A Review on Various Methodologies for AC Duct Cleaning

2020 ◽  
Vol 07 (3&4) ◽  
pp. 1-5
Author(s):  
Soyab A Jamadar ◽  
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Health Issues ◽  
Conventional System ◽  
Rectangular Shape ◽  
Inspection Robot ◽  
Different Types ◽  
Robot Systems ◽  
Articulated Robot

Cleaning of the AC ducts is the need because it creates problems such as the bad indoor air quality which results in health issues and it also causes the large maintenance of the system. The uncleaned air ducts become home for fungi, dust and harmful microbial. The causes and effects of this thing are mentioned following. The AC ducts can be cleaned through various methodologies i.e. conventional and by using robots. In the conventional system, there is manual cleaning by using some equipment. Cleaning the ducts by using robots would be a good solution for this. Different types of robot systems i.e. crawling robot, articulated robot and inspection robot are deployed for the application. There are different types of robots and their equipment according to size and type of duct. The cleaning of rectangular shape ducts is quite difficult than others. Finally, it results that cleaning ducts is the most important thing and using robots is the best methodology for it.

Improvement of indoor air quality in healthcare settings during COVID-19 pandemic (Preprint)

2020 ◽  
Author(s):  
Abderrahim Lakhouit ◽  
Hanaa Hachimi ◽  
Chakib El Mokhi ◽  
Adnane Addaim ◽  
Mohamed Kaicer
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Disease Outbreaks ◽  
Ventilation Mode ◽  
Healthcare Settings ◽  
Different Types ◽  
American Society ◽  
Quality In Healthcare ◽  
The Impact

UNSTRUCTURED This study investigates the importance of using engineering ventilation in healthcare settings, especially during widespread disease outbreaks such as COVID-19. Ventilation can be used to improve indoor air quality in care homes, hospitals, and quarantine locations. Although there are several different types of engineering ventilation, mechanical ventilation is most suitable for reducing the impact and spread of COVID-19 in healthcare and other facilities. However, this ventilation mode should be designed according to the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), with the minimum exhaust air flow measuring 5 liters per second per square meter.

scholarly journals Forensic Engineering Analysis Of Building Depressurization Induced Product Re-Entry

2012 ◽  
Vol 29 (1) ◽  
Author(s):  
John P. Certuse
Keyword(s):  
Air Quality ◽  
Side Effects ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Building Materials ◽  
Health Issues ◽  
Engineering Analysis ◽  
Boiler Furnace ◽  
Combustion Emissions ◽  
Forensic Engineering

With The Advances In Building Materials And Practices Through The Building Expansions Of The 1980 And 90, Along With The Inherent Benefits Of These Improvements, Some Unwanted Side Effects Have Resulted As Well. Indoor Air Quality (Iaq) Issues Ranging From Mold And Dust Accumulations Have Become Both A Nuisance As Well As, In Some Instances Health Issues To Many Homeowners Who Own Houses With These Inherent Problems. One Such Chronic Building Issue Is The Result Of The Failure To Recognize The House Heating (Or Combustion) Appliance As A Ystem This Problem Is Known As Epressurization Induced Combustion Re-Entry Depressurization Induced Combustion Re-Entry Is The Re-Introduction Of Combustion Emissions Back Into A Structure As A Result Of Negative Air Pressures Developed By The Structure As Well As The Location Of The Point Of Discharge Of The Emissions From The Combustion Appliance. Combustion Appliances Can Be Anything From A Boiler, Furnace Or Fireplace And This Problem Occurs Regardless Of The Type Of Combustion Fuel Being Consumed In The Structure. This Paper Will Address The Root Causes Of Depressurization Combustion Re-Entry Using Excerpts Of Cases Investigated And Assisted In Litigation The Paper Will Also Address House And System Modifications That Can Be Performed To Reduce Or Eliminate The Effects Of Depressurization Induced Combustion Re-Entry

scholarly journals Influence of Superabsorbent Polymers on Moisture Control in Building Interiors

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2009 ◽  
Author(s):  
Jan Fořt ◽  
Jan Kočí ◽  
Jaroslav Pokorný ◽  
Robert Černý
Keyword(s):  
Air Quality ◽  
Computational Modeling ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Health Issues ◽  
Potential Health ◽  
Superabsorbent Polymers ◽  
Water Absorption Coefficient ◽  
Current State ◽  
Moisture Buffering

Moisture loads in building interiors are accompanied by a deterioration of the indoor air quality. Such a phenomenon may induce serious health risks for building inhabitants as well as degradation of furnishing. Unfortunately, the employment of additional heat, ventilation and air conditioning (HVAC) devices does not comply with the sustainability principle due to increased energy consumption, thus cannot be viewed as an efficient solution. This study deals with the use of superabsorbent polymers (SAP) in cement-lime plasters, thus extends the current state of knowledge and outlines further possible development of novel moisture responsive plasters since lightweight aggregates do not provide the desired performance. To be specific, this paper contemplates the experimental analysis of novel plasters modified by 0.5, 1 and 1.5 wt. % of SAP to obtain input parameters for computational modeling. Based on the obtained outputs, the incorporation of SAP admixture resulted in a substantial increase in moisture transport properties including the water absorption coefficient and water vapor diffusion properties. The performed computational modeling revealed a considerable reduction of relative humidity fluctuations, thus mitigation of potential health issues associated with undesired moisture content in building interiors. Achieved results indicate that the SAP enhanced plasters have substantial passive moisture buffering performance and thus may contribute to the improvement of indoor air quality.

Indoor Air Quality of Fired Clay Brick Incorporated with Mosaic Sludge

2016 ◽  
Vol 857 ◽  
pp. 342-346
Author(s):  
Aeslina Abdul Kadir ◽  
Nurul Salhana Abdul Salim ◽  
Ahmad Shayuti Abdul Rahim ◽  
Norazian Mohamed Noor
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Low Cost ◽  
Global Environment ◽  
Clay Brick ◽  
Standard Requirement ◽  
Different Types ◽  
Sludge Waste

Disposal of industrial mosaic sludge waste into landfills has become serious threat to the global environment due to the huge generation of waste every year. Nevertheless, a relevant alternative solution could be develop as recently rapid growing interest are focusing on the usage of wastes material into the manufacturing of fired clay. Furthermore, previous research has successfully incorporated different types of sludge into the fired clay brick. Therefore, this study is focusing on the potential of incorporating two types of mosaic sludge in terms of properties and indoor air quality (IAQ) performance. Different percentages (0%, 5%, 10%, 20%, 30%) of mosaic sludge waste were incorporated into fired clay brick. In terms of strength, 30% of sludge waste show higher strength of brick. In terms of IAQ, all the results of both sludge waste were compiled with the standard requirement. From this study, it shows that mosaic sludge that incorporated with fired clay brick is safe to be used towards the environment since it is complied with ICOP-IAQ. In addition, this study may help to create an alternative method to dispose the sludge waste as well as to provide another low cost material for the clay brick.

scholarly journals Impact of Air Purifiers on Indoor Air Quality in a Classroom of DTU

2020 ◽  
Vol 9 (1) ◽  
pp. 563-571
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Sound Level ◽  
Maintenance Cost ◽  
Sources Of Pollution ◽  
Different Types ◽  
Air Purifier ◽  
The Right ◽  
Concentration Levels

In Delhi, the most polluted city in India, the outdoor air pollution is severely high and due to this indoor air quality has also got worse which is more significant especially in winters. One of the available solutions to tackle the poor indoor air quality is an Air Purifier, which is a device that removes contaminants from the air in a room to improve indoor air quality. But with so many kinds available, the need to choose the right air purifier is crucial in a polluted location like Delhi. This study puts an emphasis on the efficiency of some of the readily available Air Purifiers in India and compares them on the basis of their PM1 and PM2.5 particle reduction ability, and noise generated under similar conditions. In this study, different types of air purifiers were used, and the efficiency of each examined air purifier was calculated so that it could be concluded which air purifier is best for use in cities like Delhi. The concentration levels of the primary sources of pollution i.e. PM1 and PM2.5 were recorded in the absence of any air purifier. This process was again repeated for the same duration of time, but in the presence of different types of air purifiers in a classroom in DTU using an EPAM-5000. The noise generated by each purifier was recorded using a Sound Level Meter. The introduction of an air purifier in the study area resulted in the decline of concentration levels of PM1 and PM 2.5 gradually. However, the limitations of each of the purifiers are discussed in brief and the possible steps to overcome them are provided. The air purifiers used these days do not remove pollutants completely, due to which bacteria and viruses start to form their colonies on the filter which reduces the lifespan of the filter. It increases the maintenance cost of the product which makes it unaffordable. Therefore, the monopoly of filters should be changed to the new filter-less technology. One of the possible solutions is also provided which works on the principle of ‘Trap and Kill’ technology that is more effective in eliminating the Pollutants, Bacteria and viruses from indoor air.

scholarly journals Indoor Air Quality Improvement Using Nature-Based Solutions: Design Proposals to Greener Cities

2021 ◽  
Vol 18 (16) ◽  
pp. 8472
Author(s):  
Teresa M. Mata ◽  
Gisela M. Oliveira ◽  
Helena Monteiro ◽  
Gabriela Ventura Silva ◽  
Nídia S. Caetano ◽  
...  
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Economic Losses ◽  
Indoor Environments ◽  
Health Issues ◽  
Advantages And Disadvantages ◽  
Current State ◽  
Air Quality Improvement ◽  
State Of Affairs

Low indoor air quality is an increasingly important problem due to the spread of urbanization. Because people spend most of their time inside, poor indoor air quality causes serious human health issues, resulting in significant economic losses. In this work, the current state of affairs is presented and analyzed, focusing on the current problems and the available solutions to improve the quality of indoor air, and the use of nature-based solutions. These involve the cultivation of microalgae in closed photobioreactors. In these systems, photosynthetic organisms can capture CO2 and other pollutants generated in indoor environments, which they use to grow and develop biomass. Several possible layouts for the implementation of microalgae-based indoor air cleaning systems are presented, taking into account the systems that are currently available at a commercial scale. A critical analysis of the microalgae indoor purification systems is presented, highlighting their advantages and disadvantages, and suggesting potential improvements and future lines of research and development in the area.

scholarly journals Indoor Air Quality in Buildings: A Comprehensive Review on the Factors Influencing Air Pollution in Residential and Commercial Structure

2021 ◽  
Vol 18 (6) ◽  
pp. 3276
Author(s):  
Mehzabeen Mannan ◽  
Sami G. Al-Ghamdi
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Comprehensive Evaluation ◽  
Indoor Environments ◽  
Sustainable Building ◽  
Different Types ◽  
Contaminant Sources ◽  
Materials Used ◽  
The Relationship

Worldwide people tend to spend approximately 90% of their time in different indoor environments. Along with the penetration of outside air pollutants, contaminants are produced in indoor environments due to different activities such as heating, cooling, cooking, and emissions from building products and the materials used. As people spend most of their lives in indoor environments, this has a significant influence on human health and productivity. Despite the two decades of indoor air quality (IAQ) research from different perspectives, there is still a lack of comprehensive evaluation of peer-reviewed IAQ studies that specifically covers the relationship between the internal characteristics of different types of building environments with IAQ to help understand the progress and limitations of IAQ research worldwide. Therefore, this review of scientific studies presents a broad spectrum of pollutants identified in both residential and commercial indoor environments, highlighting the trends and gaps in IAQ research. Moreover, analysis of literature data enabled us to assess the different IAQs in buildings located in different countries/regions, thus reflecting the current global scientific understanding of IAQ. This review has the potential to benefit building professionals by establishing indoor air regulations that account for all indoor contaminant sources to create healthy and sustainable building environments.

Feinstaubfiltrierung: Saubere Luft atmen

2017 ◽  
Vol 22 (07/08) ◽  
pp. 106-107
Author(s):  
Marc Lichtenthäler
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Eine Hohe

Viele Studien belegen, dass durch eine hohe Indoor Air Quality die Produktivität gesteigert, Fehlzeiten abgebaut und Herz-Kreislauf-Erkrankungen vermieden werden können. Neben Behandlungs-, OP- und Pflegebereichen eines Klinikums sollten deshalb auch Bereiche mit gut aufbereiteter Raumluft bedacht werden, in denen sich ausschließlich Mitarbeiter aufhalten.

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