Numerical analysis of the influence of the design type of the channel of heat network on its thermal conditions and heat loss

Abstract

The results of the numerical analysis of thermal regimes and heat loss of the two-channel underground heating networks with using the convective-conductive model of heat transfer are presented. The two-dimensional coupled stationary problem of convective-conductive heat transfer in the system «underground two -channel heat pipeline - environment» is solved. The solution of the problem was obtained by the finite element method with using an uneven finite-element grid. The scales of heat loss and the patterns of heat transfer in the zones of underground two-channel heating networks are established. The possibility of analyzing the heat loss of two-channel heating networks with using of the model and the methodology for calculating the heat loss for single-channel heating networks is shown.

Keywords

• heat networks
• heat loss
• heat pipeline
• channel
• mathematical modeling