ICESW 2020: Facilitator Suggests Optimisation of Geometric, Flow Parameters for Optimal Performance
There should be an optimisation of geometric and flow parameters for optimal performance, and optimisation for other geometric shapes to produce microchannel heat sinks with optimal thermal characteristics, according to Professor Tunde Bello-Ochende of the University of Cape Town, South Africa.
He made this submission on Tuesday, August 11, 2020, at the opening plenary of the 4th International Conference on Engineering for a Sustainable World (ICESW), where he made a presentation titled 'Optimal Design of Subcooled Microchannel Heat Sinks with Variable Heat Inputs'.
While speaking at the virtual event organised and hosted by the Department of Mechanical Engineering of Covenant University, Professor Bello-Ochende, who was the first Keynote Speaker, revealed the motivation behind the Optimal Design of Subcooled Microchannel Heat Sinks with Variable Heat Inputs. "The motivation was because air cooling of microelectronics had reached its limit. The single-phase cooling could not handle high heat flux removal from modern electronic devices, and subcooled flow boiling in microchannels was a viable option for high heat flux removal from electronic devices," he stated.
In his conclusions, Professor Bello-Ochende said that optimal geometric and flow parameters were products of optimisation. He asserted that subcooled flow boiling (Two-phase flow) could be used for high heat flux removal from microchannel heat sinks, and cooling with the two-phase flow in the microchannel was better than single-phase flow. Also, he concluded that the pumping power requirements for two-phase flow were better than single-phase flow at low Reynolds numbers, amongst others.
The second Keynote Speaker, Dr Thomas Malwela of the Council for Scientific and Industrial Research, South Africa, introduced to conference participants the equipment available at the Materials Characterisation, Testing and Analytical Facility (MCTAF) in the southern Africa country.
The MCTAF, he said, was a non-profit driven multi-user, public instrumentation facility for materials research enabling inquiry into samples of all forms and sizes at a molecular level. According to Dr Malwela, the facility housed advanced equipment and capabilities for comprehensive analysis of a wide range of functional materials as well as polymer testing, significantly funded by the Department of Science and Innovation (DSI).
He added that the MCTAF offered state-of-the-art characterisation facilities services to the South African community, including academia, industries and national laboratories or institutions. Some of the equipment at the facility, he noted, were microscopes, SPM instruments, x-ray instruments, thermal instruments, and optical instruments, all with characterisation and testing capabilities.
Earlier in his welcome remarks, the Vice-Chancellor of Covenant University, Professor AAA. Atayero noted that humanity was overstretching the capacity of the earth to provide the varied resources used and to contain environmental pollutants from human activities. He stated that acknowledging the need to live within the constraints of the earth's limited resources and to ensure more equitable access to the limited resources by all, was at the heart of the concepts of sustainability and sustainable development.
Professor Atayero affirmed that the roles of engineering and engineers in the sustainable development efforts were recognised globally. He said that the task to contain the adverse environmental and social features of engineered products, services and infrastructure and considerably improve their compliance with the sustainable environmental requirement, was vital and urgent.
Covenant University, he stated, was actively involved in research efforts aimed at evolving innovative solutions in facilitating the achievement of African Union agenda 2063 and the Sustainable Development Goals. He added that the recent ranking of the University in the 401-600 bracket of the 2020 Impact Ranking of Times Higher Education (THE), attested to Covenant's contributions in this direction.
The ICESW 2020 conference with the theme ‘Engineering for a Sustainable World’ was scheduled to hold from August 10-14, 2020.
Professor Tunde Bello-Ochende of the University of Cape Town
Dr Thomas Malwela of the Council for Scientific and Industrial Research, South Africa