Muovitechilla on nyt tohtori

Adib Kalantar on saanut väitöskirjansa valmiiksi, ja väitöstilaisuus on ohi.

Muovitechilla on nyt tohtori

Paljon onnea, Adib!
Adib puolusti väitöstään ja voi nyt kutsua itseään tohtoriksi (PhD).

Opponentteina toimivat Åbo Akademin Carl-Eric Wilen, Borealis-yhtiön Thomas Hjertberg, Chalmersin yliopiston Christian Müller sekä Ruotsin teknisen tutkimuslaitoksen RISE:n Anna Jansson.

Väitöskirjassa kuvataan uuden termoplastisen komposiitin kehitys pienemmän lämpövastuksen saavuttamiseksi. Lämpövastus vaikuttaa lämmönvaihtimen ja kalliomassan välillä siirrettävään maksimaaliseen lämpövirtaan. Lue lisää alta.

Yhteystiedot väitöskirjaan tutustumista varten
R&D Manager - MuoviTech International Group
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Thermally conductive high-density polyethylene composites for ground heat exchangers.

Different countries have ambitious goals for energy and climate change adaptation and mitigation, aiming for more efficient energy and highest renewable energy generation. A rational approach might be transferring the buildings from being an energy waster to being highly energy efficient and an energy producer on site.

Geothermal energy has a unique position among the renewable energy resources. In fact, we live right on top of the most affordable, sustainable and comfortable energy source on earth thanks to earth’s relatively constant underground temperature. Therefore ground can be used as a heat source during the winter and as a heat sink during the summer. In order to capture or dissipate heat from or into the ground, an underground heat exchanger (GHE) is installed. GHEs material and standards borrowed from water pipe application, where high density polyethylene (HDPE) is mostly used in this technology. However, HDPE has a low thermal conductivity which makes negative effects on the performance of the system.

This thesis describes the development of a novel thermoplastic composite, to have lower thermal resistance that affects the maximum heat flow exchanged between the GHE and the rock mass. HDPE composites reinforced with inorganic fillers and their properties were investigated focusing on determining the properties of composites in terms of the thermo-physical, mechanical, and morphological properties. The very positive finding is that the addition of talc particulates, not only improved the thermal conductivity and thermal diffusivity of the composites, but it also simultaneously increased the properties of the composites regarding stiffness and impact resistance. It is presented that the thermal stability enhanced, while the oxidation induction time decreased in cooperation with the talc.


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