Optimization of Night Ventilation for Energy Savings in an HVAC Systems for Summer Climatization

M. Manzan, F. Pinto (University of Trieste), O. Saro (University of Udine)

Today the use of air conditioning systems in both office and residential buildings in industrialized countries is constantly growing. This represents a major factor in causing high peak electricity demands during working hours.This trend leads to a significant increase in primary energy consumption required for space climatization and energy saving strategies must be sought in order to guarantee healthy conditions with a sustainable environmental impact.

To this content a MOGA optimization has been performed on a climatized part of a building. Different parameters have been selected to assess the performance of night ventilation. The goals are the energy savings for the plant system and the minimization of fan energy. The results show that night ventilation can be a viable strategy for reducing overall energy consumption and the use of genetic optimization has proved to be an helpful tool for analyzing problems with conflicting objectives