Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
672885 | Thermochimica Acta | 2015 | 11 Pages |
Abstract
In large latent heat storages based with the phase change material (PCM) being a salt hydrate, it is difficult to assure the stoichiometrically correct hydrate concentration of the salt hydrate. In this study the impact of the concentration of CaBr2 + H2O in a concentration range of about 2.6 wt% around the congruent melting CaBr2·6H2O on the melting enthalpy and the maximum storage capacity is exemplary investigated via differential scanning calorimetry (DSC) and via a model. The melting enthalpy of CaBr2·6H2O is found to be 142.1 J gâ1, which is significantly larger than the value indicated in literature (115.5 J gâ1). For a CaBr2 concentration around 0.8 wt% lower than the concentration of CaBr2·6H2O, a decrease of over 17% is found for both the melting enthalpy and the maximum storage capacity. A good agreement is found for the maximum storage capacity between the experimentally determined values and the values determined by the model.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Henri Schmit, Simon Pöllinger, Werner Pfeffer, Stefan Hiebler,