scholarly journals A multiple linear regression approach to correlate the Indoor Environmental Factors to the global comfort in a Zero-Energy building

2020 ◽  
Vol 197 ◽  
pp. 04002
Author(s):  
Ludovico Danza ◽  
Lorenzo Belussi ◽  
Francesco Salamone
Keyword(s):  
Air Quality ◽  
High Performance ◽  
Indoor Environment ◽  
Indoor Environmental Quality ◽  
Indoor Environments ◽  
Zero Energy ◽  
Zero Energy Building ◽  
Experimental Campaign ◽  
Regression Techniques

The quality of the indoor environment, in terms of thermal, lighting, air and acoustic quality, grouped in the Indoor Environmental Quality (IEQ) concept, plays a key role in occupants’ wellbeing and satisfaction. Only in recent years IEQ has been investigated as a whole. Today, IEQ occupies the same place of energy efficiency in the design of buildings, especially those with high performance level as the Zero-Energy Buildings (ZEB). The research deals with an experimental campaign during the cooling season carried out in a ZEB laboratory that involved 100 participants aimed at evaluating the IEQ and the indoor environments (e.g. thermal and air quality). The test consists in a survey, during which each participant is required to answer a questionnaire about how he feels the indoor environment. The experimental campaign was completed with a monitoring activity aimed at detecting the main environmental variables that can affect the participants’ answers. Collected data were treated with regression techniques to highlight possible relationships between them. The results show how in a building with high levels of energy performances the air quality plays a key role on occupants’ evaluation.

A weighting procedure to analyse the Indoor Environmental Quality of a Zero-Energy Building

2020 ◽  
Vol 183 ◽  
pp. 107155 ◽  
Author(s):  
Ludovico Danza ◽  
Benedetta Barozzi ◽  
Alice Bellazzi ◽  
Lorenzo Belussi ◽  
Anna Devitofrancesco ◽  
...  
Keyword(s):  
Environmental Quality ◽  
Indoor Environmental Quality ◽  
Zero Energy ◽  
Zero Energy Building

scholarly journals Performance Evaluation of Particulate Matter and Indoor Microclimate Monitors in University Classrooms under COVID-19 Restrictions

2021 ◽  
Vol 18 (14) ◽  
pp. 7363
Author(s):  
Laurentiu Predescu ◽  
Daniel Dunea
Keyword(s):  
Performance Evaluation ◽  
Particulate Matter ◽  
Air Quality ◽  
Indoor Environment ◽  
Indoor Environments ◽  
University Campus ◽  
Particle Counter ◽  
Thermal Environments ◽  
University Classrooms ◽  
Academic Personnel

Optical monitors have proven their versatility into the studies of air quality in the workplace and indoor environments. The current study aimed to perform a screening of the indoor environment regarding the presence of various fractions of particulate matter (PM) and the specific thermal microclimate in a classroom occupied with students in March 2019 (before COVID-19 pandemic) and in March 2021 (during pandemic) at Valahia University Campus, Targoviste, Romania. The objectives were to assess the potential exposure of students and academic personnel to PM and to observe the performances of various sensors and monitors (particle counter, PM monitors, and indoor microclimate sensors). PM1 ranged between 29 and 41 μg m−3 and PM10 ranged between 30 and 42 μg m−3. It was observed that the particles belonged mostly to fine and submicrometric fractions in acceptable thermal environments according to the PPD and PMV indices. The particle counter recorded preponderantly 0.3, 0.5, and 1.0 micron categories. The average acute dose rate was estimated as 6.58 × 10−4 mg/kg-day (CV = 14.3%) for the 20–40 years range. Wearing masks may influence the indoor microclimate and PM levels but additional experiments should be performed at a finer scale.

Economic and Synergistic Pedestrian Tracking System with Service Cooperation for Indoor Environments

2011 ◽  
Vol 2 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Tomoya Ishikawa ◽  
Masakatsu Kourogi ◽  
Takeshi Kurata
Keyword(s):  
Indoor Environment ◽  
Tracking System ◽  
Tracking Performance ◽  
Quality Of Services ◽  
Rfid Tags ◽  
Indoor Environments ◽  
Pedestrian Tracking ◽  
Security Services ◽  
Indoor Pedestrian Tracking

This paper describes an indoor pedestrian tracking system that can economically improve the tracking performance and the quality and value of services by incorporating other services synergistically. The tracking system obtains position, orientation, and action of pedestrians continuously and accurately in large indoor environments by utilizing surveillance cameras and active RFID tags for security services and 3-D environment models for navigation services. Considering service cooperation and co-creative intelligence cycles, this system can improve both the tracking performance and the quality of services without significant increase of costs by sharing the existing infrastructures and the 3-D models among services. The authors conducted an evaluation of the tracking system in a large indoor environment and confirmed that the accuracy of the system can be improved by utilizing the infrastructures and the 3-D models. Synergistic services utilizing the tracking system and service cooperation can also enhance the quality and value of services.

scholarly journals House owners’ experience and satisfaction with Danish low-energy houses - focus on ventilation

2019 ◽  
Vol 111 ◽  
pp. 04006
Author(s):  
Henrik N. Knudsen
Keyword(s):  
Energy Consumption ◽  
Air Quality ◽  
High Performance ◽  
Indoor Environment ◽  
Ventilation System ◽  
Low Energy ◽  
Energy Class ◽  
Single Family ◽  
Environment Temperature ◽  
Low Energy Consumption

The purpose of this study was to evaluate house owners’ experience and satisfaction with the first Danish detached low-energy single-family houses, built according to energy class 2015 before these supplementary requirements became standard for all new dwellings. A questionnaire survey was carried out among owners of newly built energy class 2015 houses. The paper presents the house owners answers to questions on their overall satisfaction, their heat consumption, and their satisfaction with the indoor environment (temperature, draught, air quality, noise and daylight). There is a focus on issues related to having a mechanical ventilation system, i.e. satisfaction with the air quality, does the air feel dry in winter, and does the ventilation system make noise and how the airing behaviour is in winter. As many as 370 out of 869 house owners, corresponding to a response rate of 43%, answered the questionnaire. There was an overall satisfaction with the new low-energy houses. More than 90% of the house owners perceived the indoor environment as satisfactory. The energy consumption was as low as expected by 59%, while only 7% answered that it was higher than expected. Compared with previous similar studies, problems with technical installations have decreased. However, there is a need for continued focus on the commissioning of new and not necessarily thoroughly tested, high-performance installations and new designs. Based on the survey a series of recommendations are given that might help to achieve both a low energy consumption and satisfied occupants of new low-energy dwellings.

scholarly journals Air Enthalpy as an IAQ Indicator in Hot and Humid Environment—Experimental Evaluation

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1481 ◽  
Author(s):  
Michał Piasecki ◽  
Krystyna Kostyrko ◽  
Małgorzata Fedorczak-Cisak ◽  
Katarzyna Nowak
Keyword(s):  
Air Quality ◽  
Thermal Comfort ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Test Chamber ◽  
Indoor Environmental Quality ◽  
Zero Energy Building ◽  
Experimental Function ◽  
Experimental Values ◽  
The Impact

The authors studied the impact of indoor air humidity in the range of 60% to 90% on building user perception in the temperature range of 26 to 28 °C. The research thesis was put forward that the impact of humidity on indoor air quality dissatisfaction of building users in a warm and humid indoor environment is greater than that indicated in thermal comfort models. The presented experiment examined the indoor air quality perception of n = 28 subjects in the test chamber of a nearly zero energy building under ten environmental conditions, together with a thermal comfort assessment. The authors developed an experimental relation for predicting building users’ satisfaction based on the Weber–Fechner law, where the predicted percentage of dissatisfied users (PD) is determined by means of air enthalpy (h), PD = f(h). The obtained results confirmed the sated thesis. Additionally, the intersection points of the experimental function and isotherms resulting from the Fanger model are presented, where the thermal comfort assessment starts to indicate lower user dissatisfaction results than experimental values. The authors recommend the experimental equation for humid air enthalpies in the range of 50 to 90 kJ/kg. The indoor air quality assessment based on the enthalpy value is simple and can be used to determine the overall Indoor Environmental Quality index of a building (IEQindex).

Monitoring of the Inorganic Pollutants in Built Indoor Environment

2017 ◽  
Vol 68 (1) ◽  
pp. 85-89
Author(s):  
Vasilica Vasile ◽  
Alina Dima ◽  
Mihaela Ion
Keyword(s):  
Nitric Oxide ◽  
Air Quality ◽  
Sulfur Dioxide ◽  
Real Time ◽  
Urban Area ◽  
Indoor Air ◽  
Indoor Environment ◽  
Gaseous Pollutants ◽  
Inorganic Pollutants

The paper presents the results of the monitoring of the inorganic gaseous pollutants such as nitric oxide (NO), sulfur dioxide (SO2), ozone (O3), carbon oxides (CO, CO2), from indoor air of four office spaces, located in urban area of Bucharest � Romania, by using the equipment that detected and recorded, in real time, the concentrations of the compounds. The study aimed to obtain useful information on air quality from office spaces, and for the awareness of acute necessity for action to improve the quality of the indoor environment in which we live and work.

Electronic Noses for Indoor Air Quality Assessment

2018 ◽  
pp. 202-223
Author(s):  
Tomasz Majchrzak ◽  
Wojciech Karol Wojnowski ◽  
Tomasz Dymerski ◽  
Jacek Gębicki ◽  
Jacek Namieśnik
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Indoor Environments ◽  
Electronic Noses ◽  
Air Quality Assessment ◽  
Air Control ◽  
Near Future ◽  
Structural Solutions

This chapter presents a proposal of the use of electronic noses in the monitoring of indoor air quality. The main focus is put on the detailed characteristics of today's indoor air quality control methods, the types of pollution in the air, and the development of electronic noses for air testing. Currently, scientists seek methodological and structural solutions that would enable real-time online indoor air control. It has been shown that using electronic noses in this situation is advantageous. In addition, potential uses of these devices are discussed, with particular focus on closed food processing spaces. The authors of the chapter argue that in the near future, the proposed solution could improve the quality of indoor air and thus the health of the users of the indoor environments, as well as the quality of the products prepared there.

Modeling the Thermal Comfort of Internal Building Spaces in School

2014 ◽  
Vol 584-586 ◽  
pp. 761-764 ◽  
Author(s):  
Andrey Volkov ◽  
Artem Sedov ◽  
Pavel Chelyshkov ◽  
Ekaterina Kulikova
Keyword(s):  
Thermal Comfort ◽  
Indoor Environment ◽  
Critical Factor ◽  
Thermal Conditions ◽  
Strong Relationship ◽  
Indoor Environmental Quality ◽  
Highly Sensitive ◽  
Materials Used ◽  
Crucial Part

<p class="p0">Creating a comfortable indoor environment has been one of the mainconcerns when it comes to the design and operation of buildings. Buildings are a crucial part of our daily life, on average people spends 85 % of their time performing activities inside of buildings and therefore the quality of the indoor environment is a critical factor affecting the happiness and productivity of building users.The indoor environmental quality has a strong relationship on the thermal conditions of a space which is directly affected by the amount of heat lost or gained due to the properties of the materials used, the external environmental conditions and the inner sources of heat; In consequence, efforts have to be made to maintain proper thermal conditions by means of using natural and mechanical strategies to provide heating, cooling and ventilation. While the thermal comfort is an important aspect for the average user of a building, it becomes a critical aspect when it comes to population highly sensitive to thermal conditions.</p>

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