Comparative Analysis on Built Environment between Ground and Underground Shopping Malls in Chongqing in P.R. China

2014 ◽  
Vol 1065-1069 ◽  
pp. 1656-1660
Author(s):  
Wen Jie Li ◽  
Xin Xue Liao ◽  
Zhe Meng ◽  
Gao Yang Miao
Keyword(s):  
Air Quality ◽  
Built Environment ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Thermal Environment ◽  
Environmental Parameters ◽  
National Standard ◽  
Shopping Malls ◽  
Acoustic Environment ◽  
Improvement Measures

An investigation study on built environment was carried out for ground shopping malls and underground shopping malls, in search of similarities and differences between them. Four representative shopping malls were investigated from 2012 to 2014 by means of testing and questionnaires. It analyzed the current situation of indoor thermal environment, light environment, acoustic environment as well as indoor air quality. The study found that no significant differences in indoor environmental parameters (including air temperature, relative humidity and air velocity) and people’s sensation vote to them, apart from draft sensation vote for the two types of shopping malls. Besides, both the average indoor illumination was far below the national standard especially for underground shopping malls. Moreover, Noise levels were basically the same and the satisfaction rate of acoustic environment of underground shopping malls was apparently inferior to that of ground shopping malls. Eventually, indoor air quality was not as undesirable as it was expected even measured in the two types. On the basis of studying, some practicable improvement measures were proposed.

scholarly journals Indoor air quality improvement and purification by atmospheric pressure Non-Thermal Plasma (NTP)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Prince Junior Asilevi ◽  
Patrick Boakye ◽  
Sampson Oduro-Kwarteng ◽  
Bernard Fei-Baffoe ◽  
Yen Adams Sokama-Neuyam
Keyword(s):  
Air Quality ◽  
Built Environment ◽  
Indoor Air Quality ◽  
Removal Efficiency ◽  
Indoor Air ◽  
Thermal Plasma ◽  
Processing Parameters ◽  
Optimum Conditions ◽  
Non Thermal Plasma ◽  
The Impact

AbstractNon-thermal plasma (NTP) is a promising technology for the improvement of indoor air quality (IAQ) by removing volatile organic compounds (VOCs) through advanced oxidation process (AOP). In this paper, authors developed a laboratory scale dielectric barrier discharge (DBD) reactor which generates atmospheric NTP to study the removal of low-concentration formaldehyde (HCHO), a typical indoor air VOC in the built environment associated with cancer and leukemia, under different processing conditions. Strong ionization NTP was generated between the DBD electrodes by a pulse power zero-voltage switching flyback transformer (ZVS-FBT), which caused ionization of air molecules leading to active species formation to convert HCHO into carbon dioxide (CO2) and water vapor (H2O). The impact of key electrical and physical processing parameters i.e. discharge power (P), initial concentration (Cin), flow rate (F), and relative humidity (RH) which affect the formaldehyde removal efficiency (ɳ) were studied to determine optimum conditions. Results show that, the correlation coefficient (R2) of removal efficiency dependence on the processing parameters follow the order R2 (F) = 0.99 > R2 (RH) = 0.96, > R2 (Cin) = 0.94 > R2 (P) = 0.93. The removal efficiency reached 99% under the optimum conditions of P = 0.6 W, Cin = 0.1 ppm, F = 0.2 m3/h, and RH = 65% with no secondary pollution. The study provided a theoretical and experimental basis for the application of DBD plasma for air purification in the built environment.

scholarly journals Expression of concern

2018 ◽  
Vol 28 (2) ◽  
pp. 289-289
Keyword(s):  
Public Health ◽  
Air Quality ◽  
Intellectual Property ◽  
Built Environment ◽  
Indoor Air Quality ◽  
Intellectual Property Rights ◽  
Indoor Air ◽  
Journal Editor ◽  
Publication Ethics ◽  
High Standards

The Journal Editor and the Publisher hereby issues an expression of concern for the following article: Abdel-Salam MM. Investigation of indoor air quality at urban schools in Qatar. Indoor Built Environ. 2019; 28: 278–288 . The ownership of the data upon which this paper is based is disputed between the author and the Qatari Ministry of Public Health. The Journal Editor and the Publisher are not in a position to determine the intellectual property rights of this case. The Journal Editor and the Publisher strive to uphold the very highest standards of publication ethics and are committed to supporting the high standards of integrity of Indoor and Built Environment.

Indoor Air Quality in a Cardiac Care Unit (CCU) under Different Ventilations

2021 ◽  
Vol 21 (1) ◽  
pp. 1-7
Author(s):  
Abdulhadi Salman ◽  
Ali A. Monem ◽  
Emad A. Khazal
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Indoor Environment ◽  
Thermal Environment ◽  
Numerical Study ◽  
Cardiac Care ◽  
Displacement Ventilation ◽  
Set Up ◽  
Cardiac Care Unit

A proper ventilation offered warranty for a perfect indoor environment. Indoor air environment includes indoor thermal environment and indoor air quality (IAQ). In this paper a numerical investigation of the indoor environment in different ventilations was accomplished. The Cardiac Care Unit (CCU) in Al-Rifai hospital in Thi-Qar governorate was chosen to be investigated, and its thermal achievement and indoor air quality in the hot summer weather were simulated. For the numerical study, the fluent technique used to set up the physical and numerical model of CCU. An attention has been paid carefully to considerate the distributions of the temperature and the velocity fields, followed by an argument of two different ventilation patterns; up-in and up-out ventilation (UV) and displacement ventilation (DV). After making the comparison, it was noticed that the displacement ventilation (DV) is clearly super than that of the up-in and up-out ventilation (UV) due to improvement in the indoor air quality.

scholarly journals Evaluation of the Indoor Air Quality in Governmental Oversight Supermarkets (Co-Ops) in Kuwait

2019 ◽  
Vol 9 (22) ◽  
pp. 4950
Author(s):  
Almutairi ◽  
Alsanad ◽  
Alhelailah
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Quality Index ◽  
Sick Building Syndrome ◽  
Environmental Parameters ◽  
Limit Set ◽  
Sick Building ◽  
Environmental Agencies

Examining the indoor air environment of public venues, especially populated supermarkets such as Co-Ops in Kuwait, is crucial to ensure that these venues are safe from indoor environmental deficits such as sick building syndrome (SBS). The aim of this study was to characterize the quality of the indoor air environment of the Co-Ops supermarkets in Kuwait based on investigation of CO2, CO, NO2, H2S, TVOCs, and NMHC. On-site measurements were conducted to evaluate these parameters in three locations at the selected Co-Ops, and the perceived air quality (PAQ) was determined to quantify the air’s pollutants as perceived by humans. Moreover, the indoor air quality index (AQI) was constructed for the selected locations, and the ANOVA test was used to analyze the association between the observed concentrations among these environmental parameters. At least in one spot at each Co-Op, the tested environmental parameters exceeded the threshold limit set by the environmental agencies. The PAQ for Co-Op1, 2, and 3 are 1.25, 1.00, and 0.75 respectively. CO2 was significantly found in an association with CO, H2S, and TVOCs, and its indoor-outdoor concentrations were significantly correlated with R2 values ranges from 0.40 to 0.86 depending on the tested location.

The Effects of Opening Windows Behavior on Indoor Air Quality of a Newly Decorated Office Building

2012 ◽  
Vol 517 ◽  
pp. 892-896 ◽  
Author(s):  
Xiao Hang Shen ◽  
Nian Ping Li ◽  
Xiao Jia Fan ◽  
Yan Lin Wu ◽  
Yu Zeng Ke
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Natural Ventilation ◽  
Field Testing ◽  
National Standard ◽  
Commercial Building ◽  
Long Time ◽  
Questionnaire Surveys

In the newly decorated office premises, the architectural decoration material will release much polluted gas, thus the IAQ is highly concerned. Natural ventilation through open windows can influence the IAQ. To study the effects of opening windows on the indoor air quality of newly decorated office premises, we choose several newly decorated offices in a commercial building in Changsha, a city in hot summer and cold winter region of China, as the study object. The 4 contrastive research schemes in the winter are adopted to acquire the results. Field-testing and air sampling methods were taken respectively to the 4 schemes to measure the concentrations of the main pollution composition such as formaldehyde, ammonia, benzene and TVOC in the offices. Meanwhile, relevant questionnaire surveys towards the four schemes were taken to the staff in the offices. We have synthesized and analyzed the IAQ condition of the 4 research schemes from the results of the tests and surveys. The result of the study shows that: the IAQ is the worst and cannot come up to the national standard when closing windows all day long in the newly decorated offices. Also some staff have a series of adverse reactions working in the work environment for a long time. All the other three schemes can improve the IAQ differently, and the scheme that opening windows all day long can improve the IAQ the best. Meanwhile, people can feel the change of IAQ effected by the 3 ventilation schemes if he/she is working for a long time in the offices.

Numerical and Experimental Analysis on Indoor Thermal Environment in Commercial Kitchen

2012 ◽  
Vol 518-523 ◽  
pp. 4435-4438
Author(s):  
Da Hua Jiang ◽  
Zhi Hua Wang ◽  
Fa En Shi ◽  
Ru Shan Ren
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Thermal Environment ◽  
Co2 Concentration ◽  
Maximum Value ◽  
Work Area ◽  
Indoor Contaminants ◽  
The Impact

It is of great importance to study the impact of the cooking generated contaminants on the indoor air quality in the kitchen since cooking is regarded as the main source of indoor contaminants. This study aims investigate and analysis the indoor air quality of kitchen with using CFD numerical analysis method via the velocity, temperature, humidity CO2 concentration .It is concluded that The temperature distribution are large difference in the kitchen and the maximum value is up to 324K on the work area which near the cooking ,and the CO2 concentration which is close to the stove is 1420ppm,1370ppm, 1470ppm respectively, and it is more than the acceptance criteria (CO2<1000ppm) 42%,37% and 47% respectively. It is serious impact on the staff's physical health.

A sustainable localised air distribution system for enhancing thermal environment and indoor air quality of poultry house for semiarid region

2021 ◽  
Vol 203 ◽  
pp. 70-92
Author(s):  
Douaa K. Al Assaad ◽  
Mohamad S. Orabi ◽  
Nesreen K. Ghaddar ◽  
Kamel F. Ghali ◽  
Darine A. Salam ◽  
...  
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Distribution System ◽  
Thermal Environment ◽  
Air Distribution ◽  
Semiarid Region ◽  
Poultry House

scholarly journals Energy Performance, Indoor Air Quality and Comfort in New Nearly Zero Energy Day-care Centres in Northern Climatic Conditions

2019 ◽  
Vol 24 (1) ◽  
pp. 7-16 ◽  
Author(s):  
Kalle Kuusk ◽  
Ahmed Kaiser ◽  
Nicola Lolli ◽  
Jan Johansson ◽  
Tero Hasu ◽  
...  
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Day Care ◽  
Energy Use ◽  
Thermal Environment ◽  
Energy Performance ◽  
Indoor Climate ◽  
Zero Energy ◽  
Day Care Centres

The European energy policy pushes the member states to transform building stock into nearly Zero-Energy Buildings (nZEB). This paper is focused on data collected from existing nZEB day-care centres,in order to be able to assess possible differences between predicted and actual energy and indoorenvironmental performance. Building structures, service systems and the indoor climate and energyperformance of five day-care centres were investigated in Estonia, Finland and Norway.Indoor climate condition measurements showed that in general, the thermal environment and indoor airquality corresponded to the highest indoor climate categories I and II (EN 15251). Building heating andventilation systems in studied buildings are working without major problems. Good indoor climate conditions were also reflected in the occupant satisfaction questionnaires. For most of the studied buildings, over 80%of the people marked all indoor environment condition parameters (thermal comfort, indoor air quality,acoustics, odour and illuminance) acceptable. The thermal environment in the cooling season was reportedproblematic because it was lower than the minimum temperature for indoor climate category II.Energy consumption analysis showed that measured real energy use was higher, or even significantlyhigher, than the energy use calculated during the design phase. Potential causes of the higher actualenergy consumption are caused by differences of measured and designed solutions, methodology of theenergy calculations, and the differences in user behaviour.Lessons learnt from previously constructed day-care centres can be utilised in the planning and designof new nZEBs.

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