Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 158, Issue -, Pages 256-265Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2017.12.073
Keywords
Concrete blocks; Latent heat storage; Macroencapsulation; Phase change material; Thermal energy storage
Categories
Funding
- German Federal Ministry for Economic Affairs and Energy (AiF Project GmbH) [KF 2035766 ZG4]
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Most installed phase change materials in real applications are typically spherical microencapsulated paraffin. However, salt hydrates can be a cheap alternative when combined with a suitable macroencapsulation. Such macroencapsulation enables the installation of different shapes and positions within the building material. Therefore, an experiment setup consisting of a wooden box equipped with infrared radiators and a cooler was used to investigate cuboid, cylindrical, plate-shaped, and spherical phase-change packages. All water vapor impermeable packages filled with salt hydrate were positioned within a standard concrete block. As a result, it can be seen that changing the design of a PCM package enables the opportunity to adjust the thermal behavior without changing the mass of the PCM. For a high heat transfer, a set up position of a large number of thin packages with a large heat transfer surface was found to be the best design. Using a thermal shading effect and an even distribution of the PCM within concrete block ensures a slow increase in the temperature of the block and thus a lower heat flow into the inner rooms.
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