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Figure 5. Comparison of computed and experimental time relationships of the external surface of the fabric with different amount of BS coating the surface of the fabric. The key parameters of the model: ap = 4.5./ATfor model without BS, ags = |.15./ ATfor models with butyl stearate PCM as the surface layer.

Figure 5 Comparison of computed and experimental time relationships of the external surface of the fabric with different amount of BS coating the surface of the fabric. The key parameters of the model: ap = 4.5./ATfor model without BS, ags = |.15./ ATfor models with butyl stearate PCM as the surface layer.

Related Figures (10)

Figure |. Computational models of material sample cells used for DSC. Outer diameter 5mm (a) and 3.2 mm (b), BS height 0.3 mm (a) and 0.73 mm (b), full height of the cell 0.6mm (a) and | mm (b), computed and DSC experimental heat capacity curves of model (a) at temperature change rate 10°C/min (c), computed specific heat curves of model (b) at temperature change rate 10°C/min and 100°C/min (d).
Figure |. Computational models of material sample cells used for DSC. Outer diameter 5mm (a) and 3.2 mm (b), BS height 0.3 mm (a) and 0.73 mm (b), full height of the cell 0.6mm (a) and | mm (b), computed and DSC experimental heat capacity curves of model (a) at temperature change rate 10°C/min (c), computed specific heat curves of model (b) at temperature change rate 10°C/min and 100°C/min (d).
Table |. Thermo-physical properties of butyl stearate
Table |. Thermo-physical properties of butyl stearate
Figure 2. Heat capacity curves of the fabric layer with PCM at temperature change rate 10°C/min. Comparison against pure butyl stearate curves (a) and comparison against the heat capacity values of fabric without butyl stearate (b, horizontal lines without markers) BS: butyl stearate.
Figure 2. Heat capacity curves of the fabric layer with PCM at temperature change rate 10°C/min. Comparison against pure butyl stearate curves (a) and comparison against the heat capacity values of fabric without butyl stearate (b, horizontal lines without markers) BS: butyl stearate.
where F,, Fr are the nodal IR flux densities propagat- ing in the left and right directions with respect to Ox The general equation system describing the FE sub. jected to IR radiation reads as
where F,, Fr are the nodal IR flux densities propagat- ing in the left and right directions with respect to Ox The general equation system describing the FE sub. jected to IR radiation reads as
Figure 3. Computational model for investigation of thermal properties of the fabric coated by the butyl stearate PCM layer in case of IR heating.
Figure 3. Computational model for investigation of thermal properties of the fabric coated by the butyl stearate PCM layer in case of IR heating.
Table 2. Characteristics of 3D warp-knitted spacer fabric
Table 2. Characteristics of 3D warp-knitted spacer fabric
Figure 4. Laboratory stand for measuring the thermal behavior of the spacer fabric coated with pure BS (a); experimental therma curves of non-coated, 50 g/m” and 150 g/m? BS coated spacer fabrics during heating and cooling (b); and thermographs of samples obtained after 240 seconds heating by IR lamp (c). IR: infrared: BS: butyl stearate.
Figure 4. Laboratory stand for measuring the thermal behavior of the spacer fabric coated with pure BS (a); experimental therma curves of non-coated, 50 g/m” and 150 g/m? BS coated spacer fabrics during heating and cooling (b); and thermographs of samples obtained after 240 seconds heating by IR lamp (c). IR: infrared: BS: butyl stearate.
Figure 6. Temperature—time relationships of the surface at isolated side and at open-air surface of the PCM-coated fabric in case of IR heating, where different values of heat transfer coefficient ags are used.
Figure 6. Temperature—time relationships of the surface at isolated side and at open-air surface of the PCM-coated fabric in case of IR heating, where different values of heat transfer coefficient ags are used.
Figure 7. Transient temperature response of the fabric coated by the PCM layer at multi-cycle heating-cooling (H-C): responses of fabric coated by 50 g/m? surface density PCM at different durations of H-C cycles (a); comparison of 120s multi-cycle H-C responses at different surface density of PCM coating (b). BS: butyl stearate; PCM: phase change material.
Figure 7. Transient temperature response of the fabric coated by the PCM layer at multi-cycle heating-cooling (H-C): responses of fabric coated by 50 g/m? surface density PCM at different durations of H-C cycles (a); comparison of 120s multi-cycle H-C responses at different surface density of PCM coating (b). BS: butyl stearate; PCM: phase change material.
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Materials EngineeringMaterials ScienceManufacturing EngineeringPhase Change Material
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