Development studies
-
Two Ideas to Regain the Power Otherwise Lost in Run-off River Schemes with Elevated Powerhouses
For run-off schemes, floods often require powerhouses to be set back from the riverbanks. This raising of the level of the powerhouse frequently curtails much of the potential head. Two low-cost proposals for such run-off schemes are presented. One proposal is a draft tube combined with a longitudin...
-
Considerations, design calculations, construction, test and evaluation of a cavity walled solar oven
This report investigates the feasibility of designing a dual (i.e. cavity) wall and doubled glazed solar oven, with the aim to raise the operating temperature to as near to 100oC as possible. The present design has aimed to comply with the living conditions in - and to use cheap materials and tools...
-
Thermal Tests of the 'Solar Oven revision 2'
This report describes the thermal test of the solar oven revision 2 - built in August 2024. The aim is – based on the thermal measurements at the oven – to find out – for a given irradiation - how much the solar oven can rise its temperature T above the temperature of the ambient TAmb. - and how fas...
-
How to Build a Solar Oven out of Scraped Materials
This is a brief guide-line on how to build a solar oven - based on experiences with building a homemade solar ovens, at the lowest possible cost, with simple tools and using scraped materials. It is aimed to reduce the need for fire wood and other fuels in refugee camps.
-
Considerations, design calculations, construction, test and evaluation of a cavity walled solar oven Part 2: Evaluation of insulation materials
This report is Part 2 of- (and an addendum to-) the Part 1 of: “Considerations, design calculations, construction, test and evaluation of a cavity walled solar oven”. Both Part 1 and Part 2 of the report are based on a cavity walled solar oven consisting of two boxes – one within the other – with a...
-
Compostaje en la Comunidad
James Atherton, Jackie Kearney, Paulinho Muzaliwa
This illustrated guide explores how to establish composting at community scale, to build soil health, cycle 'waste', and grow community cohesion. Re-Alliance is a coalition of field practitioners, policymakers, educators, community leaders and humanitarian and development workers, sharing skills an...
-
Ecosan toilets in a barrel
This illustrated guide explores how to build and maintain a urine-diversion composting toilet called an Ecosan, which captures nutrient-rich urine for plant fertiliser, and human manure for use in farming. Re-Alliance is a coalition of field practitioners, policymakers, educators, community leaders...
-
Ecosan: Vyoo Katika Pipa
This illustrated guide explores how to build and maintain a urine-diversion composting toilet called an Ecosan, which captures nutrient-rich urine for plant fertiliser, and human manure for use in farming. Re-Alliance is a coalition of field practitioners, policymakers, educators, community leaders...
-
Ecosan: Indoros en un Barril
This illustrated guide explores how to build and maintain a urine-diversion composting toilet called an Ecosan, which captures nutrient-rich urine for plant fertiliser, and human manure for use in farming. Re-Alliance is a coalition of field practitioners, policymakers, educators, community leaders...
-
Ecosan : Des Toilettes dans un Baril
This illustrated guide explores how to build and maintain a urine-diversion composting toilet called an Ecosan, which captures nutrient-rich urine for plant fertiliser, and human manure for use in farming. Re-Alliance is a coalition of field practitioners, policymakers, educators, community leaders...