Experimental study on the thermal conductivity of water-based CNT-SiO2 hybrid nanofluids

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Dalkılıç A.S., Yalçın G., Küçükyıldırım B.O., Öztuna S., Akdoğan Eker A., Jumpholkul C., Nakkaew S., Wongwises S.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2018

วารสาร: International Communications in Heat and Mass Transfer (0735-1933)

Volume number: 99

หน้าแรก: 18

หน้าสุดท้าย: 25

จำนวนหน้า: 8

นอก: 0735-1933

eISSN: 1879-0178

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056197198&doi=10.1016%2fj.icheatmasstransfer.2018.10.002&partnerID=40&md5=2bdf3a09246d41577ec3fecf67ce0a5e

ภาษา: English-Great Britain (EN-GB)

ดูในเว็บของวิทยาศาสตร์ | ดูบนเว็บไซต์ของสำนักพิมพ์ | บทความในเว็บของวิทยาศาสตร์

บทคัดย่อ

This experimental study includes measurement of thermal conductivity of distilled water-based CNT-SiO2 hybrid nanofluids. Nanofluids were prepared by using two-step method, 3 different concentrations and 4 different mass range of CNT-SiO2. SiO2 has 2200 kg m−3 density, 1.4 W m−1 K−1 thermal conductivity and 7 nm average particle size. CNT has 2620 kg m−3 density, 25 W m−1 K−1 thermal conductivity and 6–10 nm average particle size. Samples were placed in ultrasonic homogenizer maximum power capacity for 3 h. Throughout sonication process temperature of nanofluids have been kept under control in order not to chance volumetric fraction of nanofluids. All measurements of thermal conductivity were done by using thermal conductivity meter. Thermal conductivity meter was calibrated by di-water. Measurements of thermal conductivity was done range from 25 °C to 60 °C for every 5 °C. Validation of measurements had been performed by using di-water and shown in a thermal conductivity-temperature figure. Minimum and maximum thermal conductivity enhancements were revealed in detail. Alteration of the thermal conductivity with temperature according to various volumetric fractions were in literature rated and it is found that the thermal conductivity increases with temperature and vol. fraction clearly. Enhancement on the thermal conductivity to di-water were also depicted for various temperatures and vol. fraction in figures. Almost well-known correlations in the literature were given with their predictable rates. Moreover, comparisons with other studies were provided in this present study. A practical correlation was proposed for other researchers. © 2018 Elsevier Ltd

คำสำคัญ

Hybrid nanofluids, Ultrasonic homogenizer