scholarly journals Experimental and Numerical Investigation of Nanofluid Usage in a Plate Heat Exchanger for Performance Improvement

2019 ◽  
Vol 8 (1) ◽  
pp. 27 ◽  
Author(s):  
Adnan Sözen ◽  
Ataollah Khanları ◽  
Erdem Çiftçi
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Investigation ◽  
Performance Improvement ◽  
Active Agent ◽  
Plate Heat Exchanger ◽  
Deionized Water ◽  
Working Fluid ◽  
Improvement Rate ◽  
Plate Heat

Plate heat exchangers, a compact-type heat exchanger, are commonly used heat transfer devices because of their superior characteristics. Their thermal performances are strongly dependent to working fluid circulating inside the system. The influences of nanofluid utilization as the working fluid in a plate heat exchanger was experimentally and numerically analysed in this study. In order to show off the improvement rate in heat transfer, the experiments were performed by using deionized water and TiO2-deionized water nanofluid. The nanofluid was prepared at the rate of 1.5 % as weighted. A surface-active agent, Triton X-100, was also doped into the mixture at the rate of 0.2% of a final concentration to prevent the sedimentation and flocculation of the nanoparticles inside the solution. The experiments were performed in different temperatures as 40°C, 45°C, 50°C and varying cold fluid mass flow rates as 3,4, 5, 6 and 7 lpm.  In addition, using the experimental data, a numerical simulation was realized by ANSYS Fluent software.  The both results indicate that heat transfer rate in plate heat exchanger can be improved using nanofluid as the working fluid in place of deionized water. The maximum improvement rate in heat transfer was obtained as 11 % in experimental study. It is also seen that experimental and numerical results are in good agreement.©2019. CBIORE-IJRED. All rights reservedArticle History: Received May 18th 2018; Received in revised form October 17th 2018; Accepted January 8th 2019; Available onlineHow to Cite This Article: Sözen, A., Khanlari, A., and Çiftçi, E. (2019) Experimental and Numerical Investigation of Nanofluid Usage in a Plate Heat Exchanger for Performance Improvement. Int. Journal of Renewable Energy Development, 8(1), 27-32.https://doi.org/10.14710/ijred.8.1.27-32

Heat transfer enhancement of plate heat exchanger utilizing kaolin-including working fluid

2019 ◽  
Vol 233 (5) ◽  
pp. 626-634 ◽  
Author(s):  
Adnan Sözen ◽  
Ataollah Khanları ◽  
Erdem Çiftçi
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
High Efficiency ◽  
Plate Heat Exchanger ◽  
Deionized Water ◽  
Working Fluid ◽  
Improvement Rate ◽  
Plate Heat ◽  
Triton X

Plate heat exchangers having high efficiency and small size are one of the mostly used heat exchangers. They are used in many applications ranging from cooling to heating. Heat transfer improvement of plate heat exchangers can be performed using nanoparticle-including working fluids, i.e. nanofluids. Influences of kaolin-including nanofluid utilization as working fluid on heat transfer performance of the plate heat exchanger were experimentally investigated in this study. The prepared nanofluid included 2% (wt/wt) nanoparticle content and Triton X-100 surfactant was added to the prepared mixture at the rate of 0.2% of a final concentration to increase the solubility of nanoparticles. The experiments were performed in various working conditions with changes in mass flow rate and temperature. The obtained results showed that nanofluid usage as the working fluid enhanced the heat transfer rate in plate heat exchanger in comparison to the results acquired from the tests conducted by deionized water. The improvement rate in mean heat transfer coefficient was achieved as 9.3% when kaolin–deionized water nanofluid was used as the working fluid in plate heat exchanger.

Numerical Investigation and Thermodynamic Analysis on a Novel Regular Hexagonal Plate Heat Exchanger

2010 ◽  
Author(s):  
Wenjing Du ◽  
Fei Wang ◽  
Gongming Xin ◽  
Shihu Zhang ◽  
Lin Cheng
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Heat Exchanger ◽  
Numerical Investigation ◽  
Thermodynamic Analysis ◽  
Entropy Generation ◽  
Plate Heat Exchanger ◽  
Working Fluid ◽  
Plate Heat ◽  
Hexagonal Plate

In conventional Plate Heat Exchangers (PHEs), a good heat transfer performance is usually obtained at the cost of much pumping power consumption. In order to address this dilemma, a novel Regular Hexagonal Plate Heat Exchanger (RHPHE) is proposed in this paper. Specially-shaped spherical ribs and quasi-spiral flow paths are designed on plates with the purpose of achieving a best trade-off between the heat transfer and fluid flow performance. Because of its regular hexagonal structure with 3 inlets and 3 outlets, three or at least two kinds of fluids with different temperatures can exchange heat in a single set of heat exchanger. It is an innovation that multiple fluids heat transfer in a PHE without the assistance of supplementary baffles. Numerical investigation is carried out on the RHPHE and water is the working fluid. The heat transfer and flow performance of the RHPHE in a series of working conditions are investigated. Results show that heat transfer coefficient per unit pressure drop of the RHPHE is much better than that of the widely accepted PHE with 60° chevron corrugations. Also studied is the influence of various combinations of inlet and outlet positions on heat transfer and fluid flow performance. For the thermodynamic analysis, the entropy generation caused by heat conduction under finite temperature difference and fluid friction is obtained numerically. The variation of the entropy generation number with respect to the Reynolds number is depicted, which provides reference for the future optimization design of the RHPHE.

Visualization of FC-72 Flow Boiling in Parallel- and Counter-Flow Plate Heat Exchangers

2014 ◽  
Author(s):  
Kohei Koyama ◽  
Yuya Nakamura ◽  
Hirofumi Arima
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Flow Pattern ◽  
Void Fraction ◽  
Flow Boiling ◽  
Plate Heat Exchanger ◽  
Parallel Flow ◽  
Working Fluid ◽  
Counter Flow ◽  
Plate Heat

This study investigates FC-72 (Perfluorohexane) flow boiling in a plate heat exchanger. A plate heat exchanger which has a transparent cover plate is manufactured to visualize boiling two-phase flow pattern of the working fluid FC-72 heated by hot water. Titanium is used for heat transfer plate, which has micro pin-fin structure on the heat transfer surface to enhance heat transfer. Experiment is conducted for parallel- and counter-flow arrangements to compare thermal and hydraulic performances. Flow boiling is photographed by a digital camera and instantaneous images are processed to classify flow pattern and to measure void fraction in the heat exchanger. Flow rates and temperatures of FC-72 and hot water at inlet and outlet of the heat exchanger are simultaneously measured to obtain overall heat transfer coefficient. Two-phase flow pattern of FC-72 flow boiling and void fraction along flow direction as well as thermal performance are discussed. Experimental results show that bubbly flow, slug flow, and churn flow are observed for the experimental range of this study. Extent of churn flow in the parallel-flow heat exchanger is larger than that of the counter-flow one due to generated bubbles at upstream region in working fluid channel. Void fraction of the parallel-flow plate heat exchanger increases rapidly compared with that of the counter-flow one due to location of onset of nucleate boiling. Overall heat transfer coefficients for the parallel-flow arrangement is larger than that of the counter-flow due to destruction of thermal boundary layer. The experimental results show that flow arrangement of a plate heat exchanger has the potential to improve its thermal performance.

A New Approach to Numerical Simulation of Small Sized Plate Heat Exchangers With Chevron Plates

2006 ◽  
Vol 129 (3) ◽  
pp. 291-297 ◽  
Author(s):  
Sanjeev Jain ◽  
Aniruddha Joshi ◽  
P. K. Bansal
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Plate Heat Exchanger ◽  
Working Fluid ◽  
Computational Domain ◽  
Counter Flow ◽  
Number Range ◽  
New Approach ◽  
Plate Heat ◽  
Thermal Boundary Conditions

A numerical and experimental study of heat transfer and fluid flow in a single pass counter flow plate heat exchanger with chevron plates has been presented in this paper. CFD analysis of small sized plate heat exchanger was carried out by taking the complete geometry of the heat transfer surface and more realistic hydrodynamic and thermal boundary conditions. A cold channel with two chevron plates and two halves of hot channels on either side having flat periodic boundaries was selected as the computational domain. The numerical model was validated with data from experiments and empirical correlations from literature. Heat transfer and pressure drop data were obtained experimentally with water as the working fluid, in the Reynolds number range 400–1300 and the Prandtl number range 4.4–6.3.

Numerical investigation of heat transfer and fluid flow in plate heat exchanger using nanofluids

2014 ◽  
Vol 85 ◽  
pp. 93-103 ◽  
Author(s):  
Arun Kumar Tiwari ◽  
Pradyumna Ghosh ◽  
Jahar Sarkar ◽  
Harshit Dahiya ◽  
Jigar Parekh
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Heat Exchanger ◽  
Numerical Investigation ◽  
Plate Heat Exchanger ◽  
Plate Heat

scholarly journals Experimental Investigation and Comparison of Shell Tube and Plate Heat Exchanger used in Water Chillers

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Shamkuwar S.C ◽  
◽  
Nitin Chopra ◽  
Mihir Kulkarni ◽  
Nikhil Ahire ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Plate Heat Exchanger ◽  
Working Fluid ◽  
Plate Heat ◽  
Tube Heat Exchanger ◽  
Overall Heat Transfer Coefficient ◽  
Shell And Tube

The main objective of the paper is to compare the performance of Shell and tube heat exchanger (STHE) and Plate heat exchanger (PHE) used in chillers. The paper deals with experimental investigation and comparison, which is based on actual testing of STHE and PHE. Both heat exchangers were designed and tested for a heat load of 6000 kcal/hr. In both types of heat exchangers, the primary working fluid used is Refrigerant R22 and secondary working fluid used is water. Theoretical analysis shows that PHE has a 9.67 % less heat transfer area than STHE. Experimental results show that overall heat transfer coefficient (OHTC) for PHE is higher than STHE by 30.96%. The paper also includes a comparison of the heat transfer rate (Q) of the two heat exchangers experimentally.

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