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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05 Mar 2010
TL;DR: In this paper, a 3D CFD model with two-phase flowing was established and simulation of two operations, upwind and downwind, was pressed in the wavy plate of the evaporative condenser, by means of the FLUENT software.
Abstract: A 3‐dimension CFD model with two‐phase flowing was established and simulation of two operations—upwind, downwind with two‐phase flowing was pressed in the wavy plate of the evaporative condenser, by means of the FLUENT software, which provided a direct illustration of the influence of the water film flowing on spray water flow, wind velocity, wind direction in the plate. It was shown that the advantages of air‐water parallel‐flow over countercurrent in making use of enhanced heat transfer of fluid film.
TL;DR: In this paper , a four-stage condensers in series system was adopted to solve the problems of insufficient condensation of high-temperature pyrolysis steam, where the internal fluids conducted countercurrent convection heat exchange.
Abstract: A four-stage condensers in series system was adopted to solve the problems of insufficient condensation of high-temperature pyrolysis steam and difficulty in the classification and recovery of pyrolysis oil, where the internal fluids conducted countercurrent convection heat exchange. A steady-state physical and mathematical model of a single condenser was established to clarify the discipline of heat transfer between the internal fluids. Meanwhile, the model of pyrolysis steam coupled multi-stage condensers was proposed with the help of the model compound firstly. A numerical simulation was carried out and the results showed that when the number of condensers in series was four, the heat transfer process of the system reached saturation, and the heat exchange of the cold and hot fluids was completely realized, and it was of little significance to continue to connect more condensers in series for the condensation of pyrolysis steam. To quickly condense the hot fluid, the key was to increase the mass flow rate of the cold fluid in the first-stage condenser. Compared with the experimental values, the calculated values of hot fluid outlet temperature were not higher than 10%, indicating that the model was highly reliable.
19 May 2023
Patent•
30 Jul 2020
TL;DR: In this article, a blood processing apparatus with a blood flow path and a heat exchanger fluid flow path overlapping the heat exchange chamber is described, in which the blood flows generally from a first end to a second end of the blood processing device, and the heat exchanged fluid flows generally between the second end to the first end.
Abstract: Described is a blood processing apparatus with a blood flow path and a heat exchanger fluid flow path overlapping the a heat exchanger chamber, in which the blood flows generally from a first end to a second end of the blood processing apparatus, and the heat exchanger fluid flows generally from the second end to the first end. Such "counter" or "countercurrent" flow improves heat transfer between the blood and the heat exchanger fluid. The blood processing apparatus includes a housing, a blood inlet, a heat exchanger fluid inlet and a heat exchanger fluid outlet, a heat exchanger core, a cylindrical shell having an annular shell aperture, a blood flow distributor, and a central chamber in fluid communication to a fluid flow distributor.