Dissertations / Theses on the topic 'Forced air purification system'
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Мережаний, Ю. Г., and 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.
Full textSerem, 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.
Full textHolzinger, Felix. "Development of a Concept for Forced Response Investigations." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/46074.
Full textMaster of Science
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.
Full textPoultry 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.
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.
Full textMaster of Science
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.
Full textVattenstress 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.
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.
Full textIn 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.
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.
Full textVlasák, Vojtěch. "Využití odpadního tepla." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240291.
Full textZaťková, Miroslava. "Tepelná čerpadla ve vytápění." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226003.
Full textDufek, Martin. "Vytápění bytového domu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225581.
Full textVacenovský, Jan. "Návrh zařízení pro úpravu mikroklimatu v rekonstruovaném rodinném domě." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378499.
Full textIanniciello, Lucia. "Etude du comportement thermique d'une batterie électrochimique thermorégulée par matériaux à changement de phase pour le véhicule électrique." Thesis, Paris Sciences et Lettres (ComUE), 2018. http://www.theses.fr/2018PSLEM020/document.
Full textLi-ion battery thermal management is essential for electric vehicles (EVs), to ensure an optimal autonomy and lifespan of those batteries. Usually, air or coolant circuits are employed as thermal management systems. However, those systems are expensive in terms of investment and operating costs and must be dimensioned on the maximal power to be extracted. The use of phase change materials (PCMs) as latent heat storage medium allowing the absorption of the heat to be dissipated as latent heat may represent an alternative cheaper and easier to operate. In fact, PCMs can passively store the excess heat produced by a device and be used as passive systems. However, PCMs have several drawbacks like the difficulty to discharge the stored thermal load which limits the system’s cyclability or their low thermal conductivity which limits their heat transfer capacity. To solve the problem of the PCM regeneration, an additional active system can be added, dimensioned on a moderate power; the whole becomes a semi-passive system. In this study, a thermal management system composed of a PCM and forced air convection is evaluated. This system permits to combine the respective advantages of the two techniques. A model of the system is developed for one battery cell. A comparison with forced air convection only points out the usefulness of the PCM. To overcome the PCM low thermal conductivity, a highly conductive material can be added to the PCM permitting to obtain a composite with a higher thermal conductivity. Composites based on the PCMs studied and carbon nanostructures are elaborated, and their thermal conductivity is measured. Then, an experimental system permitting to simulate the dissipation of a battery cell is build and used to evaluate the PCM alone, the PCM embedded in metal foam and the better obtained composite. Finally, to be closer to the real conditions, a model representing an entire battery stack is developed, simulations are produced and the obtained results are discussed
Pilík, Václav. "Bydlení pro seniory." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-410076.
Full textLuo, Wen-Dian, and 羅文典. "Design and Implementation of Ironless Linear Motor with Forced Air-cooling System." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/57gd5e.
Full text國立聯合大學
機械工程學系碩士班
106
There’s an increasing demand for linear platform in industry, while the system response speed and positioning accuracy requirements are also rising. The ironless linear motor has the characteristics of direct drive, so the response speed is fast. Because it does not have a cogging structure, so it has small speed ripple, and high positioning accuracy. However, due to continuous improvement of industrial technology, in addition to the requirements of the platform system more stringent, but also take into account the equipment usage and cost. So to enhance the motor thrust density is the key issue in motor design. This paper proposes an ironless linear motor with a forced air cooling at a safe operating temperature, and considers the coil winding density and the cooling efficiency of the air cooling system. Through this design method, the motor has the characteristics of high response, high precision and high thrust density. In addition to propose a design process in this paper, the electromagnetic field analysis (Ansys Maxwell), structural field analysis (Ansys Mechanical), and heat flow analysis (Fluent) are used to design an ironless linear motor with forced Air-cooling system and complete its prototype. Finally, the feasibility of the design is verified by experiment and simulation. Keywords: Ironless linear motor, thrust density, cooling system
CHEN, YUN-CHU, and 陳允柱. "A Study of Intelligent Indoor Air Quality Compound Purification System for Buildings." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/68a543.
Full text華夏科技大學
資產與物業管理系
107
In recent years, Taiwan have serious air pollution because of thermal power plants 、 The Sixth Naphtha cracking plant (Six Naphtha)、factory、 motor vehicle exhaust and Chinese smog..., which cause a decrease in air quality. Especially for the matter PM2.5 Over standard most seriously affects peoples health. Not only Taiwan facing serious problems of PM2.5 over standard, but also many major cities have the same problem all over the world. Due to the poor outdoor air quality, the indoor air quality is not good, and about 80-90% of the time per person per day is located in the indoor environment. There have been many cases in recent years because the air in the decor contains formaldehyde and cause cancer, so attention should be paid to the health effects of indoor air pollutants. How to effectively monitor, manage and improve indoor air quality is an important topic of global concern. The purpose of this study is to explore a clean system for intelligent indoor air quality and to establish a new multi-functional formaldehyde purification treatment method. According to government regulations: intelligent air quality monitoring and management system, you can instantly monitor air quality, including: carbon dioxide, carbon monoxide, formaldehyde, total volatile organic compounds, PM10, PM2.5, ozone, etc. The air quality control system is automatically activated when it is detected that the above listed items exceed the legal standards. Including: air purifier (integrated primary filter - HEPA filter - medium steel activated carbon - US RGF-inside components - negative ion generator), can be formaldehyde, total volatile organic compounds, PM10, PM2.5 and other harmful gases, Bacteria and fungi are eliminated, and started a mechanical fresh air system is also introduced to introduce outside clean air to the room to rapidly reduce the concentration of carbon dioxide, carbon monoxide, ozone, etc., to legal standards. Establishment: The new multi-functional formaldehyde purification treatment method, by using PHI technology and Bi-Polar technology to completely decompose the volatilized formaldehyde, VOCs and harmful substances. Then use the patented "chitin" coated on the surface of the pollution source (for example: decoration materials or furniture), which can capture, adsorb and react in harmful gases, and break down the formaldehyde remaining in the decoration material into water molecules to complete the formaldehyde the effect of complete governance. This study is aimed at the actual testing of air quality in commercial buildings, hospitals, activity centers, nursing homes and homes. We compare the data of intelligent air quality purification system and new multi-functional formaldehyde purification treatment method before and after started, which proves that it can effectively purify the air. At the same time, the system can be combined with intelligent management system to integrate monitoring humidity, temperature, control dehumidifier and air conditioning is used to create the best indoor air quality. Key words:Property Management, Indoor air quality, Formaldehyde, PM2.5, Intelligent Air Purification System.
Lin, Chih-Chung, and 林志忠. "Performance Analysis of Intelligent Heat Recovery and Photocatalyst Integration Air Purification System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/03494627138501321842.
Full text國立勤益科技大學
冷凍空調系
102
This study constructed a heat recovery and photocatalyst integration air purification system in a residence. Releasing some liquid volume of aromqtic or furniture detergent into the house to generate indoor VOC sources .Besides, one or two persons act in the house in order to accumulate the CO2 concentration in the house .While CO2 sensors detect the CO2 concentration in the house exceeding the recommend indoor standard value, the total heat exchanger is activated by a controller to induce outdoor fresh air and remove the indoor pollute air with a suitable flow rate. While TVOC sensors detect the VOC concentration in the house exceed the recommend standardvalue , the TiO2 photocatalyst air purification system is actived in order to degrade the indoor VOC concentration effectively .
Zeng, Yong-Siang, and 曾雍翔. "Development of Purification Simulation System for Indoor Air Quality and Effective Investigation of Using UV Treatment Formaldehyde." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/00110401192900028289.
Full text明志科技大學
環境與資源工程研究所
100
Gaseous organic pollutants in the air, the removal techniques, including: adsorption, photocatalyst and ozonation, etc., However, because of its treatment effectiveness or side effects to the environment still different hazards or disadvantages, therefore, the application is limited and can’t be universal. This study intends to adopt VUV lamps produce 253.7nm and 185nm wavelength characteristics, so that in the humid air play "O3/UV/H2O" synergistic effects, the use of hydroxyl radical to degradation formaldehyde contamination of indoor air in order to improve the poor performance at low concentrations, while high concentrations harmful to the environment such as missing in the traditional ozone oxidation. In addition, it can be reduce the high cost of materials and maintenance costs for treatment technology of adsorption and photocatalyst. Expect to be a favorable choice as an alternative for the effective removal of organic pollutants in indoor air. In this study, "purify indoor air quality simulation test box" was designed in the laboratory, test cabinets installed in the vacuum ultraviolet, using its advanced oxidation technologies of "O3/UV/H2O" synergistic effects. For different airflow velocity (0.1m/s, 0.5m/s, 1m/s), different initial concentrations of pollutants (1ppm, 5ppm, 10ppm), the number of different lamps (6, 12, 24) as well as different arrangement may Lamp (radial horizontal, perpendicular to the radial, axial) and other conditions, a series of experiments were conducted to investigate the removal or degradation of performance of formaldehyde. Preliminary research results are as follows: (1)When the energy is insufficient for purification equipment, VUV lamp for formaldehyde degradation rate α(%), degradation β(mg/m3s), unit energy consumption degradation rate η(mg/m3W) and other performance is not related with different initial concentrations of pollutants, different flow rate, lamp test parameters such as different arrangement. (2)When purification equipment capable of handling capacity, UV lamp for formaldehyde degradation rate α(%), degradation β(mg/m3s) and other performance is low-relationship with lamp different arrangement. (3)VUV lamp for formaldehyde degradation rate α(%) is negative correlation with different initial concentrations of pollutants and different air velocity, and at a certain flow velocity(0.5m/s) conditions, VUV lamp for formaldehyde degradation β(mg/m3s) is positively related to response with different flow rate. (4)At a certain flow velocity(≦0.5m/s) under the conditions, handling the initial concentration of 1ppm formaldehyde contamination, 12 VUV lamp unit energy consumption degradation rate η(mg/m3W) is better than 24 VUV lamps, and when the processing of the initial concentration of 5ppm formaldehyde contaminants, 24 VUV lamp unit energy consumption degradation rate η(mg/m3W) is better than 12 VUV lamps. (5)The air flow velocity of 1m/s under the conditions, from the views of different initial concentrations of pollutants, the number of different lamps and other lamps different arrangement, VUV lamp is almost impossible to play the formaldehyde degradation effect, shows "O3/UV/H2O" synergy promoting effect, if applied to pipe purge, it will affect the flow rate control is an important factor in the effectiveness of the degradation. Keywords:Vacuum ultraviolet light (VUV), indoor air quality, formaldehyde.
You, Geeng Shyan, and 尤耿賢. "Study on Optimization of a Thermal Swing Adsorption System in Fixed Beds for Air Purification and Solvent Recovery." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/33541198125774218925.
Full text逢甲大學
化學工程研究所
82
To emphasize the importance of the functions of thermal swing adsorption system in fixed beds on both air purification and solvent recovery, the system cyclic behavior includes not only the purification efficiency of the process air but also the enhancement ratio of the regeneration gas. For a specified adsorbate-adsorbent pair at a specified inlet temperature and concentration, the dimensionless parameters of the model affecting the system cyclic behavior include the dimensionless heat and mass transfer parameters and the dimensionless operating parameters, which are mainly functions of the transport properties and the operating conditions. In the study, the theoretical analysis was performed for a single component system to establish the relationship between the cyclic behavior and the dimensionless parameters, i.e. the so called dimensionless cyclic behavior chart in which the ordinate represents the cyclic behavior and the abscissa represents the operating cost. Each curve on the chart was formed at a specified purification efficiency and the lowest point of the curve can be taken as the optimal operating point of the system at this purification efficiency. Also, this optimal operating point was used as a criterion to select the optimal design and operating parameters in several case studies. Taking the acetone-activated carbon system as an example, the simulation results showed that the addition of a cooling step into the system can only improv1;the enhancement ratio of the regeneration gas a little and the enhancement ratio is about∼ 2.5 for the base point of the simulation , where the purification efficiency of the process air is set at 95%. The enhancement ratio of the system can be futher increased by decreasing the inlet concentration of the process air, increasing the inlet temperature of the regeneration gas, decreasing the purification efficiency of the process air, improving the mass transfer rates within the particles, and increasing the bed length.