scholarly journals Analysis of Indoor Environment in Classroom Based on Hygienic Requirements

2016 ◽  
Vol 24 (2) ◽  
pp. 16-22
Author(s):  
Miroslav Javorček ◽  
Zuzana Sternová
Keyword(s):  
Mathematical Model ◽  
Elementary School ◽  
Air Temperature ◽  
Indoor Environment ◽  
Co2 Concentration ◽  
In Situ Measurements ◽  
Environment Quality ◽  
Indoor Environment Quality ◽  
The Difference

Abstract The article contains the analysis of experimental ventilation measurement in selected classrooms of the Elementary School Štrba. Mathematical model of selected classroom was prepared according to in-situ measurements and air exchange was calculated. Interior air temperature and quality influences the students ´ comfort. Evaluated data were compared to requirements of standard (STN EN 15251,2008) applicable to classroom indoor environment during lectures, highlighting the difference between required ambiance quality and actually measured values. CO2 concentration refers to one of the parameters indicating indoor environment quality.

scholarly journals Experimental study on indoor environment quality in a naturally ventilated classroom of a university using natural ventilation and ventilation fan

2020 ◽  
Vol 165 ◽  
pp. 04082
Author(s):  
Jie Zong ◽  
Wenjun He ◽  
Lingna Wang ◽  
Hongkai Chai ◽  
Yingying Zhao ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Indoor Environment ◽  
Natural Ventilation ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Environment Quality ◽  
Air Supply ◽  
Indoor Environment Quality ◽  
Jinan City ◽  
Ventilation Fan

Strengthening indoor ventilation is an important measure to improve air quality. In transitional season between spring and summer, a university classroom in Jinan city was selected as the research object. Mechanical air supply is adopted to solve the problem of insufficient fresh air or excessive carbon dioxide concentration in the classroom. CO2 concentration and air change rates are compared in natural ventilation and mechanical classrooms. The experiment shows that the indoor CO2 concentration of mechanical ventilation classroom is relatively low. Under natural ventilation, mechanical ventilation and mixed ventilation, the average air change rates were 1.05 h-1, 1.83 h-1 and 2.7 h-1, respectively. According to the statistics analysis of the questionnaire, 72.84% of the students hope to install the mechanical ventilation in the classroom.

Parameters contributing to occupants’ satisfaction

Facilities ◽  
2014 ◽  
Vol 32 (7/8) ◽  
pp. 411-437 ◽  
Author(s):  
Agnieszka Zalejska-Jonsson
Keyword(s):  
Indoor Environment ◽  
Residential Buildings ◽  
Logistic Models ◽  
Green Building ◽  
Content Type ◽  
Environment Quality ◽  
Physical Measurements ◽  
Significant Difference ◽  
Indoor Environment Quality ◽  
The Difference

Purpose – The aims of this paper is to investigate the overall satisfaction of occupants of green and conventional residential buildings and their perception of indoor environment quality (IEQ) and to study factors that may cause occupants’ dissatisfaction. Design/methodology/approach – Data were collected through a survey sent to occupants of comparable green and conventional multi-family buildings. The difference in responses between occupants of green and conventional buildings was analysed using Mann–Whitney (rank sum) test. The ordered logistic models were applied to the data to test whether the overall satisfaction changes depending on the level of acceptance of indoor environment quality and whether the building environmental profile and the apartment tenure affect occupant satisfaction. Findings – The results show that both categories of occupants are very satisfied with their apartments and that there is no statistically significant difference between the stated overall satisfaction of occupants living in green and conventional buildings, although a difference was found in the acceptance level for thermal and sound quality. The research highlights the importance of occupant feedback, user-friendly technical installations and the ability to control indoor environment. This knowledge is important for designers, engineers and developers alike in enabling them to improve dwelling quality and minimize post-occupancy problems. Research limitations/implications – It was not possible to include physical measurements of IEQ parameters; the analysis is based only on occupants’ responses, which may carry a certain subjectivity. Originality/value – The paper contributes to the understanding of IEQ from occupant perspective and to knowledge on green building performance.

scholarly journals On reducing CO2 concentration in buildings by using plants

2021 ◽  
Vol 61 (5) ◽  
pp. 617-623
Author(s):  
Ondřej Franek ◽  
Čeněk Jarský
Keyword(s):  
Indoor Environment ◽  
Co2 Concentration ◽  
Operating Costs ◽  
Internal Environment ◽  
Environment Quality ◽  
Office Space ◽  
Indoor Environment Quality ◽  
Building Ventilation ◽  
Different Levels

The article deals with the implementation of plants in the indoor environment of buildings to reduce the concentration of CO2. Based on a specified model representing the internal environment of an office space, it was studied whether the requirement for the total amount of ventilated air could be reduced by using plants, thereby achieving savings of operating costs in the building ventilation sector. The present research describes the effect of plant implementation according to different levels of CO2 concentration of the supply air, specifically with values of 410 ppm corresponding to the year 2020, 550 ppm to the year 2050 and 670 ppm to the year 2100, as well as according to different levels of CO2 concentration in the indoor environment, namely 1000 ppm and 1500 ppm, the illumination of plants in the indoor environment is constant in the model, PPFD equals to 200 μmolm−2 s−1. Based on the computational model, it was found that the implemented plants can positively influence the requirement for the total amount of ventilated air, the most significant effect is in the case of a low indoor environment quality, with the CO2 concentration of 1500 ppm, and a high supply air quality 410 p˙pm. The simulation also showed that compared to 2020, by the year 2100, it will be necessary to increase the ventilation of the indoor environment by 25.1% to ensure the same quality of the indoorenvironment.

A Report on The Acoustic Conditions of IEQ Laboratory Using ISO 3382-3

2018 ◽  
Vol 10 (1) ◽  
pp. 19-26
Author(s):  
Jason Obadiah
Keyword(s):  
Indoor Environment ◽  
Environment Quality ◽  
Indoor Environment Quality ◽  
The Future ◽  
Open Plan ◽  
Acoustic Conditions

Recently, many facilities have completed new laboratories that may be used to assess various measures of Indoor Environment Quality (IEQ) in office spaces. Also recently, a new standard, ISO 3382-3, was released for assessing the effects of speech on IEQ in open plan offices. The aim of this report is to assess one room of the IEQ lab using the ISO 3382-3 standard. It is expected that the data gained will be of help to researchers using the facility in the future. Keywords: ISO 3382-3, Indoor Environment Quality, Acoustics

scholarly journals Polycyclic Aromatic Hydrocarbons in Indoor Dust Collected during the COVID-19 Pandemic Lockdown in Saudi Arabia: Status, Sources and Human Health Risks

2021 ◽  
Vol 18 (5) ◽  
pp. 2743
Author(s):  
Sultan Hassan Alamri ◽  
Nadeem Ali ◽  
Hussain Mohammed Salem Ali Albar ◽  
Muhammad Imtiaz Rashid ◽  
Nisreen Rajeh ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Saudi Arabia ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Human Health ◽  
Aromatic Hydrocarbons ◽  
Indoor Environment ◽  
Indoor Dust ◽  
Environment Quality ◽  
Indoor Environment Quality ◽  
Polycyclic Aromatic

To control the spread of coronavirus disease (COVID-19), Saudi Arabia’s government imposed a strict lockdown during March–July 2020. As a result, the public was confined to indoors, and most of their daily activities were happening in their indoor places, which might have resulted in lower indoor environment quality. Polycyclic aromatic hydrocarbons (PAHs) were analyzed in household dust (n = 40) collected from different residential districts of Jeddah, Saudi Arabia, during the lockdown period. PAHs’ levels were two folds higher than the previously reported PAHs in indoor dust from this region. We detected low molecular weight (LMW) with two to four aromatic ring PAHs in all the samples with a significant contribution from Phenanthrene (Phe), present at an average concentration of 1590 ng/g of dust. Although high molecular weight (HMW) (5–6 aromatic ring) PAHs were detected at lower concentrations than LMW PAHs, however, they contributed >90% in the carcinogenic index of PAHs. The estimated daily intake (EDI) of specific PAHs was above the reference dose (RfD) for young children in high-end exposure and the calculated Incremental Lifetime Cancer Risk (ILCR) was >1.00 × 10−4 for both Saudi adults and young children. The study highlighted that indoor pollution has increased significantly during lockdown due to the increased indoor activities and inversely affect human health. This study also warrants to conduct more studies involving different chemicals to understand the indoor environment quality during strict lockdown conditions.

scholarly journals An Analysis of LEED and BREEAM Assessment Methods for Educational Institutions

2010 ◽  
Vol 5 (1) ◽  
pp. 132-154 ◽  
Author(s):  
Tracie J Reed ◽  
Peggi L Clouston ◽  
Simi Hoque ◽  
Paul R Fisette
Keyword(s):  
Indoor Environment ◽  
Green Building ◽  
The United States ◽  
Assessment Methods ◽  
The Other ◽  
Educational Institutions ◽  
Environment Quality ◽  
Indoor Environment Quality ◽  
K 12 ◽  
British Research

This study examines the differences between two environmental assessment methods for the K-12 education sector: the United States Green Building Council's (USGBC) LEED Schools Version 3.0 and the British Research Establishment's (BRE) BREEAM Education issue 2.0. Credit requirements are compared side-by-side and against recommendations from researchers in areas such as acoustics, lighting and indoor environment quality. Strengths in the two schemes and areas for improvement are highlighted, with acknowledgement that each scheme offers components and techniques from which the other could benefit.

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