Relevant bibliographies by topics / Cooling pipes

Academic literature on the topic 'Cooling pipes'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Cooling pipes"

1

Lian, Wenlei, Jinhua Zhang, and Hao Wan. "Numerical research on the cooling performance of an aircraft electromechanical actuator based on heat pipes-fuel and heat pipes-ram air cooling conception." Advances in Mechanical Engineering 14, no. 5 (May 2022): 168781322210969. http://dx.doi.org/10.1177/16878132221096965.

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Numerical research is carried out on the cooling performance of an aircraft electromechanical actuator (EMA) using heat pipes. The theoretical model is established to describe the heat transfer processes in the EMA, which is validated by comparing the numerical and experimental results. The heat transfer characteristics of the EMA using two different cooling methods, heat pipes-fuel and heat pipes-ram air, are studied by numerical simulation. For the heat pipes-fuel cooling method, impact of the coolant flow velocity (0–0.015 m/s) on the cooling performance of the EMA is studied, based on which fins are designed on the condenser of heat pipes to improve the cooling performance. The results show that it is an efficient way to cool the electromechanical actuator with heat pipes-fuel cooling method and the heat dissipation rate of the EMA can be improved by 28.8% by using fins. In addition, the heat pipes-ram air cooling method could cool the EMA efficiently with the ram air temperature properly controlled.
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Hagarová, Mária, Jana Cervová, and Marek Vojtko. "Corrosion Degradation of Steel Pipes in Indirect Cooling Circuit of Gas Cleaning." Materials Science Forum 811 (December 2014): 41–48. http://dx.doi.org/10.4028/www.scientific.net/msf.811.41.

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The paper deals with corrosion damage to steel pipes which were a part of the indirect cooling circuit of gas cleaning. The pipes were made from steel ASTM A106 Gr.B. The outer surface of pipes of the inside part of the circuit was affected by flue gases with mean temperature of approximately 1200 °C. The pipes of the outside part of the circuit were exposed to outer environment with mean temperature of about 25 °C. The cooling water flowing in these pipes had mean temperature of about 20 °C and contained a corrosion inhibitor based on zinc chloride (with addition of hydrochloric acid, phosphoric acid and PBTC). Flow rate of cooling water was 3700 m3/h, its total volume 1500 m3, and the pressure of cooling water was 600 kPa. The achieved thickening of cooling water was N=4. Side filtering was accomplished by a filter DPF 4000. The pipes of the cooling circuit were welded to each other, which initiated stress stimulating development of cracks on the outer surface of pipes in the heat-affected zone, Fig.1. The existing technological conditions resulted in formation of deposits on the outer pipe surfaces. Their presence changed thermal conditions in steel pipes.
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Chen, Long, Wei Chen, Jian Dong Li, Si Ning Heng, and Jia Wu. "Optimal Design about Parameters of Cooling Pipes in Hot Stamping Die." Advanced Materials Research 988 (July 2014): 263–67. http://dx.doi.org/10.4028/www.scientific.net/amr.988.263.

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The design reasonability of cooling pipe greatly affects the quenching performance of hot stamping die. In this paper, rectangular box is the carrier, the parameters of cooling pipe section, such as the diameter of cooling pipe, the distance between cooling pipes, the distance between cooling pipes and die surface, were studied by numerical simulation and orthogonal experiments. The quenching uniformity was taken as the evaluation criterion during research. Finally, the optimal parameters about cooling pipes distributed in hot stamping die were obtained and the quenching uniformity was improved.
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Qin, Ming, Hai Tao Dai, and Ming Wei Ge. "Evaluation of Water Cooling System of 1.5MW Rotor Based on CFD." Advanced Materials Research 472-475 (February 2012): 386–90. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.386.

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The water cooling system of 1.5MW rotor is evaluated using Computational Fluid Dynamics (CFD). 48 cooling holes are opened on the rotor stator to arrange the water cooling pipes, the temperature of inlet of the cooling water is 50 C with the velocity 1.2m/s. It is found that the air gap between the cooling pipes and holes on the stator hinders the heat exchange extensively. For this reason, the cooling system can't meet the design requirement. In order to solve this problem, the pourable silicone is filled in the gap between the cooling pipes and holes to enhance thermal conductivity. Based on this idea, ten kinds of piping arrangements are proposed, among which, nine kinds can achieve the cooling requirement.
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Yang, Zhi-Gang, Jin-Lan Song, Yan-Fang Hu, and Kun-Fa Lee. "Discussion on Temperature Control Method of Cooling Water Pipe for Mass Concrete Construction." E3S Web of Conferences 165 (2020): 04037. http://dx.doi.org/10.1051/e3sconf/202016504037.

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For studying the influence of cooling pipes on the mass concrete construction, the dam is taken an example to build the ANSYS finite element model. The model simulates dam concrete construction based on two projects, one without cooling pipes and the other with cooling water pipes provided. The data comparison and analyzing will be in three aspects: temperature, stress and displacement. The result shows that the cooling pipes not only can indeed reduce the concrete temperature in a short time, making the concrete reach the steady temperature more quickly, but also help to alleviate the concrete temperature stress. However, the reductions of temperature do not make a great influence on the displacement during the construction process.
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Sun, Youhong, Xiaofeng Wang, Baochang Liu, Dali Ding, and Qingnan Meng. "Inverse solution to heat transfer coefficient during heat assembly of aluminum alloy drill pipes." Advances in Mechanical Engineering 9, no. 7 (July 2017): 168781401771497. http://dx.doi.org/10.1177/1687814017714970.

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With the rapid development of oil and gas industry, as well as geological exploration industry, the requirements on properties of aluminum alloy drill pipes are increasing. During heat assembly of aluminum alloy drill pipes, the cooling process inside the pipes has a direct impact on the connection performance of pipes. Thus, study of the convective heat transfer coefficient between the cooling water and the internal wall of aluminum alloy pipes is important. Conventional algorithms cannot easily solve the problem of determining the heat transfer coefficient at the complex structure of aluminum alloy drill pipes. Therefore, this article conducts a heat assembly experiment between aluminum alloy drill pipes and steel joints to obtain adequate, accurate temperature data. Based on these experimental data and an inverse heat conduction model, the heat transfer coefficients during the heat assembly process are determined by a finite element program and the differential evolution algorithm. The correlation curve between the cooling water flowrate and the convective heat transfer coefficient obtained in this article is important in the accurate prediction of heat transfer capacity and temperature field distribution during heat assembly at different cooling water flowrates. The analysis results show that the heat transfer coefficients are nonlinear functions of cooling water flowrates. The temperature is highest at location A1 and gradually declines backward along the axis of the drill pipe. The heat transfer coefficient gradually declines backward along the axis of the drill pipe. The increasing flowrate of cooling water will cause the convective heat transfer coefficient along the axis of the drill pipe to escalate irregularly.
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Sun, Shi Mei, Wei Liu, and Shi Yao. "Thermal Simulation of Cooling Channels in Proton Exchange Membrane Fuel Cell." Applied Mechanics and Materials 423-426 (September 2013): 2091–97. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.2091.

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Fuel cells heat dissipation and cooling is a vital part of PEMFC heat management. This paper used pure water as the coolant to control the temperature distribution inside fuel cells. Established cooling channels geometrical model and simulated the temperature distribution in the steady state by using software SINDA/FLUINT. Then discusses the effects of cooling channels branch quantity, diameter and coolant velocity on fuel cell internal temperature distribution, concludes that multi-branch, large diameter pipes and low-velocity coolant make PEMFC work at best conditions.
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Kniazev, S. N., N. V. Tepin, and N. M. Smagin. "DEVELOPMENT OF MANUFACTURING TECHNOLOGY FOR BIMETALLIC PIPES." Izvestiya of Samara Scientific Center of the Russian Academy of Sciences 24, no. 4 (2022): 116–23. http://dx.doi.org/10.37313/1990-5378-2022-24-4-116-123.

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The aim of the study was to develop a cost-effective technological process for manufacturing axisymmetric parts of the "Bimetallic tube" type with an internal cooling circuit. The article proposes to consider the technological process of cold volumetric stamping, which includes the most rational, from the point of view of resource saving, operations - reduction of a billet made of low-carbon structural steel and burnishing of a billet with high resistance to intercrystalline corrosion from low-carbon stainless steel. The product obtained by experimental technology, which is a bimetallic pipe with an internal cooling circuit. The developed computer model of the technological process made it possible to obtain a competitive product that has a wide range of applications. In the course of the work, an experimental study was also conducted, which confirmed the results of computer analysis. The absence of rubber seals in the production of the heat exchanger allows it to be used for aggressive environments in the chemical, oil and gas industry with temperatures from minus 40 to 300 degrees Celsius. The technology will increase the working pressure of the heat carriers to a value of at least 2 MPa. Due to the small cross-section of the cooling circuit, it is possible to achieve high coolant speeds, and the multi-entry circuit allows for a larger volume of coolant. At the same time, the efficiency of the heat exchanger increases by 5% compared to the sectional heat exchanger in its classic design. Quality characteristics: low metal consumption, strength, reliability, safety, ease of installation, maintainability. One of the main advantages of the technology is the high surface quality of the product (Ra 1,6), which guarantees the turbulent flow of the coolant. The efficiency of the heat exchanger according to the strictest estimates and for the most unfavorable conditions is 86.6%.
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Fang, Jian, Yang Hua Li, Kai Yi Xie, Xi Yang Zou, Meng Xiong Zhou, and Ze Xi Yuan. "Study on the Influence of Cooling Rate on the Property of Non-Quenching and Non-Tempering Steel OCTG." Applied Mechanics and Materials 71-78 (July 2011): 837–41. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.837.

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Two industrial produced non-quenching and non-tempering steels 40Mn2V and 36Mn2V had been tested by Gleeble-1500 thermal simulation machine to simulate MPM rolling, sizing and cooling process. The cooling rate in the air noticeably affected the final property of different size pipes. According to the measured practical cooling rates of different size pipes, appropriate size pipes with cooling rate at range of 0.9°C/s~1.6°C/s and 1.6 °C/s~2.1°C/s can be picked out to use steel 40Mn2V and 36Mn2V to produce grade N80 OCTG(Oil Country Tubular Goods) with steady property respectively. This result had been used in practical production, which greatly improved the property stability of grade N80 OCTG.
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Al-Helal, Ibrahim, Abdullah Alsadon, Samy Marey, Abdullah Ibrahim, Mohamed Shady, and Ahmed Abdel-Ghany. "Geothermal Energy Potential for Cooling/Heating Greenhouses in Hot Arid Regions." Atmosphere 13, no. 1 (January 10, 2022): 105. http://dx.doi.org/10.3390/atmos13010105.

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In arid regions, drastic seasonal variations in the climatic parameters are common; thus, a high potential of geothermal effects for heating/cooling applications is expected. However, such applications are very limited in these regions due to the lack of information about underground temperature profiles of the surface and shallow zones. Therefore, this study aims to (i) measure the underground temperature profile for one year to determine the optimum depth for burying EAHE pipes; (ii) examine the possibility of water vapour condensation occurring in the buried EAHE pipes, if the air let into the pipes was humid; and (iii) quantify the maximum cooling/heating capacity, if an EAHE was implemented. The results show that a 3-m depth is optimal to bury EAHE pipes, where the ground temperature is 32 °C in the summer and 29 °C in the winter. These temperatures would provide a maximum cooling/heating capacity of 1000/890 MJ day−1 for each 1 m3 of humid air exhausted from a greenhouse. If the EAHE were to operate in a closed loop with a greenhouse, the condensation of water vapour in the EAHE pipes would be impossible during the cooling process. The results of this study are useful for designers using geothermal effects for indoor space cooling and heating in arid regions.
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Dissertations / Theses on the topic "Cooling pipes"

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Woods, Thomas F. "Heat pipes for electronic cooling." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17213.

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Navarra, Pietro 1979. "Heat pipe cooling of metallurgical furnace equipment." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102819.

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Current water-cooling technology used in the metallurgical industry poses a major safety concern. In addition, these systems are expensive to operate and result in significant energy losses.
The purpose of the research presented in this thesis was to develop a viable cooling system based on novel heat pipe technology which addresses these problems. This technology employs boiling as the means to store and transfer heat energy. The large heat extraction capacity of the device is owed to two design features: firstly, a separate return line that generates a column of liquid working fluid which drains into the evaporator by gravity, and secondly, a helical flow modifier in the evaporator that stabilizes annular two-phase flow.
A full-scale copper tapblock and launder were designed with water-based heat pipe cooling systems. These systems were successfully tested under industrial heat loading conditions, using a gas burner to simulate the heat loads.
The tapblock cooling system was able to dissipate 142 kW per heat pipe, at heat fluxes as high as 2.4 MW/m2. These values are the largest to date using the novel water-based heat pipe technology. The launder system was the first to incorporate horizontal heat pipes, as well as have multiple evaporators feeding a single condenser.
The cooling systems used in both experiments were fundamentally safer than watercooling systems, being operated at low pressures and with only several kilograms of water exposed to the heat source. The cooling water requirements of these systems represent a reduction of 80-95% compared to conventional water-cooling, with increased potential for energy recovery.
During the testing, dry-out and film boiling were identified as the main limitations. It was found that film boiling occurs when the flow in the evaporator is not great enough to generate a helical motion. The dry-out limitation was achieved when the velocity of the flow within the evaporator was too great, causing a large pressure gradient that opposes the gravity head of the return line.
Both of these limitations are related to the configuration of the evaporator, i.e. the return line and the flow modifier. A methodology was developed to model the evaporator numerically using computational fluid dynamics. This methodology can be used to understand how the design parameters of the evaporator affect the flow patterns during operation.
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Morrison, John William. "Auxiliary cooling in heat pipe cooled hypersonic wings." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/17113.

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Chant, Eileen Elizabeth. "Transient and steady state simulations of an advanced desiccant enhanced cooling cycle." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/17846.

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Calance, Marius Alexandru. "Energy Losses Study on District Cooling Pipes : Steady-state Modeling and Simulation." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-18490.

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Distributionsförluster är en viktig faktor i fjärrenergisystem. Genom att optimera förluster i sådana system, kan både ekonomiska och miljömässiga aspekter uppfyllas. Tyvärr finns det ringa information om rörförluster i fjärrkylasystem. Föreliggande studie fokuserar på förluster i ett fjärrkylanät genom att både använda ett R-nätverk och FEM simuleringsmodeller. Ett R-nätverksmodell bestående av termiska konduktanser har utvecklats genom analytiska ekvationer och simuleringar med FEM har utfört för validering av modellen. Därefter har ett fjärrkylanätverk som konstrueras i Gävle, analyserats. Undersökningen omfattar 15 olika rördiametrar i tre utföranden (dubbelrör med två symmetriska och en osymmetrisk värmeisolering) och i tre förläggningsdjup (0,8; 2 och 4 meter) för en säsong om 7 månader (April t o m Oktober). Särskilt utreds ökningen av temperaturen hos framledningsmediet, där matningsrören förlagts i en å mitt i staden om en sträcka av 1 km. Den maximala förlusten under säsongen, bland alla rörkonfigurationer, motsvarar 2 % av den totala levererade energin. Slutligen konstateras att kombinationen av isolerad framledningsrör och oisolerade returrör verkar som en gångbar investering, ekonomiskt och tekniskt, men kan inte användas i hela nätet eftersom stora delar har redan byggts med oisolerade plaströr. R-nätverksmodellen, som visades vara effektiv och pålitlig i undersökningen, kan som beräkningsverktyg, framförallt för dimensionering och för att uppskatta energiförluster.
Distribution losses are a very important factor in district energy systems. By optimizing the losses in such a system, both economical and environmental aspects can be fulfilled. Unfortunately, there is few information regarding losses for district cooling systems. This study focuses on losses in district cooling networks by using both R-network and FEM simulation models. A R-network model composed of thermal conductances has been developed through analytical equations and simulations have been performed for validation. Afterwards, an in-progress construction project of a district cooling network from the city of Gävle, Sweden, is analyzed. The assessment consists of 15 pipe diameters in three configurations (two symmetric cases and one asymmetric), at three ground laying depths (0.8, 2 and 4 meters) for a duration of 7 months (April to October). A particular case in which the main distribution pipes from and to the plant are submerged in the city’s river for a distance of 1 km is investigated in order to estimate the temperature increase of the supply water. A maximum cooling loss below 2% of the total delivered energy during the season for any network configuration resulted from the calculation. Finally, the mixed pipes array seems to be a feasible investment both economically and technically but it cannot be used for the entire network spread since a part of the network has been already built with the non-insulated plastic pipes. The R-network model proved to be effective and reliable in the analysis which provides confidence that it can serve as a solid foundation for a calculation tool - primarily for design purposes and also for estimating energy loss.
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Tybrandt, Ola. "Distribution of Cooling to Avionics." Thesis, Linköpings universitet, Reglerteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-79031.

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In modern aircraft, one of the most difficult issues has been how to provide avionics with adequate cooling. Future versions of the fighter aircraft JAS 39 Gripen is equipped with new applications that have increased heat loads. In previous versions of the JAS 39 Gripen avionics was cooled by zero degree air and fuel, but in the next version a liquid loop will be installed to cool the new radar.The fluid in the liquid loop is cooled to proper temperature by pressurized bleed air from the engine which is cooled by ram air. The air to cool the avionics is produced the same way and this is a very expensive process for the airplane which lowers its performance. It is important to minimize the production of cooling air and therefore three new adjustable valves that provide various components of cooling air are installed in the next version of the JAS 39 Gripen. The cooled and pressure controlled air from the engine is distributed between different avionic shelves, each containing a set of components. Depending on the type of tasks performed and current flight mode of the aircraft the requirement of functions which should be active varies and therefore also the cooling demand to avionics. The first part of this thesis studies the overall priority of how the engine bleed shall be used. This part of the thesis results in a decision basis for the distribution of cooling air to be regulated in the absence of full cooling capacity. The amount of cooling which must be distributed to the radar is proportional to its developed power which varies widely depending on the radar’s operational mode. Since the pump which determines the liquid flow velocity operates at a constant speed is the regulation of cooling to the radar is controlled by varying the bleed air flow into the heat exchanger which cools the fluid and thus the temperature of the fluid has when it reaches the radar. This part of the thesis creates a control algorithm for controlling the airflow into the heat exchanger. The regulation keeps the fluid inlet temperature to the radar within the range of +25 ± 5 ˚ C and the gradient of the temperature less than 0.5° C per second. The PI-controller with the feed-forward filter succeeded in controlling the temperature of the liquid as it reached the radar within +25 ± 1° C, the temperature gradient requirement, 0.5° C per second, was also passed in all flight cases which were used to evaluate the controller. The PI-controller with feed-forward has a low convergence time and no static error. It also performs well when the measurement signals contain a lot of noise because of the controllers integrated low pass filter.   The three new adjustable valves saves 12 to 97 g/s of cooling air for the different valve positions studied in this thesis, this corresponds to 9 - 70% of the total amount of controllable air to the avionics. Since the production of cooling air is a costly process for the aircraft, the use of all 3 valves is recommended.
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Duncan, Tyler Baxter. "Theoretical analysis and experimental investigation of a "tower" heat pipe for desktop computer cooling /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1426054.

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Salani, Marcelo Re. "Estudo das propriedades mecânicas de aços microligados produzidos por laminação controlada seguida de resfriamento acelerado para tubos API/DNV usado no projeto pré-sal /." Guaratinguetá : [s.n.], 2011. http://hdl.handle.net/11449/94378.

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Orientador: Tomaz Manubu Hashimoto
Banca: Marcelo dos Santos Pereira
Banca: Cristina de Carvalho Ares Elisei
Resumo: Com os novos desafios impostos pelas condições cada vez mais severas dos poços de petróleo offshore a necessidade de materiais mais modernos e com melhores propriedades mecânicas tem sido um desafio constante. Neste trabalho foi realizada a caracterização mecânica de tubos fabricados a partir de chapas de aço laminadas a quente, seguido de resfriamento acelerado. Os valores reportados são resultados de testes de laboratório aplicados em corpos de prova retirados do metal de base, de solda e da zona termicamente afetada. A utilização destes aços na fabricação de tubos soldados por processo arco-submerso em dois passes, utilizando arcos múltiplos, tem apresentado resultados de tenacidades confiáveis e superiores aos obtidos a partir de chapas laminadas pelo processo de laminação controlada sem resfriamento acelerado, principalmente em espessuras de 16 mm e superiores. Os requisitos do teste de tenacidade especificados pela norma DNV-OS -F101 aplicados em tubos fabricados de acordo com a norma API 5L, são considerados críticos. A criticidade é função dos valores mínimos a serem obtidos e também da freqüência estabelecida para ser aplicada em cada corrida de aço utilizada na produção de cada item de fabricação. Com isso nota-se uma enorme vantagem do uso dos aços com o processo de resfriamento acelerado, visto que os mesmos tiveram uma melhor homogeneidade nos resultados de limite de escoamento, com um ganho significativo no alongamento e apenas uma pequena redução no limite de resistência. O fato de usarem menores teores de carbono, também favoreceu muito a tenacidade no metal de base e ao longo da ZTA, tendo diferenças extremamente significativas de ganho no teste de impacto e CTOD
Abstract: The main of this work is the mechanical properties characterization of pipes made from steel plates produced using hot rolling with accelerated cooling. The values reported are laboratory tests results, applied on samples taken from the base metal, weld and heat affected zone. The use of these steel plates in the manufacture of pipes by submerged arc welding process using multiple arcs has shown toughness and elongation results superior to those obtained by using hot rolled steel plates without accelerated cooling, particularly in thicknesses of 16 mm and higher. The toughness test requirements specified by DNV-OS-F101 applied for pipes manufactured aiming offshore application are considered critical. The criticality is function of the minimum values required set the sampling frequency to be applied in every steel heat used in the production of each product. Because of this the use of accelerated cooling process shows a significant advantage, since it provides a better homogeneity in yield strength results, with a significant gain in elongation and only a small reduction in tensile strength. The use of smaller amounts of carbon also greatly fostered toughness in base metal and along HAZ, with significant improvement in the impact test and CTOD. Results due to these enhanced properties the use of steels with accelerated cooling technology is essential in order to face technological challenges imposed by new requirements of submarines pipelines
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Reding, Brian D. II. "Tubular and Sector Heat Pipes with Interconnected Branches for Gas Turbine and/or Compressor Cooling." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/969.

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Designing turbines for either aerospace or power production is a daunting task for any heat transfer scientist or engineer. Turbine designers are continuously pursuing better ways to convert the stored chemical energy in the fuel into useful work with maximum efficiency. Based on thermodynamic principles, one way to improve thermal efficiency is to increase the turbine inlet pressure and temperature. Generally, the inlet temperature may exceed the capabilities of standard materials for safe and long-life operation of the turbine. Next generation propulsion systems, whether for new supersonic transport or for improving existing aviation transport, will require more aggressive cooling system for many hot-gas-path components of the turbine. Heat pipe technology offers a possible cooling technique for the structures exposed to the high heat fluxes. Hence, the objective of this dissertation is to develop new radially rotating heat pipe systems that integrate multiple rotating miniature heat pipes with a common reservoir for a more effective and practical solution to turbine or compressor cooling. In this dissertation, two radially rotating miniature heat pipes and two sector heat pipes are analyzed and studied by utilizing suitable fluid flow and heat transfer modeling along with experimental tests. Analytical solutions for the film thickness and the lengthwise vapor temperature distribution for a single heat pipe are derived. Experimental tests on single radially rotating miniature heat pipes and sector heat pipes are undertaken with different important parameters and the manner in which these parameters affect heat pipe operation. Analytical and experimental studies have proven that the radially rotating miniature heat pipes have an incredibly high effective thermal conductance and an enormous heat transfer capability. Concurrently, the heat pipe has an uncomplicated structure and relatively low manufacturing costs. The heat pipe can also resist strong vibrations and is well suited for a high temperature environment. Hence, the heat pipes with a common reservoir make incorporation of heat pipes into turbo-machinery much more feasible and cost effective.
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Kucuk, Sinan. "A Comparative Investigation Of Heat Transfer Capacity Limits Of Heat Pipes." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12609125/index.pdf.

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Heat pipe is a passive two phase device capable of transferring large rates of heat with a minimal temperature drop. It is a sealed tube with a wick structure lined in it and with a working fluid inside the tube. It consists of three parts: an evaporator, a condenser and an adiabatic section. The heat pipes are widely used in electronics cooling and spacecraft applications. Although they can transfer large rate of heat in a short range, they have operating limits, namely: the capillary limit, the viscous limit, the entrainment limit, the sonic limit and the boiling limit. These limits determine the heat transfer capacity of the heat pipe. The properties of the working fluid, the structure of the wick, the orientation of the pipe, the length and the diameter of the tube etc. are the parameters that affect the limits. In this study, an analytical 1-D heat pipe model is formed and a computer code is prepared in order to analyze the effects of the parameters on the heat transfer capacity of a heat pipe. Water, Ammonia and Mercury are investigated as working fluids for different operating temperature ranges. The software is tested for a typical application for each working fluid.
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Books on the topic "Cooling pipes"

1

Design and technology of heat pipes for cooling and heat exchange. Washington: Hemisphere Pub. Corp., 1992.

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Silverstein, Calvin C. Heat pipe cooling for scramjet engines. [Washington, DC]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Marto, P. J. Heat pipe cooling of large electric motors. Monterey, Calif: Naval Postgraduate School, 1988.

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I, Bystrov P., and Kirillin V. A, eds. Liquid-metal coolants for heat pipes and power plants. New York: Hemisphere Pub. Corp., 1990.

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Silverstein, Cal. Design and Technology of Heat Pipes for Cooling and Heat Exchange. Taylor & Francis Group, 2020.

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Silverstein, Cal. Design and Technology of Heat Pipes for Cooling and Heat Exchange. Taylor & Francis Group, 2020.

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Silverstein, Cal. Design and Technology of Heat Pipes for Cooling and Heat Exchange. Taylor & Francis Group, 2020.

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Silverstein, Calvin C. Design and Technology of Heat Pipes for Cooling and Heat Exchange. CRC Press, 2020. http://dx.doi.org/10.1201/9780367813598.

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Silverstein, Cal. Design and Technology of Heat Pipes for Cooling and Heat Exchange. Taylor & Francis Group, 2020.

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I, Bystrov P., Kirillin V. A, and Institut vysokikh temperatur (Akademii͡a︡ nauk SSSR), eds. Zhidkometallicheskie teplonositeli teplovykh trub i ėnergeticheskikh ustanovok. Moskva: "Nauka", 1988.

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Book chapters on the topic "Cooling pipes"

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Mantelli, Marcia Barbosa Henriques. "Electronics Cooling." In Thermosyphons and Heat Pipes: Theory and Applications, 363–82. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-62773-7_10.

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Makarenko, Valerii, Yuriy Vynnykov, and Andrii Manhura. "Investigation of the Mechanical Properties of Pipes for Long-Term Cooling Systems." In Lecture Notes in Civil Engineering, 151–60. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42939-3_17.

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Xu, Jiyuan, and Jiyu Qian. "Research on Heat Transfer Characteristics of Air Cooling Plate Embedded with Heat Pipes." In Lecture Notes in Electrical Engineering, 509–17. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9441-7_52.

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Jhade, Vidhyasagar, Anil Kumar Sharma, D. Ponraju, B. K. Nashine, and P. Selvaraj. "Natural Convection Heat Transfer Enhancement Using Cooling Pipes in the Heat Generating Debris Bed." In Lecture Notes in Mechanical Engineering, 33–42. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6416-7_4.

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Riffat, Saffa, Siddig Omer, and Abdeen Omer. "Environmentally Friendly Systems: Earth Heat Pump System with Vertical Pipes for Heat Extraction for Domestic Heating and Cooling." In Progress in Sustainable Energy Technologies: Generating Renewable Energy, 589–604. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07896-0_36.

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Bowman, Charles F., and Seth N. Bowman. "Pipe Flow." In Engineering of Power Plant and Industrial Cooling Water Systems, 95–112. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003172437-7.

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Zohuri, Bahman. "Direct Reactor Auxiliary Cooling System." In Heat Pipe Applications in Fission Driven Nuclear Power Plants, 203–18. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05882-1_7.

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Smirnov, H. F. "Heat Pipe Technology for Refrigeration and Cooling." In Low Temperature and Cryogenic Refrigeration, 349–72. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0099-4_20.

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Wang, Zhangyuan, Haopeng Zhang, Fucheng Chen, Siming Zheng, Zicong Huang, and Xudong Zhao. "Heat Pipe and Loop Heat Pipe Technologies and Their Applications in Solar Systems." In Advanced Energy Efficiency Technologies for Solar Heating, Cooling and Power Generation, 79–100. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17283-1_3.

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Qian, Xiaodong, Zhen Li, and Hao Tian. "Application of Heat Pipe System in Data Center Cooling." In Progress in Sustainable Energy Technologies Vol II, 609–20. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07977-6_40.

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Conference papers on the topic "Cooling pipes"

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Rogers, S. A. "Fatigue Cracking Of Cooling Water Pipes." In Stress and Vibration: Recent Developments in Measurement and Analysis, edited by Peter Stanley. SPIE, 1989. http://dx.doi.org/10.1117/12.952912.

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Hoang, Triem T., Tamara A. O’Connell, Jentung Ku, C. Dan Butler, and Theodore D. Swanson. "Miniature Loop Heat Pipes for Electronic Cooling." In ASME 2003 International Electronic Packaging Technical Conference and Exhibition. ASMEDC, 2003. http://dx.doi.org/10.1115/ipack2003-35245.

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Thermal management of modern electronics has become a problem of significant interest due to the demand for power and reduction in packaging size. Requirements of next-generation microprocessors in terms of power dissipation and heat flux will certainly outgrow the capability of today’s thermal control technology. LHPs, like conventional heat pipes, are capillary pumped heat transport devices. They contain no mechanical moving part to wear out or require electrical power to operate. But unlike heat pipes, LHPs possess much higher heat transport capabilities enabling them to transport large amounts of heat over long distances in small flexible lines for heat rejection. In fact, a miniature ammonia LHP developed for a NASA space program is capable of transporting 60W over a distance of 1 meter in 1/16”O.D. stainless steel tubing. Therefore, miniature LHPs using water as the working fluid are excellent candidates to replace heat pipes as heat transports in electronic cooling systems. However, a number of operational issues regarding system performance, cost, and integration/packaging must be resolved before water LHPs can become a viable option for commercial electronics.
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Wilson, M., W. Bowman, M. Himes, R. McMullan, R. Wier, W. Bowman, M. Himes, R. McMullan, R. Wier, and M. Wilson. "A review of transpiration cooling in pipes." In 32nd Thermophysics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-2575.

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Miyazaki, Yoshiro. "Cooling of Notebook PCs by Flexible Oscillating Heat Pipes." In ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems collocated with the ASME 2005 Heat Transfer Summer Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/ipack2005-73055.

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An oscillating heat pipe consists of a micro channel which turns many times between the heating section and the cooling section. Herein, a developmental study on flexible oscillating heat pipes for cooling notebook personal computers is presented. The heat pipe functions to transport heat from the CPU to the rear surface of the folding display, which serves as a radiating surface. The heat pipe tubes at the hinge are flexible so that the heat pipe may fold. In order to evaluate the thermal performance of the cooling system, flexible oscillating heat pipes were fabricated and tested. The heat pipes consist of copper capillary tubes and Teflon flexible tubes. Excellent thermal performance was obtained in the test: the thermal resistance was 0.3 K/W and the maximum heat transport capability was 100 W.
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Yamawaki, Shigemichi, Toyoaki Yoshida, Masanobu Taki, and Fujio Mimura. "Fundamental Heat Transfer Experiments of Heat Pipes for Turbine Cooling." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-438.

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Fundamental heat transfer experiments were carried out for three kinds of heat pipes which may be applied to turbine cooling in future aero-engines. In the turbine cooling system with a heat pipe, heat transfer rate and start-up time of the heat pipe are the most important performance criteria to evaluate and compare with conventional cooling methods. Three heat pipes are considered, called heat pipe A, B and C, respectively. All heat pipes have a stainless steel shell and nickel sintered powder metal wick. Sodium(Na) was the working fluid for heat pipes A and B; heat pipe C used eutectic sodium-potassium(NaK). Heat pipes B and C included non-condensible gas for rapid start-up. There were fins on the cooling section of heat pipes. In the experiments, an infrared image furnace supplied heat to the heat pipe simulating turbine blade surface conditions. In the results, heat pipe B demonstrated the highest heat flux of 17 to 20 W/cm2. The start-up time was about 6 minutes for heat pipe B and about 16 minutes for heat pipe A. Thus adding non-condensible gas effectively reduced start-up time. Although NaK is a liquid phase at room temperature, the start-up time of heat pipe C (about 7 to 8 minutes) was not shorter than the heat pipe B. The effect of a gravitational force on heat pipe performance was also estimated by inclining the heat pipe at an angle of 90 degrees. There was no significant gravitational dependence on heat transport for heat pipes including non-condensible gas.
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Hoang, Triem, Tamara O'Connell, Dmitriy Suhkov, and Jentung Ku. "Large-Area Cooling with Cryogenic Loop Heat Pipes." In 39th AIAA Thermophysics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-4272.

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Anderson, William G., Sandra Hoff, Dave Winstanley, John Phillips, and Scott DelPorte. "Heat Pipe Cooling of Turboshaft Engines." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-220.

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Reduction in turbine engine cooling flows is required to meet the IHPTET Phase II engine performance levels. Heat pipes, which are devices with very high thermal conductance, can help reduce the required cooling air. A survey was conducted to identify potential applications for heat pipes in turboshaft engines. The applications for heat pipe cooling of turbine engine components included the power turbine first stage vanes, shroud, and case, the HP turbine vanes and shroud, and the T5 temperature probe. Other potential applications for heat pipe cooling include regenerative cycle and intercooling, bearing cooling, IR signature reduction, and active clearance control. Calculated performance benefits included an increase in specific shaft horsepower, and a decrease in specific fuel consumption, as determined with an IHPTET Phase II turboshaft engine performance model. For example, using heat pipes to cool the power turbine vanes, shroud, and case would increase the specific shaft horsepower by 6 percent, while decreasing the specific fuel consumption by 2.2 percent. While this study examined turboshaft engines, most of the applications are also applicable to turbofan engines.
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Amin, Mahmoud, Ghada A. Abdel Aziz, Mohammad Naraghi, Marvel Palatty, Andrew Benz, and Dulce Ruiz. "Improving the Data Center Servers Cooling Efficiency via Liquid Cooling-based Heat Pipes." In 2020 IEEE Industry Applications Society Annual Meeting. IEEE, 2020. http://dx.doi.org/10.1109/ias44978.2020.9334731.

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Machiroutu, Sridhar V., Himanshu Pokharna, and Masahiro Kuroda. "Challenges and Advances of Heat Pipes in Cooling Notebook Systems." In ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ipack2007-33249.

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Notebooks represent an increasing percentage of PC client market with growth surpassing that of desktop computers. Heat pipe has been an integral part of notebook computer system cooling and will remain so for the foreseeable future. Heat pipe allows for efficient transport of heat from the CPU and other high power components to a location where there is more room for accommodating motherboard cutout for a fan and a heat exchanger. The thermal resistance along this path must be minimized to enable maximum cooling. This paper first briefly describes the contributing resistance in a heat pipe and ways to measure them for a notebook thermal solution. Since there are several parameters that can affect the performance of the heat pipes, we use an experimental procedure utilizing DOE (Design of Experiments) to first understand the sensitivities of these design, manufacturing and usage parameters on performance and then to arrive at an optimum level of these parameters to minimize various resistances in a heat pipe. We show that for various different wick technologies, it is possible to optimize the heat pipes to achieve an evaporator performance of the level of 0.1 C-cm2/W. Furthermore, we show some simple design rules to minimize the condenser resistance and also results of a design study to optimize the design of heat pipe block at the CPU end to minimize the evaporator resistance. We want to encourage the heat pipe vendor community to use these methods to optimize their products for performance as well as process enhancements to produce higher performing parts, at lower cost.
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Buffone, Cosimo, Claudio Bruno, and Khellil Sefiane. "Liquid Metal Heat Pipes for Cooling Rocket Nozzle Walls." In 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-4452.

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Reports on the topic "Cooling pipes"

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Cao, Yiding. An Innovative Turbine Blade Cooling Technology and Micro/Miniature Heat Pipes for Turbine Blades. Fort Belvoir, VA: Defense Technical Information Center, July 2000. http://dx.doi.org/10.21236/ada381455.

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Benson, David A., Steven N. Burchett, Stanley H. Kravitz, Charles V. Robino, Carrie Schmidt, and Chris P. Tigges. Kovar Micro Heat Pipe Substrates for Microelectronic Cooling. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/7792.

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Silverstein, C. C. Heat pipe radiation cooling evaluation: Task 2 concept studies report. Office of Scientific and Technical Information (OSTI), October 1991. http://dx.doi.org/10.2172/441729.

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Martin, R. A., M. A. Merrigan, M. G. Elder, J. T. Sena, E. S. Keddy, and C. C. Silverstein. Heat pipe radiation cooling (HPRC) for high-speed aircraft propulsion. Phase 2 (feasibility) final report. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10150250.

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Chinn, D., G. Holman, T. Lo, and R. Mensing. Probability of pipe failure in the reactor coolant loops of Westinghouse PWR plants. Volume 4. Pipe failure induced by crack growth in west coast plants. Office of Scientific and Technical Information (OSTI), July 1985. http://dx.doi.org/10.2172/5569098.

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Holman, G., and C. Chou. Probability of pipe failure in the reactor coolant loops of Westinghouse PWR Plants. Volume 1. Summary report. Office of Scientific and Technical Information (OSTI), July 1985. http://dx.doi.org/10.2172/5655355.

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Holman, G., T. Lo, and C. Chou. Probability of pipe failure in the reactor coolant loops of Combustion Engineering PWR plants. Volume 1. Summary report. Office of Scientific and Technical Information (OSTI), January 1985. http://dx.doi.org/10.2172/6112446.

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Chatani, K. Application of 3-dimensional radiation transport codes to the analysis of the CRBR prototypic coolant pipe chaseway neutron streaming experiment. Office of Scientific and Technical Information (OSTI), August 1992. http://dx.doi.org/10.2172/7074657.

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Lo, T., S. Bumpus, D. Chinn, R. Mensing, and G. Holman. Probability of failure in BWR (Boiling Water Reactor) reactor coolant piping: Volume 2, Pipe failure induced by crack growth and failure of intermediate supports. Office of Scientific and Technical Information (OSTI), March 1989. http://dx.doi.org/10.2172/6163101.

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Ravindra, M., R. Campbell, R. Kennedy, and H. Banon. Probability of pipe failure in the reactor coolant loops of Combustion Engineering PWR Plants. Volume 3. Double-ended guillotine break indirectly induced by earthquakes. Office of Scientific and Technical Information (OSTI), January 1985. http://dx.doi.org/10.2172/6078770.

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