ESTIMATION OF HEATAERODYNAMIC EFFICIENCY OF SCREWING TUBE BUNDLES

assessment of the efficiency of s.p.g.c refineries using network dea

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

simulation of laminar and turbulent flow around tube bundles and effect of rynolds number

when flow passes over the tube bundles, energy of flow transfers to the tubes. the fluid induced vibrations (fiv) imposed on the tubes is one of the important problems in analyzing the tube bundles and causes several problems. in this work, first, laminar flow around circular cylinder asymmetrically in a channel is simulated. the reynolds number is 20 and 100. the lift forces to tube are not ze...

Miniaturization of Flexible Screwing Cell

The research in mini, micro and desktop factories originates from the early 90’s and has continued since then by developing the technological basis and different technological building bricks and applications in the field of highprecision manufacturing and assembly of future miniaturised and micro products. This has paved the way for mini, micro and desktop factories which are seen as one poten...

Fluidic delivery of homogeneous solutions through carbon tube bundles.

A wide array of technological applications requires localized high-rate delivery of dissolved compounds (in particular, biological ones), which can be achieved by forcing the solutions or suspensions of such compounds through nano or microtubes and their bundled assemblies. Using a water-soluble compound, the fluorescent dye Rhodamine 610 chloride, frequently used as a model drug release compou...

An iterative approach for estimation of efficiency by weighted distance