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Environmental parameters assessment of a new diffuser for air cooling/heating system:Measurements and numerical validation

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Building Simulation 2022年第6期15卷 1111-1132页

作者： fabio Nardecchia Laura Pompei fabio bisegna Department of Astronautic Electric and Energy EngineeringSapienza UniversityVia Eudossiana 18RomeItaly

Air distribution of HVAC systems is the most popular type used in the building sector,having a relevant impact on indoor air quality and occupant *** types of research developed optimal solutions for the HVAC system’s design,focusing on specific components of the distribution system,on the airflow and geometry of ducts,on the size of ducts,on the shape and position of air ***,few works in literature proposed a globally experimental and simulation analysis of an air distribution system with a variable mass flaw *** this line,the presented research investigates the potentialities of a new ceiling diffuser,installed in an exhibition *** system provides a variable mass flow rate thanks to its configuration,providing adequate thermal comfort.A warm wall is chosen as the heating *** tests are carried out,six for cooling and two for heating with different volumetric air rates and supply air temperature of the *** combination of two methods,the measurement campaigns and the computational fluid dynamics(CFD)technique represent a suitable approach to examine the thermal indoor *** general,results show a strong capability of this diffuser to provide a uniform temperature and velocity field inside the ***,experimental and numerical data are significantly comparable with an average deviation of 1%for the velocity and lower 1%for the temperature,guaranteeing an optimal distribution of the understudy environmental parameters on the vertical and horizontal planes.

关键词： environmental parameters CFD field measurements INDULINE HVAC systems thermal comfort

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Emotional evaluation of lighting in university classrooms:A preliminary study

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Frontiers of Architectural Research 2018年第4期7卷 600-609页

作者： Nuria Castilla Carmen Llinares fabio bisegna Vicente Blanca-Gimenez Dpto.Construcciones Arquitectonicas Universitat Politecnica de ValenciaCamino de Veras/nValencia 46022Spain Instituto de Investigacion e Innovacion en Bioingenieria i3BUniversitat Politecnica de ValenciaCamina de Veras/nValencia 46022Spain Dept.of Astronautical Electrical and Energetic Engineering (DIAEE)SAPIENZA University of RomeVia Eudossiana 18Rome 00184Italy

In educational environments an improvement in the quality of interior lighting has a direct benefit in increasing productivity and alertness of students and teachers, as well as very important implications for the energy efficiency of the education facilities but when a replacement with different lighting is analyzed, research may be tarnished by users’ pre-formed opinions, influenced by manufacturers and advertising. Consequently, it is necessary to understand the users’ point of view, even before of being subjected to any change in the lighting *** on the Kansei Engineering framework, the general objective of this paper is to evaluate and compare the subjective evaluation of students’ pre-formed opinions to lighting provided by two types of lamps (fluorescent and LED). The subjective assessment of 427 university students has been compared over four years. The results show significant differences in students’ subjective evaluation. This finding highlights the existence of symbolic or functional attributes of the usefulness perceived by the student that could influence on investigations in which different types of lighting are compared.

关键词： Kansei engineering Lighting Fluorescent LED Subjective assessment University classroom

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