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Verifica sperimentale di un sistema di ventilazione controllata dalla domanda
Experimental verification of a demand-controlled ventilation system


L. Schibuola1, M. Scarpa1, C. Tambani1

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Abstract

The recent energy legislation has imposed a significant increase in the thermal insulation of the envelope for new and renovated buildings. Vice versa, the growing attention to indoor air quality is leading to a greater requirement of renewal air per person at standard level. Consequently, the share of energy consumption for the treatment of ventilation air com- pared to the total one for heating and air conditioning can become particularly significant. It is therefore necessary to use appropriate technologies to reduce this quota in particular for the achievement of the ZEB objective. Among these, especially in the case of buildings characterized by variable crowding, the use of ventilation systems controlled by real presences can be very effective. This paper presents an assessment of the annual performance of a demand controlled ventilation (DCV) system based on CO2 sensors able to verify the actual crowding. The case study refers to a university library. The analysis obtained by monitoring shows consistent energy savings compared to a corresponding ventilation system with constant air flow rate, but also characteristics and problems of the regulation that are very different from those usual in the control systems of the indoor thermo-hygrometric conditions

Keywords

Demand controlled ventilation, energy saving, monitoring, indoor air quality

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