Development studies
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Design calculations for the civil works and the practical implementations for an 8 kW - to 22 kW - upgrade of a micro hydropower run-off river scheme in Nepal
This paper comprises the implementation of: 'Two Ideas to Regain the Power Otherwise Lost in Run-off River Schemes with Elevated Powerhouses', a Practical Answers paper published by Practical Action Publishing in 2025.
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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...
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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...
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How to Build a Solar Oven out of Scrapped 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 scrapped materials. It is aimed to reduce the need for fire wood and other fuels in refugee camps.
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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...
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First Response to Trauma - Arabic
Juliet Millican, Cheyeh Julius Ngwan
This picture-led booklet, made in collaboration with SACOD, explores how community responders can work with people who have experienced trauma in a safe way. Re-Alliance is a coalition of field practitioners, policymakers, educators, community leaders and humanitarian and development workers, shari...
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Building a Garden on the Roof
Juliet Millican, Ahmed Sourani
This picture-led booklet, made in collaboration with GUPAP in Gaza and Sporos in Greece, explores how to grow Permaculture-inspired gardens on the roof, especially designed for communities. Re-Alliance is a coalition of field practitioners, policymakers, educators, community leaders and humanitaria...
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Building garden in the roof - Arabic
Juliet Millican, Ahmed Sourani
This picture-led booklet, made in collaboration with GUPAP in Gaza and Sporos in Greece, explores how to grow Permaculture-inspired gardens on the roof, especially designed for communities. Re-Alliance is a coalition of field practitioners, policymakers, educators, community leaders and humanitaria...
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Community Composting
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...
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Community Composting - Arabic
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...