HRP990181A2 - Rectangular heat exchanger tube with inner studs - Google Patents

Description

The field of technology

The subject of the invention is in the field of thermoenergetics, and it represents new types of pipes with an increased heating surface called PIPES OF RECTANGULAR SECTION WITH INCREASED HEATING SURFACE FROM THE INSIDE.

Technical problem

The technical problem is how to structurally and technologically increase the heating surface on the inside of the pipe.

State of the art

Increased heating surfaces are quite common forms of heat exchanger surfaces in thermotechnics. Thus, there are spirally ribbed pipes, polished pipes and pipes with lamellae (plates). All these are increased heating surfaces on the outside of the round tube. The gaseous medium (low heat transfer coefficient) flows over the increased surfaces on the outside of the round tube, while the liquid medium (higher heat transfer coefficient) flows inside the tube.

In thermotechnical devices that are designed so that the gaseous medium flows inside the pipe, as is the case with smoke pipe boilers, a logical technical question arises as to how to increase the transfer of heat inside the pipe. For this purpose, there are twisted "SWIRLIFO" tubes that turbulate the gases and increase the heat transfer by about 25%, or various forms of turbulators are inserted into the smooth tubes. It was thought about simulating the round tube from the inside, but it is technologically and geometrically unfeasible.

Increasing the heating surface from the inside can be done on square and rectangular half-pipes (PICTURE 1), which are then joined by welding into square and rectangular pipes in the manner shown in FIGURE 2, where the heating surfaces are supported by each other, and by supporting each other, they enable the use of larger pipes with a rectangular section pressures on the outside, i.e. a pipe with a rectangular section is calculated only on the shorter side. This form of pipe with a rectangular cross-section is economically justified because it enables the installation of a smaller number of pipes in thermal devices.

Claims (1)

1. Pipes of rectangular section with increased heating surface on the inside, indicated by the fact that there are welded pins on the inside (FIGURE 2).