Analysis of thermal insulation of pre-insulated triple pipes - preliminary numerical tests

Abstract

Pre-insulated  pipes  play  an  important  role  in  the energy-saving  heat  transport.  The  paper  presents  preliminary results of the analysis of heat losses in a pre-insulated triple pipe. The determined heat losses in the pre-insulated triple pipes were compared   with   the   existing   pre-insulated   overhead   network consisting  of  three  separate  single  pre-insulated  pipes  in  a  meat processing  plant  located  in  north-eastern  Poland,  as  an  example of  industrial  plants  with  specific  water  needs  for  technological processes.  The  solution  of  the  triple  pre-insulated  network  was also compared  with the network  system built of a twin pipe pre-insulated  pipe  and  a  single  pre-insulated  pipe.  Heat  losses  in  a pre-insulated triple pipe turned out to be about 42% smaller than the    heat    losses    of    three    pre-insulated    single    pipes.    All calculations  were  made  using  a  proprietary  calculation  program developed in Fortran.