Freescoo Facade 3.0, a Compact DEC Thermally Driven Air-Conditioning System for Apartments
Abstract
Freescoo is an innovative Desiccant Evaporative Cooling (DEC) air conditioning system designed for ventilation, cooling, dehumidification and heating of buildings in residential and tertiary sectors. This paper presents the third generation of the system which is planned to be tested on field in Milan (Italy) within the Merezzate+ project supported by Climate-KIC. The adsorption bed used by the system is a finned heat exchanger packed with silica gel grains, which allows simultaneous dehumidification and cooling of the process air. The indirect evaporative cooling process, operated downstream to the dehumidification, is realized using an optimized heat exchanger. Low wet bulb temperatures reached on the secondary flow, allow supply air temperatures to the room below 20°C. The regeneration of the adsorption bed is done through low grade heat around 60 °C and the only electrical consumption is for the fans and water recirculation. The unit has been designed in order to be integrated in the loggia of small apartments of roughly 45 m2. The final result is an Energy Efficiency Ratio (EER) around 14 and a cooling power up to 2.5 kW per unit.