personne ressource clé
It is a low cost measure using locally available materials. The heat exchanger can improve the heating capacity of the room threefold, for example. How can they be sustained / enhanced? replication rates could be increased through promotion to larger audiences with support of local authorities or by law.
It is environmental friendly and increases the amount of organic material that stays within the soil. How can they be sustained / enhanced? There could be further awareness raising of the benefits of keeping organic materials in the soil.
It saves time for collecting fire material wood and cow dung.
It presents an opportunity to increase land productivity through application of organic fertilisers
The technologies do not have a large initial financial cost and can be implemented progressively as funds become available. How can they be sustained / enhanced? Training of more local teachers to provide demonstrations to the community.

6.8 Faiblesses/ inconvénients/ risques de la Technologie et moyens de les surmonter

Faiblesses/ inconvénients/ risques du point de vue de l’exploitant des terres	Comment peuvent-ils être surmontés?
More labour needed to cut fuel into smaller pieces	Behavioural change

Faiblesses/ inconvénients/ risques du point de vue du compilateur ou d'une autre personne ressource clé	Comment peuvent-ils être surmontés?
Not all meals can be cooked in a pressure cooker
Heat exchangers can get very hot for cooking purposes

7.1 Méthodes/ sources d'information

7.2 Références des publications disponibles

Titre, auteur, année, ISBN:

Brochure "Soil improvement starts with efficient cook stoves! low cost options to increase energy efficiency in Southern Tajikistan"

Disponible à partir d'où? Coût?

Weltgungerhilfe projects in Khatlon region, Temurmalik district

Titre, auteur, année, ISBN:

Welthungerhilfe project final narrative report (144-912)

Disponible à partir d'où? Coût?

Weltgungerhilfe projects in Khatlon region, Temurmalik district