Based on the DIN 2221 standard, among others, OHO has established a series of stages in which the satisfactory completion of this project was carried out
1 Feasibility study
Manufacturing as OSAT technology is possible?
- Required materials and components can be sourced or replaced locally?
- ✓ Yes,
- All the materials can be found in local environments, in the case of the reflective coating it may be necessary to purchase it online, however it is not a material that is difficult to access
- Required manufacturing processes can be povided locally?
- ✓ Yes
- This is a type of project that is normally developed with local technologies, no specialized knowledge or complex equipment is required to manufacture this cooker
- Is specific training for manufacturing necessary and can be provided?
- ✗ No
- No specific training is required for the execution of this project, only general knowledge about workshop processes
- Do all materials and processes meet the sustainability criteria?
- ✓ Yes
- The product and its production process can be considered as sustainable
2 Market analisis and requirements Functional and quantitative requirements
Functional and quantitative requirements
- Analysis of the current products on the market:
- GDAE10 Portable Solar Cooker, 1800W 5ft Dia Outdoor Camping for Solar Heating, Visual Education or DIY Solar Concentrator 59" Dia
- * Price [USD]: 120
- * Source: amazon
- * Country: USA
- * Machine condition: New
- * Indicated power [W]: 1800
- * Maximum temperature [°C]: 350
- * Reflective area [m2]: 1.7
- Deluxe Portable Solar Oven with Complete Cookware, Thermometer and Dehydrating Rack by Sunflair
- * Price [USD]: 160
- * Source: amazon
- * Country: USA
- * Machine condition: New
- * Maximum temperature [°C]: 140
- Sun-Mitra Square Shape Solar Cooker, 525X525mm
- * Price [USD]: 94
- * Source: amazon
- * Country: India
- * Machine condition: New
- * Maximum temperature [°C]: 200
- * Reflective area [m2]: 0.28
- MrMapMax Portable Solar Stove 4.5L Large Capacity Outdoor Solar Oven Camp Stove with Thermometer for 2-3 People Backpacking Hiking Family Party
- * Price [USD]: 240
- * Source: amazon
- * Country: USA
- * Machine condition: New
- * Indicated power [W]: 200
- * Maximum temperature [°C]: 288
- * Reflective area [m2]: 0.13
- Requirements definition
Definition of the main technical data:
- Power [W]: 1000
- Maximum temperature [°C]: 200
- Reflective area [m2]: 1.5
- Optimal functions and features
Definition of necessary/optional functions and features:
- Includes mobile support structure: Mandatory
- Solar orientation indicator: Mandatory
- Made with durable materials: Mandatory
3 Search & analisis DIY technologies
The best technical solutions for all parts and components
- Customization of the OHO search engine
- Since it is a highly known product in the DIY sector, our repository has several examples within the category of solar cookers
- Manual search in Google, Youtube, special websites etc.
- * Title: DIY solar cooker from scrap.. how to make solar parabolic dish
- * Views: 54000
- * Likes: 630
- * Comments: 60
- * Detail: Parabola with radial segments, cardboard shell
- * Title: How to make a simple solar cooker to understand the use of solar energy
- * Views: 2200000
- * Likes: 16000
- * Comments: 909
- * Detail: Box model
- * Title: Parabolic Satellite Dish Conversion - Solar Cooker
- * Views: 2300000
- * Likes: 17000
- * Comments: 1036
- * Detail: Recycled antenna disc
- * Title: How to make a solar cooker using mirror
- * Views: 17000
- * Likes: 281
- * Comments: 19
- * Detail: Mirror coating
- * Title: Building instructions for a solar cooker 1,400 watts (part 3 of 4)
- * Views: 9000
- * Likes: 25
- * Detail: Parabola with conic segments
- * Title: How to Make Copenhagen Solar Cooker
- * Views: 30809
- * Likes: 420
- * Comments: 43
- * Detail: Panel template or Copenhagen
- * Title: Vajra Solar Cooker Project Nepal
- * Views: 12000
- * Likes: 101
- * Comments: 9
- * Detail: Reference equipment, Semi-industrial design
- * Title: How to build a solar cooker with parabolic reflector part 3
- * Views: 1770
- * Likes: 797
- * Comments: 47
- * Detail: more info here
4 Development and documentation
Plans and specifications of all parts and components
- Analisis of functions & structures
- Analysis of functions, assemblies and components
- Based on the model taken as a reference, the necessary assemblies were devised to make up the equipment, with the following premises:
- * Parts made of metal
- * Parabolic disk of radial segments
- * Reflective surface integrated into the pieces (without glued paper or mirrors)
- * Support structure with wheels to facilitate continuous orientation
- Development of technical solutions for assemblies and parts
- A review of the different options adopted in the DIY machines was carried out to meet each design requirement, observing the following variants for some evaluated details:
- * Evaluated detail: Main design
- * Evaluated detail: Reflective coating
- Although there is no reference in this regard, it is proposed to use a chrome paint to achieve the reflective surface, a commercial reference is specified in the technical notes
- See related comments: Discussion
- Creation of plans, parts lists, assembly instructions
- Once all the necessary information was available, the project plans were prepared
- Peer-Reviews by the community, team members, experts etc.
- Among some revised and improved aspects of the project, prior to the publication of the plans, we can mention:
- * Simplified design of the parabolic segments, achieving a very precise shape only by matching the rivet holes between adjacent segments
- * Inclusion of a circular strap to give strength to the plate and better hold the clamps
- * Simplification of the structure with welded and complete profiles
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