Development and application of organic phase change mixtures in thermal storage gypsum wallboard

• Published in: Solar energy materials and solar cells Vol. 36; no. 2; pp. 147 - 157
• Main Authors: Feldman, D., Banu, D., Hawes, D.W.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-02-1995; Elsevier
• Subjects: Applied sciences; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Heating, air conditioning and ventilation; Technical data: comfort, insulation, loads, etc; Transport and storage of energy; Air conditioning; Impregnation; Experimental result; Hot climate; Phase change; Cold storage; Performance; Outside wall; Energy storage
• ISSN: 0927-0248; 1879-3398
• DOI: 10.1016/0927-0248(94)00168-R

A latent heat storage material which would be useful in hot climate is proposed. It is a mixture of 93–95 wt% commercial Methyl Palmitate (MeP) with 7-5 wt% commercial Methyl Stearate (MeS), having a melting-freezing interval of approximately 23–26.5°C and a latent heat of transition of at least 180 kJ/kg.
Normal wallboard may be impregnated with up to 25 wt% of one of these mixtures. Air passing over such an impregnated wallboard would be cooled down due to the heat absorption taking place between 23–26.5°C when the mixture melts. Recharging the wallboard will occur at 22–23°C during freezing, when the latent stored heat is released to the cool night air.
The total storage capacity of such an impregnated wallboard, in a 3.5°C temperature interval, is at least twelve times higher than the storage capacity of wallboard alone over this range.