Gotowe bibliografie tematyczne / Tube insert

Spis treści

  1. Artykuły w czasopismach
  2. Rozprawy doktorskie
  3. Książki
  4. Części książek
  5. Streszczenia konferencji
  6. Raporty organizacyjne

Gotowa bibliografia na temat „Tube insert”

Autor: Grafiati
Data publikacji: 3 czerwca 2025
Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Tube insert"

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Reid, R. S., M. B. Pate, and A. E. Bergles. "A Comparison of Augmentation Techniques During In-Tube Evaporation of R-113." Journal of Heat Transfer 113, no. 2 (1991): 451–58. http://dx.doi.org/10.1115/1.2910582.

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An experimental study was conducted to determine the potential of three techniques for augmenting in-tube evaporation of refrigerants: high-fin tubes, microfin tubes, and twisted tape inserts. Five tubes with internal fins and one smooth tube with a twisted-tape insert were tested. Additionally, experiments were performed with two reference smooth tubes having diameters similar to the maximum inside diameters of the finned tubes. All experiments involved evaporating Refrigerant 113 (R-113) by direct electrical heating of the tube wall. Local evaporation heat transfer coefficients were measured
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Zimparov, Ventsislav, Plamen Penchev, and Joshua Meyer. "Performance evaluation of tube-in-tube heat exchangers with heat transfer enhancement in the annulus." Thermal Science 10, no. 1 (2006): 45–56. http://dx.doi.org/10.2298/tsci0601045z.

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Different techniques as angled spiraling tape inserts, a round tube in side a twisted square tube and spiraled tube in side the annulus have been used to enhance heat transfer in the annulus of tube-in-tube heat exchangers. The heat transfer enhancement in the shell can be supplemented by heat transfer augmentation in tubes using twisted tape inserts or micro-finned tubes. The effect of the thermal resistance of the condensing refrigerant could also be taken into consideration. To assess the benefit of using these techniques extended performance evaluation criteria have been implemented at dif
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Borg, Ulf, Emmet Bolger, and Sean Morris. "Does Cuff Design Impact Insertion and Removal Force of Tracheostomy Tubes? A Bench Model." Military Medicine 188, Supplement_6 (2023): 629–33. http://dx.doi.org/10.1093/milmed/usad286.

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ABSTRACT Introduction Percutaneous dilatational tracheostomy is a commonly performed procedure in intensive care units. Unrecognized tracheal ring fracture has been suggested as a possible factor for tracheal stenosis. The degree of tracheal compression relates to the amount of force required to cannulate the trachea. The objective of this study was to determine the force required to insert two types of tracheostomy tubes with different cuff designs. Materials and Methods This bench model measured the insertion and removal force of two tracheostomy tubes; one with a barrel-shaped, high-volume,
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Nimish, Dubey Mr. Morrish Kumar. "DESIGN MODIFICATION IN HEAT EXCHANGER TWISTED TAPE FOR HEAT TRANSFER ENHANCEMENT- A REVIEW." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 7 (2017): 1–5. https://doi.org/10.5281/zenodo.822920.

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Heat exchangers are very much essential industrial as well as domestic equipment used every day. Overall performance of any machine and many systems as a whole depends on the performance of a heat exchanger. To improve the performance of a heat exchanger it is needed to improve the heat transfer phenomena of a tube. Number of researches has been done to develop devices or means to enhance the performance of a heat exchanger. The most successful development of a component for the most efficient enhancement of heat exchanger performance is development of twisted tape inserts for heat exchanger t
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Hossain, Mohammad Taukir, Nesar Ali, and Muhammad Sadekul Karim. "Enhancement of Heat Transfer in a Rouletted Copper Tube Employing Delta Winglet Twirled Type Insert." European Journal of Engineering Research and Science 3, no. 5 (2018): 47. http://dx.doi.org/10.24018/ejers.2018.3.5.743.

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Heat transfer is a process or a system of thermal engineering that concerns the generation, use, conversion, transfer, internal or external molecular formation and exchange of thermal energy (heat) between physical systems. The research work has been experimented for the turbulent flow heat transfer in a tube having delta winglet twisted tape and then separately with water as working fluid. The test section consisted of a circular copper tube of 26.6 mm inner diameter, 900 mm length with five K-type thermocouples. Bulk temperature and pressure drops have been measured. Material of both the del
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Hossain, Mohammad Taukir, Nesar Ali, and Muhammad Sadekul Karim. "Enhancement of Heat Transfer in a Rouletted Copper Tube Employing Delta Winglet Twirled Type Insert." European Journal of Engineering and Technology Research 3, no. 5 (2018): 47–51. http://dx.doi.org/10.24018/ejeng.2018.3.5.743.

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Heat transfer is a process or a system of thermal engineering that concerns the generation, use, conversion, transfer, internal or external molecular formation and exchange of thermal energy (heat) between physical systems. The research work has been experimented for the turbulent flow heat transfer in a tube having delta winglet twisted tape and then separately with water as working fluid. The test section consisted of a circular copper tube of 26.6 mm inner diameter, 900 mm length with five K-type thermocouples. Bulk temperature and pressure drops have been measured. Material of both the del
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B Ch, Nookaraju, Dhanuri Bharath Yadav, Kotholla Raghavendar, et al. "Experimental & numerical investigation of heat transfer using twisted tapes with rectangular cuts." E3S Web of Conferences 552 (2024): 01010. http://dx.doi.org/10.1051/e3sconf/202455201010.

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The current work focuses on using rectangular inserts with water as the working fluid to investigate heat transfer experimentally and numerically in a horizontal circular tube [10]. The study considers variations in the number of rectangular slots within the same strip. The tube has dimensions of 0.0266 m diameter. Twisted tapes, featuring rectangular cuts, are constructed from a 3 mm thick Stainless-steel strip with a length of 1035 mm. For experimentation, two different types of rectangular inserts were considered: one with nine cuts and the other with eighteen cuts. The dimensions of the cu
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Seryam, Udit, Aseem C. Tiwari, and Jeetendra Kushwaha. "Comparative Experimental Study on Effect of Copper Wire Helical Wound Steel Tube with 2.5” Full Length Insert on Performance of Double Pipe Steel Tube Heat Exchanger." International Journal for Research in Applied Science and Engineering Technology 11, no. 8 (2023): 306–19. http://dx.doi.org/10.22214/ijraset.2023.55198.

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Abstract: A comparative experimental study was conducted to explore the hydrothermal behavior of a double tube heat exchanger with copper wire helical wound steel tubes and plane steel tubes with and without twisted tap inserts of pitch length 2.5 inches. In comparison to helical tubes, corrugated tubes, and many other more compact tube type heat exchangers, straight tube heat exchangers offer advantages since the construction of the heat exchanger tubes is easier. In the current work, the fluid-to-fluid heat exchange is considered, with a flow rate ranging from 15 to 75 liters/hour. Constant
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Paneliya, Sagar, Parth Prajapati, Umang Patel, et al. "Experimental and CFD analysis on heat transfer and fluid flow characteristic of a tube equipped with variable pitch twisted tape." E3S Web of Conferences 116 (2019): 00058. http://dx.doi.org/10.1051/e3sconf/201911600058.

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In this paper, we report an experimental and Computational Fluid Dynamics (CFD) investigation on the overall heat transfer coefficient, friction factor and effectiveness of a tube equipped with classic and variable twisted tape inserts. Constant (Y = 4.0) and variable pitch twisted inserts (Y = 4-3-4) made of Stainless Steel and Aluminium were used during the experiments due to their ease in machinability. Resistance thermometers were used to measure temperature of the working fluid at the inlet and outlet of the test section. It was observed that the twisted tape in the tube imposes the turbu
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Ahmed, Md Shamim, and Mohammad Zoynal Abedin. "Review on Heat Transfer Enhancement by Insert Devices." International Journal of Engineering Materials and Manufacture 5, no. 4 (2020): 130–47. http://dx.doi.org/10.26776/ijemm.05.04.2020.03.

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The scientists revise the heat transfer enhancement techniques time to time to achieve better performance and to obtain optimized designs of heat exchangers. The present study reviews the performance and techniques of heat transfer enhancement using various insert devices such as twisted tape and wire coil insert as well as completely different forms of other inserts like air-foil shape inserts, X-shaped twisted tape inserts, baffles and V-winglets inserts with various types of medium and nanofluids. According to the summary of recent significant researches on the heat transfer enhancement by
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Rozprawy doktorskie na temat "Tube insert"

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Plánková, Tereza. "Moderní technologické prvky pro trubkové výměníky tepla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416433.

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The aim of this diploma thesis is to get acquainted with modern technological elements currently used in shell-and-tube heat exchanger in the shell-side and tube-side, thermal-hydraulic calculation of selected elements and comparison of thermal-hydraulic properties with classically used competing technological elements. The work deals mainly with EM baffle in the tube-side and tube inserts like the twisted tape type (and its modifications) and coiled wire in the tube-side. The theoretical part is focused on acquaintance with classical technological elements in shell-and-tube heat exchanger and
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Teparkum, Sirasak. "Interaction Between Insects and Apple (Malus X Domestica Borkh.): Insect Behavior, Genotypic Preference, and Plant Phenolics With Emphasis on Japanese Beetle (Popillia Japonica Newman)." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/27920.

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Leaves and fruit of nine apple (Malus x domestica Borkh.) genotypes were evaluated for insect injury in 1998 and 1999. Foliar and fruit injury from 12 insect species was inconsistently affected by genotype. Spraying trees with oil affected neither fruit insect injury nor fruit phytotoxicity. In choice feeding assays, incidence of Japanese beetle (JB) feeding and leaf area consumed was greater for 'Liberty' than for 'York.' Genotypes did not differ in no-choice feeding assays. Choice and no-choice feeding assays between apple and oak indicated that JB could distinguish host plants in an artif
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Webster, Matthew R. "Material Characterization of Insect Tracheal Tubes." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/71708.

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The insect respiratory system serves as a model for both robust microfluidic transport and mate- rial design. In the system, the convective flow of gas is driven through local deformations of the tracheal network, a phenomenon that is dependent on the unique structure and material properties of the tracheal tissue. To understand the underlying mechanics of this method of gas transport, we studied the microstructure and material properties of the primary thoracic tracheal tubes of the American cockroach (Periplaneta americana). We performed quasi-static uniaxial tests on the tissue which reveal
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Wills, Amanda Jane. "Mitigation of biofouling using tube inserts in conjunction with biocides." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396232.

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Flint, H. M., and J. R. Merkle. "Pink Bollworm Field Testing New Polyethylene Tube Dispenser for Gossyplure." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/204082.

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Cox, Lewis Michael. "Patterns of Hemolymph Pressure Related to Tracheal Tube Collapse in the Beetle Pterostichus commutabulis." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/42719.

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Rhythmic collapse and reinflation of tracheal tubes is a form of active ventilation that augments convective gas exchange in multiple orders of insects. The underlying mechanism driving this phenomenon is not known. Among other things, tracheal tube collapse could be caused by either direct impingement of trachea or by a difference of pressure gradients between the intra-tracheal air and the surrounding hemolymph. To determine the relationship between hemolymph pressure and tracheal tube collapse in the ground beetle (Pterostichus commutabulis), we performed direct measurements of hemolymph pr
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Mogaji, Taye Stephen. "Theoretical and experimental study on convective boiling inside tubes containing twisted-tape inserts." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-21102014-103453/.

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This research comprises an experimental and theoretical study on convective boiling inside tubes containing twisted-tape inserts. The demand for more compact and efficient thermal systems, in which the heat exchangers plays an important role, has led to the development and use of various heat transfer enhancement techniques. Among them twisted-tape insert as a swirl flow device is one of the most used. Twisted-tape inserts have been used for over more than one century ago as a technique of heat transfer enhancement applied to heat exchangers. However, the heat transfer augmentation comes toget
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Oni, Taiwo Oluwasesan. "Numerical investigation of heat transfer and fluid flow in tubes induced with twisted tape inserts." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6237/.

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Heat energy is important to all aspects of life. Various industries including food processing plants, chemical processing plants, thermal power plants, refrigeration and air conditioning equipments, petrochemical plants, etc. are faced with the problems of effective utilization, conservation and recovery of heat. The production of heat exchangers involves huge investments for capital and operation costs. In view of this, it has become important to design heat exchangers that will be efficient and also save energy, cost and materials. Different techniques known as heat transfer enhancement are
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Stephen, Susan. "mRNA, microtubules and motor proteins : investigations into mRNA translocation along nutritive tubes of an hemipteran insect." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312416.

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You, Lishan. "Computational Modeling of Laminar Swirl Flows and Heat Transfer in Circular Tubes with Twisted-Tape Inserts." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1029525889.

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Książki na temat "Tube insert"

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Wills, Amanda Jane. Mitigation of biofouling using tube inserts in conjunction with biocides. University of Birmingham, 1998.

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S, Pillai K. Post harvest insect pest management of tropical tuber crops. Central Tuber Crops Research Institute, 1997.

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Adam, Sheila, Sue Osborne, and John Welch. Gastrointestinal problems and nutrition. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199696260.003.0009.

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The chapter includes the background gastrointestinal (GI) physiology and pathophysiology commonly seen in critical care, including the immune functions of the gut. Acute gastrointestinal bleeding, the acute abdomen, liver failure and dysfunction, liver support systems and transplantation, and the management of acute pancreatitis are covered. Physical examination techniques, diagnostic information, and history are reviewed. The rationale for the importance of nutritional support in critical care, the techniques and complications of enteral feeding tube placement , the types of parenteral intrav
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Doodle Art Bugs 'N' Birds: Color Your Own Poster, Poster and 12 Doddle Markers (Doodle Art 25th Anniversary Tubes Series). 2nd ed. Price Stern Sloan, 1996.

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Rinaldi, Simon. Congenital neurological disorders. Edited by Patrick Davey and David Sprigings. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199568741.003.0225.

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This chapter covers four congenital neurological disorders which may be encountered in adult medicine: cerebral palsy, Chiari malformations, spina bifida, and tethered cord syndromes. Cerebral palsy is a disturbance of motor function arising from damage to the developing fetal or infant brain. It usually refers to a disorder resulting from a non-progressive insult which occurred at less than 3 years of age. Chiari malformations are congenital abnormalities of the anatomy and structural relationships of the cerebellum, the brainstem, and the foramen magnum. Dysraphism is a failure of opposition
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Meyer, Mark J., and Norbert J. Weidner. Do-Not-Resuscitate Orders in the OR. Oxford University Press, 2013. http://dx.doi.org/10.1093/med/9780199764495.003.0006.

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A physician signs a do-not-resuscitate order (DNR) when aggressive resuscitation measures will not benefit the patient in the presence of a life-threatening illness. Many children living with a life-threatening illness derive benefit from invasive diagnostic and therapeutic procedures such as tracheostomies, peripherally inserted central lines, gastrostomy tubes, and tumor debulking procedures. These procedures are considered palliative rather than curative in that they improve or preserve quality of life but do not prevent progression of the underlying condition. In children, the presence of
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Kirchman, David L. Symbioses and microbes. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198789406.003.0014.

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The book ends with a chapter devoted to discussing interactions between microbes and higher plants and animals. Symbiosis is sometimes used to describe all interactions, even negative ones, between organisms in persistent, close contact. This chapter focuses on interactions that benefit both partners (mutualism), or one partner while being neutral to the other (commensalism). Microbes are essential to the health and ecology of vertebrates, including Homo sapiens. Microbial cells outnumber human cells on our bodies, aiding in digestion and warding off pathogens. In consortia similar to the anae
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Części książek na temat "Tube insert"

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Chakraborty, Oveepsa, Biplab Das, and Rajat Gupta. "Impact of Helical Coil Insert in the Absorber Tube of Parabolic Trough Collector." In Modeling, Simulation and Optimization. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9829-6_14.

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Vengadesan, Elumalai, and Ramalingam Senthil. "Effect of Perforated Tube Insert on Thermal Behavior of Flat-Plate Solar Water Collector." In Recent Advances in Energy Technologies. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3467-4_4.

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Kumar, Gulshan, Jayanti Prabha Bharti, Gulshan Kumar, and Nimai Pada Mandal. "Numerical Analysis of Heat Transfer Enhancement with Twisted Tape Insert in Tube Flow Using Nanofluid." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-7759-4_49.

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Periyasamy, R., and S. Santhia. "Experimental Comparative Analysis of Heat Transfer Enhancement in Shell and Coiled Tube Heat Exchanger with Winged Insert and Annular Fin." In Advances in Manufacturing, Automation, Design and Energy Technologies. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1288-9_77.

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Yuan, Xin’an, Wei Li, Jianming Zhao, Xiaokang Yin, Xiao Li, and Jianchao Zhao. "Inspection of Both Inner and Outer Cracks in Aluminum Tubes Using Double Frequency Circumferential Current Field Testing Method." In Recent Development of Alternating Current Field Measurement Combine with New Technology. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4224-0_4.

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AbstractAluminum and alloy tubes are widely used in industrial fields because of the advantage of good corrosion resistance, high thermal conductivity and light weight. Due to the stress corrosion cracking (SCC) and fatigue corrosion cracking (FCC), both inner and outer cracks generates in the aluminum tube. It is still a challenge to inspect all inner and outer surface cracks in the thick-wall aluminum tube in real time by one scan using the nondestructive testing (NDT) method. A double frequency circumferential current field testing (CCFT) method is presented for the inspection of both inner
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Paneliya, Sagar, Sakshum Khanna, Jeet Mehta, et al. "An Experimental and CFD Analysis on Heat Transfer and Fluid Flow Characteristics of a Tube Equipped with X-Shaped Tape Insert in a U-Shaped Heat Exchanger." In Proceedings of the 7th International Conference on Advances in Energy Research. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5955-6_127.

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Reddy, K. Poli, B. Sreenivasa Reddy, G. S. Guru Dattatreya, K. Krishna Reddy, R. Meenakshi Reddy, and G. Venkatesh. "CFD Investigation on Horizontal Tube with Different Inserts." In Advances in Engineering Research. Atlantis Press International BV, 2025. https://doi.org/10.2991/978-94-6463-662-8_52.

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Kumar, Ravi, Anil Kumar Patil, and Manoj Kumar. "Thermal Performance of Multiple Tube Sensible Energy Storage with Coil Inserts." In Green Energy and Technology. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2279-6_6.

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Samal, Ipsita, Tanmaya Kumar Bhoi, Deepak Kumar Mahanta, and Amit Umesh Paschapur. "Biology and management strategies of major insect-pests of root and tuber crops." In Sustainable Production of Root and Tuber Crops. Routledge, 2025. https://doi.org/10.4324/9781003487159-25.

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Kazakov, Kirill E. "Contact Problem for Coated Viscoelastic Tube and Rigid Inserts with Complex Profiles." In Solid Mechanics, Theory of Elasticity and Creep. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-18564-9_13.

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Streszczenia konferencji na temat "Tube insert"

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Chen, Yong, Upekha Yapa, Andrew Price, and Viresh Wickramasinghe. "Evaluation of Aircrew Whole-Body Vibration and Mitigation Solutions for Helicopter Flight Engineers." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12041.

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Flight testing has been performed on a Bell-205 helicopter to investigate aircrew whole-body vibration (WBV) exposure levels on a rag and tube Flight Engineer (FE) seat in accordance with ISO2631 and MIL-STD1472 standards. Results show that the helicopter cabin vibration is dominated by the N/rev harmonics of the two-bladed main rotor speed. The aircrew WBV levels vary significantly depending on the flight conditions; the highest WBV levels occur at high speed level flight conditions. With reference to the ISO2631 and MIL-STD-1472 guidelines, the aircrew WBV exposure level on the standard FE s
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Eden, D. A., and B. Breene. "On-Line Electrochemical Corrosion Monitoring in Fireside Applications." In CORROSION 2003. NACE International, 2003. https://doi.org/10.5006/c2003-03361.

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Abstract Electrochemical corrosion monitoring has been used to evaluate fireside corrosion of coal fired boilers materials under low NOX operations. The reducing environments which are prevalent under these firing conditions can lead to the deposition/formation of non-protective iron sulfide films on the boiler tubes, resulting in excessive corrosion attack. In order to mitigate the boiler tube corrosion problems, it is common practice to weld overlay the boiler tubes with alloy C276. Corrosion of typical boiler tube material and C276 has been monitored electrochemically using a combination of
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Limpert, G. J. C., and J. L. Raber. "Tests of Non-Chemical Scale Control Devices in a Once-Through System." In CORROSION 1985. NACE International, 1985. https://doi.org/10.5006/c1985-85250.

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Abstract The writers conducted experiments in a test heat exchanger system to evaluate ten non-chemical scale and corrosion control devices. These devices are claimed to perform either by electrostatic, magnetic, electronic or catalytic mechanisms. Tests were also performed using chemicals to compare the results with non-chemical systems and to insure that the test conditions were not so severe that scale prevention was impossible. Water from a single deep well was used in all the tests. This water was known to cause calcium carbonate scale when heated. The test heat exchanger was a 2-tube she
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Ghafri, Mohamed, Nasser Behlani, Saleh Omairy, Aulaqi Muatasam, and Mahmoud Nasif. "Corrosion Monitoring of Complex Heat Recovery Steam Generation Boilers." In CORROSION 2020. NACE International, 2020. https://doi.org/10.5006/c2020-15116.

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Abstract The thermal Enhanced Oil Recovery (EOR) steam generation project in Petroleum Development Oman (PDO) is considered to be the first project in the Gulf region. This is a large-scale project that affects an entire country’s economic position. EOR through Heat recovery steam generation (HRSG) has been applied since 2012 in order to inject 11,000 to 13,000 steam-ton/day to produce around 135,000bbl net oil. This type of boilers consists of complex coil tubes varying from 2” to 4” inch diameters, and length >11 km within 25m2 boxes. Repetitive failures were reported over the past 3-
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Chaurasia, Shashank Ranjan, and R. M. Sarviya. "Thermal-Hydraulic Performance Analysis of Fluid Flow in Tube With Helical Screw Inserts in Transition Flow." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16649.

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Abstract An experimental analysis is arranged to evaluate thermal hydraulic performance analysis on fluid flow in helical screw inserts in tube with number of strips and different twist ratios in Transition flow regime. Single strip insert is also compared with double strip inserts of helical screw inserts with three values of twist ratios. Heat transfer enhancement is achieved with fluid flow in double strip as compared to single strip helical screw insert at decreases values of twist ratios and increases values of Reynolds number (Re). Maximum enhancement in the value of Nusselt number is ac
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Hata, Koichi, Yasuyuki Shirai, and Suguru Masuzaki. "Transient Critical Heat Fluxes of Subcooled Water Flow Boiling in a Short SUS304-Tube With Twisted-Tape Insert." In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-54212.

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The transient critical heat fluxes (transient CHFs) in a short SUS304-tube with twisted-tape insert are systematically measured for mass velocities (G = 3997.79 to 13419.8 kg/m2s), inlet liquid temperatures (Tin = 293.55 to 300.85 K), outlet pressures (Pout = 825.19 to 860.95 kPa) and exponentially increasing heat inputs (Q = Q0exp(t/τ), τ = 26.85 ms to 8.42 s) by the experimental water loop comprised of a multistage canned-type circulation pump controlled by an inverter. The SUS304 test tube of inner diameter (d = 6 mm), heated length (L = 59.4 mm), effective length (Leff = 49.4 mm), L/d (= 9
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Bouhairie, Salem. "Analysis of Swirl Flow by Tube Inserts for CFD Study." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52820.

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The petroleum and petrochemical industries continually seek mechanical methods to improve heat transfer in shell-and-tube heat exchangers. Tube bundle inserts are popular mechanical devices that help improve performance. The increase in the tubeside heat transfer coefficient by the insert allows for a decrease in required shellside flow length, assuming single tube pass. The flow length reduction allows for designing higher velocities and subsequent shellside shear rates, to help reduce crude oil fouling potential. This work presents some of HTRI’s ongoing experimental measurements and prelimi
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Mwesigye, Aggrey, Tunde Bello-Ochende, and Josua P. Meyer. "Thermal Performance of a Parabolic Trough Receiver With Perforated Conical Inserts for Heat Transfer Enhancement." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39849.

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Heat transfer enhancement in receivers of parabolic trough collectors offers several benefits including reduction in absorber tube circumferential temperature differences, reduced emissivity of the absorber tube selective coating, thus improved thermal and thermodynamic performance of the receiver. In this work, heat transfer enhancement in a parabolic trough receiver using perforated conical inserts was numerically investigated. The analysis was carried out for dimensionless insert’s cone angles in the range 0.40–0.90, dimensionless insert spacing in the range 0.06–0.18 and dimensionless inse
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Hata, Koichi, and Suguru Masuzaki. "Heat Transfer and Critical Heat Flux of Subcooled Water Flow Boiling in a SUS304-Tube With Twisted-Tape Insert." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22225.

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The subcooled boiling heat transfer (HT) and the steady-state critical heat fluxes (CHFs) in a short SUS304-tube with twisted-tape insert are systematically measured for mass velocities (G = 4016 to 13950 kg/m2s), inlet liquid temperatures (Tin = 285.82 to 363.96 K), outlet pressures (Pout = 764.76 to 889.02 kPa) and exponentially increasing heat input (Q = Q0 exp(t/τ), τ = 8.5 s) by the experimental water loop comprised of a multistage canned-type circulation pump controlled by an inverter. The SUS304 test tube of inner diameter (d = 6 mm), heated length (L = 59.5 mm), effective length (Leff
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Doerffer, S. S., D. C. Groeneveld, K. F. Rudzinski, I. L. Pioro, and J. W. Martin. "Some Aspects of Critical-Heat-Flux Enhancement in Tubes." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1518.

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Abstract This paper summarizes the effects of various types or numbers of critical-heat-flux (CHF)-enhancing inserts in tubular geometries. The impact of inserts on CHF is frequently expressed by an enhancement ratio K: the ratio of CHF with an insert to the CHF in a bare tube for the same local flow conditions. The impact on K of the following parameters was investigated: (i) fluid type (Freon-134a, water), (ii) axial spacing between inserts, (iii) shape of the insert, (iv) flow blockage of the insert, (v) number of similar/dissimilar insert planes upstream, and (vi) impact of flow conditions
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Raporty organizacyjne na temat "Tube insert"

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Steffens, John, Eithan Harel, and Alfred Mayer. Coding, Expression, Targeting, Import and Processing of Distinct Polyphenoloxidases in Tissues of Higher Plants. United States Department of Agriculture, 1994. http://dx.doi.org/10.32747/1994.7613008.bard.

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Polyphenol oxidase (PPO) catalyzes the oxidation of phenols to quinones at the expense of O2. PPOs are ubiquitous in higer plants, and their role in oxidative browning of plant tissues causes large annual losses to food production. Despite the importance of PPOs to agriculture, the function(s) of PPOs in higher plants are not understood. Among other roles, PPOs have been proposed to participate in aspects of chloroplast metabolism, based on their occurrence in plastids and high Km for O2. Due to the ability of PPO to catalyze formation of highly reactive quinones, PPOs have also been proposed
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Chamovitz, A. Daniel, and Georg Jander. Genetic and biochemical analysis of glucosinolate breakdown: The effects of indole-3-carbinol on plant physiology and development. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7597917.bard.

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Genetic and biochemical analysis of glucosinolate breakdown: The effects of indole-3-carbinol on plant physiology and development Glucosinolates are a class of defense-related secondary metabolites found in all crucifers, including important oilseed and vegetable crops in the Brassica genus and the well-studied model plant Arabidopsis thaliana. Upon tissue damage, such as that provided by insect feeding, glucosinolates are subjected to catalysis and spontaneous degradation to form a variety of breakdown products. These breakdown products typically have a deterrent effect on generalist herbivor
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Sadot, Einat, Christopher Staiger, and Zvi Kam Weizmann. functional genomic screen for new plant cytoskeletal proteins and the determination of their role in actin mediated functions and guard cells regulation. United States Department of Agriculture, 2003. http://dx.doi.org/10.32747/2003.7587725.bard.

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The original objectives of the approved proposal were: 1. To construct a YFP fused Arabidopsis cDNA library in a mammalian expression vector. 2. To infect the library into a host fibroblast cell line and to screen for new cytoskeletal associated proteins using an automated microscope. 3. Isolate the new genes. 4. Characterize their role in plants. The project was approved as a feasibility study to allow proof of concept that would entail building the YFP library and picking up a couple of positive clones using the fluorescent screen. We report here on the construction of the YFP library, the d
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Delwiche, Michael, Boaz Zion, Robert BonDurant, Judith Rishpon, Ephraim Maltz, and Miriam Rosenberg. Biosensors for On-Line Measurement of Reproductive Hormones and Milk Proteins to Improve Dairy Herd Management. United States Department of Agriculture, 2001. http://dx.doi.org/10.32747/2001.7573998.bard.

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The original objectives of this research project were to: (1) develop immunoassays, photometric sensors, and electrochemical sensors for real-time measurement of progesterone and estradiol in milk, (2) develop biosensors for measurement of caseins in milk, and (3) integrate and adapt these sensor technologies to create an automated electronic sensing system for operation in dairy parlors during milking. The overall direction of research was not changed, although the work was expanded to include other milk components such as urea and lactose. A second generation biosensor for on-line measuremen
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