SU1086340A1 - Heat exchange tubular element - Google Patents

Abstract

1. TUBULAR HEAT EXCHANGER ELEMENT. containing an inner perforated tube and an outer tube with a ribbing which is in close contact with it, characterized in that, in order to intensify heat exchange, the perforation of the inner tube is made with petals bent towards the inside of the tube. 2. The element according to claim 1, wherein the perforation is located in several rows along helical lines. $ 4 WITH

Description

 1 y

  Q

 Q Q -) 5) 0k / o V

X „„ „The invention relates to heat engineering and can be used in heat exchanging devices. The tubular element of the heat exchanger is known, which contains an inner tube and an outer tube with ribs 1 tightly seated on it. A disadvantage of the element is low efficiency due to the low thermal conductivity of the inner tube and the absence of turbulizing devices inside the tube. The tubular element of the heat exchanger is known, which contains an inner perforated tube and an outer tube in close contact with it with the fins. Moreover, the ribs are made with through holes aligned with perforation 2. However, the intensification of heat exchange in the element is insufficient due to the lack of internal fins. The purpose of the invention is to intensify heat transfer. This goal is achieved by the fact that in the tubular element of the heat exchanger containing the inner perforated tube and the outer tube with fins tightly in contact with it, the perforations of the inner tube are made with lenestkami, bent inward of the tube. Perforations are located in several rows along helical lines. On fi. , 4CT; : i / 4; i tubular e.chemeite, strait /, ny incision; liii syb. 2 - the element, but the cross section. The tubular element of the thinner bar contains an inner pipe 1 with perforations 3 made on its walls 3) and perforations 4 with ribbons 4, bent inwards through the passage channel 5 of said pipe. An outer tube 6 with fins 7 is tightly seated on the inner tube 1. The tubular element of the heat exchanger operates as follows. The coolant, the passage through the passageway 5 of the inner tube 1, meets in its path the petals 4 of the perforations, which are located along the entire length of the inner tube 1 in several rows along a helix. The heat carrier, located in the passage channel 5 of the inner tube 1, transfers its heat to the walls 2. And through the perforations 3, the outer tube 6. The heat received by the walls 2 of the inner tube 1 is transferred to the outer tube 6. Thus, some of the heat through the holes 3, the perforations are perceived directly by the outer tube 6, which improves efficiency. Further, heat from the outer pipe 6 is transferred through the fins 7 to the environment. The flow, passage through the passage channel of the inner tube, is turbulized, which leads to an increase in the heat transfer coefficient from the coolant to the wall of the inner tube and the intensification of heat transfer.

ig. 2

Claims (2)

1. TUBULAR ELEMENT HEAT EXCHANGE. containing an inner perforated pipe and an outer pipe with finning in tight contact with it, characterized in that, in order to intensify heat transfer, the perforation of the inner pipe is made with petals bent into the pipe. 2. An element in π. 1, characterized in that the perforation is located in several rows along helical lines. 4 J SU „„ 1086340 I 0863W