Ways to Reduce Heat Loss in the Radiator Section of the Building Envelope

Abstract

Reducing heat losses of building envelopes in the radiator section is a well-known energy efficient measure that does not require significant investment and has a fairly significant effect. The main known way is the use of radiator screens of heat-insulating material and a reflective surface that faces to the room. The use of such screens is usually carried out without appropriate calculations and in the absence of specific technical characteristics. When developing new designs of heating devices, it is necessary to take into account the specific features of the heat transfer of the device to the wall in the radiator area and include measures to reduce such heat losses in the device design. The article discusses the new design of the heating device section developed at the Department of Thermal Engineering and various constructive methods for reducing heat loss through the radiator section. The proposed radiator contains heat insulation on the bottom rib of the radiator. Also, the article discusses the features of heat exchange of a radiator with a wall in a radiator area and an in-depth literature review of the works devoted to this topic is carried out. Based on the review, we can conclude that the known works do not give a holistic understanding of heat transfer processes in the studied system of bodies. It was also revealed that the leading manufacturers of heating equipment are working out ways to reduce heat loss through the radiator sections of the building envelope. I n particular, this is the decrease in the temperature, °С, of the wall of the radiator that faces the wall. The results of the article show the possibility of increasing the efficiency of the heating device by almost 4 % and reveal unexplored features of the heat exchange of heating devices and the external wall.