Abstract
The aim of the article is to describe the results of an experimental campaign based on the assessment of a heat recovery unit coupled with a dynamic window. Two fully monitored and calibrated outdoor test cells are used, in order to evaluate the energy performance and the related thermal comfort. The former presents a traditional window with double-glazing, aluminum frame and indoor blind and a centrifugal extractor for the air circulation. The latter is equipped with a dynamic window with ventilated and blinded double-glazing provided with a heat exchanger. The connection of the dynamic window and heat recovery unit provides different actions: heat recovery; heat transfer reduction; pre-heating before the exchanger. Different operating configurations allowed the trends of the dynamic system to be assessed in different seasons in terms of energy saving, thermal comfort behavior and energy efficiency. The results showed an overall lower consumption of the innovative system, both in winter and summer, with 20% and 15% energy saving, respectively. In general, the dynamic system provided the best comfort conditions, even if it involves a worse behavior than expected, in the summer season.
Highlights
As consequence of the Energy Performance of Buildings Directive (EPBD) recast 2010/31/CE, more restricted requirements for energy saving in existing and new buildings have been imposed.New buildings have a limited impact on overall energy saving as they represent just a fraction of the whole building stock [1]
The first phase of the test consists of the analysis of the energy consumption of the cells aimed at assessing the energy performance of the dynamic system compared to the traditional
In at assessing the energy performance of the dynamic system compared to the traditional sample
Summary
New buildings have a limited impact on overall energy saving as they represent just a fraction of the whole building stock [1]. The improvement of the energy efficiency of the building stock is an important step in minimizing the environmental impact of modern society. An important role is played by the tertiary buildings, thanks to a major attitude toward changes related to a wide economic vision [6]. In this category, the office buildings are those with highest consumption and CO2 emissions [7]; they represent a starting point to achieve energy improvement
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