Chimney system is one of the key components of a building's heating system. Proper design and sizing of chimney are essential for ensuring adequate draft and effective flue gas evacuation. A crucial part of the design process is appropriate selection of materials. This thesis presents an overview of chimney systems, with a focus on measurement and analysis of thermal properties of most commonly used base materials in chimney construction: stainless steel AISI 316L and chamotte brick. Thermal property measurements were carried out in accordance with ISO 22007 standard, using Hot Disk TPS 2200 instrument and transient plane source method. Thermal properties measured include thermal conductivity, thermal diffusivity and specific heat capacity. Determined thermal properties of AISI 316L stainless steel at room temperature are as follows: thermal conductivity 14,50 ± 0,031 W∙m-1∙K-1, thermal diffusivity 3,744 ± 0,021 mm2∙s-1 and specific heat capacity 3,873 ± 0,015 MJ∙m-3∙K-1. The corresponding thermal properties of chamotte brick at room temperature are: thermal conductivity 1,742 ± 0,002 W∙m-1∙K-1, thermal diffusivity 1,438 ± 0,005 mm2∙s-1 and specific heat capacity 1,438 ± 0,005 MJ∙m-3∙K-1. We analyzed and compared the results. The results show significant differences in thermal properties between AISI 316L stainless steel and chamotte brick. All three measured values are higher for stainless steel. To demonstrate the significance of the impact that the selected construction materials have on the overall chimney system, a calculation was carried out using the method defined by the SIST EN 13384-1 standard. In the selected case, the calculation method showed a greater negative pressure and a higher flue gas outlet temperature when a stainless steel liner was used. In our selected example, both systems are compliant with the SIST EN 13384-1 standard and suitable for use.
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