THE CHOICE OF THE RATIONAL SCHEME OF GAS FLOW IN RESIDENTIAL FURNACE

Introduction. The study presents an approach to the correct selection of the gas flow system in the furnace, the dosed air supply to the furnace, the choice of the sizes of the furnace flues, the length of their channels and their number. Coordination of the furnace with the chimney provides the most efficient design of the furnace. The phenomenon that occurs in any heated vertical channel with respect to the ambient air temperature is called “draft” for the chimney and “flue effect” for the sections of the furnace. The draft or flue effect (vacuum or pressure) is expressed in units of pressure (Pa). This channel can create either a vacuum or a head depending on which end of the channel is connected to the atmosphere. Summarizing the values of flue effect on all areas of the furnace, the total value of flue effect for the entire furnace can be obtained. All channel furnaces according to the hot gas flow scheme are divided into two characteristic groups: direct flows and counter flows. Such a difference in the flow of hot gases has a great influence on the total value of the flue effect of the furnace. Since the total draft of the furnace system affects the process of wood combustion, i.e. the chimney draft and the flue effect of the furnace itself, the study of various schemes of the flow of gases in the furnace, has provided the most rational scheme of the flow of gases in the furnace, which got a patent on a utility model, which provides a more uniform process of wood combustion in the residential furnace and thus increases furnace efficiency. The study is aimed to analyze the various schemes of the flow of hot gases in the furnace and the choice of the most rational scheme. Materials and methods. A detailed examination and study of the effect of various gas flow schemes in a residential furnace on the characteristics of the furnace has been carried out. Results. The results of the study and examination have been used to develop recommendations on the choice of the most rational scheme of gas flow in the furnace and the choice of its design values. Conclusions. The results of the work can be recommended in the development of residential furnaces.