Next Article in Journal
A Modified High Voltage Gain Quasi-Impedance Source Coupled Inductor Multilevel Inverter for Photovoltaic Application
Previous Article in Journal
Effects of Jet Induced by String-type Plasma Actuator on Flow Around Three-Dimensional Bluff Body and Drag Force
Article

Thermal Stability and Performance Testing of Oil-based CuO Nanofluids for Solar Thermal Applications

1
School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, China, 30 Puzhu South Rd, Pukou, Nanjing 211816, China
2
School of Mechanical and Manufacturing Engineering/School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Gate 14, Barker St., Kensington, Sydney, NSW 2052, Australia
3
Department of Design and Engineering, Staffordshire University, Stoke-On-Trent ST4 2DE, UK
*
Author to whom correspondence should be addressed.
Energies 2020, 13(4), 876; https://doi.org/10.3390/en13040876
Received: 15 January 2020 / Revised: 9 February 2020 / Accepted: 12 February 2020 / Published: 17 February 2020
(This article belongs to the Section State-of-the-Art Energy Related Technologies)
For solar thermal systems, nanofluids have been proposed as working fluids due to their enhanced optical and thermal properties. However, nanoparticles may agglomerate over time, heating and thermal cycles. Even though pristine nanofluids have proven to enhance performance in low-temperature applications, it is still unclear if nanofluids can meet the reliability requirements of solar thermal applications. For this aim, the present study conducted experiments with several formulations of oil-based CuO nanofluids in terms of their maximum operational temperatures and their stabilities upon cyclic heating. In the samples tested, the maximum temperature ranged from 80 to 150 °C, and the number of heating cycles ranged from 5 to 45, with heating times between 5 to 60 min. The results showed that heating temperature, heating cycles, and heating time all exacerbated agglomeration of samples. Following these experiments, orthogonal experiments were designed to improve the preparation process and the resultant thermal-impulse stability. Thermal properties of these samples were characterized, and thermal performance in an “on-sun” linear Fresnel solar collector was measured. All tests revealed that thermal performance of a solar collecting system could be enhanced with nanofluids, but thermal stability still needs to be further improved for industrial applications. View Full-Text
Keywords: oil-based CuO nanofluids; two-step preparing method; medium temperature; thermal impulse stability; orthogonal experiment oil-based CuO nanofluids; two-step preparing method; medium temperature; thermal impulse stability; orthogonal experiment
Show Figures

Figure 1

MDPI and ACS Style

Yang, M.; Wang, S.; Zhu, Y.; Taylor, R.A.; Moghimi, M.A.; Wang, Y. Thermal Stability and Performance Testing of Oil-based CuO Nanofluids for Solar Thermal Applications. Energies 2020, 13, 876. https://doi.org/10.3390/en13040876

AMA Style

Yang M, Wang S, Zhu Y, Taylor RA, Moghimi MA, Wang Y. Thermal Stability and Performance Testing of Oil-based CuO Nanofluids for Solar Thermal Applications. Energies. 2020; 13(4):876. https://doi.org/10.3390/en13040876

Chicago/Turabian Style

Yang, Moucun; Wang, Sa; Zhu, Yuezhao; Taylor, Robert A.; Moghimi, M.A.; Wang, Yinfeng. 2020. "Thermal Stability and Performance Testing of Oil-based CuO Nanofluids for Solar Thermal Applications" Energies 13, no. 4: 876. https://doi.org/10.3390/en13040876

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop