Optimization of Geometric Parameters of Thermal Insulation of Pre-Insulated Double Pipes

Dorota Anna Krawczyk and Tomasz Janusz Teleszewski
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Dorota Anna Krawczyk: Department of HVAC Engineering, Bialystok University of Technology, 15-351 Bialystok, Poland
Tomasz Janusz Teleszewski: Department of HVAC Engineering, Bialystok University of Technology, 15-351 Bialystok, Poland

Energies, 2019, vol. 12, issue 6, 1-11

Abstract: This paper presents the analysis of the heat conduction of pre-insulated double ducts and the optimization of the shape of thermal insulation by applying an elliptical shape. The shape of the cross-section of the thermal insulation is significantly affected by the thermal efficiency of double pre-insulated networks. The thickness of the insulation from the external side of the supply and return pipes affects the heat losses of the double pre-insulated pipes, while the distance between the supply and return pipes influences the heat flux exchanged between these ducts. An assumed elliptical shape with a ratio of the major axis to the minor half axis of an ellipse equaling 1.93 was compared to thermal circular insulation with the same cross-sectional area. All calculations were made using the boundary element method (BEM) using a proprietary computer program written in Fortran as part of the VIPSKILLS project.

Keywords: thermal insulation; double heating ducts; twin pipes; energy savings; pollutants emission; district heating; network (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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