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The abundant sunshine in subtropical area presents an important energy source. In this paper, various daylighting design strategies were studied comparatively. The experimental investigation indicated significant energy saving results, ranged from 20% to 30%, as compared with the conventional electrical lighting system. Furthermore, the dimmer control system provides uniform indoor illumination level while saving energy, and has great application potential.

Thermal storage air-conditioning system is very efficient in shifting peak cooling demand to off-peak hours. In this paper, a passive strategy is analyzed, which accomplishes load shifting and peak-cut through precooling and air-conditioning rescheduling operation. The simulation result indicated successful load shifting can be achieved with around 20% of peak-cut, at no significant indoor thermal comfort sacrifice. The operation strategy proposed in this paper and the simulation procedure could become a powerful analytical tool for building - energy conservation.