Document type
Conference papers
Document subtype
Abstract
Title
Thermophysical Properties of Fluids and Materials for Energy Applications. From Macro to Nano World
Participants in the publication
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Maria José V. Lourenço (Author)
Dep. Química e Bioquímica
CQE
Fernando J.V. Santos (Author)
Dep. Química e Bioquímica
CQE
Manuel Matos Lopes (Author)
Dep. Química e Bioquímica
Valentim Nunes (Author)
INSTITUTO POLITÉCNICO DE TOMAR
Summary
Thermophysics is the science and technology of the most important properties of materials. Thermophysical properties are all material properties affecting the transfer and storage of heat, that vary with the state variables temperature, pressure and composition, without altering the material's chemical identity. Thermophysical properties play an important role in several processes in the chemical, extraction and manufacturing industries, especially in those involving simultaneous heat and mass transfer. Most of the problems that affect our society need values of these properties to design and characterize new products and processes, to replace unacceptable processes and compounds and to optimize energy balances and efficiency[1]. To make good measurements of thermophysical properties, namely for high temperature applications[2], is difficult and time consuming and it is not fashionable not economically attractive for industries and funding agencies. The need for accurate data on thermophysical properties of fluids has been replaced to a certain extent by alternative methods of properties calculation, mostly based on computer simulation or prediction/estimation methodologies (cheaper, but risky). The Molecular Thermophysics and Fluid Technology Group of Centro de Química Estrutural is an international recognized group in Thermophysics of Fluids and Materials, with a strong experience on experimental measurement, modelling and correlation of thermophysical properties, designing equipment’s and sensors for fundamental and industrial applications. In the recent years most of this research was directed to cutting-edge research, which include ionic liquids, molten salts, nanomaterials and IoNanofluids and new engineering fluids. One of the main advantages of our know-how is the possibility of implement the cross fertilization of these research fields to resolve delicate problems, not only at a molecular level, but also in the possible industrial applications. Some examples of this research, patented when applicable, are: New spectrally selective coatings for solar paints; Development of new nano-based heat transfer fluids, making a solar collector and heat exchangers more energy efficient obeying to the environmental goals set by the World Energy Council [3,4]. Measuring viscosity of new molten salts and alloys for high-tech applications; Measuring thermal conductivity of humid air for high pressure turbines; Developing metal-film sensors for high temperature in situ measurements in incinerators. Science is fundamental to support technology developments, namely in the area of nanosystems, namely using nanomaterials (CNT’s, graphene, natural melanin) to enhance the thermal properties of base engineering fluids, which have to be measured by rigorous instrumental methods. In addition, the environmental and safety requirements on the use of nanomaterials and nanosystems require the development of a strategy for their production, use and disposal. The implementation of a regulatory framework, a driving force for nanotechnologies development is essential to its acceptance by society. A strategy to select a given nanofluid or IoNanofluid for a given application, bound by the environmental and safety regulatory frameworks was recently proposed[5]. This lecture will focus on the relevant points mentioned, illustrating our work, challenges, difficulties, successes and fails.\nReferences\n\n1. C.A. Nieto de Castro. Challenges for European science and technology – thermosphysics of fluids and nanosystems. Open Access Government, 2017, November, pp 218-219. https://www.openaccessgovernment.org/open-access-government-november-2017/39524/ .(Accessed May 4, 2022)\n2. C.A. Nieto de Castro, M.J.V. Lourenço. Towards the Correct Measurement of Thermal Conductivity of Ionic Melts and Nanofluids”, Energies 2020, 13 (1), 99(22). \n3. K. Massonne, S. Vieira, M.J. Lourenço, C. Nieto de Castro. Use of Melanin or Melanin Particles for Solar Thermal Energy Conversion. Patent Number EP 3 228 192 A2, 11 October 2017.\n4. F.E.B. Bioucas, S.I.C. Vieira, M.J.V. Lourenço, F.J.V. Santos, C. A. Nieto de Castro, “Performance of heat transfer fluids with nanographene in a pilot solar collector”, Solar Energy, 2018, 172, 171–176. \n5. Maria José Lourenço, João Alexandre, Charlotte Huisman, Xavier Paredes, Carlos Nieto de Castro, “The balance between energy, environmental security, and technical performance: the regulatory challenge of nanofluids”, Special Issue on Colloids and Nanofluids for Energy Management, Nanomaterials 2021, 11(8), 1871(22). Selected as a Featured Paper.
Editor(s)
International Association of Advanced Materials
Date of Publication
2022-06-27
Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Event
European Advanced Materials Congress, 25 June – 2 July, 2022
Publication Identifiers
Address
Genoa, Italy
Organizers
International Association of Advanced Materials
Notes
Carlos A. Nieto de Castro . Invited. Fellow Award Lecture (June 27)