A Highly Efficient Collector for Small Solar Energy Installations

摘要

Project objective is the development of high efficient collectors to be used for small solar powered facilities (solar cooling processes and solar powered facilities for mechanical or electric energy production). A series of preliminary investigations and laboratory tests have been performed, which form the basis of collector designs. Due to the results of the performed tests it was decided to develop vacuum flat plate collectors instead of concentrating on collectors as an alternative version in this special form of applications. The function of this collector is different, as the working medium is evaporated within the collector itself; the collector is an evaporator. Different designs have been planned and investigated. Prototypes of direct evaporation collectors have been constructed and tested. The test results of the prototype correspond to the calculated values. In the temperature range forseen for this application (130 - 150C), the collector efficiency is about 40 - 50%.