Koncentrisani sunčevi toplotni prijemnici za hlađenje zgrada: procene za Grčku

The Greek building sector, and the residential one in particular, are quite energy intensive compared to those in other European countries. According to Eurostat, the specific energy consumption is nearly the double of Portugal and much higher than countries with colder climates as Denmark. Greek building sector accounts for 36% of the total energy consumption, with approximately 65% of it being used for heating and cooling purposes. Greece has a high solar radiation with high sunshine duration and therefore has a strong advantage for efficient solar applications. Solar cooling is a very prom-ising environmental friendly technology as it uses the sun energy to drive adsorption or absorption cooling machines that produce cold water. Moreover the use of concentrating solar collectors leads to significantly higher output temperatures that can enable the use of two stage absorption chillers with a higher COP, thus more efficient in terms of energy yields, less polluting and more attractive in terms of economic evaluation.The aim of this study is to present a technoeconomic and environmental as-sessment of a solar cooling system using concentrating solar thermal collectors for cooling needs in Greek buildings. The analysis was conducted for a typical case of a block of flats located in Athens, Thessaloniki and Heraclion/Crete.The study to be presented in the paper aims to enhance the penetration of such systems in the Greek market and to broaden the applications of solar thermal technology beyond their established domains in general.