Effect of working parameters of the plate heat exchanger on the thermal performance of the anti-bact heat exchanger system to disinfect Legionella hot water systems

2018 ◽  
Vol 141 ◽  
pp. 435-443
Author(s):  
Lobna Altorkmany ◽  
Mohamad Kharseh ◽  
Anna-Lena Ljung ◽  
T. Staffan Lundström
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Water Systems ◽  
Plate Heat Exchanger ◽  
Hot Water ◽  
Plate Heat ◽  
Working Parameters

Thermal performance investigation in a novel corrugated plate heat exchanger

2020 ◽  
Vol 148 ◽  
pp. 119095 ◽  
Author(s):  
Salman Al zahrani ◽  
Mohammad S. Islam ◽  
Feng Xu ◽  
Suvash C. Saha
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Plate Heat Exchanger ◽  
Plate Heat

scholarly journals CFD SIMULATION OF THE HEAT TRANSFER PROCESS IN A CHEVRON PLATE HEAT EXCHANGER USING THE SST TURBULENCE MODEL

2015 ◽  
Vol 55 (4) ◽  
pp. 267 ◽  
Author(s):  
Jan Skočilas ◽  
Ievgen Palaziuk
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Transfer Process ◽  
Cfd Simulation ◽  
Numerical Study ◽  
Analytical Calculation ◽  
Heat Transfer Process ◽  
Plate Heat Exchanger ◽  
Hot Water ◽  
Plate Heat

<p>This paper deals with a computational fluid dynamics (CFD) simulation of the heat transfer process during turbulent hot water flow between two chevron plates in a plate heat exchanger. A three-dimensional model with the simplified geometry of two cross-corrugated channels provided by chevron plates, taking into account the inlet and outlet ports, has been designed for the numerical study. The numerical model was based on the shear-stress transport (SST) <em>k-!</em> model. The basic characteristics of the heat exchanger, as values of heat transfer coefficient and pressure drop, have been investigated. A comparative analysis of analytical calculation results, based on experimental data obtained from literature, and of the results obtained by numerical simulation, has been carried out. The coefficients and the exponents in the design equations for the considered plates have been arranged by using simulation results. The influence on the main flow parameters of the corrugation inclination angle relative to the flow direction has been taken into account. An analysis of the temperature distribution across the plates has been carried out, and it has shown the presence of zones with higher heat losses and low fluid flow intensity.</p>

scholarly journals FEATURES OF LIQUID FLOW DISTRIBUTION IN PLATE HEAT EXCHANGERS REFERENCES

2021 ◽  
Vol 5 (12) ◽  
pp. 47-55
Author(s):  
Y. Elistratova ◽  
A. Seminenko ◽  
V. Minko ◽  
R. Ramazanov
Keyword(s):  
Heat Exchanger ◽  
Heat Exchange ◽  
Flow Rate ◽  
Plate Heat Exchanger ◽  
Hot Water ◽  
Hydraulic Calculation ◽  
Diagnostic Systems ◽  
Inlet Pipe ◽  
Plate Heat ◽  
Distribution Features

The relevance of the work of information and diagnostic systems in the field of monitoring of plate heat exchange equipment is considered. The reliability of the monitoring devices requires an accurate mathematical description of the thermo hydrodynamic processes in the heat exchange channels. The classical description of these processes implies a uniform distribution of the flow rate of the working medium along the length of the plate package, which in turn implies equal conditions for the formation of salt deposition products on the heating surfaces of the plate heat exchanger. The use of dependencies that take into account the equality of costs for a package of plates reduces the reliability of diagnostics of the efficiency of hot water devices of the plate type. Since the geometric space formed by the plates is represented by parallel channels connected by sections of transit collectors, the method of resistance characteristics is proposed as a method of hydraulic calculation of the distribution features of liquid flows through heat exchange channels. The dependence of the design features of the location of the interplate channels relative to the input of the coolant into the distribution manifold is revealed. It is found that, the flow rate of the circulating coolant is less in the channels most remote from the inlet pipe than in the nearest channels. The hypothesis of the influence of the relative position of the channels in relation to the inlet pipe is confirmed by numerical studies of the hydrodynamic regime of the plate heat exchanger.

New experimental Nusselt number correlation for spiral plate heat exchanger optimized using a code

2020 ◽  
pp. 095765092094829
Author(s):  
Meisam Ghodrati ◽  
Jamshid Khorshidi
Keyword(s):  
Experimental Data ◽  
Nusselt Number ◽  
Heat Exchanger ◽  
Plate Heat Exchanger ◽  
Average Error ◽  
Plate Heat ◽  
Complete Uncertainty ◽  
Working Parameters ◽  
Spiral Plate ◽  
Nusselt Number Correlation

A system of a spiral plate heat exchanger and its required auxiliaries was built. The pitches of heat exchanger were built differently to provide almost two geometrically different heat exchangers in a single package. Several experiments were done and working parameters of the heat exchanger were measured. A code was written to find a new optimised correlation that could approximate the Nusselt Number based on the obtained experimental data from 51 reliable experiments. As an advantage, that correlation was valid for low Reynolds Numbers. Also, in most of previous works, the correlation for Nusselt Number in one side of the heat exchanger was supposed to be known and the correlation for the other side was determined. But, in this study, the equation was found using calculations for both sides simultaneously. The overal heat transfer coefficient calculated from the proposed correlation, made an average error of 3.65% to the experimental data. A complete uncertainty analysis was done and revealed that the results from the new correlation for the Nusselt Number lies between [Formula: see text] around the real Nusselt Number.

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