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INVENTION
Russian Federation Patent RU2282107
Cyclone heat exchanger elements Recuperators
Name of the inventor: Saburov Eduard (RU)
The name of the patentee: State educational institution of higher education Arkhangelsk State Technical University of the Federal Agency for Education (Rosobrazovanie) (ASTU) (RU)
Address for correspondence: 163002, Arkhangelsk, Embankment. Northern Dvina, 17, Arkhangelsk State Technical University, №07, patent specialists
Starting date of the patent: 2005.01.11
The invention relates to a heat transfer technique and can be used in heating the air in the industrial power. Summary of the invention that the heat exchanger cyclone heat exchanger element comprises muting one end the bottom tube connected thereto air supply and discharge nozzles arranged in the bottom area relative to the opposite end of the tube, wherein the air supply pipe mounted tangentially to the pipe. air inlet pipe installed at an angle of about 78 ° with respect to the tube and the inner surface of the bottom is provided with artificially rough surface. This design can significantly reduce metal heat exchanger.
DESCRIPTION OF THE INVENTION
The invention relates to a heat transfer technology and may find application in industrial power.
Known regenerative air preheater heat exchanger element arranged in the form of inner and outer pipes, the latter of which is plugged with a bottom end located on the output end of the inner tube with a predetermined gap (AS 941793, IPC F 3 23 L 15/04, 1982). The disadvantage of this solution is the low level of heat intensity and high metal content devices.
Known heat exchanger the heat exchanger element comprising an annular and central channels formed inside and outside, plugged at one end of the bottom tube connected to the tank's inlet and outlet of air, placed in a zone opposite relative to the bottom ends of the tubes, the air supply pipe is placed on the outer tube and mounted tangentially (AS 1386804, IPC 4 F 23 L 15/04, 1987).
This solution is the most similar to the claimed and taken as a prototype.
The disadvantage of the prototype is relatively high metal content devices.
The task to be solved by the invention is the reduction of metal heat exchange element of the cyclone heat exchanger.
This is achieved in that a cyclone heat exchanger element the heat exchanger comprising muting from one end of the bottom tube connected thereto pipes for supplying and removing air located in a zone opposite relative to the bottom end of the pipe, pipe supplying air installed on the pipe tangentially at an angle of about 78 ° for with respect to the tube and the inner surface of the bottom is made artificially roughened.
The invention is illustrated by drawings, where Figure 1 illustrates a cyclone and a heat exchange element of the heat exchanger obtained in experiments airflow in the heat exchange circuit heat exchanger element, Figure 2 - a cross section A-A in Figure 1.
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Cyclone heat exchanger heat transfer element comprises a tube 1 with a bottom 2 artificially roughened inner surface, the inlet fitting 3, is tangentially mounted on the tube at an angle of 78 ° relative to a generator, and an outlet 4. Cyclone heat exchanger element the heat exchanger operates as follows. The cool air through the pipe 3 is introduced into the heat exchange element and twists. moving air is heated along a helical path on the inner surface of the pipe 1 comes to the bottom 2, intense radial Leakage from rough bottom region is moved in the axial tube through which air supplied to the nozzle outlet 4 and discharged to the outside therethrough. Presented in Figure 1 airflow schematic longitudinal gradients determined negative pressure on the inner surface of the tube 1 in its axial region, a and uncompensated radial pressure gradient arising due to disturbances in the flow of dynamic equilibrium under the influence of friction on the rough surface of the bottom 2. |
Diagram of airflow in the heat exchange element, the values of the angle of the input stream and the use of artificial roughness on the bottom of the heat exchange element necessary for its organization, confirmed by special experiments (EN Saburov cyclonic heating devices with intensified convective heat transfer - Arkhangelsk:. Northwestern . book publishing house, 1995. -. 341)..
The proposed design of the cyclone heat exchange element of the heat exchanger to significantly reduce its metal content.
CLAIM
Cyclone heat exchanger the heat exchanger element comprising muting from one end of the bottom tube connected thereto air supply and discharge nozzles, placed in the zone opposite relative end of bottom pipe and the air supply pipe mounted on the pipe tangentially, characterized in that the air supply nozzle is installed at an angle about 78 ° with respect to the tube and the inner surface of the bottom is provided with artificially rough surface.
print version
Publication date 18.12.2006gg
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