DSC study of technical grade phase change heat storage materials for solar heating applications
- Univ. of Leeds (United Kingdom). Dept. of Fuel and Energy
Differential scanning calorimetry (DSC) was used to investigate the behavior of storage materials that undergo solid-liquid phase transitions. Heating scans were used to measure the enthalpy that can be stored and cooling scans were used to estimate the magnitude of the enthalpy that may be recovered from the storage material. The automatic and rapid thermal cycling features of the DSC system were used to study thermal decomposition that may arise from the daily duty cycle of the storage medium. In this study, DSC methods were applied to technical grade paraffin wax, calcium chloride hexahydrate and disodium hydrogen phosphate dodecahydrate. In the case of inorganic salt hydrates, DSC measurements showed a decrease in heat of fusion; thermal cycling and thermograms revealed considerable super cooling. This would lead to a reduction in storage capacity. On the other hand paraffin wax did not supercool nor were there any indications that thermal cycling or contact with metal could degrade its thermal performance.
- OSTI ID:
- 116240
- Report Number(s):
- CONF-950336-; ISBN 0-7918-1300-2; TRN: IM9545%%207
- Resource Relation:
- Conference: American Society of Mechanical Engineers/Japanese Society of Mechanical Engineers/Japan Solar Energy Society international solar energy conference, Lahaina, HI (United States), 19-24 Mar 1995; Other Information: PBD: 1995; Related Information: Is Part Of Solar engineering 1995: Proceedings. Volume 2; Stine, W.B. [ed.] [California Polytechnic Univ., Pomona, CA (United States)]; Tanaka, Tadayoshi [ed.] [Electrotechnical Lab., Ibaraki (Japan)]; Claridge, D.E. [ed.] [Texas A and M Univ., College Station, TX (United States)]; PB: 582 p.
- Country of Publication:
- United States
- Language:
- English
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