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Usability of NaNO2 for latent heat storage applications.
Authors: Oravová Lucie | Svoboda Roman
Year: 2009
Type of publication: článek v odborném periodiku
Name of source: Scientific Papers of the University of Pardubice, Series A, Faculty of Chemical Technology
Publisher name: Univerzita Pardubice
Place: Pardubice
Page from-to: 151-163
Titles:
Language Name Abstract Keywords
cze Využití NaNO2 pro akumulaci tepelné energie. Byla stanovena entalpie tání a tepelná kapacita NaNO2. Měření bylo provedeno v rozmezí teplot od 0-310 °C za použití dvou typů kalorimetrů. Teplota tání NaNO2 byla stanovena při 280.7 ? 0.2 °C a entalpie tání látky je 13.9 ? 0.2 kJ.mol-1. Teplotní stabilita byla studována za použití TG-DTA a DSC teplotních cyklů. Během tohoto testu bylo provedeno 300 teplotních cyklů zahrnující oblast tání NaNO2. V rámci testu byla stanovena entalpie tání, teplota tání a teplota krystalizace. dusitan sodný;látky s fázovou změnou;kalorimetrie
eng Usability of NaNO2 for latent heat storage applications. Enthalpy of fusion and heat capacity of NaNO2 were determined. The heat capacity measurements were performed in the temperature range 0 ? 310 °C by using two types of calorimeters. Melting point of NaNO2 was detected at 280.7 ? 0.2 °C and the corresponding heat of fusion was found to be 13.9 ? 0.2 kJ.mol-1. Thermal stability of the studied material was first investigated using simultaneous TG-DTA and was followed by DSC accelerated thermal cycle tests afterwards. During these tests 300 heating/cooling thermal cycles were performed through the melting region of NaNO2 ? enthalpies, onset and peak temperatures of fusion and crystallization were determined from these measurements. sodium nitrite;phase change materials;calorimetry