Abstract
Thermographic investigation of a heating panel radiator under various conditions, especially with various heating water volume flow rate is described in this article. For a radiator type 10-500x1000 TBOE and for two levels of inlet water temperature (75 and 55 °C) a set of thermal images of surface temperature patterns for various values of heating water volume flow rate was taken. The initial value of flow rate was derived from nominal heating output and recalculated to real conditions. An increase of volume flow rate higher than 15 % over the nominal recalculated value is for the studied cases easily detectable on the resulting thermal images.
Highlights
Panel radiators are widely used components of heating systems in the region of Central Europe
Among others, for an efficient operation of a radiator is maintaining of an optimal value of heating water volume flow rate
This optimal value is calculated from nominal heating output, which is measured in an official test facility and its value must be provided by the manufacturer in the official product data sheet
Summary
Panel radiators are widely used components of heating systems in the region of Central Europe. Among others, for an efficient operation of a radiator is maintaining of an optimal value of heating water volume flow rate This optimal value is calculated from nominal heating output, which is measured in an official test facility and its value must be provided by the manufacturer in the official product data sheet. If the optimal value of volume flow rate is exceeded, the overall heating output is almost not affected; the only remarkable change would be in the temperature difference on the radiator and in higher pressure losses and higher energy consumption of the pump. A method using observation of a heating radiator with a thermal imaging device was investigated, in order to find out the possibilities of this approach for real applications (i.e. solid metering device independent, fast on-site check of radiators’ effectiveness related to volume flow rate)
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