Solving the problem of pipeline freezing with respect to external heat exchange

  • Natalija Parfentieva Moscow State University of Civil Engineering
  • Kęstutis Valančius Vilnius Gediminas Technical University
  • Oleg Samarin Moscow State University of Civil Engineering
  • Sabina Paulauskaitė Vilnius Gediminas Technical University
  • Jolanta Čiuprinskienė Vilnius Gediminas Technical University
Keywords: pipeline, freezing front, frictional heat, Stefan condition, Biot criteria

Abstract

The paper proposes a solution to the problem of freezing of heating pipelines in engineering systems in buildings in emergency situations. A mathematical process model is proposed, wherein heat emissions induced by viscous friction and phase transition are taken into account. Formulas for estimating the rate of freezing have been obtained. Calculation results obtained by using numerical methods are presented. Recommendations on the proper choice of pipe-line diameters to reduce the probability of liquid freezing therein are provided as well.

DOI: https://dx.doi.org/10.5755/j01.mech.21.5.11411

Published
2015-10-16
Section
MECHANICS OF FLUIDS AND GASES