CALCULATION OF COOLING LOADS FOR DIFFERENT SOLAR SHADING DEVICES IN SWEDISH OFFICES USING THE SOFTWARE PARASOL V 2.0 AND COMPARISON OF CALCULATED AND MEASURED G-VALUES

摘要

The Solar Shading Project at Lund University has been investigating the performance of solar shading devices, both through measurements and by developing the software ParaSol intended as a tool for consulting engineers and architects. This paper will investigate the performance of various shading devices in offices using the software ParaSol v 2.0. Further, it will estimate the annual heating and cooling demand, and peak power savings in Swedish offices depending on different solar shading devices and orientations. The external shading devices yield the lowest g-values and cooling loads while the internal devices yield the highest g-values and cooling loads. The performance of the interpane devices are somewhere in between the performance of the external and internal devices. Simulations in ParaSol correspond fairly well to the outdoor measurements. Simulations are performed in ParaSol to estimate the g-value and energy balance for external and internal solar shading devices. The results are compared to outdoor measurements of the same solar shading devices. The effect of the following parameters is estimated: solar shading devices, orientation and climate. ParaSol is a user-friendly interface that rather accurately can predict the heating and cooling demands, and g-values for solar shading devices used in offices.