دانلود رایگان مقاله لاتین تحلیل تنش غشاء بیوراکتور از سایت الزویر
عنوان فارسی مقاله:
تجزیه و تحلیل تنش غشاء بیوراکتورها و مخازن تاشو
عنوان انگلیسی مقاله:
Membrane stress analysis of collapsible tanks and bioreactors
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Collapsible tanks or vessels are vessels made from materials that are flexible, easily deformable, and light.Without a rigid supporting system collapsible tanks normally take the shape of a pillow when filled with fluid, so they are also called pillow or bladder tanks. Collapsible tanks are used as water storage vessels, fuel storage vessels, transportation vessels, sewage tanks, food storage vessels, chemical storage vessels, bioreactors for e.g. ethanol [1] or biogas production [2] etc. The benefits of using collapsible tanks over rigid tanks include processflexibility, ease oftransportation, installation, portability and low cost. Collapsible tanks come in sizes suitable for use at small, medium [3] and large scale. Collapsible tanks are usually designed with their end use in view. One common question when using these collapsible tanks especially at larger scale is if the materials used for constructing them can tolerate the stress caused by the high pressure and the large liquid volume. Despite their wide application,there isno scientific publicationonhow to calculate the stress in these containers to safeguard against failure.When collapsible tanks are used for storing or processing fluids, they can be designed as pressure vessels. A pressure vessel is a vessel that can withstand the internal pressure that is acting on it [4]. According to its wall thickness, pressure vessels can be classified as thick or thin walled. A pressure vessel is thin walled if the ratio of its wall thickness to its radius is less than or equal to 1/20 [4] . Thin walled vessels offer no resistance to bending, so the stress on it is distributed through its thickness, resulting in only membrane stresses, while thick walled vessels offer resistance to bending, so they have both membrane stresses and bending stresses [4]. Thus, collapsible tanks are thin-walled pressure vessels. Thin shelltheory is normally used for calculating the stress in thin walled pressure vessels under constant internal pressure [4]. Using the thin shell theory in calculating the membrane stress in collapsible tanks would not give accurate values. Some reasons for this are; collapsible tanks will not have the same pressure at all points, and they will not have a specific shape at all times because their shape will change with changes in pressure and the volume of fluid in them [5]. Accurate determination of the stresses in any pressure vessel is essential to safeguard against failure [6] which could occur when the membrane stress in the vessel has exceeded the material’s intrinsic tolerance values as determined by its Young’s modulus [7]. One challenge why the thin shell theory cannot be used to calculate the stress that would act on collapsible tank is that their
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کلمات کلیدی:
Osagie A. Osadolor - Google Scholar Citations https://scholar.google.com/citations?user=0aLIOqcAAAAJ&hl=en Introducing Textiles as Material of Construction of Ethanol Bioreactors. PRLMJT Osagie A. ... Membrane stress analysis of collapsible tanks and bioreactors. L.S.A., List of C.F.R. Sections Affected - Page 175 - Google Books Result https://books.google.com/books?id=9y-HAAAAMAAJ 2004 - Administrative law 2.0 Summary of Method 2.1 A self-contained benchtop bioreactor system is ... exiting the benchtop bioreactor are analyzed to determine the biodegradation rates of ... bioreactor in a collapsible low-density polyethylene container or collapsible ... Code of Federal Regulations: 2000- - Page 447 - Google Books Result https://books.google.com/books?id=n1N_QxCYef4C 2010 - Administrative law 2.0 Summary of Method 2.1 A self-contained benchtop bioreactor System is ... the benchtop bioreactor are analyzed to determine the biodegradation rates of the ... bioreactor in a collapsible low-density polyethylene Container or collapsible ... The Code of Federal Regulations of the United States of America https://books.google.com/books?id=fwY7AAAAIAAJ 2004 - Administrative law 2.0 Summary of Method 2.1 A self-contained benchtop bioreactor system is ... exiting the benchtop bioreactor are analyzed to determine the biodegradation rates of ... bioreactor in a collapsible low-density polyethylene container or collapsible ... Two new disposable bioreactors for plant cell culture: The wave and ... onlinelibrary.wiley.com/doi/10.1002/bit.21187/abstract by B Terrier - 2007 - Cited by 77 - Related articles Sep 27, 2006 - Abstract. The present article describes two novel flexible plastic-based disposable bioreactors. The first one, the WU bioreactor, is based on the ...
