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Air Mover

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David Mills – One of the best experts on this subject based on the ideXlab platform.

  • Air-Only Relationships
    Pneumatic Conveying Design Guide, 2015
    Co-Authors: David Mills

    Abstract:

    Air supply and exhaust or venting pipelines can be of a considerable length with some systems, whether for positive pressure or vacuum systems, particularly if the Air Mover or the filtration plant is remote from the conveying system. In such cases, the evaluation of the Air only pressure drop values in these pipeline sections is important, for they could represent a large proportion of the available pressure drop if they are not sized correctly. Airflow control is also important, particularly if plant Air is used for a conveying system, or if the Air supply to a system needs to be proportioned between that delivered to a blow tank and that directed to the pipeline. In addition, the pressure drop in the empty pipeline is a major consideration in the design of a pneumatic conveying system. If a positive displacement blower is used in combination with a long distance, small bore pipeline, for the suspension flow of a material, it is quite possible that the entire pressure drop would be utilized in blowing the Air through the pipeline and that no material would be conveyed. The pressure drop for Air only in a pipeline is significantly influenced by the Air velocity that is required for the conveying of the material.

  • Chapter 15 – Design procedures
    Pneumatic Conveying Design Guide, 2004
    Co-Authors: David Mills

    Abstract:

    Publisher Summary
    A pneumatic conveying system is designed using mathematical models, available test data, or a combination of the two. If mathematical models are to be used, some degree of confidence needs to be established as to their suitability for a particular application, such as conveying a particular material under closely defined conditions, before they are employed. Test data is used extensively in system design. However, it is essential that the available data relates to the same grade of material for which the new plant design is required. It is also essential that the data is available to slightly higher values of solids loading ratio and to slightly lower values of conveying line inlet Air velocity, than are contemplated for the new design. Further, the chapter discusses a logic diagram for the design of a pneumatic conveying system based on the use of mathematical models. The final requirement in the design process is to specify the pipeline bore required and the necessary rating of the Air Mover.

  • Chapter 6 – Air Movers
    Pneumatic Conveying Design Guide, 2004
    Co-Authors: David Mills

    Abstract:

    Publisher Summary
    The Air Mover is at the heart of the pneumatic conveying system, and the success of the entire system rests on correctly specifying the duty of the Air Mover. The specification is in terms of the volumetric flow rate of free Air required, and the pressure at which it must be delivered. The values of these two parameters are primarily dependent upon the material to be conveyed, its flow rate, and the conveying distance. Not all Air Movers are ideally suited to pneumatic conveying, and therefore, the operating characteristics should be understood and interpreted. Plant Air is available but it may not be economical to use it for pneumatic conveying. Some Air Movers have limitations, and some are more suited as exhausters than compressors. Therefore, the correct choice must be made for vacuum and positive pressure duties. Also, there are many peripheral issues associated with the supply of Air for pneumatic conveying systems that are required to be considered in addition to the basic hardware. Power requirements for pneumatic conveying is very high, particularly if it is required to convey a material at a high flow rate over a long distance, and so a first order approximation is presented to allow reasonably reliable estimates to be made early in the selection process.

Murray, Jaeli Meiying – One of the best experts on this subject based on the ideXlab platform.

  • An Innovative Take on Filtering Carbon Dioxide Through CryoCapture
    eScholarship University of California, 2020
    Co-Authors: Abdelwahab Mohamed, Ohne James, Choi, Nicholas M, Couvrette Justi, Davis Justi, Esmenjaud Kobi, Fahmy Daniel, Hernandez Mario, Laxamana Jacob, Murray, Jaeli Meiying

    Abstract:

    Overview (Air Mover):
    Carbon dioxide plays an important role in the earth’s ecosystem; the lives of many organisms are based on the balancing of this gas. Plants and animals need it for survival however, an excess of carbon dioxide can also end the organism’s life. The production of the gas mostly comes from the combustion of fossil fuel, power plants, big industries, vehicles, and processes involving natural gasses. One of the most known issues of carbon dioxide pollution is global warming. The greenhouse gas essentially traps heat in the atmosphere, increasing the global temperature.
    The methodology provided is an innovative solution towards the creation of an environmentally friendly carbon dioxide filter. Current Air filtration systems are restricted to industrial environments limiting the ability to filter the Air. Due to the large noise and low range of operation of axial fans the filtration systems need controlled environments for longevity. The paper presents a versatile Air Mover that can be mounted onto multiple surfaces due to its low profile and bracket mounts. Furthermore, the usage of a diagonal fan inside of a PVC pipe allows for a durable system that can operate at high efficiency and low noise.
    The main challenge in designing the Air Mover was figuring out how to quantify the scalability of the device and what parameters could be changed in order to make the device more viable. The designs most prominent feature are the inclusion of a modular enclosure that can be adapted to multiple areas and environments while withstanding harsh conditions due to the PVC piping that can be coated with a diagonal fan for high volumetric flow rates and pressure differential for versatility in environments the device is placed in as well as efficiency.
    Overview (Carbon Storer):
    The Civil and Environmental Engineering team is responsible for finding a cost effective and sustainable way to transport, store and recycle the carbon caught in the Air from the Carbon Catcher designed by the other engineering teams. In the team’s design, the Carbon Catcher will reduce the harmful emissions in the Air by capturing CO2, store it and then utilize it in another industry which will reduce the need to mine for more raw materials which would thus further reduce the pollution emitted into the environment.
    Our plan is to recycle the carbon emitted from a factory and utilize it in CO2 dry ice. It’s the Civil and Environmental Engineers’ job to find a way to connect a sustainable solution with a solution that improves the public’s quality of life. There are many industries that pollute immense amounts from the mining of raw material or the emission of pollutants. The team wants to show industries that the economic solution can also be the sustainable solution.
    Overview (Membrane)
    The team’s solution focuses on the use of cryogenic carbon capture, a method in which the selective freezing points of the gaseous components of Air are used to separate out carbon dioxide. For this process, the team will be utilizing a 4 step filtration process. First, the flue gas will be run through a particulate filter to catch all macroscopic particles that may be present within the Air. Afterwards, the gas is then passed through a dehumidifier where a majority of water content will be extracted. Following this, The gas was then run through a long pipe and progressively cool it down to the freezing point of carbon dioxide. Finally, the filtered gas is extracted, and a bubbler is used to separate the solid carbon dioxide. The carbon dioxide is then compressed and recycled around the feed pipe to help in the cooling process.
    Along the process of this design, the team encountered problems finding the optimum materials for temperatures this low. As well, coming up with a way to eliminate heat transfer from the outside posed a huge problem. Through the experience, the team was able to gain a greater view of what benefits and drawbacks must be balanced, along with the economic interest that comes with designing an efficient process.
    Unlike how most designs are focused, It was understood that using a membrane only provided so much creativity when it came to filtration. As a result, the team researched other successful methods and arrived at utilizing cryogenics to filter.
    Goal
    Research to provide a single solution to remove levels of carbon dioxide in the immediate atmosphere, transport it to a storage mechanism, and find a way to recycle it. Powerful research is required to ensure effective methodologies, material usage, and flexible scalability of the overall device. This particular team seeks to find an alternative separation process to membrane filtration, the efficacy of which has not been demonstrated beyond the scale of a laboratory

Jaelin Meiying Murray – One of the best experts on this subject based on the ideXlab platform.

  • An Innovative Take on Filtering Carbon Dioxide Through Cryopacture
    , 2020
    Co-Authors: Mohamed Abdelwahab, James Bohne, Nicholas M Choi, Justin Couvrette, Justin Davis, Kobi Esmenjaud, Daniel Fahmy, Mario Hernandez, Jacob Laxamana, Jaelin Meiying Murray

    Abstract:

    Author(s): Abdelwahab, Mohamed; Bohne, James; Choi, Nicholas M; Couvrette, Justin; Davis, Justin; Esmenjaud, Kobi; Fahmy, Daniel; Hernandez, Mario; Laxamana, Jacob; Murray, Jaelin Meiying; Orozco, Jacob; Rasmussen, Jacob; Singleton, Taajza; Symon, Jake T; Zhang, Scarlett Shiling | Editor(s): Khalil, Myriam | Abstract: Overview (Air Mover): Carbon dioxide plays an important role in the earth’s ecosystem; the lives of many organisms are based on the balancing of this gas. Plants and animals need it for survival however, an excess of carbon dioxide can also end the organism’s life. The production of the gas mostly comes from the combustion of fossil fuel, power plants, big industries, vehicles, and processes involving natural gasses. One of the most known issues of carbon dioxide pollution is global warming. The greenhouse gas essentially traps heat in the atmosphere, increasing the global temperature. The methodology provided is an innovative solution towards the creation of an environmentally friendly carbon dioxide filter. Current Air filtration systems are restricted to industrial environments limiting the ability to filter the Air. Due to the large noise and low range of operation of axial fans the filtration systems need controlled environments for longevity. The paper presents a versatile Air Mover that can be mounted onto multiple surfaces due to its low profile and bracket mounts. Furthermore, the usage of a diagonal fan inside of a PVC pipe allows for a durable system that can operate at high efficiency and low noise. The main challenge in designing the Air Mover was figuring out how to quantify the scalability of the device and what parameters could be changed in order to make the device more viable. The designs most prominent feature are the inclusion of a modular enclosure that can be adapted to multiple areas and environments while withstanding harsh conditions due to the PVC piping that can be coated with a diagonal fan for high volumetric flow rates and pressure differential for versatility in environments the device is placed in as well as efficiency. Overview (Carbon Storer): The Civil and Environmental Engineering team is responsible for finding a cost effective and sustainable way to transport, store and recycle the carbon caught in the Air from the Carbon Catcher designed by the other engineering teams. In the team’s design, the Carbon Catcher will reduce the harmful emissions in the Air by capturing CO2, store it and then utilize it in another industry which will reduce the need to mine for more raw materials which would thus further reduce the pollution emitted into the environment. Our plan is to recycle the carbon emitted from a factory and utilize it in CO2 dry ice. It’s the Civil and Environmental Engineers’ job to find a way to connect a sustainable solution with a solution that improves the public’s quality of life. There are many industries that pollute immense amounts from the mining of raw material or the emission of pollutants. The team wants to show industries that the economic solution can also be the sustainable solution. Overview (Membrane) The team’s solution focuses on the use of cryogenic carbon capture, a method in which the selective freezing points of the gaseous components of Air are used to separate out carbon dioxide. For this process, the team will be utilizing a 4 step filtration process. First, the flue gas will be run through a particulate filter to catch all macroscopic particles that may be present within the Air. Afterwards, the gas is then passed through a dehumidifier where a majority of water content will be extracted. Following this, The gas was then run through a long pipe and progressively cool it down to the freezing point of carbon dioxide. Finally, the filtered gas is extracted, and a bubbler is used to separate the solid carbon dioxide. The carbon dioxide is then compressed and recycled around the feed pipe to help in the cooling process. Along the process of this design, the team encountered problems finding the optimum materials for temperatures this low. As well, coming up with a way to eliminate heat transfer from the outside posed a huge problem. Through the experience, the team was able to gain a greater view of what benefits and drawbacks must be balanced, along with the economic interest that comes with designing an efficient process. Unlike how most designs are focused, It was understood that using a membrane only provided so much creativity when it came to filtration. As a result, the team researched other successful methods and arrived at utilizing cryogenics to filter. Goal Research to provide a single solution to remove levels of carbon dioxide in the immediate atmosphere, transport it to a storage mechanism, and find a way to recycle it. Powerful research is required to ensure effective methodologies, material usage, and flexible scalability of the overall device. This particular team seeks to find an alternative separation process to membrane filtration, the efficacy of which has not been demonstrated beyond the scale of a laboratory.