A refrigeration facility for milk cooling powered by photovoltaic solar energy

摘要: The use of renewable energy sources is usually a reliable alternative in rural areas and developing countries, where the grid line does not exist or at great distance. In this work, characteristics working conditions refrigeration facility designed for cooling down an expected daily production 150 l milk are analyzed. stand-alone, direct-coupled system 20 photovoltaic modules, 120 Wp each, power two permanent magnet, direct current motors 24 V, 650 W. Each motor drives separate compressor, which provides flexibility to operate equipment with one various interconnections PV depending on available irradiance level thermodynamic state system. obtained during daylight hours stored form sensible latent heat frozen water tank surrounding container. Thermodynamic analysis shows that autonomy 2·5 consecutive cloudy days if ice 80% nominal capacity water/ice tank. Results efficiency similar those by other commercial facilities powered array, including batteries. Copyright © 2003 John Wiley & Sons, Ltd.