15.07.2015   EuroSun2008-4

System description

image083

Fig. 1 Schematic drawing of the room heated for the case studied

The following assumptions are used in the mathematical modelling: (1) because the temperature changes along the embedded pipe is very minor; the heat transfer of the system is simplified to a two-dimensional steady-state heat transfer. In this regard, the outside surface temperature of the embedded pipe can be considered as uniform; (2) good contact exists between each layer, so thermal contact resistance is neglected; (3) the physical properties of construction materials do not change with temperature.