Research on heat exchange performance of ultra-high power fast axial flow CO 2 laser and design of the heat exchanger

2008 ◽  
Author(s):  
Hongyan Huang ◽  
Youqing Wang ◽  
Qing Li ◽  
Xinting Jia
Keyword(s):  
Heat Exchanger ◽  
Heat Exchange ◽  
High Power ◽  
Axial Flow ◽  
Exchange Performance

F103 Study of Heat Exchange Performance in a Cylindrical Micro heat exchanger

2010 ◽  
Vol 2010.15 (0) ◽  
pp. 207-208
Author(s):  
Adhika WIDYAPARAGA ◽  
Masashi KUWAMOTO ◽  
Naoya SAKODA ◽  
Hiromi KUBOTA ◽  
Masamichi KOHNO ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Heat Exchange ◽  
Exchange Performance ◽  
Micro Heat Exchanger

Research on the Construction Technology of Radial Underground Heat Exchanger and its Heat Exchange Performance

2014 ◽  
Vol 580-583 ◽  
pp. 2488-2491
Author(s):  
Rong Hui Wang ◽  
Qing Hua Wang ◽  
Ye Feng
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Surface Temperature ◽  
Heat Transfer Performance ◽  
Transfer Performance ◽  
Ground Heat Exchanger ◽  
Construction Technology ◽  
Exchange Performance ◽  
Radial Heat

5 radial heat exchange wells were designed, and the different angle drilling, drilling pipe, and grouting backfill construction technology was studied. In addition, the heat transfer performance of the buried radial heat exchange wells was tested. The results show that, design of pipe equipment is feasible, construction is convenient, and the ratio of backfill material is reasonable; the heat transfer performance of 90 °buried tube is the best. The smaller the angle with the ground heat exchanger, the greater the heat exchange performance is affected by the surface temperature.

scholarly journals Study on turbulent flow in wave wall tube heat exchanger

2021 ◽  
Vol 2076 (1) ◽  
pp. 012025
Author(s):  
Liang Zhang ◽  
Anlong Zhang
Keyword(s):  
Heat Exchanger ◽  
Heat Exchange ◽  
Pressure Drop ◽  
Turbulent Flow ◽  
Average Pressure ◽  
Flow State ◽  
Tube Heat Exchanger ◽  
Exchange Performance ◽  
Straight Wall ◽  
Corrugated Structure

Abstract The traditional straight wall tube heat exchanger has low heat exchange efficiency, in order to solve this problem, the turbulent flow in wave wall tube heat exchanger was studied by numerical simulation. It is found that the unique corrugated structure of the heat exchange tube in the wave wall tube heat exchanger can improve the flow state of the fluid in the heat exchanger. The average pressure drop of heat exchanger gradually increases with the increase of Reynolds number Re. Under the same conditions, the average pressure drop of wave wall tube heat exchanger is lower than that of straight wall tube heat exchanger. The improvement of heat exchange performance of heat exchanger can not be realized only by increasing the inlet flow of heat exchanger. The wave wall tube heat exchanger can strengthen the heat exchange of the fluid in the heat exchanger.

Cardioplegia heat exchanger design modelling using computational fluid dynamics

Perfusion ◽  
2000 ◽  
Vol 15 (6) ◽  
pp. 541-548 ◽  
Author(s):  
Michael R van Driel
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Surface Area ◽  
Computer Aided Design ◽  
Optimization Techniques ◽  
Field Analysis ◽  
Cfd Analysis ◽  
Exchange Performance

A new cardioplegia heat exchanger has been developed by Sorin Biomedica. A three-dimensional computer-aided design (CAD) model was optimized using computational fluid dynamics (CFD) modelling. CFD optimization techniques have commonly been applied to velocity flow field analysis, but CFD analysis was also used in this study to predict the heat exchange performance of the design before prototype fabrication. The iterative results of the optimization and the actual heat exchange performance of the final configuration are presented in this paper. Based on the behaviour of this model, both the water and blood fluid flow paths of the heat exchanger were optimized. The simulation predicted superior heat exchange performance using an optimal amount of energy exchange surface area, reducing the total contact surface area, the device priming volume and the material costs. Experimental results confirm the empirical results predicted by the CFD analysis.

Design of an Experimental System for Cryogenic Compact Exchanger

2010 ◽  
Author(s):  
Jiancheng Tang ◽  
Yingbai Xie
Keyword(s):  
Heat Exchanger ◽  
Heat Exchange ◽  
Energy Saving ◽  
Measurement System ◽  
Experimental System ◽  
Thermal System ◽  
Transfer Lines ◽  
Exchange Performance ◽  
Main Components ◽  
Cold Box

Heat exchanger is one of the most important devices in thermal system. An experimental system is developed for testing the heat-exchange performance of cryogenic compact exchangers. This system mainly consists of a regenerator, a cold box, a liquid nitrogen dewar, two cryogenic transfer lines and other devices. The features of the main components are described in this paper. A measurement system based on PC is developed for this system. All of these make this system more reliable, convenient, and energy-saving.

COMPUTER SIMULATION OF FLOW IN CORRUGATED CHANNEL OF PLATE HEAT EXCHANGER

2020 ◽  
pp. 51-58
Author(s):  
Л. А. Кущев ◽  
В. Н. Мелькумов ◽  
Н. Ю. Саввин
Keyword(s):  
Computer Simulation ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
High Speed ◽  
Exchange Process ◽  
Plate Heat Exchanger ◽  
System Stability ◽  
Plate Heat ◽  
Corrugated Channel ◽  
Heat Exchange Process

Постановка задачи. Рассматривается теплообменный процесс, протекающий в модифицированном гофрированном межпластинном канале интенсифицированного пластинчатого теплообменного аппарата с повышенной турбулизацией теплоносителя. Необходимо разработать компьютерную модель движения теплоносителя в диапазоне скоростей 0,1-1,5 м/с и определить коэффициент турбулизации пластинчатого теплообменника. Результаты. Приведены результаты компьютерного моделирования движения теплоносителя в межпластинном гофрированном канале оригинального пластинчатого теплообменного аппарата с помощью программного комплекса Аnsys . Определены критерии устойчивости системы. Выполнено 3 D -моделирование канала, образуемого гофрированными пластинами. При исследовании процесса турбулизации были рассмотрены несколько скоростных режимов движения теплоносителя. Определен коэффициент турбулизации Tu, %. Выводы. В результате компьютерного моделирования установлено увеличение коэффициента теплопередачи К, Вт/(м ℃ ) за счет повышенной турбулизации потока, что приводит к снижению металлоемкости и уменьшению стоимости теплообменного оборудования. Statement of the problem. The heat exchange process occurring in a modified corrugated interplate channel of an intensified plate heat exchanger with an increased turbulence of the heat carrier is discussed. A computer model of the coolant movement in the speed range of 0.1-1.5 m/s is developed and the turbulence coefficient of the plate heat exchanger is determined. Results. The article presents the results of computer modeling of the coolant movement in the interplate corrugated channel of the original plate heat exchanger using the Ansys software package. The criteria of system stability are defined. 3D modeling of the channel formed by corrugated plates is performed. In the study of the process of turbulence several high-speed modes of movement of the coolant were considered. The turbulence coefficient Tu, % is determined. Conclusions. As a result of computer simulation, an increase in the heat transfer coefficient K, W/(m ℃) was found due to an increased turbulization of the flow, which leads to a decrease in metal consumption and a decrease in the cost of heat exchange equipment.

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