Design of phase change materials based on salt hydrates for thermal energy storage in a range of 4–40 °C

• Published in: Journal of thermal analysis and calorimetry 2020-03, Vol.139 (6), p.3701-3710
• Main Authors: Lovera-Copa, Jorge A., Ushak, Svetlana, Reinaga, Nicole, Villalobos, Islaman, Martínez, Franklin R.
• Format: Article
• Language: English
• Subjects: Air conditioners; Air conditioning; Ammonium nitrate; Analysis; Analytical Chemistry; Calcium nitrate; Chemistry; Chemistry and Materials Science; Commercial buildings; Computer simulation; Energy storage; Eutectic composition; Eutectic temperature; Force and energy; Heat storage; Hydrates; Inorganic Chemistry; Lithium; Magnesium; Manganese; Measurement Science and Instrumentation; Parameter estimation; Phase change materials; Physical Chemistry; Polymer Sciences; Product development; Quaternary systems; Refrigeration; Ternary systems; Thermal energy; Thermodynamic models; Thermodynamic properties; Thermodynamics
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-019-08655-1

Melting temperatures and eutectic mixture compositions of LiNO 3 –LiClO 4 –H 2 O, NaNO 3 –Ca(NO 3 ) 2 –H 2 O and NH 4 NO 3 –Mn(NO 3 ) 2 –Mg(NO 3 ) 2 –H 2 O systems were predicted using the modified Brunauer, Emmett and Teller (BET) thermodynamic model. For the ternary system with calcium nitrate and for the quaternary system, it was necessary to estimate the Ω ij mixing parameters with solid–liquid equilibrium data, which quantify the interaction between the compounds NaNO 3 –Ca(NO 3 ) 2 and NH 4 NO 3 –Mn(NO 3 ) 2 , respectively. The results calculated with the modified BET thermodynamic model show melting temperatures of 28.3 °C and 27.0 °C for the system with lithium perchlorate, 33.2 °C for the system with calcium nitrate and 4.0 °C for the quaternary system. Calculated values were tested experimentally with the T-history method for the LiNO 3 –LiClO 4 –H 2 O and NH 4 NO 3 –Mn(NO 3 ) 2 –Mg(NO 3 ) 2 –H 2 O systems and with the DSC method for the NaNO 3 –Ca(NO 3 ) 2 –H 2 O system. The experimental results of eutectic mixtures predicted in this work present a good thermal behavior and can be useful as phase change materials (PCM) for their application in the design and simulation of refrigeration and air conditioning systems in residential and commercial buildings. Graphic abstract