THE CONSTRUCTION DESIGN OF HEAT EXCHANGERS OF THE PARABOLIC TROUGH SOLAR COLLECTOR

Solar energy has a lot of possibilities of utilization for energy purposes. The Research centre of University of Zilina together with Department of power engineering deal with the utilization of solar energy with a special type of solar collector - parabolic trough solar collector. The task of research is proving the possibilities of using this type of collector in northern part of Slovakia - Zilina region. The subject of research was design the parabolic trough solar collector with an absorption area 10.25 square meters. There is a heat exchanger situated in a focus of solar collector. This paper deals with design description, development and innovation these kinds of heat exchangers in order to progressive decrease of thermal losses and increase of overall system efficiency. These focal thermal exchangers are designed so that they can be removed from the parabolic trough solar collector. For every type of focal heat exchanger is working medium pressed air. There are three types of focal thermal exchangers described in this paper.