This study presents an alternative methodological approach for thermal rating of power cables installed in vertical risers covered by unvented circular protective guards. An analogue thermal-electrical circuit is proposed for the thermal analysis of cables inside vertical risers. The proposed equivalent analogue model is verified by means of indoor experiments and finite-element simulations wit...

Abstract The dynamics of the installation process marine risers subjected to shoal/deep seawater is studied. riser assumed be a cantilevered Euler‒Bernoulli beam. upper end clamped on vessel or drilling platform. lower connected Blowout Preventer Stack (BOPs) and Lower Marine Risers Package (LMRP). lateral fluid forces induced by sea wave current are introduced into governing equations motion. ...

Riser sleeves are an effective tool in the steel foundry industry for minimizing riser size and increasing casting yield. Reliable simulation of the performance of riser sleeves requires accurate temperature dependent thermophysical properties. Unfortunately there is little or no such property data available in the open literature. A limited number of sleeve manufacturers provide advice and pro...

P.Ragothaman,[email protected] Dr.N.V.Mahalakshmi,[email protected] Institute for Energy Studies, Anna University, Chennai-25,Tamilnadu, India. P.sudhakar,[email protected] Abstract Circulating fluidized bed reactors are widely applied in industry for power generation in boilers and gasifier. Computational Fluid dynamics modeling of hydrodynamics and heat transfer can be an effe...

The growth of biotechnology has led to renewed interest in the possibility of enriching valuable bioproducts using foam fractionation. This is a separation process in which surface active molecules are separated from a solution by sparging through bubbles of gas. Adsorption of such molecules at the gas/liquid interface causes enrichment in the foam formed above the liquid pool. Previous work ha...

OBJECTIVE Stair-riser banners are twice as effective as posters in encouraging stair climbing in shopping centres. This study tested the effectiveness of stair-riser banners in an English train station in 2006-2007. METHOD The train station had a 39-step staircase and an adjacent escalator. Baseline observations (3.5 weeks) were followed by 10.5 weeks of a banner intervention supplemented wit...

In the hilly regions of China, developing sustainable agriculture requires implementing conservation management practices that prevent soil erosion and conserve soil and water resources. In the semiarid northwest Loess Plateau, the primary conservation management practice is terracing. Numerical simulation of soil water dynamics in terraces is potentially an efficient means of investigating the...

In pipeline-riser systems, pressure fluctuations which result from the formation of large liquid slugs and gas surges due to operational changes or low mass flow rate from production wells and the profile of pipeline-riser systems often lead to trips at the inlet of the separator; and thereby, the problem causes a a loss of the production.In this study, on a sample deep-water oil field off the ...