Comparison of Thermal Performance of Different Solar Collector Technologies for Solar District Heating Systems Based on Solar Keymark Certificates and SCEnOCalc
Abstract
An easy and standardized method for the determination of the thermal performance of solar collectors is introduced. The method is based on the results published in Solar Keymark certificates and uses the publically available software tool to ensure a high transparency and reliability of the calculation and results. Using this method eight different types of solar collectors, ranging from a standard flat plate solar collector a high performing evacuated tubular solar collector with CPC reflector, are compared with respect to their thermal performance under different temperature levels (50 °C, 75 °C and 100 °C), different collector orientations (tilt and azimuth) and different locations (Stockholm, Würzburg and Athens). The results give an indication which yearly energy yield can be expected from the different solar collector technology at different temperature levels, orientations and locations.
Keywords
Solar collector, Solar keymark, Scenocalc, Yearly energy yield, Standardized method