1. Dr. Gerhard Kunze SolarFrost Research & Development www.solarfrost.com

2. SolarFrost History SolarFrost provides research and development (R&D) services for cooling machines powered by thermal energy, provided by solar collectors, district heating or waste heat. SolarFrost cooling machines replace conventional air conditioning products powered by non-renewable energy sources. Our vision is to make this new technology available worldwide, to the benefit of consumers and the environment 1996Development aid co-operation project in 1996 between Austria and Tanzania to develop a solar refrigeration system for milk 2001Foundation of SolarFrost International Ltd. Company financed by an ecologically motivated fund from Hong Kong 2001-04Various patents for different developments 2004- Nomination for ”The EU Co-operation Award for Sustainable Development” - Finalist for the World Technology Awards 2005- New office and laboratory in Purkersdorf near Vienna - Foundation of SolarFrost Forschung & Entwicklung GmbH

3. SolarFrost Prototypes Classic Tubular Model SolarFrost Cooling Machine with Tubular Heat Exchangers (2kW)

4. Machine with Plate Heat Exchangers

5. Cylinder Machine

6. Ammonia-Absorption-Cooling

7. Bypass System for Low Cooling Temperatures and High Back-Cooling Temperatures

8. Efficiency of „Bypass-System at a Cooling Temperature of 15°C

9. Absorption Heat Recovery in the P-T Diagram pure COP > 1 is possible!

10. Conventional Ammonia Absorption hardly allows Absorption Heat Recovery pure COP < 1

11. Bypass System with Absorption Heat Recovery Combination of Bypass System with Absorption heat Recovery: Theoretical COP at heating temperature 65°C: COP = 1,5 Expected: COP > 1,2

12. Who is SolarFrost? SolarFrost Forschung & Entwicklung GmbH Wienerstraße 69 3002 Purkersdorf Austria Phone: 0043 2231 61812 Fax: 0043 2231 61832 www.solarfrost.com kunze@solarfrost.com mostofi@solarfrost.com diego@solarfrost.com Dr. Gerhard KunzeSigrid MostofiDiego Jendretzki Yüksel SazSt. Thürschweller