10.07.2015   EUROSUN 2008

Weather data

In order to investigate the potential of solar thermal technologies at a residential scale in Wales, average weather data for the city of Cardiff is used in the simulations. The data used is in TMY2 format and is provided by the weather library of TRNSYS. The TMY2 average year for Cardiff is built in METEONORM, based on measurements from a local weather station [7]. Fig 1 shows the difference between predictions using 30 year average data and the weather data built in

Fig 1. Incident (direct and diffuse) solar energy curves (10m2 collector, 45° tilt South) with ECOTECT data and with 30 year average values given by Page and Lebens.
Подпись: Fig 1. Incident (direct and diffuse) solar energy curves (10m2 collector, 45° tilt South) with ECOTECT data and with 30 year average values given by Page and Lebens .

METEONORM. The values represent the incident solar energy on a 10m2 surface orientated towards south and tilted for 45o in Cardiff calculated with the TMY2 weather data and with average weather data of the years 1941-70[8]. To represent the variations found in real weather conditions, one year data for Cardiff taken from actual measurements from a weather station located at the roof of the Welsh School of Architecture [9] during year 2007 is also used in this study.