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The article deals with the experimental and numerical thermal-flow behaviours of a low-temperature Phase Change Material (PCM) used in Thermal Energy Storage (TES) industrial applications. The investigated PCM is a composition that consists of a mixture of paraffin wax capsuled in a melamine-formaldehyde membrane and water, for which a phase change process occurs within the temperature range of 4 ∘C to 6 ∘C and the maximum heat storage capacity is equal to 72 kJ/kg. To test the TES capabilities of the PCM for operating conditions close to real ones, a series of experimental tests were performed on cylindrical modules with fixed heights of 250 mm and different outer diameters of 15, 22, and 28 mm, respectively. The module was tested in a specially designed wind tunnel where the Reynolds numbers of between 15,250 to 52,750 were achieved. In addition, a mathematical model of the analysed processes, based on the enthalpy porosity method, was proposed and validated. The temperature changes during the phase transitions that were obtained from the numerical analyses in comparison with the experimental results have not exceeded 20% of the relative error for the phase change region and no more than 10% for the rest. Additionally, the PCM was examined while using a Scanning Electron Microscope (SEM), which indicated no changes in the internal structure during phase transitions and a homogeneous structure, regardless of the tested temperature ranges.
Agnieszka Ochman; Wei-Qin Chen; Przemysław Błasiak; Michał Pomorski; Sławomir Pietrowicz. The Use of Capsuled Paraffin Wax in Low-Temperature Thermal Energy Storage Applications: An Experimental and Numerical Investigation. Energies 2021, 14, 538 .
AMA StyleAgnieszka Ochman, Wei-Qin Chen, Przemysław Błasiak, Michał Pomorski, Sławomir Pietrowicz. The Use of Capsuled Paraffin Wax in Low-Temperature Thermal Energy Storage Applications: An Experimental and Numerical Investigation. Energies. 2021; 14 (3):538.
Chicago/Turabian StyleAgnieszka Ochman; Wei-Qin Chen; Przemysław Błasiak; Michał Pomorski; Sławomir Pietrowicz. 2021. "The Use of Capsuled Paraffin Wax in Low-Temperature Thermal Energy Storage Applications: An Experimental and Numerical Investigation." Energies 14, no. 3: 538.
The work deals with an experimental and theoretical analysis of a special heat exchanger filled with the PCM (Phase Change Material) mixture of paraffin wax capsuled in the melamine-formaldehyde membrane and water, dedicated to low-temperature storage applications. In the first part of the article, the PCM topic was introduced. The next part consists information about the designed and manufactured special heat exchanger with the PCM. During the experiment as a PCM is utilized mixture of paraffin wax in microcapsules within the water. The experimental results of temperature distributions and stored energy in the heat exchanger were compared with the theoretical model proposed in the literature. In the discussion section, the authors describe a new idea of the PCM storage tank application, which could be applied e.g. in nuclear facilities.
Agnieszka Ochman; Sławomir Pietrowicz. The thermal behaviour of a special heat exchanger filled with the phase change material dedicated for low – temperature storage applications. EPJ Web of Conferences 2019, 201, 01003 .
AMA StyleAgnieszka Ochman, Sławomir Pietrowicz. The thermal behaviour of a special heat exchanger filled with the phase change material dedicated for low – temperature storage applications. EPJ Web of Conferences. 2019; 201 ():01003.
Chicago/Turabian StyleAgnieszka Ochman; Sławomir Pietrowicz. 2019. "The thermal behaviour of a special heat exchanger filled with the phase change material dedicated for low – temperature storage applications." EPJ Web of Conferences 201, no. : 01003.