Fig.5 After freeze in the temperature inside the vaccine compartment is kept within the design range 0-8 oC. Tamb = 20 oC . Conclusion and perspectives

The SolarChill has been developed in a fruitful co-operation between leading appliance manufacturers and international organisations, setting the desired properties of the product. It has been proven that it is fully possible to run a solar refrigerator without battery or start capacitor, both elements that would decrease the reliability. This opens up for a more general acceptance and dissemination of solar refrigeration, not only in the health sector, but also for commercial or domestic use. Some obvious future applications for this product could be milk chilling, vending booths for food and beverages, recreational purposes or as a grid independent household refrigerator.

Even after an expected WHO approval, there is still basis for optimisation, such as:

— minimisation of the module area for specific climatic regions

— optimisation of the control strategy in order to minimize the needed PV-power

— further simplification and cost reduction of the construction

The authors sincerely wish to thank the sponsors and project partners for their very constructive assistance and participation in this project.

References

PV-POWERED VACCINE COOLER WITH ICE PACKS AS POWER BACKUP Soren Gundtoft, Danish Technological Institute,2003

SOLCELLEDREVET K0LESKAB UDEN BLYAKKUMULATOR (In Danish)

Project report to Danish Energy Agency, Danish Technological Institute, June 2002

Project flyer:

http://www. uneptie. org/ozonaction/library/tech/solarchill. pdf Compressor data sheet:

http://www. danfoss. com/compressors/pdf/product_news/bd_solar_09-03_cx30e302.pdf