From GravityLight to NowLight: A Startup Pivots as Technolog...
Editor’s note: From GravityLight to NowLight, a startup has overhauled its Internet-famous gravity-powered light. The result is a pivot...
Engineering for Change
Interest: Energy
When the sun goes down, the day ends. No work after dark, no studying. That’s the reality for one quarter of the world’s population that lives without electricity. Inventive design and the falling cost of solar power is lighting up homes that the traditional energy grid has left dark. Power solutions that can scale are filling in the grid gaps with solar, hydro, wind and biogas. With alternative energy solutions, the world is lighting up.
Interest: Energy
Seven Off-Grid Refrigeration Prototypes: Finalists from EWB-...
Draft animals and wood fires count among the power sources for new, extremely low-cost technology proposed in a worldwide design contest for off-grid refrigeration. In September of 2019, the...
The Himalayan Rocket Stove: Now Viral on YouTube
The demo video for an improved rocket stove optimized for use in the heights of the Himalayas has racked up more than 10,000 views on YouTube. The Himalayan Rocket...
What’s Cooking in Nigerian, Ghanaian, and Ugandan Communit...
A look inside the kitchen in Nigerian, Ghanaian and Ugandan homes suggests policy changes that could make cooking more affordable and environmentally friendly. The most popular kinds of stoves...
Challenges and Opportunities to Scaling Up Pay as You Go LPG
There has been a gradual decline in the number of people worldwide who do not have access to clean cooking, with the needle moving from over 3 billion in...
Seven Recommendations for Disseminating Results to Tech4Dev ...
There is a need for improved ethical standards in reporting the results of human-centered research back to participants. The rise of human-centered design and research has improved the field...
Evaluating Household Energy Resources in Rural Kenya
Communities in rural Kenya are still heavily dependent on wood fuel and other biomass for their basic energy needs. Reliance on biomass can lead to health and environmental deterioration:...
Up Is the Way Forward for Wind Energy
The power of wind is perhaps most vibrantly displayed during a community’s kite festival. From India to China, to...
2
Creating Cold: The Chilling Challenge of Off-Grid Refrigeration for Developing Countries
Larry Bentley and F. Andrew Dowdy are trying to solve the problem of refrigeration for off-grid communities in developing...
0
The Value of Off-Grid Solar Energy in Refugee Camps
Kenya is a critical hub for refugees who migrate mainly from the Horn of Africa and South Sudan. Kakuma,...
0
Kenya Introduces the World’s First LPG Smart Metering Standard
The Kenyan Bureau of Standards launched a new standard for LPG (liquid petroleum gas, or propane) metering that represents...
0
Rural Solar Energy Enterprises Can Learn from Mobisol’s Hard-Earned Lesson
Editor’s note: The French utility ENGIE announced that it bought Mobisol shortly after publication of this article. The acquisition...
1
Chakr Raises Rs 19 Crore to Scale Their Emissions Controllers for Indian Diesel Generators
Chakr Innovation and their retrofitted emissions scrubber for diesel generators has raised ₹19 crore (USD $2.7 million) in series...
0
Research Brief: Large-Scale Stove and Water Filter Delivery Is Linked to Improved Children’s Health
A new large-scale trial of clean-burning rocket stoves and water filters in the poorest households in Western Province, Rwanda,...
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India’s Universal Power Supply May Be Only a Subsidy Policy Away
India has almost achieved the historic goal of connecting every household to the electricity grid. The next challenge is...
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Designed: This Air Conditioner for Homes and Offices Uses No Electricity
Evaporative coolers have been known to purveyors of low-cost, sustainable technologies for years. Without the need for electricity, these...
2
Inevitable Change: How Husk Power Embraced Adaptability
After three years of publishing in-depth case studies and essays on global development technology and social ventures, Demand: ASME...
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