TY - JOUR
T1 - Numerical studies on thermal hydraulic performance of zigzag-type printed circuit heat exchanger with inserted straight channels
AU - Lee, Seung Yeob
AU - Park, Bo Guen
AU - Chung, Jin Taek
N1 - Funding Information:
This work was supported by a grant from the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), funded by the Korea government Ministry of Trade, Industry & Energy (No. 20144010200770).
Publisher Copyright:
© 2017 Elsevier Ltd
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - The printed circuit heat exchanger (PCHE) can include one of many channel types, such as zigzag and wavy channels. Among these channels, the zigzag channel is the most frequently used regarding the conventional-type PCHE due to its high durability and manufacturability; however, the zigzag channel has a high pressure loss due to the flow separation and the reverse flow at the bending point. To improve the performance of the zigzag-type PCHE, a new type of PCHE with inserted straight channels is suggested. A three-dimensional numerical analysis using CFD ANSYS-CFX code is conducted with respect to the thermal-hydraulic performance of a zigzag-type PCHE with inserted straight channels. The effects of the inserted straight channels on the heat transfer and the pressure drop in terms of the mass-flow rate are revealed. The lengths of the inserted straight channels vary between 0.5 and 2 mm, and the mass-flow rate is applied from 1.41 × 10−4 to 2.48 × 10−4 kg/s. The pressure drops of the 0.5 mm and 1 mm straight channels are less than that of the zigzag channel, and are similar to that of the wavy channel. In terms of the heat transfer characteristics, the results show that the heat transfer characteristics of the 0.5 mm and 1 mm straight channels are quite similar to those of the zigzag channel, but are better than those of the wavy channel. In the case of the 1 mm straight channel, the value of the volume-goodness factor is improved by about 26–28% compared to that of the original zigzag channel.
AB - The printed circuit heat exchanger (PCHE) can include one of many channel types, such as zigzag and wavy channels. Among these channels, the zigzag channel is the most frequently used regarding the conventional-type PCHE due to its high durability and manufacturability; however, the zigzag channel has a high pressure loss due to the flow separation and the reverse flow at the bending point. To improve the performance of the zigzag-type PCHE, a new type of PCHE with inserted straight channels is suggested. A three-dimensional numerical analysis using CFD ANSYS-CFX code is conducted with respect to the thermal-hydraulic performance of a zigzag-type PCHE with inserted straight channels. The effects of the inserted straight channels on the heat transfer and the pressure drop in terms of the mass-flow rate are revealed. The lengths of the inserted straight channels vary between 0.5 and 2 mm, and the mass-flow rate is applied from 1.41 × 10−4 to 2.48 × 10−4 kg/s. The pressure drops of the 0.5 mm and 1 mm straight channels are less than that of the zigzag channel, and are similar to that of the wavy channel. In terms of the heat transfer characteristics, the results show that the heat transfer characteristics of the 0.5 mm and 1 mm straight channels are quite similar to those of the zigzag channel, but are better than those of the wavy channel. In the case of the 1 mm straight channel, the value of the volume-goodness factor is improved by about 26–28% compared to that of the original zigzag channel.
KW - Heat transfer
KW - Numerical analysis
KW - Pressure loss
KW - Printed circuit heat exchanger
KW - Thermal-hydraulic performance
KW - Zigzag channel
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U2 - 10.1016/j.applthermaleng.2017.05.198
DO - 10.1016/j.applthermaleng.2017.05.198
M3 - Article
AN - SCOPUS:85020239920
SN - 1359-4311
VL - 123
SP - 1434
EP - 1443
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
ER -