Other radiator designs.

Of the large number of different radiators, only slatted radiators will be presented. Slatted radiators (also called heating strips or radiators and plinths) have the form of a floor strip placed next to the walls of the rooms. These are low and long heating elements, usually made of copper or steel (as well as light metals) and consisting of ribbed tubes placed in a steel housing and fed by water or steam. The design and principle of operation of a simple plinth heater is shown in the figure.

The principle of operation and the scheme of a steel strip radiator. Marks: 1 – H-height skirting board, located at a distance S from the external wall, 2 – air inflow from the room, 3 – heated air outflow.

The dependence of the heat output of strip heaters on the temperature of the heating water. Marks: A, B i C – according to the table in fig

The thermal efficiency of the used types of heaters is presented (differing in dimensions and number of heating pipes). These heaters release heat mainly by convection. Sometimes their air inlets or outlets are equipped with flaps and shutters regulated by buttons or levers. The condition for the proper operation of these radiators is good thermal insulation of the rear walls and the possibility of free elongation as the temperature of the heating water increases. (appropriate suspensions are used, enabling compensation, etc.). These solutions have a number of advantages: occupy a small area, They are characterized by high aesthetics, easy assembly and favor a favorable temperature distribution in the room. The disadvantages are difficulties in keeping clean and arranging furniture.

The discussed solutions include strip heaters of the Slant / Fin type, which have a heating element in the form of a copper wire (∅¾”) equipped with small aluminum fins (60×60 Mm). Their height is approx 180 Mm, and the length 610, 1070 1520 i 2130 Mm. Thermal performances range from 340 In (for the length 610 Mm) into 1190 In (2130 Mm). Another heating structure that allows to limit the unfavorable radiation of cold glass partitions, is to place heating cables in the window frames. This solution is used in aluminum windows with a frame circumference 8,6 m and values ​​of the heat transfer coefficient lower than 2,5 W / m2K). This is usually a copper tube (12×1 Mm), which for the heating water flow 100-110 dm3 / h allows to obtain a thermal power from 60 into 140 W/m, depending on the temperature difference between the average heating water temperatures and the air temperature in the room. If a suitable coolant flows through the pipes, it is also possible to obtain favorable cooling effects in summer. However, the discussed solution requires very good thermal insulation from the outside due to the possibility of condensation on the pipes.