Abstract
Transpired solar collector (TSC) systems are simple solutions for the preheating of ventilation air with solar energy. Their performance is a function of several environmental factors, so the climatic conditions of the location play an important role. In this paper, the effect of different climatic zones on the thermal performance of the TSC is investigated. To exclude other sources of influence, the same reference industrial building is examined in four Turkish locations (Antalya, Istanbul, Ankara and Sivas) representing different climatic conditions. RETScreen simulation is carried out for all four regions to obtain the drop of conventional heating requirement in case absorber azimuth of 0°, 45° and 90°. To illustrate the performance, temperature rise, heating energy savings and annual solar fraction are presented. Generally, it can be stated that a location with cold climate and high solar radiation at the same time benefits most from the use of a TSC system. A mathematical correlation has been found showing the solar fraction's dependence on solar radiation and heating degree days. Finally, simulation results have been compared to a set of measurement data from an industrial building's TSC system near Istanbul.
Highlights
Turkey is one of the world's leading countries regarding the area of solar thermal collectors installed with 4 million m2 and 7.1 GWth energy benefit [1]
Since 1991 several international studies have emerged investigating the thermal performance of the transpired solar collector, as the use of alternative energy sources requires optimized exploitation of the energy potential [4]
The current study provides transpired solar collector researchers with yet missing information by presenting simulated results different Turkish climatic zones compared to data from the monitored Transpired solar collector (TSC) system of an industrial building near Istanbul
Summary
Turkey is one of the world's leading countries regarding the area of solar thermal collectors installed with 4 million m2 and 7.1 GWth energy benefit [1]. The ranspired solar collector is greatly suitable for the solar heat supply of industrial buildings reducing fossil energy use. Since 1991 several international studies have emerged investigating the thermal performance of the transpired solar collector, as the use of alternative energy sources requires optimized exploitation of the energy potential [4]. Li et al [7] presented a mathematical model based on energy balance equations for the performance prediction of a TSC with slit-like perforations. Eryener and Akhan [8] investigated the opportunity of integrating a capillary radiant heating system onto the back plate of the unglazed transpired collector, to supplement heating energy for conditions with low solar radiation. Later Akhan and Eryener [9] reported about the combination of a TSC with a waste heat utilization system on the production hall of an automotive company in Turkey
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