Topic
Countercurrent exchange
About: Countercurrent exchange is a research topic. Over the lifetime, 2255 publications have been published within this topic receiving 28687 citations. The topic is also known as: Countercurrent exchange.
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9 citations
Patent•
19 May 2010
TL;DR: In this article, a double-shell side U-tube heat exchanger is applied in coking and fertilizer plants and other chemical industries and belongs to the field of heat recovery, where the U-shaped heat exchange tubes can be prevented from being expanded under high temperature so that larger thermal stress is not generated on the tube plate and the baffle plate.
Abstract: The utility model particularly relates to a double-shell side U-tube heat exchanger which is applied in coking and fertilizer plants and other chemical industries and belongs to the field of heat recovery. The heat exchanger comprises a front end channel box, a tube plate and a shell side barrel, and is characterized in that a longitudinal baffle and a U-shaped heat exchange piping is arranged in the shell side barrel, the longitudinal baffle is welded with the tube plate into an integrated structure, and an arched baffle plate is arranged on the longitudinal baffle. The longitudinal baffle and the tube plate are welded to be integrally machined, and then are assembled with the baffle plate and the U-shaped heat exchange piping, thereby heat exchange tubes can be prevented from being expanded under high temperature so that larger thermal stress is not generated on the tube plate and the baffle plate; the structure is used to realize the complete countercurrent heat exchange after the heat exchanger runs, so that the heat exchange efficiency is improved and the operational flexibility of the heat exchanger can be more adaptable to the production requirements, and thereby not only being beneficial to improving the yield and quality indicator of anhydrous ammonia, but also reducing the energy consumption. The utility model has comparative simple and compact structure, low machining and producing difficulty, durability, good heat exchange effect and high efficiency.
9 citations
TL;DR: In this paper, boundary conditions for asymmetric wall heat fluxes in double-pass parallel-plate laminar countercurrent operations are analyzed theoretically by using an eigenfunction expansion in terms of power series for the homogeneous part and an asymptotic solution for the non-homogeneous part.
9 citations
TL;DR: In this article, a Methode de calcul des separateurs de gaz a membrane poreuse, utilisant la formule de Present et de Bethune comme equation de permeation de base.
Abstract: Methode de calcul des separateurs de gaz a membrane poreuse, utilisant la formule de Present et de Bethune comme equation de permeation de base. L'accord est bon avec des resultats experimentaux obtenus a cocourant et a contrecourant
9 citations