Slide 1.pngSlide 2.pngSlide 3.pngSlide 4.pngSlide 5.pngSlide 6.png

Pr. Alina Adriana Minea

Technical University “Gheorghe Asachi” from Iasi, Romania

Director of Council of Coordination of Doctoral Studies in Faculty of Materials Science and Engineering

 

Talk Title
A perspective on new nanoparticle enhanced heat transfer fluids and their applications in solar energy systems

Talk Abstract
 

The high negative impact of human actions on the environment receives remarkable attention, especially on the increased global changes. Thus, clean and sustainable energy sources need to be considered and promptly developed. Solar energy is considered as one of the best candidates, which directly converts solar energy into electricity and heat without harming the environment and reducing the greenhouse gas emissions. However, inherently low thermal conductivity of the conventional heat transfer fluids is a primary limitation in developing energy-efficient systems. In this idea, a new heat transfer fluid can be engineered with the help of modern nanotechnology that can produce different nanoparticles (metallic/nonmetallic, carbon or silicon based). Nanomaterials, with unique mechanical, optical, electrical, magnetic, and thermal properties, can be added in certain conditions to basic fluids in order to improve their characteristics. Thus, nanoparticle enhanced fluids (nanofluids) were firstly developed by suspending nanoparticles in traditional heat transfer fluids such as water, oil, and ethylene glycol or even ionic liquids. Studies in this field indicate that exploiting nanofluid in solar systems offers unique advantages over conventional fluids. The purpose of this research is to investigate the recent advances in the nanofluids’ applications in solar energy systems by means of experimental and numerical work. Some debate in the literature relating to anomalous augmentation in nanofluids thermophysical properties is also discussed in regard to performed experimental and numerical work. In spite of some inconsistent reports—mainly due to the underprovided understanding of the involved mechanisms—nanofluids have been developed as a very good heat transfer fluid, especially in heat exchangers. Lately, hybrid nanofluids were defined as a new class of nanofluids with possible applications in almost all the fields of heat transfer. This is mainly because of the synergistic effect through which they provide promising properties of all of its constituents. Summarizing, this research start point is the manufacture of two hybrid nanofluids (i.e. water based, with addition of alumina, silica and titania nanoparticles) followed by a deep experimental study of their thermophysical properties and stability. Further on, all the experimental results were introduced in a numerical analysis to outline the advantages of the new nanoparticle enhanced fluid on a solar collector efficiency if compares to conventional heat transfer fluids. Results showed an increased solar collector efficiency depending on the Reynolds number as well as on the nanoparticles type. Nevertheless, a lot of research is still required to overcome the barriers in implementing these new nanoparticle enhanced fluids in solar energy area and to confidently increase the technology readiness level (TRL) from existing TRL 3-4 (concept formulated and mostly validated in the lab) to validation in the relevant environment (TRL 5). Targeted audience can be identified as doctoral students, post-docs and researchers in the area of new fluids and applied energy as well as companies from solar energy.

Short Biography
 

Prof.dr.habil. Alina Adriana Minea is full professor at Technical University “Gheorghe Asachi” Iasi and from 2013 has habilitation in materials engineering area, with a thesis on Heat Transfer Enhancement for Reducing Energy Consumptions. Her major field of research is heat and mass transfer mostly with applications in new heat transfer fluids and energy efficiency. Other research interests include nanofluids, ionanofluids, heat transfer, heat exchangers, energy and cooling technologies, solar energy. She published over 120 articles and authored or co-authored 21 books, most of them in heat transfer area and new fluids. The latest book was published in 2017 at CRC Press Taylor and Francis: Advances in New Heat Transfer Fluids: From Numerical to Experimental Techniques. She currently serves as member of the Editorial Board for Thermal Science Journal as well as for other international journals. She participates in peer review for many international journals and conferences, as well as for Horizon2020, international and national grants.

Dr. Minea is a member in Eumat international organization, as well as in AGIR national society, International Network of Women in Engineering Sciences (INWES International) and ASME International. She received many awards with one of her patents: “Procedure for Heat transfer efficiency in classical electrical furnaces used for medium temperature heat treatment” and received two times the prize of Best Reviewer for journal Applied Energy (Elsevier). Plus, in 2016 received the Best Researcher prize at Technical University “Gheorghe Asachi” from Iasi.

Over the years she was principal investigator for 6 research grants and participated in over 20 national/international grants. Currently, she is the Dissemination manager for COST action NANOUPTAKE (Overcoming Barriers to Nanofluids Market Uptake).

 
Talk Keywords
Heat transfer, Nanofluids, Solar energy.
 
Target Audience
Students, Post doctoral, Industry, Doctors and professors
 
Speaker-intro video
TBA 
 

The International Conference on Innovative Applied Energy (IAPE’18)