Thermal Characterisation of a Double Panel Concrete Radiator Based on Experimental Investigations

As heating systems are one of the most energy-intensive accessories in homes, it is crucial that radiators are both energy efficient as well as provide adequate thermal comfort. This paper presents an experimental investigation to characterise a radiator that utilises a concrete-cast heating element system. The covering of concrete enables heat output to be sustained in the room for a longer period than conventional metal-body radiators. The experimental analysis was conducted in two steps: first, the non-uniformity in the surface temperature was investigated and characterised quantitatively. Secondly, the power consumption of the radiator was monitored and related to the temperature field inside the room. It has been revealed that the temperature field is highly non-uniform. The bottom left corner of the radiator radiates a higher temperature than the rest of the surface. It has been found that the rear surface has higher thermal non-uniformity than the front surface. Results also show relationships between the transient room heating performance, measured through multiple thermocouples, and the radiator in terms of heating time and heat retention time.