Heat‐in‐leak and longitudinal wall heat conduction influence on three‐fluid cross‐flow heat exchanger performance

Heat Transfer ◽  
2020 ◽  
Author(s):  
Jyothiprakash K. H. ◽  
Seetharamu K. N.
Keyword(s):  
Heat Conduction ◽  
Heat Exchanger ◽  
Cross Flow ◽  
Longitudinal Wall ◽  
Flow Heat

Experimental Investigation of a Cross-Flow Heat Exchanger with Wing-Type Vortex Generators

2008 ◽  
Vol 15 (2) ◽  
pp. 113-127 ◽  
Author(s):  
isak kotcioglu ◽  
Sinan Caliskan
Keyword(s):  
Experimental Investigation ◽  
Heat Exchanger ◽  
Cross Flow ◽  
Vortex Generators ◽  
Flow Heat

CROSS-FLOW HEAT EXCHANGER EMBEDDED WITHIN A POROUS MEDIUM

2010 ◽  
Vol 13 (11) ◽  
pp. 981-988 ◽  
Author(s):  
L. B. Younis
Keyword(s):  
Porous Medium ◽  
Heat Exchanger ◽  
Cross Flow ◽  
Flow Heat

A Simplified Formula for Cross-Flow Heat Exchanger Effectiveness

1978 ◽  
Vol 100 (4) ◽  
pp. 746-747 ◽  
Author(s):  
B. S. Baclic
Keyword(s):  
Heat Exchanger ◽  
Cross Flow ◽  
Flow Heat ◽  
Simplified Formula

The Effect of Longitudinal Heat Conduction on Periodic-Flow Heat Exchanger Performance

1964 ◽  
Vol 86 (2) ◽  
pp. 105-117 ◽  
Author(s):  
G. D. Bahnke ◽  
C. P. Howard
Keyword(s):  
Heat Conduction ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Zero Element ◽  
General Purpose ◽  
Periodic Flow ◽  
Gas Streams ◽  
Flow Heat ◽  
Area Use ◽  
Significant Figures

A numerical finite-difference method of calculating the effectiveness for the periodic-flow type heat exchanger accounting for the effect of longitudinal heat conduction in the direction of fluid flow is presented. The method considers the metal stream in crossflow with each of the gas streams as two separate but dependent heat exchangers. To accommodate the large number of divisions necessary for accuracy and extrapolation to zero element area, use was made of a general purpose digital computer. The values of the effectiveness thus obtained are good to four significant figures while those values for the conduction effect are good to three significant figures. The exchanger effectiveness and conduction effect have been evaluated over the following range of dimensionless parameters. 1.0⩾Cmin/Cmax⩾0.901.0⩽Cr/Cmin⩽∞1.0⩽NTU0⩽1001.0⩾(hA)*⩾0.251.0⩾As*⩾0.250.01⩽λ⩽0.32

Heat and Mass Transfer to Air in a Cross Flow Heat Exchanger with Surface Deluge Cooling

2016 ◽  
Vol 24 (01) ◽  
pp. 1650002 ◽  
Author(s):  
Andrea Diani ◽  
Luisa Rossetto ◽  
Roberto Dall’Olio ◽  
Daniele De Zen ◽  
Filippo Masetto
Keyword(s):  
Heat Exchanger ◽  
Heat Flow ◽  
Flow Rate ◽  
Data Center ◽  
Heat Dissipation ◽  
Cross Flow ◽  
Critical Conditions ◽  
Heat Flow Rate ◽  
External Temperature ◽  
Flow Heat

Cross flow heat exchangers, when applied to cool data center rooms, use external air (process air) to cool the air stream coming from the data center room (primary air). However, an air–air heat exchanger is not enough to cope with extreme high heat loads in critical conditions (high external temperature). Therefore, water can be sprayed in the process air to increase the heat dissipation capability (wet mode). Water evaporates, and the heat flow rate is transferred to the process air as sensible and latent heat. This paper proposes an analytical approach to predict the behavior of a cross flow heat exchanger in wet mode. The theoretical results are then compared to experimental tests carried out on a real machine in wet mode conditions. Comparisons are given in terms of calculated versus experimental heat flow rate and evaporated water mass flow rate, showing a good match between theoretical and experimental values.

scholarly journals Simulation of Cross Flow Heat Exchanger for Multi Tubes Using FLUENT 6.3.26

2013 ◽  
Vol 65 (3) ◽  
Author(s):  
Suneela Sardar ◽  
Shahid Raza Malik
Keyword(s):  
Heat Exchanger ◽  
Cross Flow ◽  
Flow Heat

Minimum Irreversibility Criteria for Heat Exchanger Configurations

1999 ◽  
Vol 121 (4) ◽  
pp. 241-246 ◽  
Author(s):  
F. E. M. Saboya ◽  
C. E. S. M. da Costa
Keyword(s):  
Heat Capacity ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Cross Flow ◽  
Second Law Of Thermodynamics ◽  
The Other ◽  
Maximum Heat ◽  
Transfer Rates ◽  
Mass Flow Rates ◽  
Flow Heat

From the second law of thermodynamics, the concepts of irreversibility, entropy generation, and availability are applied to counterflow, parallel-flow, and cross-flow heat exchangers. In the case of the Cross-flow configuration, there are four types of heat exchangers: I) both fluids unmixed, 2) both fluids mixed, 3) fluid of maximum heat capacity rate mixed and the other unmixed, 4) fluid of minimum heat capacity rate mixed and the other unmixed. In the analysis, the heat exchangers are assumed to have a negligible pressure drop irreversibility. The Counterflow heat exchanger is compared with the other five heat exchanger types and the comparison will indicate which one has the minimum irreversibility rate. In this comparison, only the exit temperatures and the heat transfer rates of the heat exchangers are different. The other conditions (inlet temperatures, mass flow rates, number of transfer units) and the working fluids are the same in the heat exchangers.

Exact Solution to the Governing PDE of a Hot Water-to-Air Finned Tube Cross-Flow Heat Exchanger

2004 ◽  
Vol 10 (1) ◽  
pp. 21-31 ◽  
Author(s):  
Chris Delnero ◽  
Dave Dreisigmeyer ◽  
Douglas Hittle ◽  
Peter Young ◽  
Charles Anderson ◽  
...  
Keyword(s):  
Exact Solution ◽  
Heat Exchanger ◽  
Cross Flow ◽  
Finned Tube ◽  
Hot Water ◽  
Flow Heat
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