BIBLIOS

Document type
Conference papers

Document subtype
Abstract

Title
Solar thermal energy between nano and nature

Participants in the publication
Salomé I. Vieira (Author)
Dep. Química e Bioquímica
Maria José Lourenço (Author)
Dep. Química e Bioquímica
CQE
Carlos Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Joerg Mueller (Author)

Summary
About 90% of the investment made in energy efficiency until 2035 (≈ € 5.3 billion) will be for the transport and construction sectors, to adapt the infrastructures to future needs. Europe, North America and China will be the regions whose markets have higher expression in these sectors and where most of the investment will be [1]. Renewable energies have a great significance in this scenario. Factors such as energy import, geographic and energy sources diversification influence the organization of industry and private consumers. The challenge of implementation of renewable energy in buildings, transport and industry network isn’t mainly in its technical difficulty, but primarily on the change of mentality by institutions, business models, finance, professional practices, education and policies adopted.\nBetween the renewables, solar thermal is one of the most versatile, reliable and flexible energies. Solar radiation is converted into heat and can be used for a wide range of temperatures (45-4000°C) [2]. To increase its efficiency at low cost, paint coatings can be used as spectrally selective surfaces that will increase the amount of UV-Vis radiation absorbed and as protection against corrosion, chemical attacks, etc. To comply with the environmental policies to decrease the amount of VOC’s, waterborne paints are heavily recommended. The pigments used in paints provide color, hiding power and influence properties such as durability, resistance to abrasion and corrosion. They are also responsible for radiation absorbance of materials. In this work we used synthetic and natural alternatives: carbon nanotubes and berries of an invasive plant (Phytolacca americana) which is naturalized almost worldwide.\nWe used a ceramic panel prototype instead of the materials commonly present in solar collectors (metals, polymers, glass, etc). The commercial solar collectors have some impediments to their wider acceptance: high cost (materials and manufacturing), lifetime < 20 years, uncertainty of metal prices, and obtaining good thermal and mechanical bonds between different materials. A ceramic panel would allow an equipment that can challenge all these obstacles, with the drawback of obtaining thermal conductivities comparable to copper and aluminum.

Editor(s)
Professor Yuji Nagasaka


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Event
ATPC 2016, 2-6 October, 2016

Publication Identifiers

Organizers
Keio University, Japan

Publisher
Keio University, Japan

Collection
Abstract Book



Document Identifiers
URL - http://www.atpc2016.org/program/pdf/OS11-01.pdf

Keywords
Solar thermal energy Spectral absorption Phytolacca americana Prototype