Personal ventilation (PV) is a solution that enables user to attain full satisfaction from the indoor conditions. It also system that—if properly designed—can contribute energy efficiency in buildings (i.e., by supplying considerably lower amounts of fresh and treated air indoors). In order test possible variants local heating cooling human body PV system, series tests was conducted. The were performed on thermal manikin aimed determine which type setting direction supply temperature...

This paper presents the results of investigations whose aim was to describe influence pressure difference level on ability contaminants migration between neighbouring rooms in dynamic conditions associated with door swing. The analysis based airflow visualization made cold smoke, which simulated heavy contaminants. test room pressurized a specific and then opened observe trail smoke plume plane door. both directions: positively negatively room. study focuses discharge an uncertainty is not...

Thermal comfort of people using personalized ventilation system is affected by the amount air and terminal devices. However impact small changes in device's geometry alone has not been examined assessed. The aim current article was to compare thermal sensations productivity users who used three kinds devices with similar construction (the same size a box, perforated surface inside) differs spacing blinds at outlet device. During measurement volunteers were asked complete questionnaire survey...

As compared to mixing ventilation systems, the personalized system (PV) can help create a healthy and comfortable working environment with simultaneous reduction of energy consumption. This latter aspect should be particular significance for employers investors who bear responsibility office space conditions. The parameter which is paramount interest this group people productivity as it translates into company's revenue. Hence, objective study presented in article was determine conditions...

The aim of this study was to assess the potential applying Background Oriented Schlieren (BOS) technique test temperature limit a non-isothermal ventilation jet used in ventilation. BOS is potentially simple when under real conditions with no optical sets and presence architectural or logistic obstacles. So far, methods higher sensitivity have been for qualitative tests. This examined whether method could be tests heating air-conditioning, where low differences pose challenge. Analyses were...

The study aims to analyze the possibility of periodically introducing work from home during energy modernization university building. A detailed concept was devel-oped in 2017 as part KOD-nZEB project. As a result modernization, primary consumption building is decrease approx. 150 6.2 kW/m2, standard nearly zero nZEB. significant obstacle affecting implementation plan need maintain uninterrupted operation faculty. Based on experiences gained COVID-19 pandemic, hybrid mode work-from-home...

The purpose of this study was to identify the optimal construction an averaging pitot tube and measure flows typical in building ventilation, considering low-velocity flows. should be simple implement variable air volume (VAV) controllers. This paper presents mostly novel constructions, which have not been tested before, fills existing gap measurements, is important correct control with airflow reduction VAV system. Eleven constructions based on a circular section basic element were chosen....