Program Title : EWB-HK Humanitarian Engineering Challenge - Clean CookStoves
Date : Start from Oct 2013 – Until Now
Location : Hong Kong
Partner organization :

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Work Requirement : -
Application deadline : -
Brief Information :

EWB-HK Humanitarian Engineering Challenge 
EWB-HK Humanitarian Engineering Challenge (HEC) is a pilot design team to tackle humanitarian problems through engineering means and appropriate technology. From 2013, HEC has been focusing on clean cook stoves to alleviate household air pollution resulting from inefficient solid fuel cook stoves. 
 

Figure 1. Group Photo in Maker Fair


Humanitarian Engineering Challenge – Clean CookStoves
According to a report from World Health Organization, there are almost 3 billion people suffering from household air pollution (HAP), resulting in over 4 million deaths each year. 

 
Figure 2. Global Alliance for Clean Cookstoves


Therefore, the United Nations has identified clean cooking solutions as a high impact opportunity (HIO) to tackle in their strategic plan in recent years. EWB-HK thus launched the “Humanitarian Engineering Challenge – Clean Cook Stoves” to echo the HIO and provide clean cookstoves to the under-served community. EWB-HK is now a registered partner in the Global Alliance for Clean Cookstoves committed to promoting clean cook stoves and building an Open Source Cook stoves Library (OSoCooL) for massive DIY deployment.


HEC Mission and Vision
1. Introduce the public to worldwide household air pollution
2. Make use of appropriate technology to design clean cookstoves 
3. Promote DIY approach to achieve massive deployment of clean cook stoves
4. Develop Open Source Library OSoCooL to share HEC designs 
5. Approach the under-privileged to tackle household air pollution


Scope of works
Project execution of HEC is through the functional groups focusing in five aspects which are Library development, technical development, workshop and learning network, commitment and international outreach, events and activities. Details are described in the following.
1. Library development
• Develop an open source library to support easy design and DIY deployment
• Develop project management framework for library growth

2. Technical development
• Develop cookstoves and related designs with identifiable advantages and suitable for massive DIY deployment
• Identify and develop suitable performance testing protocols
• Conduct appropriate tests for designs entered into the library
• Compile project and design  documentation

3. Workshop and learning network
• Develop workshop material to enable training of people with the open source design environment and Do-It-Yourself construction methodologies
• Conduct workshops to equip people to become clean cookstoves designers and implementers
• Develop a network of trained people for further involvement in clean cookstoves and a proficiency framework to manage the network of people.

4. Commitment and local / international outreach
• Connect with local NGO, academia, and industry to collaborate on different aspects of the project
• Check if our activities are aligned with our commitment to deliver the library for massive DIY deployment by 2016
• Connect with international partners to collaborate on the library development and deployment of clean cookstoves and related activities

5. Events and activities
• Organize event and activities to support development of the library and its active deployment
• The scope covers publicity, public education, networking and backend support


Past Actions (2014 – 2015)
HEC has organized and participated in a series of events to introduce the ideas of humanitarian engineering issues to the public since 2014. The events included service trip, workshops, exhibitions, talk and Fair. Through these activities, HEC has collected positive feedback from the general public, education institutes and technical groups. HEC aims to solve humanitarian engineering issues by DIY approach and open source designs.
1. GanSu Service Trip co-organized by EWB-HK YMG and HKPA (July 2014)

• Renovated the village school
• Improved the living of the locals
• Provided clean cookstoves

 
Figure 3a. Fabrication of solar stove in Gansu service trip
 
Figure 3b. Group photo with local students


2. Hong Kong Mini Maker Fair in PolyU (Oct 2014)

• Introduced the public to worldwide household air pollution
• Promoted humanitarian engineering  issues to the public
• Exchanged ideas and build a network with local makers
 
Figure 4a. Exhibition in Poly U Maker Fair
 
Figure 4b. Exhibition in Poly U Maker Fair


3. Giving a Talk in Ju Ching Chu Secondary School (元朗裘錦秋中學) (Nov 2014)

The presentation topic was Humanitarian Challenges are Sources of Innovation
 
Figure 5a. SC gave a talk to students
 
Figure 5b. Student raised a question in the talk


4. Innocarnival in Hong Kong Science Park (Nov 2014)

• The theme was “Technology for a Better Living”
• Introduced the public to worldwide household air pollution
• Promoted humanitarian engineering  issues to the public

 
Figure 6a. Booth in Innocarnival in HK Science Park
 
Figure 6b. Solar Stove Prototype


5. Workshop in King’s College (April – June 2015)

• Developed workshop material to enable training of people with the open source design environment and Do-It-Yourself construction methodologies
• Raised the awareness of students and teachers to worldwide humanitarian engineering issues
• Introduced the students and teachers to worldwide household air pollution
 
Figure 7a. Workshop in King’s College
 
Figure 7b. DIY by students


HEC OSoCooL Library – Clean Cookstoves
HEC is a pilot design team to create designs for humanitarian engineering projects. HEC is developing an open source library, namely OSoCooL library to develop, collect and share designs for humanitarian engineering projects. Those designs will be available and adjusted for specific purposes in different EWB-HK projects or projects co-organized with other organizations. 

HEC has been focusing on the design of three types of clean cookstoves which are solar stove, alcohol stove and rocket stove. OpenSCAD, a free software, is used for creating solid 3D CAD models to facilitate DIY design works. OpenSCAD provides two main modelling techniques: First there is constructive solid geometry and second there is extrusion of 2D outlines. It also enables clash analysis, idea illustration and design documentation. At the same time, prototypes are produced for testing to verify our design ideas and assumptions. 

As 3D printing technology is evolving, HEC has identified the potential to integrate 3D printing technology with humanitarian engineering to create tailored-made designs. It is not just used for printing the whole designs. More importantly, 3D printing is the bridge to link materials, tools and designs available in the market through developing tools and connecting parts. It is believed that this innovative idea will be a powerful tool for HEC development. 
 
Figure 9. 3D Printing Technology

Until now, HEC has designed a number of clean cookstoves which have distinctive features and advantages. Brief introduction is given below.

1. Solar Stove
A concentrator assembly based on concentric conical reflector rings and a hexagonal support structure allows easy DIY production and weighs only a few kg. This light weight structure makes sun track with clockwork mechanism easy to implement, which in turn enables heating a fixed spot a few hours a day for thermal storage or electricity generation. The adaptive design incorporates advanced features at modest cost. The power of the solar stove with reflecting area about 3 m2 is 1800W. DIY tools are designed to facilitate making solar stove.
 
Figure 10a. 1:1 Solar Stove

 
Figure 10b. 3D model of Solar Stove by OpenSCAD
 
Figure 10c. Solar Stove Prototype for demonstration


 
Figure 10d. 3D model of Solar Stove by OpenSCAD (Dimensions shown)


 
Figure 10e. 3D model of Solar Stove by OpenSCAD (Dimensions shown)
 
Figure 10f. Ring Cutter for Solar reflector (made by 3D printing parts and existing available tools)


 
Figure 10g. DIY tools for making solver reflector: Ring Cutter 


2. Rocket Stove
HEC uses fire panel as chimney to eliminate external insulation wall and fine tune chimney for more complete combustion. Rocket stove is adapted for massive DIY deployment. It can reduce air pollution, improve efficiency, save fuel and easy to be copied. Its power is up to 2000W. Alternatively, HEC is proposing to use lego bricks to simplify the construction process for brick rocket stoves. 


Figure 11a. Rocket Stove

 
Figure 11b. 3D model of Rocket Stove by OpenSCAD (View 1)


 
Figure 11c. 3D model of Rocket Stove by OpenSCAD (View 2)


 
Figure 11c. 3D model of Rocket Stove by OpenSCAD (View 3)
 
Figure 11d. Lego Bricks for Rocket Stoves


3. Alcohol Stove
HEC makes use of softdrink cans to produce low toxic emissions and high efficiency alcohol stove. It is easy to be DIY. The power of an alcohol stove can be specially designed. DIY tools are designed to facilitate making alcohol stove.

 
Figure 12a. Alcohol Stove, 1st design
 
Figure 12b. Alcohol Stove, 2nd Design
 
Figure 12c. Alcohol Stove, 2nd Design
 
Figure 12d. 3D model of Alcohol Stove by OpenSCAD, 1st Design
 
Figure 12e. Parts of 3D model of Alcohol Stove by OpenSCAD, 1st Design
 
Figure 12f. DIY tools for making alcohol stove: Body Cutter with an aluminum can 
 
Figure 12g. DIY tools for making alcohol stove: Pin Drilling Jig
 
Figure 12h. DIY tools for making alcohol stove: Pin Pusher


Upcoming Actions
In the near future, HEC will continue to work on this global issue and start some new tasks.
1. Carry out “Hackathon” sessions to prototype workable solutions for people in need. Basically, each Hackathon is an intensive interaction of engineers, makers, and application user representatives working over a weekend to translate user needs into functioning prototypes.

2. Release α-version design package of clean cookstoves soon. The package consists of 3D CAD files and animation to illustrate how our designs are.

3. Launch pilot scheme with another NGO to bring HEC designs to the under-served community under their service network.

4. Cooperate with HKU Computer Science department to enhance 3D CAD and 3D printing methodology for HEC.


HEC – Future Challenges 
Until now, HEC has faced many challenges in different aspects, especially deployment issue, project management and IT infrastructure. We will continue to tackle these challenges to put HEC forward. The anticipated challenges are briefly explained here.
1. Deployment
• Building stable deployment site relationship for continuous improvement
• Multi-function task force and solution brain storming methodology
• Efficiency and other performance characterization
• Efficient DIY production scheme for whole village

2. Project Management
• Recruitment and stakeholder engagement 
• Team capability development and strategic partnership
• Brainstorming method: Hackathon, mind-mapping, competition
• Project planning and event organizing

3. IT infrastructure
• Open Source Library portal, Wiki, forum and social media strategy
• 3D design and DIY construction tutorial document and video
• Feedback and field experience database


Useful Websites
If you want to get more information about household air pollution due to unclean cookstoves and HEC, you may visit the following websites. 
1. Global Alliance for Clean CookStoves
2. Humanitarian Engineering Challenge - Clean CookStoves 2015 Facebook
3. Engineers without Borders (Hong Kong)


Contact Us
If you are interested in our open source library, please feel free to contact us. We will send you α-version of design package through email. If you have any inquiries or you are interested in our project, please contact us via email ngaihungwong@ewb.hk (Derek Wong) and scmok@ewb.hk (SC Mok). Let’s join us!


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