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Abstract <p>Phase-change heat storage materials (PCMs) based on Zn(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O, which undergoes phase transition in the range 25–40°C, were developed. The most stable composition was the one comprised of Zn(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O/Co(NO<sub>3</sub>)<sub>2</sub>·6H<sub>2</sub>O/expanded graphite/CMC. Its heat of crystallization with account for the heat capacity in the supercooled region was determined as 146.0 ± 7.3 and 140.6 ± 7.0 J/g and was comparable with the heats of melting before and after 500 thermal cycling cycles, equal to 147.4 ± 4.4 and 130.6 ± 3.9 J/g, respectively. The composition tested in a prototype electric underfloor heating film showed that the energy consumption for heating was 67% lower than for the heating film without the developed material.</p>

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Thermal Stability and Physicochemical Properties of Zn(NO3)2·6H2O-Based Heat Storage Materials

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • D. S. Testov,
  • S. V. Morzhukhina,
  • A. M. Morzhukhin,
  • Yu. E. Lugovoy,
  • D. A. Kulida,
  • K. I. Stepanyuk,
  • N. O. Il’ina,
  • G. V. Kiryukhina

摘要

Abstract

Phase-change heat storage materials (PCMs) based on Zn(NO3)2·6H2O, which undergoes phase transition in the range 25–40°C, were developed. The most stable composition was the one comprised of Zn(NO3)2·6H2O/Co(NO3)2·6H2O/expanded graphite/CMC. Its heat of crystallization with account for the heat capacity in the supercooled region was determined as 146.0 ± 7.3 and 140.6 ± 7.0 J/g and was comparable with the heats of melting before and after 500 thermal cycling cycles, equal to 147.4 ± 4.4 and 130.6 ± 3.9 J/g, respectively. The composition tested in a prototype electric underfloor heating film showed that the energy consumption for heating was 67% lower than for the heating film without the developed material.