Abstract
Abstract Passive energy efficient design in dry climates with high heliophany can lead to a significant reduction in energy use while promoting occupant comfort. This paper presents an optimization in the performance of an office building with mixed-mode run, including night ventilative cooling and shading devices strategies to achieve nZEB requirements in summer. The building design integrates an efficient envelope and renewable energy generation from PV panels on-grid. On-site measurements were taken to collect hygrothermal data and energy demand information. Two office configurations were discussed, Open plan (PL2) and Individual office (BOX NW), both options with a high trend to overheat. For all orientations tested, multiple horizontal overhangs have better performance than vertical ones. Results from Net Energy Balance in Base model present a primary energy demand of 116 kWh/m2/year and the Optimization model of 55 kWh/m2/year. To conclude, the positive impact of the implementation of passive design strategies rises the comfort hours in use period in PL2 70% and in BOX NW a 55% and a decrease of 60% of primary energy demand.
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