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Performance evaluation and research of alternative thermal insulation based on waste polyester fibers

Lelkou Alexandra

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Summary

The topic of this thesis is "Evaluation of Performance and Research of Alternative Thermal Insulation Based on Waste Polyester Fibers ". The purpose of the project is to study the performance of new insulation materials in building installations. Secondary polyester fiber is the study material and comes from recycled PET bottles.The need for insulation has been developed for centuries and focuses on maintaining an average temperature inside buildings. Polyester is a material widely used in the daily lives of people with extremely high daily consumption. Polyester decomposition is difficult, making polyester waste one of the biggest problems of pollution and overburden on the planet. Recycling and reuse are therefore a prerequisite. The combination of the above two needs led to the manufacture of polyester plates, derived from regenerated polyester fiber.The stages of fabrication of the polyester fiber followed by the polyester plates studied are of particular interest. The polyester plates used to perform the experimental measurements consisted of mixing primary and secondary polyester fibers. The main reason for this mixing is that the primary fiber contributes to the bonding process of the fibers, thus avoiding the use of resin.Measurements were made with two different machines: the Hot Disk and the TLP 300. The Hot Disk uses the TSP (Transient Plane Source) method. It consists of a sensor located between two plates of the same sample, which emits heat. The measurements are based on the heat exchange over time. The second machine uses the guarded hot-plate method. The materials studied are housed in a well insulated box. Between the two specimens is placed a thermal plate, which radiates heat, and on the outer sides of the specimens are placed cold plates. The process is completed when the system is in equilibrium and the value of the thermal conductivity is calculated from the temperature rise of the cold plates.The number of samples studied is eight. Each had a different composition in terms of their primary and secondary composition, as well as differing in their density and thickness.For the TSP method the results were analyzed in two different ways. Fine Tune Analysis and Standard Analysis. The TSP Fine Tune Analysis method calculated a thermal conductivity range of 0.03317-0.05273W / (m * K), the TSP Standard Analysis method calculated a thermal conductivity value range of 0.01527-0.02414W / (m * K) and the guarded method hot-plate 0.0342-0.0495 W / (m * K).

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