The Use of Solar Collectors in Domestic Hot Water Systems in Central and Eastern European Countries: Simulation in TRNSYS

Abstract Solar collectors are devices that enable the use of solar radiation, e.g., for hot water preparation or space heating. They playing an increasingly important role in Europe and around world, mainly due to easy availability sun, as energy source. The advisability their depends on a number factors, which climatic conditions extremely one. This paper presents results simulations collector-based domestic system capitals five selected Central Eastern European Countries (CEEC): Riga, Warsaw, Prague, Bratislava, Zagreb. Using TRNSYS software, theoretical model was developed dynamic were carried out entire year. amount useful generated by flat-plate collectors, efficiency, well auxiliary requirements needed meet load estimated compared. extent changing area collector affects operation efficiency different locations also analysed. showed terms is most favourable placed southernmost Croatia Slovakia, where it achieved lowest annual demand. least location turned be Riga. It worth noting regardless location, has significant impact system.