Abstract
In the objective to define passive components for the light envelope of buildings, different types of wallboards containing a phase change material (PCM) were studied. The high storage capacity should enable the overall thickness of wallboards to be less than 5 cm. To lower the investment costs, the wallboards were made from commercial panels after a first attempt of using gypsum walls. Three types of wallboards were studied: (i) a polycarbonate panel filled with paraffin granulates; (ii) a polycarbonate panel filled with polyethylene glycol PEG 600; (iii) a PVC panel filled with PEG 600 and coupled to a VIP. An experimental set-up was built to determine the thermal response of these wallboards to thermal solicitations. Experimental results were compared to those obtained by a numerical simulation in which an apparent heat capacity method was used. The final results show that the last studied wallboard could be used in the test cells under construction and then validate the concept.
Highlights
Thermal storage is an attractive way to manage thermal energy
This paper describes part of the first two steps of the study and aims to compare the use of several kinds of phase change material (PCM) with different packaging to make a choice
Subscripts e external, outdoor i internal, indoor l liquid m mixture se outdoor surface si indoor surface s solid granulates containing paraffin are incorporated; (ii) a wallboard constituted of polycarbonate panels filled with same granulates; (iii) a wallboard made of polyvinyl chloride (PVC) panels filled with polyethylene glycol (PEG)
Summary
Thermal storage is an attractive way to manage thermal energy. It allows production to be adapted to needs and creates favourable conditions by realising a constant relationship between required and available energy. These values must have smallest variations in space, from side to side of a room and from a room to the other and as a function of time during the whole day or from a season to the following For these reasons, the houses with very thick walls are found, especially comfortable, cold in summer and hot in winter, due to their capacity to store thermal energy under the form of sensible heat. Subscripts e external, outdoor i internal, indoor l liquid m mixture se outdoor surface si indoor surface s solid granulates containing paraffin are incorporated; (ii) a wallboard constituted of polycarbonate panels filled with same granulates; (iii) a wallboard made of polyvinyl chloride (PVC) panels filled with polyethylene glycol (PEG) Parallel to this experimental work, a numerical study was carried out to investigate properties and possible configurations of wallboards containing gypsum, PCMs and insulating materials. In the case of a solid–liquid phase change, the two following situations can be found according to the mode of incorporation and the type of the PCM
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