Relevant bibliographies by topics / Forced air purification system

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  2. Dissertations / Theses
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Academic literature on the topic 'Forced air purification system'

Author: Grafiati
Published: 28 May 2022
Last updated: 29 May 2022

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Journal articles on the topic "Forced air purification system"

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Yoda, Yoshiko, Kenji Tamura, Sho Adachi, Naruhito Otani, Shoji F. Nakayama, and Masayuki Shima. "Effects of the Use of Air Purifier on Indoor Environment and Respiratory System among Healthy Adults." International Journal of Environmental Research and Public Health 17, no. 10 (2020): 3687. http://dx.doi.org/10.3390/ijerph17103687.

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Air purifiers have become popular among ordinary families. However, it remains controversial whether indoor air purification improves the respiratory health of healthy adults. A randomized crossover intervention study was conducted with 32 healthy individuals. The subjects were categorized into two groups. One group continuously used true air purifiers, and the other followed with sham air purifiers for 4 weeks. Following this first intervention, all the subjects underwent a 4-week washout period and continued with the second 4-week intervention with the alternate air purifiers. We collected fine particulate matter (PM) ≤ 2.5 µm in aerodynamic diameter (PM2.5), coarse particulate matter between 2.5 and 10 µm in aerodynamic diameter (PM10–2.5) and ozone (O3). The subjects’ pulmonary function and fractional exhaled nitric oxide (FeNO) were measured during the study period. The indoor PM2.5 concentrations decreased by 11% with the true air purifiers compared to those with sham air purifiers. However, this decrease was not significant (p = 0.08). The air purification did not significantly improve the pulmonary function of the study subjects. In contrast, an increase in the indoor PM10–2.5 and O3 concentration led to a significant decrease in the forced expiratory volume in one second (FEV1.0)/forced vital capacity (FVC) and maximal mid-expiratory flow (MMEF), respectively. In conclusion, air purification slightly improved the indoor PM2.5 concentrations in ordinary homes but had no demonstrable impact on improving health.
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Gevod, V. S., and I. A. Borisov. "Influence of air bubble flow structure on the rate of water purification by the bubble-film extraction method." Water Supply 19, no. 8 (2019): 2298–308. http://dx.doi.org/10.2166/ws.2019.112.

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Abstract Bubble-film extraction (upgraded bubble flotation) is one of the modern methods for purifying contaminated water from surface-active impurities. The features of this method have been considered from the standpoints of the equilibrium and dynamics of surfactant accumulation on floated air bubbles with different sizes. Within a certain ratio of dimension and quantity of air bubbles in their stream transferring adsorbed surfactants from the water bulk into the bubble-film extractor, the productivity of the process increases many times. The effect is ensured by a collective fusion of big and small air bubbles in their close-packed state (embedded system) inside the bubble-film extractor. The driving forces are impulses of capillary waves initiated at the bursting of big air bubbles as constituent ‘destructive’ units of that system.
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Raos, Miomir, Ljiljana Zivkovic, Amelija Djordjevic, and Branislav Todorovic. "Modelling of the filter-adsorber type air cleaner by using neural network." Facta universitatis - series: Physics, Chemistry and Technology 7, no. 1 (2009): 23–31. http://dx.doi.org/10.2298/fupct0901023r.

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It is well known that most air purifying methods imply the passing of air flow, as a pollutant carrier, through a control unit which retains impurities. Properties of the air control unit and the purifying process itself therefore differ depending on the nature of present impurities, as well as on flow-thermal properties of air as the carrier of those impurities. For the assumed conditions, in terms of production of a pollution source and presence of different polluting substances in the form of dust, aerosols, gas, vapor in the exhaust gas, etc., an integrated gas purifier has been designed and tested, comprising a module for purification of mechanical impurities and a module for purification of gaseous impurities. The purifier is compact and has a universal application while simultaneously retaining several different pollutants. These requirements were met through application of the filtration and adsorption methods. On the formed experimental line with an adequate system of acquisition, filter-adsorber type gas cleaners in the function of flow-thermal parameters of gas mixture were tested simultaneously. Experimental data were used for training the radial basis function neural network, which was then used to model properties of the process and gas cleaner.
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Okorokova, Nadezhda, Aleksandr Perchenok, Stanislav Sevruk, Elena Suvorova, Ariadna Farmakovskaya, and Kyaw Thu. "Application of mechanical filters for purification of electrolyte from solid products of the air and aluminum chemical cell reaction." Journal of Applied Engineering Science 18, no. 4 (2020): 713–18. http://dx.doi.org/10.5937/jaes0-28158.

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This work presents the results of the development and application of a filtration unit - a cartridge filter with a throttle (discharge) hole - for separating the solid phase - crystalline aluminum hydroxide Al(OH)3, formed during long-term operation of an air and aluminum chemical cell with alkaline electrolyte and power plants based on them. The main theoretical provisions on the filtration mechanism using the discharge hole are formulated, according to which the filtration process consists of two types of filtration - blowout piping and particle coupling. The developed method made it possible to: purify electrolyte with low friction to electrolyte flow at high concentrations of the solid phase; ensure long-term performance of the purification system with large masses of the solid phase formed; be able to quickly regenerate the electrolyte; have a small mass and volume; leave a sufficient amount of solid phase in the electrolyte so that the crystals of aluminum hydroxide passing through the filter are a seed for the crystallization of dissolved aluminum in the circuit. The studies carried out allowed us to conclude that the use of mechanical cartridge filters with an orifice hole is an effective and reliable method for cleaning the electrolyte of a power plant with an air and aluminum chemical cell.
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Meng, Shujuan, Minmin Zhang, Meng Yao, et al. "Membrane Fouling and Performance of Flat Ceramic Membranes in the Application of Drinking Water Purification." Water 11, no. 12 (2019): 2606. http://dx.doi.org/10.3390/w11122606.

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Membrane technologies have been widely applied in surface water treatment for drinking water purification. The main obstacles to the large scale application of membranes include membrane fouling, energy consumption and high investment. This study systematically investigated the performance of a hybrid system including in-situ coagulation and membrane module. The key parameters of a membrane system, including initial flux, operation mode (intermediate or continuous, time intervals, backwashing and aeration) was comprehensively investigated. In addition, the treatment performance in terms of turbidity, organic matter removal, membrane fouling and cleaning, and the effect of coagulants, were also studied. It was found that flat ceramic membranes with in-situ coagulation for surface water treatment performed much better without aeration and frequent backwashing, which gave interesting and important implications for future applications of a flat ceramic membrane, especially in drinking water purification. The hybrid system can achieve a high-water flux of 150 L/m2·h (LMH) for 8 h operation without aeration and backwash. The removal of turbidity, UV254 and COD can achieve 99%, 85% and 81%, respectively. The cake layer on the membrane surface formed from the coagulation flocs turned out to prevent the membrane to be exposed to organic pollutant immediately which minimized the fouling problem. In addition, the fouling layer on the membrane surface can be easily cleaned by air scouring and backwash at the end of experiments, with a water flux recovery of higher than 90%. These results in this study provided an alternative strategy for membrane fouling control and energy conservation.
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Linghu, Jianshe, Jinhua Chen, Jianbin Zhou, and Wangang Jiang. "A “full spectrum-domain-time” coalbed gas utilization model and its application in mining area." Energy Exploration & Exploitation 39, no. 4 (2021): 1235–45. http://dx.doi.org/10.1177/01445987211001179.

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Coalbed gas (CBG) has been widely used as an important energy source. However, its utilization and allocation system is imperfect in mining areas. During the utilization process, a large amount of CBG is discharged into the air, causing environmental pollution. In this study, we proposed a “full spectrum-domain-time” CBG utilization model. In this model, by combining high methane concentration gas power generation, low methane concentration gas purification, and ultra-low methane concentration gas thermal storage and oxidation utilization, we were able to utilize CBG with full-spectrum of methane concentrations. In addition, by establishing CBG transportation and storage system in mining area, we were able to realize CBG supply in the entire network domain. Furthermore, based on the time series prediction algorithm, the CBG demand of different mining areas is predicted and regulatorily met by real time allocation. Through these three steps, an efficient “full spectrum-domain-time” CBG utilization system was formed and practically applied in Yangquan mining area. The application results showed that under the comprehensive control of “full spectrum-domain-time” CBG utilization model, CBG with methane concentration ≥0.2% could be used in the mining area and its utilization rate increased year by year, reaching the highest of 77.15%. Overall, our study provided a reference for the efficient CBG utilization in the mining area.
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Ткач, Михайло Романович, Борис Георгійович Тимошевський, Аркадій Юрійович Проскурін та Юрій Миколайович Галинкін. "МЕТАЛОГІДРИДНИЙ АКУМУЛЯТОР-КОМПРЕСОР ВОДНЮ З АВТОМАТИЧНОЮ СИСТЕМОЮ УПРАВЛІННЯ ТА КОНТРОЛЮ". Aerospace technic and technology, № 5 (29 серпня 2020): 53–60. http://dx.doi.org/10.32620/aktt.2020.5.07.

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A project of metal hydride hydrogen compressor is presented, which can be used as an element of refueling complexes, hydrogen storage and compression systems. The capacity of the developed sample is 40 kg of hydrogen, the mass is 4,8 ton, and the maximum compression pressure is 15 MPa. The base metal hydride material on the basis of which this compressor battery model is developed is LaNi4.5Al0.5. the sorption capacity of hydrogen of which is determined experimentally, and is at least 1.38 % by weight. A feature of the developed compressor battery is the use of air cooling, the presence of an automatic monitoring and control system, I allow a number of operations to be performed in automatic mode, and the use of software, electrical and automatic protection against overpressure. Each accumulator-compressor is made in the form of a steel box in which six blocks (capsules) are placed. The block, respectively, is made in the form of a steel coaxial multilayer cylinder, on the outer side of which there is a heating element and a layer of thermal insulation. In the middle of the cylinder is a sealed capsule filled with metal hydride material. Capsules are interconnected with the collector through a piping system. Also, the piping system is equipped with an inlet valve connecting the volume formed with an external receiver. The battery-compressor is equipped with an external receiver, to which a hydrogen, vacuum, nutrient and consumable outline is connected. Each circuit is equipped with an electromagnetic valve, as well as measuring devices, which makes it possible to carry out automatic control of parameters and automatic control of the device in accordance with the operating mode. A list of equipment is presented, on the basis of which a system of automatic control and monitoring, a block diagram of the main operating modes, an interface of the developed software are developed. Depending on the mode chosen by the operator, the automatic control and monitoring system allows activation of metal hydride materials, purification of contaminants of harmful impurities, sorption and desorption of hydrogen.
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Abd Allah, Elrafie Ahmed, Abdel Elhameed M. O. Kasif, Yasir Awad Alla Mohamed, and Ayat Abdel Elkhalig H. Mahmoud. "Simulation of ethylene oxide production from ethylene cholorhydrin." Proceedings of the Voronezh State University of Engineering Technologies 84, no. 1 (2022): 222–25. http://dx.doi.org/10.20914/2310-1202-2022-1-222-225.

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This research has been performed in the Ethylene Oxide production process. It is a flammable and colorless gas at temperatures above 11 °C. It is an important commodity chemical for the production of solvents, antifreeze, textiles, detergents, adhesives, polyurethane foam, and pharmaceuticals. Small amounts of Ethylene Oxide [EO] are used in manufacturing fumigants and sterilants for spices and cosmetics, as well as hospital sterilization for surgical equipment. Modern Ethylene oxide [EO] productions employ either air or oxygen (O2)to oxidize ethylene (C2H4) with a silver catalyst on an alumina oxide carrier[Ag/Al2O3]catalyst packed in a fixed-bed reactor (plug-flow reactor)but the oxygen-base reaction process is more desirable here we used oxygen. Mainly two reactions occur, partial oxidation of ethylene to ethylene oxide and total oxidation of ethylene to carbon dioxide and water. The design models of the process in this research based on a three-part system. They are: the reaction system, absorption system and Ethylene Oxide [EO] purification system. The largest cost in production of ethylene oxide is ethylene therefore, it’s important to optimize the selectivity towards ethylene oxide and thus reduce the consumption of Ethylene. The aim of this work is to create a simulation model of the Ethylene Oxide production process from Ethylene using Aspen Hysys V9. Also to knowing the optimum operational conditions (temperature –pressure –flow rate) for the oxidation reactions of Ethylene. The simulation was running three times with various operational conditions to make a good result. The conclusion was that during operational time the activation energy increased for both reactions which have to be compensated with increasing reactor temperature. At the same time the selectivity for producing Ethylene Oxide decreases, i.e. more carbon dioxide and water are formed. The simulation models yield Ethylene Oxide with purity of 99.2%.
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Karabanov, Sergey M., Andrey S. Karabanov, Dmitriy V. Suvorov, et al. "Catalytically Active Coatings on the Basis of Titanium Dioxide for Ozone Destruction." MRS Proceedings 1806 (2015): 31–40. http://dx.doi.org/10.1557/opl.2015.673.

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ABSTRACTCreation of high efficiency and safe air purification systems is the important task caused by their wide use in living quarters, medical institutions, industrial areas. The most effective cleaning systems are the ozone based ones which is formed as the result of the corona or barrier discharge. The main disadvantage of these purification systems is high concentration of ozone in discharge air. The paper concentrates on the study of catalytically active coatings on the basis of titanium dioxide for effective destruction of ozone inside air purification systems. It is shown that use of catalytically active coatings of collecting electrodes on the basis of titanium dioxide and manganese oxide allows to decrease significantly (20-50%) the ozone concentration at the filter exit. As the results of the researches the following requirements have been determined: -
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KUTZ, GEORGE F. "A COMPRESSED AIR SYSTEM OF FORCED DRAFT." Journal of the American Society for Naval Engineers 1, no. 4 (2009): 330–36. http://dx.doi.org/10.1111/j.1559-3584.1889.tb00533.x.

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Dissertations / Theses on the topic "Forced air purification system"

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Мережаний, Ю. Г., та В. С. Антонюк. "Система фільтрації приточного повітря в виробничих приміщеннях прецизійного складального виробництва". Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/11370.

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Serem, Vincent Kipyego Arap. "Forced air solar system for drying of Arabica coffee in Kenya." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63902.

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Holzinger, Felix. "Development of a Concept for Forced Response Investigations." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/46074.

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Striving to improve performance and lower weight of aircraft engines, modern compressor blades become thinner and lighter but higher loaded resulting in an increased vulnerability towards flutter. This trend is further aggravated through blisk designs that diminish structural damping and therewith flutter margin. Modern 3D wide-chord blade designs result in complex structural behaviors that add to the difficulty of correctly predicting flutter occurrence. To counteract above tendencies by driving the physical understanding of flutter and thereby helping to improve aero engine design tools, free flutter as well as forced response will be investigated in the 1.5 stage transonic compressor at TU Darmstadt. Aim of the forced response campaign is to determine the system damping in the stable compressor regime. Hence a novel excitation system capable of dynamically exciting specific rotor blade modes is needed. It is aim of the present work to find a promising concept for such a system. In the present work, the requirements for an excitation system to be used in the TUD compressor are defined with respect to achievable frequency, phase controllability, transferred excitation level, mechanical robustness, integrability and cleanliness. Different excitation system concepts, i.e. oscillating VIGVs, rotating airfoils, tangential and axial air injection are investigated numerically. An evaluation of the results obtained through 2D numerical studies proposes axial air injection as the most favorable concept.
Master of Science
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Dlangamandla, Cynthia. "Bioflocculant dissolved air flotation system for the reduction of suspended solids-lipids-Proteinaceous matter from poultry slaughterhouse wastewater." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2485.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2016.
Poultry slaughterhouse wastewater (PSW) contains organic matter that can be degraded by microorganisms. Such matter can further be used by the microbial community as a nutrient source for growth. Moreover, this type of wastewater also contains a high quantity of particulate matter, lipids and proteins, including antimicrobial compounds such as triclosan (TCS) and trichlorocarbanilide (TCC) used during cleaning and sanitising of processing facilities. Lipids and particulate matter lead to clogging of pipes and fouling of diffusers in the wastewater treatment plants (WWTPs). To overcome this problem, a pre-treatment system such as a dissolved air flotation system (DAFs) in which synthetic flocculants are used, is commonly used prior to the biological treatment of the wastewater. Synthetic flocculants add to the environmental burden associated with the use of synthetic compounds, particularly when these compounds are used in WWTPs. This study focused on the reduction of suspended solids, lipids and proteinaceous matter using a bioflocculant- supported DAF for the treatment of PSW.
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Randall, Andrew A. "Operational and exocellular biopolymer characteristics of sludges generated from an air products and a convential activated sludge system." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/43890.

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This study compared the sludge characteristics of a lab-scale Air Products (A/O) and a conventional activated sludge system. The sludges were analyzed for operational properties and the exocellular biopolymers of each sludge was characterized. Operational analysis mainly consisted of measurements of settling (SVI) and dewatering (specific resistance, CST) parameters at each sludge age. Biopolymers were measured using pH extraction followed by gel filtration and subsequent analysis for carbohydrate and protein concentrations. The results showed a high degree of similarity between the two systems both operationally and with respect to biopolymer characteristics. The A/0 system did produce a lower effluent soluble COD at sludge ages below 5 days. Also, the A/O system showed some consistent differences in the distribution of bound and unbound fractions of protein and carbohydrate ECP but these had no discernible· effect on sludge operational characteristics. In addition relationships between unbound ECP and effluent BOD, bound HMW ECP and SVI, and phosphorus and Mg uptake were observed, with varying degrees of consistency, in this study.
Master of Science
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Yang, Linda, and Robert Liao. "Water Purification : Research on the Energy Supply of Air Gap Membrane Distillation for Access to Clean Water." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-282905.

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Water stress is an ongoing problem in many places in the world, while the demand for clean and safe freshwater is growing due to the increasing population. In many developing countries, water supplies often are contaminated with arsenic, fluoride, etc. Therefore, it is important to realize that water scarcity and contamination issues concern only one sector but many. HVR Water Purification AB is developing a water purification prototype – ELIXIR 500 - using the air gap membrane technology and is implemented in Odisha, India, aiming to supply with 200 litre water daily. This thesis aims to estimate future energy sources to supply this prototype and explore the possibilities of using only renewable energy resources from technical, economic, and environmental perspectives. These are achieved by firstly identifying the energy possibilities in Odisha, India, and then calculating the feasibility of each solution chosen and finally analyzing the results. Among the energy sources, which are power grid, wind and solar power, diesel generator and solar-diesel hybrid system. It is found that the energy source to the prototype supplied by the power grid is 0.057 USD per litre water, which is the cheapest option. However, it is not feasible due to the lack of electrification from the local network. Meanwhile, the solar-diesel hybridized energy system is the most economical option if renewable energy sources are integrated with 0.11 USD per litre water.
Vattenstress ett pågående problem på många ställen i världen medan efterfrågan på rent och säkert dricksvatten växer på grund av den ökande befolkningen. I många utvecklingsländer är vattenförsörjningen ofta förorenade med arsenik, fluor osv. Det är därför viktigt att inse att vattenbrist och föroreningar inte bara rör en sektor utan många. HVR Water Purification AB utvecklade en prototyp för vattenrening - ELIXIR 500 - med hjälp av luftspaltmembrantekniken (eng: air gap membrane distillation och implementeras redan i Odisha, Indien, med målet att förse 200 liter rent vatten dagligt. Denna avhandling syftar till att uppskatta de framtida energikällorna för att tillhandahålla denna prototyp och utforska möjligheterna att endast använda förnybara energikällor ur tekniska, ekonomiska och miljömässiga perspektiv. Dessa uppnås genom att först identifiera de olika energimöjligheter i Odisha, Indien, följt av beräkningar om utförbarhet för varje vald lösning och slutligen en analys av resultaten. Bland energikällorna elnät, vind, sol, diesel generator och sol-diesel hybrid system har visat sig att energikällan till prototypen som levereras av elnätet som kostar 0.057 USD per liter vatten som det billigaste alternativet, men det är inte möjligt på grund av bristen på elektrifiering från det lokala elnätet. Å andra sidan är det hybridiserade energiskombinationen med solkrafts och diesel det billigaste alternativet om förnybara energikällor ska integreras, resultatet visade att vara 0.11 USD per liter vatten.
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Mukandi, Melody. "Modelling of a bioflocculant supported dissolved air flotation system for fats oil and grease laden wastewater pretreatment." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2637.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2017.
In the recent past, the poultry industry in South Africa has grown due to an increased demand of poultry products as a result of population growth and improved living standards. Furthermore, this has led to poultry slaughterhouses generating high strength wastewater which is laden with a high concentration of organic and inorganic pollutants from the slaughtering process and sanitation of equipment and facilities. As a result, South Africa has promulgated restrictions and a set of quality standards for effluent discharged into the environment to minimize ecological degradation and human health impact. Hence, there is a need for improved Poultry Slaughterhouse Wastewater (PSW) pre-treatment prior to either discharge into municipal wastewater treatment plants (WWTP) or on-site secondary treatment processes such as anaerobic digesters. Additionally, amongst the pre-treatment methods for Fats, Oil and Grease (FOG) laden wastewater, flotation remains the most popular with Dissolved Air Flotation (DAF) system being the most applied. However, modelling and optimization of a biological DAF system has never been attempted before in particular for a bioflocculant supported DAF (BioDAF) for PSW pre-treatment. Process modelling and optimization involves process adjustment to optimize influential parameters. In this study, Response Surface Methodology (RSM) was used to develop an empirical model of a BioDAF for pre-treatment of PSW, for which a bioflocculant producer including production conditions, flocculant type and its floc formation mechanism, were identified. Twenty-one (n = 21) microbial strains were isolated from the PSW and their flocculation activity using kaolin clay suspension (4g/L) was quantified, with a mutated Escherichia coli (mE.coli) [accession number LT906474.1], having the highest flocculation activity even in limited nutrient conditions; hence, it was used for further analysis in other experiments. Furthermore, the optimum conditions for bioflocculant production achieved using RSM were pH of 6.5 and 36°C conditions which induced instantaneous bioflocculant production with the highest flocculation activity. The bioflocculant produced by the mE.coli showed the presence of carboxyl/amine, alkyne and hydroxyl functional groups, which was indicative that the bioflocculant contained both polysaccharides and some amino acids.
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Watel, Barbara. "Etude des échanges convectifs sur un cylindre aileté en rotation, soumis a un courant d'air parallèle aux ailettes." Valenciennes, 1997. https://ged.uphf.fr/nuxeo/site/esupversions/29267151-660f-45b9-af69-34482a8dce42.

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L'évaluation expérimentale des échanges convectifs avec l'air est faite sur des ailettes circulaires d'un arbre en rotation à vitesse uniforme et soumises ou non à un courant d'air parallèle à leurs faces. Un banc d'essais a été conçu pour mesurer, par thermographie infrarouge, l'évolution temporelle des températures suivant un rayon d'une ailette durant son refroidissement, cette dernière ayant été préalablement chauffée. Une analyse théorique des phénomènes thermiques se produisant dans une ailette, en régime transitoire, permet de déterminer le coefficient d'échange moyen de celle-ci avec l'air. L’étude bibliographique de la structure d'écoulement entre les ailettes en fonction de leur espacement, de leur vitesse de rotation et de la vitesse du courant d'air a été réalisée. Cette étude sert de base à l'analyse physique de la variation du coefficient d'échange en fonction des différents paramètres. Les essais avec les ailettes en rotation, soumises ou non à un courant d'air parallèle, ont permis de mettre en évidence les domaines d'influence de la convection forcée due à la rotation, de la convection forcée due au courant d'air et de la convection naturelle. Les résultats obtenus sur le coefficient d'échange en convection forcée sont justifiés par la représentation du champ des vitesses de l'écoulement entre les ailettes par vélocimétrie par images de particules. L’ensemble des essais réalisés peuvent être corrélés avec un écart relatif inférieur à 5% par une équation générale.
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Vlasák, Vojtěch. "Využití odpadního tepla." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240291.

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This dissertation is divided into three parts. The first part deals with the use of waste heat in the theoretical plane, where methods and possibilities of using this heat are described. Part Two, which is computational, deals with the suggestion of heating industrial halls with an adjacent, mostly office, building in two variants, then it goes on to also deal with the concept of equal pressure forced ventilation, a proposal of air curtains and preparation of hot water, where the heat source is a boiler. In the last part an experiment took place which investigated the conversion efficiency of thermal to electric energy.
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Zaťková, Miroslava. "Tepelná čerpadla ve vytápění." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226003.

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This master´s thesis addresses heating of the new three - storey office building, which is located in Brno Pisárky. The heating system is designed as a low-temperature system with forced circulation of water using mostly panel radiators. As the heat source was designed two variants. The first heat source is the heat pump air - water, which is installationed inside. The second heat source is a gas condensing boiler. The part of design is preparation hot water. Ventilation of the building is equal-forced. Experimental part of master´s thesis is focused on measuring the amount of electricity produced per year by photovoltaic panels on the existing house in Brno Pisárky. Thesis also includes measuring outdoor temperature and intensity of solar radiation. The result is a comparison of the need for electricity for the heat pump for heating family house, total electricity consumption family house and amount of electricity produced by photovoltaic panels.
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Books on the topic "Forced air purification system"

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Starn, J. Jeffrey. Simulation of ground-water flow and application to the design of a contaminant removal system, Loring Air Force Base, Maine. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Jeffrey, Starn J. Simulation of ground-water flow and application to the design of a contaminant removal system, Loring Air Force Base, Maine. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Starn, J. Jeffrey. Simulation of ground-water flow and application to the design of a contaminant removal system, Loring Air Force Base, Maine. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Jeffrey, Starn J. Simulation of ground-water flow and application to the design of a contaminant removal system, Loring Air Force Base, Maine. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Jeffrey, Starn J. Simulation of ground-water flow and application to the design of a contaminant removal system, Loring Air Force Base, Maine. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Jeffrey, Starn J. Simulation of ground-water flow and application to the design of a contaminant removal system, Loring Air Force Base, Maine. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Starn, J. Jeffrey. Simulation of ground-water flow and application to the design of a contaminant removal system, Loring Air Force Base, Maine. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Jang, W. Cascade air-stripping system for removal of semi-volatile organic contaminants: Feasibility study. AWWA Research Foundation and American Water Works Association, 1990.

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Air conditioning the cool and E-Z way: Home owners facts, tips, tests and maintenance for your forced air cooling and heating system. Nova Sun Publishing, 2001.

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Office, General Accounting. Operation Desert Storm: Health concerns of selected Indiana Persian Gulf War veterans : report to congressional requesters. The Office, 1995.

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Book chapters on the topic "Forced air purification system"

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Gandhi, Palak, Kartik Upadhyay, Ashwani Kumar Yadav, and Vaishali. "Designing a Smart System for Air Quality Monitoring and Air Purification." In Intelligent Computing Techniques for Smart Energy Systems. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0214-9_88.

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Gangal, Ashish, and Vaibhav Jain. "Performance Analysis of Alternate Purification System in Air Conditioning System." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5463-6_59.

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Neven, Lisa, and Shelley Johnson. "Combination Hot Forced Air Treatments and Controlled Atmosphere Treatments: CATTS—Controlled Atmosphere Temperature Treatment System." In Novel Postharvest Treatments of Fresh Produce. CRC Press, 2017. http://dx.doi.org/10.1201/9781315370149-10.

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Dziedzic, Klaudia. "Tuning the Fractional Order PID Controller in the Forced Air Heating System Using Biologically Inspired algorithms." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40971-5_13.

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Su, Yi, Gang Liu, and Lei Zhang. "Research on the Design of Human Settlement System and Personal Air Purification System Under the Background of Internet of Things." In Lecture Notes in Computer Science. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94370-1_8.

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Yang, Kun. "The Design and Application of the Air Purification System of the Meteorology Command Vehicle Based on the Photo-catalytic Technology." In Lecture Notes in Electrical Engineering. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-48224-7_21.

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Ahmad, Mulla Irfan, S. M. Jameel Basha, V. Viswanatha Chari, and G. Srinivas Kumar. "Investigation of Performance of Vapor Compression Refrigeration System with Forced Air-Cooling Condenser With R600a and Hydrocarbon Mixture (R290 + R600a) as Refrigerant." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4739-3_89.

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Rasimphi, Thilivhali Eugene. "Assessment of the Biogas Technology Potential in Reducing Indoor Air Pollution." In Global Perspectives on Air Pollution Prevention and Control System Design. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7289-3.ch010.

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Many of the rural communities in developing countries are forced to rely on the traditional energy sources such as firewood, dung, and crop residues. These traditional methods are often expensive and/or time-consuming. Today, more than 90% of energy requirements globally are met by burning coal and natural gases with resultant release of harmful pollutants with a serious threat to the environment and human health. Twentieth century has witnessed great challenge to the progress of human development because of scarcity of energy and the principal infrastructure for the development of technology. The chapter reviews the potential of biogas technology to solve the problem of indoor air pollution in rural households. Useful information on the project impact was collected through villages' questionnaires, interviews, field trips, and community engagement workshops, and all the viability demonstrated from rigorous socioeconomic and environmental benefits considerations. The results show that biogas technology is sustainable and provides energy security while combating climate change.
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Boumahdi, Meryeme, Chaker El Amrani, and Siegfried Denys. "An Innovative Air Purification Method and Neural Network Algorithm Applied to Urban Streets." In Research Anthology on Artificial Neural Network Applications. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-6684-2408-7.ch064.

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In the present work, multiphysics modeling was used to investigate the feasibility of a photocatalysis-based outdoor air purifying solution that could be used in high polluted streets, especially street canyons. The article focuses on the use of a semi-active photocatalysis in the surfaces of the street as a solution to remove anthropogenic pollutants from the air. The solution is based on lamellae arranged horizontally on the wall of the street, coated with a photocatalyst (TiO2), lightened with UV light, with a dimension of 8 cm × 48 cm × 1 m. Fans were used in the system to create airflow. A high purification percentage was obtained. An artificial neural network (ANN) was used to predict the optimal purification method based on previous simulations, to design purification strategies considering the energy cost. The ANN was used to forecast the amount of purified with a feed-forward neural network and a backpropagation algorithm to train the model.
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Vasiliev, Alexey Nicolaevich, Alexey Alexeevich Vasiliev, Dmitry Budnikov, Dmitry Tikhomirov, and Asan Bekeshovich Ospanov. "Control and Optimized Management of Grain Drying in Forced-Aerated Bins." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7573-3.ch008.

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In the chapter, both informational and system-based approaches have been applied to the analysis of grain drying process as an interaction of two systems, namely, “drying agent” and “grain layer.” It made it possible to evaluate the information content of the process. Analytic expression has been obtained for grain layer informational entropy variations which enabled to make the conclusion that an adequate physical description of grain drying process has to include ambient air parameters control, as well as that of drying agent's parameters in its exit out of a grain layer, as well as parameters of both drying agent and grain in one point of grain layer. A mathematical model of heat-and-moisture exchange in dense grain layer has to be applied. As a result of modeling, it has been proved that the sensors of both drying agent and grain parameters have to be located at a distance of 10 to 11 cm from the central cylinder of the forced-aerated drying bin.
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Conference papers on the topic "Forced air purification system"

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Hong, Xiliang, Jianhong Chen, Deren Sheng, and Wei Li. "Exergoenvironmental Evaluation for a Coal-Fired Power Plant of Near-Zero Air Pollutant Emission." In ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3309.

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Owing to the growing environmental concerns, super-critical and ultra-supercritical coal-fired power plants dominate the electricity generation with the demand of near-zero air pollutant emission in China. Therefore, it is highly expected to assess the environmental impact and optimize the design at global and local levels. Exergoenvironmental analysis is a valid approach to investigate the formation of environmental impacts (EIs) associated with energy conversion systems at the component level. It generates information crucial for designing systems with a lower overall environmental impact, based on life cycle assessment (LCA) and exergy analysis. A 600 MW supercritical coal-fired system with and without dust, SO2 and NOx mitigation controls was analyzed. Heat transfer in the boiler, condenser (CND), low pressure cylinder (LP), air preheater (APH) show high potential to decrease the environmental impact due to high exergy destructions. The deaerator (DEA), induced draft fan (IDF), forced draft fan (FDF) should be focussed on construction design and manufacturing optimization. Purification units reveal high benefit for reducing EI produced by coal combustion, but there is a large space for the EI saving for it. The specific EI of electricity in China is much greater than European.
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Mirzaee Kakhki, Iman, Majid Charmchi, Hongwei Sun, and Minghao Song. "Numerical Simulation of Air Sampling in Micro Scale Rising Bubbles." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17510.

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Capturing particles, mainly bio-particles, such as viruses and spores, from the air into a liquid is critical for air purification and analysis of the sampling systems. In the conventional impinger sampling systems, the air bubbles carrying the particles are injected into a liquid column. The particles are captured from the air into the liquid as the bubbles travel to the surface due to the buoyancy forces. This paper focuses on the numerical simulation of a newly developed microfluidic air sampling system. In this system, a microscale liquid column, equipped with an array of microchannels as pressure controlled gas injection points, is used for gas bubbling process for air sampling purpose. The air bubbles containing the particles are injected into the bottom of the microscale column filled with a liquid (such as water). As the microscale bubbles (of about 250∼500 microns) travel to the surface, a shear driven flow will develop within the bubbles and the airborne particles will follow the flow toward the boundary of the bubble. The inertia force of particles will result in the departure of particles from the flow into the liquid. The fraction of the particles departed from air bubble and trapped in the liquid represents the collection efficiency of the air sampler. For tracking the liquid/gas interface, the Volume-of-Fluid (VOF) method along with Youngs’ algorithm for geometric reconstruction of the free surface is used. The particle trajectories are predicted by integrating the force balance on each particle, which is based on a Lagrangian frame of reference. It is found that in addition to the particle departure during the bubble rising, a considerable amount of particles are trapped in the liquid during the air injection and bubble formation which may be due to the high velocity of the injected air and oscillation of the bubble interface. It is worth noting that this is the first time that the numerical simulation is performed to understand the whole air sampling process which was never addressed in the past. As a comparison, an experimental study was conducted to measure the collection efficiency. The fluorescent polystyrene latex particles with different diameters (diameters: 0.5, 1, 2 microns) were used in the experiment. The experimental results were compared with that of numerical simulation. Both the experiments and computations revealed that a collection efficiency of 90% can be achieved by the microfluidics based impinger, which is much higher than that of conventional, macro-scale, impinger systems. In addition to verifying the existing experimental work, this numerical simulation method provides a valuable tool to design and improve new generations of air sampling systems.
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Maduri, Praveen Kumar, Ritika Nigam, and Pratyusha Sharma. "Centralized Air Purification System Using Ai." In 2021 3rd International Conference on Advances in Computing, Communication Control and Networking (ICAC3N). IEEE, 2021. http://dx.doi.org/10.1109/icac3n53548.2021.9725566.

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Subrahmanyam, B. Ravi, Avanish Gautam Singh, and Prabhakar Tiwari. "Air Purification System for Street Level Air Pollution and Roadside Air Pollution." In 2018 International Conference on Computing, Power and Communication Technologies (GUCON). IEEE, 2018. http://dx.doi.org/10.1109/gucon.2018.8674934.

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Emmenthal, K. D., C. Müller, O. Schäfer, and R. H. Strozyk. "Air-Forced Injection System for Spark Ignition Engines." In SAE International Congress and Exposition. SAE International, 1985. http://dx.doi.org/10.4271/850483.

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"A PLANT MATERIAL-BASED AIR PURIFICATION SYSTEM FOR SWINE ODOUR REDUCTION." In International Conference on Biomedical Electronics and Devices. SciTePress - Science and and Technology Publications, 2011. http://dx.doi.org/10.5220/0003127101200124.

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Merete Lyngbye, Michael Jørgen Hansen, and Kristoffer E.N Jonassen. "New Air Purification System for Pig Production Units Based on Membrane Technology." In Livestock Environment VIII, 31 August - 4 September 2008, Iguassu Falls, Brazil. American Society of Agricultural and Biological Engineers, 2008. http://dx.doi.org/10.13031/2013.25509.

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Sayma, Abdulnaser I., Mehdi Vahdti, Mehmet Imregun, and John Marshal. "Low Pressure Compression System Effects on Fan Assembly Forced Response." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27665.

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This paper describes a numerical modelling methodology for fan blade forced response calculations by considering the low-pressure compression system (LPCS) as a whole in order to include flow distortions caused by the asymmetric flight intake upstream, and the pylon downstream. Emphasis also is placed on blade mistuning or mis-placement which may be due to inherent manufacturing and assembly tolerances, or to small inservice displacements. Several levels of geometric complexity were used in the analysis, ranging from an isolated fan bladerow to a complete LPCS of a large-diameter aero-engine, consisting of the intake duct, the fan assembly, the outflow guide vanes, the pylon and a downstream nozzle. The aerodynamic model was coupled to a finite element model of the fan assembly for computing the blade vibration levels. The study revealed two major findings. The first is the unsteady forcing under one engine-order (1EO) excitation is found to be linked to the mean shock position on the fan blade, the highest forcing occurring when the shock is just swallowed since this position is particularly sensitive to pressure fluctuations. The second finding is that the 1EO fan assembly forcing resulting from an asymmetric intake and the pylon are of comparable magnitude but their relative phasing is the key parameter in determining the overall fan forced response levels.
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Schechter, Michael M., and Michael B. Levin. "Air-Forced Fuel Injection System for 2-Stroke D.I. Gasoline Engine." In International Congress & Exposition. SAE International, 1991. http://dx.doi.org/10.4271/910664.

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Carnevale, Ennio, Giacomo Migliorini, Stefano Zecchi, and Bart Olmi. "Three-Dimensional Forced Air Cooling System Analysis of a Scooter Engine." In ASME 2002 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ices2002-467.

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Internal combustion engines must match several requirements such as good efficiency and low fuel consumption rate; when they are applied on scooter they are subject to some other restrictions. Nowadays, both low pollutant emissions and low noise level are requested for this engine since scooters are usually city vehicles. To match these requirements several aspects must be investigated: one of these may be the cooling system. There are usually three cooling methods, i.e. free stream air cooling, liquid cooling and forced air cooling. The first one is usually not employed in scooter engines because of its arrangement inside the scooter body (due to functionality and aestheticism). The second one may present some plant complications caused by the heat exchanger and ducts. A forced air cooling system presents usually lower complication, lower weight and greater reliability. Nevertheless, in order to keep engine temperatures below lubricant and structural limit, high mass flow rate may be necessary since air has smaller coolant efficiency compared to liquids. Moreover cooling air, supplied by a fan, requires high pumping power which may be excessive at high rotational speed; the fan itself may produce excessive noise reducing comfort. Sometimes, it may be hard to define the air flow demands in order to properly cool the critical parts (i.e. cylinder head); poor design may result in an excessive air mass flow demand and high pressure losses. Consequently the fan requires an excessive power and emits high noise level. Proper coolant distribution around the cylinder and the engine head reduces the overall air mass flow demand, rising indirectly engine efficiency. Usually the geometry of a forced air cooled engine is quite complex because of fins and other internal passages. To study coolant distribution and heat transfer a three-dimensional approach is then required. Computational fluid dynamic calculations, provided by commercial codes, can give useful suggestions about flow distribution around a finned cylinder. This paper will show an analysis of a typical air cooled scooter engine. Air mass flows and cooling efficiency are shown at several engine rotational speeds.
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Reports on the topic "Forced air purification system"

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Tepper, Gary. The SELEX Air Purification System. Defense Technical Information Center, 2010. http://dx.doi.org/10.21236/ada518955.

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Walker, Iain S. Register Closing Effects on Forced Air Heating System Performance. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/822806.

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Walker, Iain S., Darryl J. Dickerhoff, and William W. Delp. Residential Forced Air System Cabinet Leakage and Blower Performance. Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/983245.

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Wu, Chang-Yu, Brian Damit, Qi Zhang, et al. RHELP (Regenerative High Efficiency Low Pressure) Air Purification System. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada511241.

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Walker, Iain. Sensitivity of forced air distribution system efficiency to climate, duct location, air leakage and insulation. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/792920.

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Sullivan, David. Unmanned. Evaluation of Bauer High Pressure Breathing Air P-5 Purification System. Defense Technical Information Center, 1991. http://dx.doi.org/10.21236/ada243486.

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Sullivan, George D. Evaluation of BAUER K-20 Diesel Powered High Pressure Breathing Air Compressor and the P-5 Purification System (Unmanned). Defense Technical Information Center, 1991. http://dx.doi.org/10.21236/ada242554.

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Willits, Daniel H., Meir Teitel, Josef Tanny, Mary M. Peet, Shabtai Cohen, and Eli Matan. Comparing the performance of naturally ventilated and fan-ventilated greenhouses. United States Department of Agriculture, 2006. http://dx.doi.org/10.32747/2006.7586542.bard.

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The objectives of this project were to predict the performance of naturally and fan-ventilated greenhouses as a function of climate, type of crop, evaporative cooling and greenhouse size, and to estimate the effects of the two cooling systems on yield, quality and disease development in the different crops under study. Background In the competitive field of greenhouse cultivation, growers and designers in both the US and Israel are repeatedly forced to choose between naturally ventilated (NV) and fan ventilated (FV) cooling systems as they expand their ranges in an effort to remain profitable. The known advantages and disadvantages of each system do not presently allow a clear decision. Whether essentially zero operating costs can offset the less dependable cooling of natural ventilation systems is question this report hopes to answer. Major Conclusions US It was concluded very early on that FV greenhouses without evaporative pad cooling are not competitive with NV greenhouses during hot weather. During the first year, the US team found that average air temperatures were always higher in the FV houses, compared to the NV houses, when evaporative pad cooling was not used, regardless of ventilation rate in the FV houses or the vent configuration in the NV houses. Canopy temperatures were also higher in the FV ventilated houses when three vents were used in the NV houses. A second major conclusion was that the US team found that low pressure fogging (4 atm) in NV houses does not completely offset the advantage of evaporative pad cooling in FV houses. High pressure fog (65 atm) is more effective, but considerably more expensive. Israel Experiments were done with roses in the years 2003-2005 and with tomatoes in 2005. Three modes of natural ventilation (roof, side and side + roof openings) were compared with a fan-ventilated (with evaporative cooling) house. It was shown that under common practice of fan ventilation, during summer, the ventilation rate is usually lower with NV than with FV. The microclimate under both NV and FV was not homogeneous. In both treatments there were strong gradients in temperature and humidity in the vertical direction. In addition, there were gradients that developed in horizontal planes in a direction parallel to the direction of the prevailing air velocity within the greenhouse. The gradients in the horizontal direction appear to be larger with FV than with NV. The ratio between sensible and latent heat fluxes (Bowen ratio) was found to be dependent considerably on whether NV or FV is applied. This ratio was generally negative in the naturally ventilated house (about -0.14) and positive in the fan ventilated one (about 0.19). Theoretical models based on Penman-Monteith equation were used to predict the interior air and crop temperatures and the transpiration rate with NV. Good agreement between the model and experimental results was obtained with regard to the air temperature and transpiration with side and side + roof ventilation. However, the agreement was poor with only roof ventilation. The yield (number of rose stems longer than 40 cm) was higher with FV
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