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
5. Manufacturing, tests and improvements
To date, this project is on hold for manufacturing
The purchasing, prototype manufacturing, testing, and documentation updating sub-processes, will be developed once the manufacturing stage is executed
6. Certification DIN Spec 3105
- Verification of the completeness of the documents:
- * Parts list
- * Drawings of all parts and assemblies
- * Assembly instructions
- * Optional documents, technical notes
- * These formal aspects have been verified, the project meets them satisfactorily
- Assignment of reviewers
Search and assignment of peer-reviewers with sufficient expertise:
- Peer-reviews
Realization of the peer reviews, technical clarification, improvements:
- In the Parts list section, necessary comments and discussions have been made by the assigned reviewers and the developer
File:Oho cs14 attestation solar-cooker-1-4m.pdf
- Certificate
Issue of the certificate:
The project was reviewed by two reviewers from the OHO team. The review consisted of the following components:
- * Completeness check: Checks if all required documents have been submitted.
- * Review of the submitted documents: Checks if the information in the submitted documents is complete and correct.
- - Bill of materials
- - Are all parts and assemblies covered?
- - Are all quantities correct?
- - Are all required material specifications available?
- - Are all specifications for purchased parts and standard parts complete?
- * Technical drawings
- - Are all the required views available?
- - Are all required dimensional data available?
- * Suggestions for improvement
Detail abot the review process: https://en.oho.wiki/wiki/Instructions_for_Reviewers
Permanent Link: https://en.oho.wiki/index.php?title=Solar_Cooker_-_diameter_1.4m&oldid=45841
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