Modeling Large Diameter Industrial Pipe Insulation Performance

2021 ◽  
Vol 263 (5) ◽  
pp. 1555-1560
Author(s):  
Kevin Herreman
Keyword(s):  
Large Diameter ◽  
Small Diameter ◽  
Cost Effective ◽  
Noise Emission ◽  
Cost Effective Method ◽  
Diameter Pipe ◽  
Insulation Systems ◽  
The Cost ◽  
Pipe Insulation ◽  
Insulation Performance

As previously presented, reducing industrial noise emission utilizing jacketed pipe insulation is critical to reducing noise in industrial spaces. The ISO 15665 standard defines a testing process for measurement of the acoustical performance of installed and jacketed pipe insulation systems. To provide a cost-effective method for evaluating various types of multilayered jacketed pipe insulation a model was developed. The model accurately estimates the performance of single, and multilayered, jacketed pipe insulation. Validating the use of the model to very large pipe diameters is highly desirable as the cost to test is significantly higher than testing the medium or small diameter pipe insulation. The estimated insertion loss result from the model is compared to validation testing results for large diameter jacketed pipe insulation are reported herein.

Modeling Industrial Pipe Insulation Performance

2021 ◽  
Vol 263 (5) ◽  
pp. 1548-1554
Author(s):  
Kevin Herreman
Keyword(s):  
Insertion Loss ◽  
Sufficient Accuracy ◽  
Acoustic Model ◽  
Test Results ◽  
Noise Emission ◽  
One Dimensional ◽  
Insulation Systems ◽  
The Cost ◽  
Pipe Insulation ◽  
Insulation Performance

Reducing industrial noise emission utilizing jacketed pipe insulation is critical to reducing noise in industrial spaces. The ISO 15665 standard defines a testing process for measurement of the acoustical performance of installed and jacketed pipe insulation systems. However, the cost of testing per this standard, especially when using an external laboratory, can be very costly. That makes the development of a model to accurately estimate the performance of single, and multilayered, jacketed pipe insulation highly desirable. Utilizing a one-dimensional theoretical acoustic model along with empirical data, a model with sufficient accuracy to provide insertion loss results relative to the ISO 15665 standard was created. The creation and resulting functionality of the model for determining jacketed pipe insulation insertion loss and comparison of the resulting data to test results will be discussed herein.

CAD Of Anticorrosive Protection Of Steel Structures

2019 ◽  
pp. 18-23
Keyword(s):  
Protective Coating ◽  
Computer Aided Design ◽  
Steel Structures ◽  
Cost Effective ◽  
Operating Conditions ◽  
Computational Tool ◽  
Protection Method ◽  
Cost Effective Method ◽  
The Cost ◽  
Aided Design

The choice of cost-effective method of anticorrosive protection of steel structures is an urgent and time consuming task, considering the significant number of protection ways, differing from each other in the complex of technological, physical, chemical and economic characteristics. To reduce the complexity of solving this problem, the author proposes a computational tool that can be considered as a subsystem of computer-aided design and used at the stage of variant and detailed design of steel structures. As a criterion of the effectiveness of the anti-corrosion protection method, the cost of the protective coating during the service life is accepted. The analysis of existing methods of steel protection against corrosion is performed, the possibility of their use for the protection of the most common steel structures is established, as well as the estimated period of effective operation of the coating. The developed computational tool makes it possible to choose the best method of protection of steel structures against corrosion, taking into account the operating conditions of the protected structure and the possibility of using a protective coating.

Method of Fuels and Lubricants Performance Properties Requirements Management

2021 ◽  
Vol 624 (2) ◽  
pp. 16-24
Author(s):  
Yu. M. Pimenov ◽  
◽  
A. V. Ulit’ko ◽  
V. A. Sereda ◽  
◽  
...  
Keyword(s):  
Cost Effective ◽  
Life Cycles ◽  
Requirements Management ◽  
Performance Properties ◽  
Operational Conditions ◽  
Quantitative Expression ◽  
Laboratory Bench ◽  
Motor Fuels ◽  
Cost Effective Method ◽  
The Cost

The cost-effective method of fuels and lubricants performance properties requirements management is proposed. Method ensures effectiveness enhancement of equipment and of fuels and lubricants life cycles; it includes requirements establishment (constructing of conceptual and empirical models of requirements), their quantitative expression through highly informative indicators of fuels and lubricants propensity for transformations, then approbation with the use of laboratory, bench and test stands tests, specification, assessment of realization in real world equipment operational conditions, effectiveness evaluation and modification of requirements. Some illustrations of application of the new method phases with regards to motor fuels and hydraulic fluid are provided.

Evaluation of Residual Stresses Induced by Repairs to Small Diameter Stainless Steel Pipe Welds

2015 ◽  
Author(s):  
Trevor G. Hicks ◽  
William R. Mabe ◽  
Jason R. Miller ◽  
John V. Mullen
Keyword(s):  
Stainless Steel ◽  
Residual Stresses ◽  
Large Diameter ◽  
Small Diameter ◽  
Steel Pipe ◽  
Limited Information ◽  
Diameter Pipe ◽  
Stainless Steel Pipe ◽  
Lower Magnitude ◽  
The Impact

Residual stresses within stainless steel pipe welds may cause or exacerbate in-service cracking. Significant investigative efforts have been devoted to the examination of piping residual stresses in large diameter piping using both finite element modeling and experimental techniques, but limited information is available for small diameter piping. Even less information is available for small diameter piping welds which have been repaired or re-worked during initial fabrication. This investigation used both experimental methods and analytical modeling to assess the impact of repair welding during initial fabrication on the residual stresses along the inner diameter (ID) of small diameter pipe specimens. The investigation showed that tensile axial residual stresses were located in the heat affected zone (HAZ) along the ID of the pipe specimens adjacent to regions which were excavated and re-welded. Such repair welds were also shown to markedly increase the magnitude of the tensile axial residual stresses for weld configurations which otherwise had lower magnitude residual stresses.

The Engineering Technology Index Analysis of the Low-Carbon Building

2012 ◽  
Vol 535-537 ◽  
pp. 1985-1990
Author(s):  
Bao Ku Qi ◽  
Jing Ming Zhao ◽  
Yu Qu
Keyword(s):  
Cost Effective ◽  
Low Carbon ◽  
Engineering Technology ◽  
Architectural Form ◽  
Cost And Benefit ◽  
Low Carbon Economy ◽  
Cost Effective Method ◽  
The Cost ◽  
Analysis Mode ◽  
Carbon Economy

Low-carbon building is the new building types under the background of low-carbon economy. Compared with traditional architectural form, the cost and benefit of the low-carbon building have changed a lot; therefore, it is necessary to analyze the low-carbon building from the perspective of cost and benefit. This paper structured an analysis mode through the cost-effective method, and also provided a new analysis idea and approach to value the low-carbon building, so it has an important referential value for the promotion and construction of low-carbon building in the whole society.

scholarly journals Using DSLR to 'Scan' Colour Slides: learning from the Digitising Jemdet Nasr 1988–1989 Project

2020 ◽  
Author(s):  
Mónica Palmero Fernández
Keyword(s):  
Dynamic Range ◽  
Cost Effective ◽  
Archaeological Site ◽  
High Dynamic Range ◽  
Photographic Film ◽  
Film Scanner ◽  
Cost Effective Method ◽  
High Dynamic ◽  
University Department ◽  
The Cost

This article presents a cost-effective method for digitising photographic film for archival purposes using a DSLR camera, focussing on the widely used colour reversal Kodachrome film produced by Eastman Kodak between 1935 and 2009. I discuss the digitisation of an archive of 787 Kodachrome slides taken between 1988 and 1989 during the excavation of Jemdet Nasr, an archaeological site located in southern Iraq (Project website). I compare results obtained using a film scanner (Nikon Coolscan IV ED) with two different scanning software solutions (SilverFast and VueScan), a flatbed scanner (HP Scanjet 8300), and two DSLR cameras with macro lens (a Canon EOS KissX3 with 105mm lens and a Canon EOS 80D with 90mm lens). The results demonstrate the cost-effective value of the DSLR method for archives where time and resources are limited, but where digital photography equipment might be readily available, such as an archaeological unit or a university department. The method allows for high quality, fast and economical digitisation of excavation and collection archives that will enhance research. The method also offers superior results in rendering the high dynamic range of photographic film such as Kodachrome.

scholarly journals Understanding the Cost-Effectiveness of Hearing Aids and Surgery for the Treatment of Otosclerosis

2022 ◽  
Author(s):  
Danielle M. Gillard ◽  
Jeffrey D. Sharon
Keyword(s):  
Quality Of Life ◽  
Cost Effectiveness ◽  
Hearing Aids ◽  
Cost Effective ◽  
Stapes Surgery ◽  
Cost Effective Method ◽  
Patient Reported ◽  
Complications Of Surgery ◽  
The Cost

Abstract Purpose of Review To summarize and critically review recent literature on the relative cost-effectiveness of hearing augmentation versus stapes surgery for the treatment of otosclerosis. Recent Findings Otosclerosis leads to reduced patient quality of life, which can be ameliorated by either stapes surgery, or hearing aid usage. The success of stapes surgery is high, and the risks of serious postoperative complications are low. Hearing aids don’t have the complications of surgery but are associated with long-term costs. Cost-effectiveness models have shown that stapes surgery is a cost-effective method for treating otosclerosis. Summary Both stapes surgery and hearing aids can improve patient-reported quality of life in otosclerosis. Stapes surgery has larger upfront costs and surgical risks, but hearing aids are associated with longer lifetime costs. Stapes surgery is cost-effective for the treatment of otosclerosis.

Time of flight flow meters as a reliable and cost effective monitoring alternative in sewer systems

2002 ◽  
Vol 46 (6-7) ◽  
pp. 397-402
Author(s):  
B. Harmuth ◽  
V. Erbe
Keyword(s):  
Local Authority ◽  
Large Diameter ◽  
Cost Effective ◽  
Flow Meters ◽  
Wastewater Disposal ◽  
Flow Metering ◽  
Sewer Systems ◽  
Cost Effective Method ◽  
Precise Analysis ◽  
Sewage Systems

The replacement and operation of sewage systems are now among the most cost intensive areas of local authority wastewater disposal activities. Measurements are especially important for a precise analysis of the condition of a system. This paper reports on experience with the operation of transit-time ultrasonic flow meters. Ultrasonic flow metering has proved to be a precise, cost-effective method of carrying out measurements in large-diameter sewers.

Asphalt-Rubber Overlay on Rubblized Concrete Pavement on I-135

1996 ◽  
Vol 1543 (1) ◽  
pp. 71-78 ◽  
Author(s):  
Glenn A. Fager
Keyword(s):  
Thermal Characteristics ◽  
Cost Effective ◽  
Concrete Pavement ◽  
Portland Cement Concrete ◽  
Process Data ◽  
Asphalt Rubber ◽  
Cost Effective Method ◽  
Cement Concrete Pavement ◽  
Control Section ◽  
The Cost

During 1993 and 1994, the Kansas Department of Transportation constructed a 15.25-km full-depth asphalt-rubber project on I-135. Three test sections were finished in 1994 along with one control section in 1995. The test sections consisted of both a thick and thin asphalt-rubber section over rubblized portland cement concrete pavement (PCCP) and a completely reconstructed asphalt-rubber section. The control section was built over rubblized PCCP to the same thickness as the thick asphalt-rubber section. Approximately 172 000 metric tons of asphalt-rubber were produced using the wet (reacted) process. Data indicated that the asphalt-rubber mix cost approximately 50 percent more than the asphalt-only mix. Reducing the thickness of the asphalt-rubber from 225 mm to 180 mm would allow the cost to become equal to the asphalt-only control section. Equal performance of the reduced thickness section or longer performance from the 225-mm asphalt-rubber section would be a cost-effective method of using tire rubber in asphalt pavements. Test data indicate a stable mix and adequate thermal characteristics but high permeabilities. Performance after 6 winter months under traffic indicates no raveling, rutting, flushing, cracking, or moisture damage.

scholarly journals Influencing Factors of Motion Responses for Large-Diameter Tripod Bucket Foundation

2019 ◽  
Vol 9 (22) ◽  
pp. 4957 ◽  
Author(s):  
Xianqing Liu ◽  
Puyang Zhang ◽  
Mingjie Zhao ◽  
Hongyan Ding ◽  
Conghuan Le
Keyword(s):  
Water Depth ◽  
Large Diameter ◽  
Maximum Amplitude ◽  
Cost Effective ◽  
Offshore Wind ◽  
Pitching Motion ◽  
Bucket Foundation ◽  
Response Amplitude Operators ◽  
Effective Development ◽  
The Cost

Large-diameter multi-bucket foundation is well suited for offshore wind turbines at deeper water than 20 m. Air floating transportation is one of the key technologies for the cost-effective development of bucket foundation. To predict the dynamic behavior of large-diameter tripod bucket foundation (LDTBF) supported by an air cushion and a water plug inside every bucket in waves, three 1/25-scale physical model tests with different bucket spacing were conducted in waves; detailed prototype foundation models were established using a hydrodynamic software MOSES with a draft of 4.0 m, 4.5 m, and 5.0 m and with a water depth of 10.0 m, 11.25 m, and 12.5 m. The numerical and experimental results are consistent for heaving motion, while exhibiting favorable agreement for pitching motion. The results show that the resonant periods for heaving motion increased with increasing draft and water depth. The maximum amplitude for heaving motion first decreased and then increased with the increase of water depth and spacing between the buckets. The maximum amplitude for pitching motion first decreased and then increased with increasing water depth but decreased with increasing spacing between the buckets. The wider the spacing between the bucket foundations, the larger the heave response amplitude operators (RAOs). Simply improving the pitch RAOs by increasing the spacing between bucket foundations is limited and negatively affects motion performance during the transportation of LDTBF.

Sign in / Sign up

Export Citation Format

Share Document