scholarly journals Indoor Environmental Quality Evaluation of Lecture Classrooms in an Institutional Building in a Cold Climate

2019 ◽  
Vol 11 (23) ◽  
pp. 6591 ◽  
Author(s):  
Lexuan Zhong ◽  
Jing Yuan ◽  
Brian Fleck
Keyword(s):  
Environmental Quality ◽  
Co2 Concentration ◽  
Sound Level ◽  
Cold Climate ◽  
Indoor Environmental Quality ◽  
Ann Model ◽  
University Of Alberta ◽  
Artificial Neural Network Ann ◽  
Carbon Dioxide Co2 ◽  
The University

In this paper, ventilation, indoor air quality (IAQ), thermal and acoustic conditions, and lighting were studied to evaluate the indoor environmental quality (IEQ) in an institutional building at the University of Alberta in Edmonton, Canada. This study examined IEQ parameters, including pressure, illuminance, acoustics, carbon dioxide (CO2) concentration, temperature, and humidity, with appropriate monitors allocated during a lecture (duration 50 min or 80 min) in four lecture classrooms repeatedly (N = 99) from October 2018 to March 2019 with the objectives of providing a comprehensive analysis of interactions between IEQ parameters. The classroom environments were maintained at 23 ± 1 °C and 33% ± 3% RH during two-season measurements. Indoor mean CO2 concentrations were 550–1055 ppm, and a mean sound level of 58 ± 3 dBA was observed. The air change rates were configured at 1.3–6.5 per hour based on continuous CO2 measurements and occupant loads in the lectures. A variance analysis indicated that the within-lecture classroom variations in most IEQ parameters exceeded between-lecture classrooms. A multilayer artificial neural network (ANN) model was developed on the basis of feedforward networks with a backpropagation algorithm. ANN results demonstrated the importance of the sequence of covariates on indoor conditions (temperature, RH, and CO2 level): Air change rate (ACR) > room operations (occupant number and light system) > outdoor conditions.

scholarly journals The Framework Model for the Implementation of Collaborative and Interactive Learning in the University Classroom

2019 ◽  
Vol 7 (5) ◽  
Author(s):  
Mohammed Alhaji Mohammed ◽  
Adel A. Abdou
Keyword(s):  
Instructional Technology ◽  
Student Performance ◽  
Environmental Quality ◽  
Interactive Learning ◽  
Indoor Environmental Quality ◽  
Student Learning Outcome ◽  
Framework Model ◽  
Set Up ◽  
The University ◽  
The Impact

Today, colleges and universities recognize that, to employ and retain good students and highest level of academic  staffing for the best student comprehension, the provision of contemporary and highly equipped instructional facilities is essential. This paper discusses the impact of the indoor environmental quality; the instructional technology; the physical set up of the university classroom; and the emerging teaching/learning pedagogies on students' performance. It is established that, these four factors have a significant effects on student learning outcome. The study also presents a comprehensive and critical review of literature on the nature of the university classroom for collaboraive and interactive learning, with the aim of providing an enabling environment of higher learning in the universities. The research suggests that improving the three influential components i.e. the indoor environmental quality, the instructional technology and the physical set up will help in enhancing student performance and productivity. The study concluded by establishing a systematic framework model for the implementation of the collaboraive and interactive learning in the university classroom.

scholarly journals Investigation of a Ventilation System for Energy Efficiency and Indoor Environmental Quality in a Renovated Historical Building: A Case Study

2019 ◽  
Vol 16 (21) ◽  
pp. 4133 ◽  
Author(s):  
Richard Nagy ◽  
Ľudmila Mečiarová ◽  
Silvia Vilčeková ◽  
Eva Krídlová Burdová ◽  
Danica Košičanová
Keyword(s):  
Energy Consumption ◽  
Relative Humidity ◽  
Environmental Quality ◽  
Natural Ventilation ◽  
Ventilation System ◽  
Sick Building Syndrome ◽  
Co2 Concentration ◽  
Indoor Environmental Quality ◽  
Historical Building ◽  
The Mean

This paper emphasizes the importance of environmental protection regarding the reduction of energy consumption while maintaining living standards. The aim of the research is to observe the effects of mechanical and natural ventilation on energy consumption and building operation as well as indoor environmental quality (IEQ). The results of indoor environmental quality testing show that the mean relative humidity (31%) is in the permissible range (30%–70%); the mean CO2 concentration (1050.5 ppm) is above the recommended value of 1000 ppm according to Pettenkofer; and the mean PM10 concentration (43.5 µg/m3) is under the limit value of 50 µg/m3. A very large positive correlation is found between relative humidity and concentration of CO2 as well as between the concentration of PM5 and the concentration of CO2. The most commonly occurring sick building syndrome (SBS) symptoms are found to be fatigue and the feeling of a heavy head.

Simulating the Use of CO2 Concentration Inputs for Controlling Temperature in a Hydronic Radiant System

2017 ◽  
Author(s):  
Michael Sterman ◽  
Melody Baglione
Keyword(s):  
High Performance ◽  
Energy Use ◽  
Numerical Models ◽  
Co2 Concentration ◽  
Ann Model ◽  
Heating And Cooling ◽  
Air Temperatures ◽  
Demand Fluctuations ◽  
Carbon Dioxide Co2 ◽  
And Control

Incorporating predictive control into heating, ventilation and air conditioning (HVAC) systems has the potential to improve occupancy comfort and reduce energy use. This paper simulates the novel use of carbon dioxide (CO2) concentration inputs to augment temperature prediction and control. An artificial neural network (ANN) model and a least mean squares (LMS) filtering algorithm are used to simulate the temperature and control of a classroom in a high performance academic building with hydronic radiant heating and cooling panels. Numerical models are populated with variables that affect the heat energy entering, leaving, and being generated in a classroom. These variables include indoor and outdoor air temperature, radiant water and supply air temperatures, and classroom CO2 concentrations. The models are compared and then used to simulate the effect of a new control system that inputs CO2 measurements to account for the heat being generated by occupants of the controlled space. Simulation results suggest that augmenting HVAC control systems with CO2 measurements has the potential to improve temperature regulation by anticipating heating and cooling demand fluctuations in spaces with abrupt changes in occupancy.

scholarly journals Indoor environmental quality in non-residential buildings - experimental investigation

2016 ◽  
Vol 20 (suppl. 5) ◽  
pp. 1521-1529
Author(s):  
Tamara Bajc ◽  
Maja Todorovic ◽  
Agis Papadopoulos
Keyword(s):  
Environmental Quality ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Co2 Concentration ◽  
Process Equipment ◽  
Indoor Environmental Quality ◽  
North East ◽  
The North ◽  
Ashrae Standards ◽  
The Impact

This paper presents the part of the research that has been done at the Universities both in Belgrade and Thessaloniki, Greece, taking into account indoor environmental quality in office buildings and classrooms. The measurements that are presented were done in Process Equipment Design Laboratory at Aristotle University Thessaloniki, during March 2015. Indoor environmental quality regarding air temperature, relative humidity, and CO2 concentration in two representative offices is observed. The similar offices are located one on the north-east and the other one on the south-west side of the University building, so as to be representative of the orientation?s impact. Furthermore, the impact of natural ventilation on CO2 concentration and temperature is monitored, together with the offices? occupancy. Recommended parameters for indoor air quality are compared and discussed on the base of several standards: SRPS EN 15251:2010, ASHRAE standards 55 and 62.1, and ISO 7730. The main objectives, as set from these standards are discussed, together with the investigation results.

scholarly journals 50 Below Zero by R. Munsch

2015 ◽  
Vol 4 (3) ◽  
Author(s):  
Sandy Campbell
Keyword(s):  
Public Libraries ◽  
School Libraries ◽  
Yukon Territory ◽  
Cold Climate ◽  
Intended Audience ◽  
Warm Up ◽  
University Of Alberta ◽  
Book Format ◽  
The University

Munsch, Robert.  50 Below Zero.  Illus. Michael Martchenko.  Richmond Hill, ON:  Annick Press, 2013. Print.Originally published in a larger format in 1986, 50 Below Zero has been republished as a board book.  The story is a northern and cold climate one, created while Munsch was making a book tour stop in Watson Lake in the Yukon Territory.  However, while the setting is cold, the story is really about sleepwalking.The text of the board book is much abbreviated from the original.  Much of the repetition, for example Jason’s “What’s that? What’s that? What’s that?” and the father’s running three times around something whenever he is wakened have been removed, as well as a segment where Jason finds his father in the bathtub.    However, the story still contains enough repetition to amuse the intended audience of 2 to 5 year-olds. Like many of Munsch’s books, the story presents a child who takes control of a problem and solves it.  Jason repeatedly gets up to find his father in a new location to which he has sleep walked.  Most importantly, he locates him out in the forest when it is “50 Below Zero”, asleep against a tree.  Had Jason not found him and brought him back to warm up in the bathtub, he surely would have died.   So Jason saves the day and even figures out how to keep his father out of danger while sleepwalking.Most of Michael Martchenko’s illustrations are in an icy blue, reflecting the cold winter landscape.  All of the images are fun and will elicit a smile from both child and adult readers.This book has stood the test of time and does well in the board book format.  It would be a good addition to school libraries, public libraries and libraries with polar children’s collections.Highly Recommended:  4 stars out of 4Reviewer:  Sandy CampbellSandy is a Health Sciences Librarian at the University of Alberta, who has written hundreds of book reviews across many disciplines.  Sandy thinks that sharing books with children is one of the greatest gifts anyone can give. 

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