TY - JOUR
T1 - Characteristics of carbon-based nanofluids and their application in a brazed plate heat exchanger under laminar flow
AU - Teng, Tun Ping
AU - Hsiao, Ting Chiang
AU - Chung, Chun Chi
N1 - Funding Information:
The authors would like to thank the Ministry of Science and Technology of Republic of China (Taiwan) for their financial support to this research under Contract no. MOST 104-2221-E-003-019-MY2 and MOST 106-2221-E-003-021-MY3.
Funding Information:
The authors would like to thank the Ministry of Science and Technology of Republic of China (Taiwan) for their financial support to this research under Contract no. MOST 104-2221-E-003-019-MY2 and MOST 106-2221-E-003-021-MY3 . Appendix A
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/1/5
Y1 - 2019/1/5
N2 - In this study, a graphite-powder-based heating and cooling processing method (GP-HCPM) was used to produce carbon-based nanofluids (CBNFs) as working fluid for a brazed plate heat exchanger (BPHE) system. Sodium dodecyl benzenesulfonate (SDBS) was added to CBNFs as a dispersant to enhance their stability, and the CBNF concentration was adjusted to 0.2 wt% (S1) and 0.6 wt% (S2). The thermal conductivity, viscosity, density, specific heat, and contact angle of the CBNFs were measured and analyzed. Finally, the CBNFs were tested in a BPHE system to evaluate the average heat exchange capacity (Q̇ex,avg), pumping power consumption (Pp), and system efficiency factor (SEF) under various temperatures (35, 40, and 45 °C) and laminar flow conditions. Results show that the Q̇ex,avg of S1 and S2 was higher than water under all experimental parameters, indicating that CBNFs exhibit a higher heat exchange performance than water. The Pp of S1 was slightly lower than that of water. The maximum Q̇ex,avg and SEF enhancement ratio of S1 and S2 was 7.54% and 7.98% and 9.19% and 7.28%, respectively. Considering the overall system efficiency of experimental parameters of the BPHE system, S1 was deemed more suitable than S2.
AB - In this study, a graphite-powder-based heating and cooling processing method (GP-HCPM) was used to produce carbon-based nanofluids (CBNFs) as working fluid for a brazed plate heat exchanger (BPHE) system. Sodium dodecyl benzenesulfonate (SDBS) was added to CBNFs as a dispersant to enhance their stability, and the CBNF concentration was adjusted to 0.2 wt% (S1) and 0.6 wt% (S2). The thermal conductivity, viscosity, density, specific heat, and contact angle of the CBNFs were measured and analyzed. Finally, the CBNFs were tested in a BPHE system to evaluate the average heat exchange capacity (Q̇ex,avg), pumping power consumption (Pp), and system efficiency factor (SEF) under various temperatures (35, 40, and 45 °C) and laminar flow conditions. Results show that the Q̇ex,avg of S1 and S2 was higher than water under all experimental parameters, indicating that CBNFs exhibit a higher heat exchange performance than water. The Pp of S1 was slightly lower than that of water. The maximum Q̇ex,avg and SEF enhancement ratio of S1 and S2 was 7.54% and 7.98% and 9.19% and 7.28%, respectively. Considering the overall system efficiency of experimental parameters of the BPHE system, S1 was deemed more suitable than S2.
KW - Average heat exchange capacity
KW - Brazed plate heat exchanger (BPHE)
KW - Carbon-based nanofluids (CBNFs)
KW - Graphite-powder-based heating and cooling processing method (GP-HCPM)
KW - System efficiency factor (SEF)
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U2 - 10.1016/j.applthermaleng.2018.09.125
DO - 10.1016/j.applthermaleng.2018.09.125
M3 - Article
AN - SCOPUS:85054175307
SN - 1359-4311
VL - 146
SP - 160
EP - 168
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
ER -