Abstract
Energy saving in buildings is one of the main priorities of the last years. To reach this goal, the optimization of the building envelope and plant-systems with high energy performance are necessary. This work looks at the use of the air-handling unit based systems for heating and cooling of residential dwellings characterized by high thermal insulation level. A plant system based on a new concept of air-handling unit is analyzed by means of experimental analysis carried out in a real common apartment, named DemoLab and realised near Padova (Italy). This system provides both the heating and cooling thermal loads. The research outlines the analysis of the test measurements carried out in the laboratory, focusing on the profiles of air temperature, humidity and CO2 rate in several points and different rooms. As result, the analysis verified the control strategy implemented in the investigated plant system to improve the indoor environmental quality inside the building. Finally, the new system was also analysed in different climatic conditions by means of transient computer simulations implementing the current control strategies.
Highlights
Efforts to reduce carbon emissions have become an important challenge of the last decades
Residential buildings account for about 27% of global final energy consumption and about 17% of global carbon emissions [1]
The Energy Performance of Buildings Directive (EPBD) outlines that all the new buildings must be nearly zero energy buildings (NZEBs) by the end of 2020
Summary
Efforts to reduce carbon emissions have become an important challenge of the last decades. The retrofitting of the existing buildings represents the greatest challenge as it can provide a high potential of reducing energy consumption improving the quality of buildings’ envelopes or using energy-efficient heating and cooling technologies. Another important issue regards the quality of the indoor environment. Ventilation to remove the indoor air involves a thermally comfortable indoor environment; an insufficient ventilation rate is associated with health problems such as inflammation, respiratory infections, asthma, allergies and sick building syndrome [5] In this context, mechanical ventilation systems offers several advantages but it consumes energy and can be noisy
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