Experimental study on flue gas condensate capture and heat transfer in staggered tube bundle heat exchangers

2018 ◽  
Vol 141 ◽  
pp. 819-827 ◽  
Author(s):  
Enlu Wang ◽  
Kai Li ◽  
Naveed Husnain ◽  
Deli Li ◽  
Jinda Mao ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Flue Gas ◽  
Heat Exchangers ◽  
Tube Bundle ◽  
Gas Condensate

Experimental Study of Flow Induced Vibration on Heat Transfer Helical Tube Bundle

2008 ◽  
Author(s):  
Lixia Gao ◽  
Jie Yang ◽  
Zilong Jiang ◽  
Jianzhong Ma ◽  
Song Li
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
High Pressure ◽  
Tube Bundle ◽  
Flow Induced Vibration ◽  
Steady State Operation ◽  
Helical Tube ◽  
Asme Code ◽  
Fatigue Evaluation ◽  
Large Flow

In this paper, the Flow Induced Vibration (FIV) tests of heat transfer helical tube bundle have been carried out. The results show that the more large flow velocity in tube becomes, the more high pressure drop of bundle is. The dynamic buckling of bundle does not occur during steady-state operation. The fatigue evaluation has been done according to ASME code and the structure is founded to satisfy the ASME code requirements.

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

2011 ◽  
Vol 143-144 ◽  
pp. 698-702 ◽  
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.

Comparative Experimental Study on Performance of Corrugated Tube and Straight Tube Heat Exchanger

2012 ◽  
Vol 560-561 ◽  
pp. 156-160
Author(s):  
Lin Ping Lu ◽  
Liang Ying
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Heat Exchangers ◽  
Straight Tube ◽  
Lower Stress ◽  
Shell Side ◽  
Tube Heat Exchanger ◽  
Corrugated Tube

The experiments on heat transfer coefficient, pressure drop and thermal stress were done to heat exchangers with corrugated tubes and staight tubes. By analyising and comparing the heat transfer coeffient, pressure drop in tube side and shell side and axial force and stress, some conclusions can be conducted that the corrugated tube heat exchanger has better heat transfer coeffient, higher pressure drop and much lower stress caused by temperatur difference, also, it has obvious advantages under the circumstance of low Reynolds number and high temperature difference.

Numerical Study of Transport Membrane Condenser Heat Exchangers

2016 ◽  
Author(s):  
Esmaiil Ghasemisahebi ◽  
Soheil Soleimanikutanaei ◽  
Cheng-Xian Lin ◽  
Dexin Wang
Keyword(s):  
Flue Gas ◽  
Heat Exchangers ◽  
Ceramic Membrane ◽  
Waste Heat ◽  
Numerical Study ◽  
Tube Bundle ◽  
Pure Water ◽  
Separation Mechanism ◽  
Low Grade ◽  
Water Recovery

In this study tube bundle Transport Membrane Condenser (TMC) has been studied numerically. The tube walls of TMC based heat exchangers are made of a nano-porous material and has a high membrane selectivity which is able to extract condensate pure water from the flue gas in the presence of other non-condensable gases (i.e. CO2, O2 and N2). Low grade waste heat and water recovery using ceramic membrane, based on separation mechanism, is a promising technology which helps to increase the efficiency of boilers and gas or coal combustors. The effects of inclination angles of tube bundle, different flue gas velocities, and the mass flow rate of water and gas flue have been studied numerically on heat transfer, pressure drop and condensation rates. To assess the capability of single stage TMC heat exchangers in terms of waste heat and water recovery at various inlet conditions, a single phase multi-component model is used. ANSYS-FLUENT is used to simulate the heat and mass transfer inside TMC heat exchangers. The condensation model and related source/sink terms are implemented in the computational setups using appropriate User Defined Functions (UDFs).

Compact Miniature Heat Exchangers With Advanced Foam-Like Structure

2005 ◽  
Author(s):  
Eugene M. Wexler ◽  
Lev J. Tuchinsky ◽  
Sharly Ibrahim ◽  
Lance J. Milligan
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Convective Heat Transfer ◽  
Hydraulic Resistance ◽  
Convective Heat ◽  
Heat Exchangers ◽  
Transfer Properties

Experimental study has been carried out to investigate convective heat transfer properties of air-cooled foam-like miniature heat exchangers, fabricated using innovative polycapillary materials technology. Practically important results with regard to heat transfer and hydraulic resistance were established and compared for heat exchangers with different structure.

A numerical study of heat transfer in the in-line tube bundle under pulsating fluid flow conditions

Vestnik IGEU ◽  
2019 ◽  
pp. 12-21
Author(s):  
A.I. Khaibullina ◽  
A.R. Khairullin
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Numerical Study ◽  
Tube Bundle ◽  
Cross Flow ◽  
Pulsating Flow ◽  
Operating Parameters ◽  
Flow Conditions ◽  
Study Results ◽  
Shell And Tube

Shell-and-tube heat exchangers are widely used in different industries. Even a small increase in the efficien-cy of shell-and-tube heat exchangers can lead to significant energy savings. One of the ways to improve the efficiency of shell-and-tube heat exchangers is the use of pulsating flows for the enhancement of heat ex-change. Despite the fact that heat transfer in the tube bundle cross flow in steady-state conditions has been studied quite well, there is limited data on heat transfer in pulsating flow, which means that the problem of finding regularities of heat transfer with pulsating flows in tube bundles is still important. The work employs the incompressible Reynolds averaged Naviere-Stokes (URANS) equations and the continuity equation. Heat transfer is described by the convective heat transfer (Fourier-Kirchhoff) equation. The calculations are performed using Ansys Fluent. A numerical study has been conducted of the effects of forced asymmet-rical pulsating flow on heat exchange in in-line tube bundle cross-flow conditions. In the numerical experi-ment the Reynolds number Re ranged from 1000 to 2000, the relative pulsating amplitude A/D – from 1 to 2, the Strouhal number Sh – from 0,77 to 1,51, the Prandtl number and the duty cycle had fixed values: Pr = 7,2,  = 0,25. The relative transverse and longitudinal pitch was s1,2/D = 1,3. It has been found that pulsating flows lead to the enhancement of heat transfer in the whole range of the studied operating parameters. An increase in A/D and Sh leads to bigger Nusselt number Nu. An increase in the Re number leads to a de-crease in the Nu ratio in pulsating and steady flow conditions. The general correlation obtained based on the numerical study results can be used to predict heat transfer in a pulsating flow in the range of the studied geometric and operating parameters. More research is needed to predict heat transfer in a wider range of operating parameters and with other tube bundle configurations.

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