An experimental study on the heat transfer performance characteristics of horizontal tube falling film absorbers for single-stage absorption heat transformer

2021 ◽  
Vol 198 ◽  
pp. 117485
Author(s):  
Jeong Jae Kim ◽  
Kyung Jin Bae ◽  
Yong Chan Kim ◽  
Oh Kyung Kwon
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Transfer Performance ◽  
Horizontal Tube ◽  
Single Stage ◽  
Performance Characteristics ◽  
Transfer Performance ◽  
Falling Film ◽  
Falling Film Absorbers ◽  
Heat Transformer

Heat transfer performance and bundle-depth effect in horizontal-tube falling film evaporators

2013 ◽  
Vol 51 (4-6) ◽  
pp. 830-836 ◽  
Author(s):  
Shengqiang Shen ◽  
Gangtao Liang ◽  
Yali Guo ◽  
Rui Liu ◽  
Xingsen Mu
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Performance ◽  
Horizontal Tube ◽  
Transfer Performance ◽  
Falling Film ◽  
Depth Effect

scholarly journals CFD studies on the influence of un-wetted area on the heat transfer performance of the horizontal tube falling film evaporation

2021 ◽  
pp. 56-56
Author(s):  
Dilli Balaji ◽  
Ramalingam Velraj ◽  
Malavarappu Ramanamurthy
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat Transfer Performance ◽  
Horizontal Tube ◽  
Published Data ◽  
Transfer Performance ◽  
Falling Film ◽  
Film Evaporation ◽  
Falling Film Evaporation ◽  
Wetted Area

This paper discusses about the effect of un-wetted area of tube on the heat transfer performance of horizontal tube falling film evaporation. A 2D CFD model was developed to perform simulations and investigate the output and validated them with published data available in the literature. In the present study the VOF method is used to track the boundary of the liquid vapour from the contours of volume fraction. Effect of varying tube wall temperature or wall super heat (6 to 11?C) on un-wetted area, heat transfer co-efficients and mass transfer co-efficients of the circular tube were obtained from the simulation model and the results were analysed and reasons were identified and discussed here. The threshold value of wall super heat above which phase change occurs between liquid film and tube surface is identified as 6?C. Also it is noted that mass transfer rate increases and then decreases with increase of wall super heat and heat transfer co-efficient showed declining trend.

EXPERIMENTAL STUDY ON THERMAL TRANSPORT PHENOMENON OF NANOFLUIDS AS WORKING FLUID IN HEAT EXCHANGER

2014 ◽  
Vol 22 (01) ◽  
pp. 1450005 ◽  
Author(s):  
SHUICHI TORII
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Heat Transfer Performance ◽  
Pure Water ◽  
Horizontal Tube ◽  
Constant Heat Flux ◽  
Working Fluid ◽  
Transfer Performance ◽  
Nanoparticles Concentration ◽  
Transfer Behavior

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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