Thermal analysis of heat transfer performance in a horizontal tube bundle

This paper aims to study the convective heat transfer behavior of aqueous suspensions of nanoparticles flowing through a horizontal tube heated under constant heat flux condition. Consideration is given to the effects of particle concentration and Reynolds number on heat transfer enhancement and the possibility of nanofluids as the working fluid in various heat exchangers. It is found that (i) significant enhancement of heat transfer performance due to suspension of nanoparticles in the circular tube flow is observed in comparison with pure water as the working fluid, (ii) enhancement is intensified with an increase in the Reynolds number and the nanoparticles concentration, and (iii) substantial amplification of heat transfer performance is not attributed purely to the enhancement of thermal conductivity due to suspension of nanoparticles.

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Improved Tube Structure and Segmental Baffle to Enhance Heat Transfer Performance of Elastic Tube Bundle Heat Exchanger

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2021.117703 ◽

2021 ◽

pp. 117703

Author(s):

Jiadong Ji ◽

Runmiao Gao ◽

Baojun Shi ◽

Jingwei Zhang ◽

Feiyang Li ◽

...

Keyword(s):

Heat Transfer ◽

Heat Exchanger ◽

Heat Transfer Performance ◽

Tube Bundle ◽

Elastic Tube ◽

Transfer Performance ◽

Enhance Heat Transfer ◽

Tube Structure

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Experimental study of heat transfer performance of horizontal-tube falling film evaporator

10.5004/dwt.2021.26927 ◽

2021 ◽

Vol 218 ◽

pp. 87-96

Author(s):

Qingsheng Li ◽

Yongze Shen ◽

Shengwang Lai

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Heat Transfer Performance ◽

Horizontal Tube ◽

Transfer Performance ◽

Falling Film ◽

Film Evaporator

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Study on the Conical Spiral Tube Bundle Heat Exchangers with Pulsation Flow Generator Structure

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.143-144.698 ◽

2011 ◽

Vol 143-144 ◽

pp. 698-702 ◽

Cited By ~ 1

Author(s):

Meng Ran Ge ◽

Ke Yan ◽

Pei Qi Ge ◽

Jun Gao

Keyword(s):

Heat Transfer ◽

Natural Frequency ◽

Heat Exchangers ◽

Heat Transfer Performance ◽

Tube Bundle ◽

Elastic Tube ◽

Transfer Performance ◽

Spiral Tube ◽

Flow Generator ◽

Planar Elastic Tube Bundle

Elastic tube bundles are universally used in heat transfer enhancement by flow-induced vibration in heat exchangers, and the study of the heat transfer performance is of importance. The structure of conical spiral tube bundle heat exchanger was introduced first, and the structure of pulsation flow generator was also introduced. The frequency of pulsation flow was discussed. Finally, in condition of same shell side diameter, the heat transfer and natural frequency of the conical spiral tube bundle were compared with the planar elastic tube bundle. The results show that the natural frequency of conical spiral tube bundle was smaller, the heat transfer performance of conical spiral tube bundle was better than the planar elastic tube bundle.

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