Print Email Facebook Twitter A redesign of Kamworks' solar home system: Increasing efficiency, flexibility and value-for-money Title A redesign of Kamworks' solar home system: Increasing efficiency, flexibility and value-for-money Author Lekkerkerker, R.A. Contributor Reinders, A. (mentor) Verwaal, M. (mentor) Faculty Industrial Design Engineering Department Design Engineering Programme Master of Science Integrated Product Design Date 2011-06-28 Abstract This report documents the redesign of Kamworks’ Solar Home System (SHS), a small autonomous solar system that is designed to meet the electricity needs of families living in Cambodian rural areas. Kamworks is a social enterprise, founded by Dutch entrepreneurs, which tries to provide the local population with light and electricity to stimulate social en economic development of the rural areas. In 2008 Kamworks developed the SHS family consisting out of three system sizes: the 20Wp, the 40Wp and the 80 Wp system. The SHS can be used to power several lights and appliances at the same time and is automatically recharged during the day. Although the Kamworks’ SHS is on the market for two years, the sales are much lower than expected. Kamworks has reasons to think that the value for money ratio is not high enough. Production, installation and maintenance should be made more efficient and effective in order to 1) bring down costs, 2) enable Kamworks to produce faster and 3) to enable Kamworks to sell their systems in more remote areas. The project is split up into four phases. In the Analysis Phase, a substantial part of the time is spent on research on a wide variety of subjects. Surveys and interviews are taken among existing and potential SHS customers, Kamworks employees, and Kamworks’ management. A context analysis, including research to Kamworks ltd., Cambodia, and the target group, has been carried out. And at last the climate and competition have been analysed. In the Design Phase, the results of the Analysis Phase have been used to develop five structural concepts. Design tools, like the Harris-profile, have been used to select the most viable concept. As the Fishtrap-model prescribes, the chosen structural concept served as the basis for the development of four formal concepts. Again a Harris-profile was used to choose the most viable formal concept. In the Detail Phase, the chosen formal concept has been worked out to a production ready product and in the Finalizing Phase, a prototype has been tested and the product design is evaluated. A result of this project is the new design of the Homebox, the main part of the SHS that contains the batteries, a charge controller and other components to connect the lights and external devices. The new Homebox design will be produced out of plastic injection moulded parts and aluminium profiles. These production methods allow for higher production speeds, a flexible design that can be used for the three system sizes, and a high quality product finish at relatively low investment costs. Another result is the design of a plug&play lighting system, which can be used to connect up to seven lights to the Homebox. The new lighting system is an improvement on the original lighting system, because it is less complex and it takes less time, to install in a house. The use of connectors and standard cables enables Kamworks to carry out more installations with less effort. The technical drawings are included with this report, but there are some hurdles in the road to the production of a quality product. Kamworks has to choose the appropriate manufactures of the plastics parts, the aluminium profiles and the lighting system cables. Kamworks has to make sure that the produced parts meet the quality criteria. Especially the fine tuning between the plastic parts and the aluminium profiles needs a good coordination between Kamworks and the manufactures. Subject solarenergycambodiakamworkssustainableSHSsolarhomesystem To reference this document use: http://resolver.tudelft.nl/uuid:364810ff-6377-4eee-a35d-c0b927c9878b Access restriction Campus only Part of collection Student theses Document type master thesis Rights (c) 2011 Lekkerkerker, R.A.