THERMAL STABILITY AND PHYSICO CHEMICAL PROPERTIES OF PHASE CHANGE MATERIALS BASED ON Zn(NO3)2 · 6H2O

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Abstract

The research on the development of heat storage materials based on Zn(NO3)2 · 6H2O with a phase transition in 25–40°C. It was established that the most stable composition is the one containing Zn(NO3)2 · 6H2O/Co(NO3)2 · 6H2O/expanded graphite/CMC. Its crystallization heat is determined taking into account the contribution of heat capacity in the supercooled region before and after 500 cycles of thermal cycling. Its value is 146.0 ± 7.3 and 140.6 ± 7.01/g and is comparable with the corresponding heats of fusion of 147.4 ± 4.4 and 130.6 ± 3.91/g. The composition of Zn(NO3)2 · 6H2O/Co(NO3)2 · 6H2O/expanded graphite/CMC was investigated in a pilot sample of an electric underfloor heating system. It was found that the energy consumption for heating the heating film with material was reduced by 67% compared to the heating film without material.

About the authors

D. S Testov

Dubna State University

Email: dima13-1994@yandex.ru
Dubna, 141982 Russia

S. V Morzhukhina

Dubna State University

Email: dima13-1994@yandex.ru
Dubna, 141982 Russia

A. M Morzhukhin

Dubna State University

Email: dima13-1994@yandex.ru
Dubna, 141982 Russia

Y. E Lugovoy

Dubna State University

Email: dima13-1994@yandex.ru
Dubna, 141982 Russia

D. A Kulida

Dubna State University

Email: dima13-1994@yandex.ru
Dubna, 141982 Russia

K. I Stepanyuk

Dubna State University

Email: dima13-1994@yandex.ru
Dubna, 141982 Russia

N. O Ilina

Dubna State University

Email: dima13-1994@yandex.ru
Dubna, 141982 Russia

G. V Kiryukhina

Moscow State University; Korzhinsky Institute of Experimental Mineralogy, Russian Academy of Sciences

Author for correspondence.
Email: dima13-1994@yandex.ru
Moscow, 119991 Russia; Chernogolovka, 142432 Russia

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