scholarly journals A Wireless Gas Sensor Network to Monitor Indoor Environmental Quality in Schools

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4345 ◽  
Author(s):  
Alvaro Ortiz Perez ◽  
Benedikt Bierer ◽  
Louisa Scholz ◽  
Jürgen Wöllenstein ◽  
Stefan Palzer
Keyword(s):  
Sensor Network ◽  
Gas Sensor ◽  
Environmental Quality ◽  
Energy Savings ◽  
Environmental Parameters ◽  
Well Being ◽  
Sensor Nodes ◽  
Indoor Environmental Quality ◽  
Monitoring And Control ◽  
And Control

Schools are amongst the most densely occupied indoor areas and at the same time children and young adults are the most vulnerable group with respect to adverse health effects as a result of poor environmental conditions. Health, performance and well-being of pupils crucially depend on indoor environmental quality (IEQ) of which air quality and thermal comfort are central pillars. This makes the monitoring and control of environmental parameters in classes important. At the same time most school buildings do neither feature automated, intelligent heating, ventilation, and air conditioning (HVAC) systems nor suitable IEQ monitoring systems. In this contribution, we therefore investigate the capabilities of a novel wireless gas sensor network to determine carbon dioxide concentrations, along with temperature and humidity. The use of a photoacoustic detector enables the construction of long-term stable, miniaturized, LED-based non-dispersive infrared absorption spectrometers without the use of a reference channel. The data of the sensor nodes is transmitted via a Z-Wave protocol to a central gateway, which in turn sends the data to a web-based platform for online analysis. The results show that it is difficult to maintain adequate IEQ levels in class rooms even when ventilating frequently and that individual monitoring and control of rooms is necessary to combine energy savings and good IEQ.

Monitoring and Control System of Variable Frequency Aeration Based on PID Control

2013 ◽  
Vol 288 ◽  
pp. 167-171
Author(s):  
Juan Huan ◽  
Xing Qiao Liu ◽  
Hong Yuan Wang ◽  
Hong Yuan Wang
Keyword(s):  
Control System ◽  
Real Time ◽  
Energy Savings ◽  
Frequency Converter ◽  
Environmental Parameters ◽  
Variable Frequency ◽  
Monitoring And Control ◽  
Monitoring And Control System ◽  
Efficient Control ◽  
And Control

Efficient control of DO may increase energy savings, improve productivity, and enhance sustainability for aquaculture. A new monitoring and control system of variable frequency aeration based on PID has been designed. It can real-time monitor environmental parameters such as PH, DO, temperature, and the height of water. In addition, it can control DO in time. According to the actual changes of DO, the frequency converter automatically controls the aerator’s work. The experiment indicates that the relative error of sensor’s measuring DO is controlled in ±1.3%.The system works stably and achieved the function that it can collect environment data automatically, and manage data in real time.

THE IMPACT OF THE INDOOR ENVIRONMENTAL QUALITY ON STUDENTS’ PERFORMANCE

2021 ◽  
Author(s):  
Tania Rus ◽  
Dorin Beu ◽  
Calin Ciugudeanu
Keyword(s):  
Carbon Dioxide ◽  
Environmental Quality ◽  
Current Knowledge ◽  
Carbon Dioxide Concentration ◽  
Environmental Parameters ◽  
Field Measurements ◽  
Well Being ◽  
Indoor Environmental Quality ◽  
Key Factor ◽  
The Impact

"The indoor environment quality is a key factor in people's lives, which directly affects their comfort, performance, health and well-being. The main factors that contribute to the indoor environmental quality are thermal comfort, air and lighting quality and acoustics. This study aims to extend the current knowledge on the impact of IEQ on students’ performance. Field measurements on environmental factors were performed in two similar classrooms, with the same number of students engaged in a written examination. Compliance of the indoor environmental parameters with the current standards regulations was performed. Students’ performance was quantified by their exam grades. The results of the field measurements show that, in both classrooms, the acoustics and air quality do not fulfil the standard regulations, especially in the case of carbon dioxide concentration which exceeds a lot the threshold limit of 1000 ppm. The outcomes of the study also reveal that in the classroom where the concentration of carbon dioxide is higher, the students scored lower grades, therefore we can conclude that indoor environmental quality has an impact on students’ performance."

Indicators of wireless technologies for monitoring the quality and management

2017 ◽  
Vol 11 (1) ◽  
pp. 14-24
Author(s):  
Е. М. Abbasov
Keyword(s):  
Wireless Lan ◽  
Sensor Nodes ◽  
Wireless Internet ◽  
Monitoring And Control ◽  
Ieee 802.11N ◽  
Wireless Technologies ◽  
Zigbee Technology ◽  
Transmission Of Information ◽  
And Control ◽  
Transmission Speed

The problems of integration of the various wireless technologies, for-consists in the provision of required transmission speed and the transmission of information over a considerable distance at low power sensor nodes transmitters wireless Internet-water network for remote monitoring. Analyzed the integration of wireless LAN standard IEEE 802.11n/g and Bluetooth. Determined Graphic analytical dependence-dence, the defining characteristics of the data rate for wireless IEEE 802.11n / g networks. It analyzes the main shortcomings of BSS associated with ef cient use of batteries; the basic Metody reduce energy consumption for WSN based on the ZigBee technology, based on the planning schemes of awakening and data collection schemes. The possibilities MeshLogic technology solutions for the monitoring and control tasks that are critical to BPE-autonomous work Meni sensors.

A Design of Coal Mine Security Monitoring Substation Based on ZIGBEE and CAN Bus

2014 ◽  
Vol 971-973 ◽  
pp. 1033-1036
Author(s):  
Hui Jun Wang ◽  
Zhi Qun Yong
Keyword(s):  
Coal Mine ◽  
Can Bus ◽  
Measurement Data ◽  
Environmental Parameters ◽  
Monitoring And Control ◽  
Monitoring And Control System ◽  
Security Monitoring ◽  
Mine Development ◽  
Security Monitoring System ◽  
And Control

In view of the shortcoming such as wiring difficulties, poor scalability, and big cable usage in present mine security monitoring system, this paper puts forward a kind of substation monitoring and control system based on ZIGBEE and CAN. With the core of core, The system collects various measurement data of sensors through the ZIGBEE wireless network, realizes the to collect, and then through the CAN bus to realize the transmission of control commands and data of the up and down machine, and monitor the production parameters and environmental parameters in the coal mine. Experiments show that the monitoring substation is of high real-time performance, good stability, strong expansibility, etc., and can meet the requirements of the coal mine development and mining.

HIEQ LAB: A NOVEL FULL-SCALE FACILITY WITH OCCUPANTS TO INVESTIGATE INTEGRATIVE LIGHTING AND HUMAN PERFORMANCE IN A MULTI-DOMAIN APPROACH

2021 ◽  
Author(s):  
L. Giovannini ◽  
V.R.M. Lo Verso ◽  
F. Favoino ◽  
V. Serra ◽  
A. Pellegrino
Keyword(s):  
Human Performance ◽  
Well Being ◽  
Energy Performance ◽  
Real Space ◽  
Indoor Environmental Quality ◽  
Design Strategies ◽  
Main Research ◽  
Building Components ◽  
Lighting Systems ◽  
And Control

The new HIEQ Lab (Health, well-being and Indoor Environmental Quality Laboratory) is presented. It is a living lab, primarily intended for research on human performance, comfort, and well-being, integrated with the energy performance in a completely controlled real space. Users are involved as active players in controlling and assessing building components and design strategies for health, well-being and IEQ requirements. Experimental activities will be addressed through a multi-domain approach that combines lighting, acoustic, air quality and thermal issues. For what concerns lighting, the laboratory is conceived to study the performance of daylighting and electric lighting systems and control solutions, focusing on the relationship between lighting conditions and human performance, comfort, and well-being. The paper reports the results of a literature review on existing lighting research facilities, and then describes the features of the new HIEQ Lab and its main research objectives, with a focus on lighting and daylighting research opportunities.

Performance Improvement of Clustered WSN by Using Multi-Tier Clustering

2016 ◽  
pp. 541-564
Author(s):  
Yogesh Kumar Meena ◽  
Aditya Trivedi
Keyword(s):  
Sensor Network ◽  
Power Management ◽  
Energy Savings ◽  
Network Models ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Security Systems ◽  
Sensor Networking ◽  
Technical Issues ◽  
Clustering Approach

In the last few decades, the Wireless Sensor Network (WSN) paradigm has received huge interest from the industry and academia. Wireless sensor networking is used in various fields like weather monitoring, wildfire detection/monitoring, battlefield surveillance, security systems, military applications, etc. Moreover, various networking and technical issues still need to be addressed for successful deployment of WSN, especially power management. In this chapter, the various methods of saving energy in sensor nodes and a method by which energy can be saved are discussed with emphasis on various energy saving protocols and techniques, and the improvement in the Performance of Clustered WSN by using Multi-tier Clustering. By using a two-tier architecture in the clustering and operation of sensor nodes, an increase in the network lifetime of the WSN is gained. Since this clustering approach has better results in term of energy savings and organizing the network, the main objective of this chapter is to describe power management techniques, two-tier architecture, clustering approaches, and network models to save the energy of a sensor network.

Evaluation of occupants’ well-being and perception towards indoor environmental quality in Malaysia affordable housing

2019 ◽  
Vol 17 (1) ◽  
pp. 90-106 ◽  
Author(s):  
Syahrul Nizam Kamaruzzaman ◽  
Ainur Mardiha Azmal
Keyword(s):  
Environmental Quality ◽  
Affordable Housing ◽  
Questionnaire Survey ◽  
Sick Building Syndrome ◽  
Well Being ◽  
Health Condition ◽  
Indoor Environmental Quality ◽  
Content Type ◽  
Housing Area ◽  
Sick Building

Purpose This paper aims to identify the indoor environmental quality in an affordable housing, as well as the health condition of users. Furthermore, it aims to find the relationship between quality of the indoor environment (IEQ) and sick building syndrome (SBS) and the satisfaction level of the occupants towards the IEQ factor, as well as the importance of the factors in the occupants’ view. Additionally, the purpose of this pilot study is to validate the questionnaire and identify the possible outcome of this research for the main study. Design/methodology/approach There are a few methods to achieve the objective of this paper: first is by literature review and second is by a survey. There are two types of survey made: observation survey and questionnaire survey. The purpose of observation survey is to survey the surrounding and the condition of the apartments, while questionnaire survey was distributed to the respondents in the affordable housing area. Next, is analysis and discussion of the survey, and finally, summary. Findings Aside from achieving the validity of the questionnaire survey, the results of the survey have found that the respondents are dissatisfied with the noise and glare level, as well as the amount of artificial lighting in their unit. Additionally, they have rated health, ventilation and amount of air movement as the most important IEQ factors. More importantly, the occupants have experienced the symptoms of SBS and the health condition of the building occupants. The results show that the most frequent symptoms affected the respondents are fatigue, dizziness and a headache. Originality/value This paper has indicated the IEQ in the affordable housing and identifies the health risk of occupants, specifically in Malaysia.

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