Integrated enhanced heat exchange method by combining boundary layer control with mainstream disturbance

Abstract

An integrated enhanced heat exchange method by boundary layer control with mainstream disturbance comprises a multiple of heat transfer enhancement units, in which a periodic vortex is formed along a extending direction of the flow control channel by setting boundary layer flow control devices, the vortex cleans the cold and hot side walls, as a result the flow boundary layer that hinders heat transfer is destroyed, and rapidly transferring cold and heat energy generated from the cold and hot side walls to a flow mainstream channel is realized. A mainstream disturbance device is set on the mainstream of flow to form an axial vortex at the back of the mainstream disturbance device, the axial vortex cooperates with a stream from the flow boundary layer to rapidly transfer the cold and heat energy from the flow boundary layer to entire field to form an even temperature field.

Claims

1. An integrated heat exchange method by combining boundary layer control with mainstream disturbance comprising: dividing a flow control channel (31 and 32) into a cooling dehumidification channel (31) and a heating temperature control channel (32) by a semiconductor thermoelectric device (2), running air through the cooling dehumidification channel (31) first and then through the heating temperature control channel (32), dividing the cooling dehumidification channel (31) and the heating temperature control channel (32) into parallel and closed-circumference hollow flow passages (33) by metal vanes (34), the metal vanes (34) have thermal conducting properties, each flow passage (33) is regarded as a heat transfer unit (33); within each heat transfer unit 33, a multiple of boundary layer flow control devices (12) are set near a flow boundary layer (35) to form a periodic vortex along the flow control channel (31 and 32), for sweeping the cold and hot side walls of the heat transfer unit, as a result the periodic vortex destroys the flow boundary layer (35) that hinders the heat transfer unit (33) and helps to rapidly transferring cold and heat energy generated from the cold and hot side walls to a mainstream of flow; a multiple of mainstream disturbance devices (15) are set on the mainstream of the flow control channel (32 and 33) to form an axial vortex at the back of each mainstream disturbance device (15), the axial vortex in conjunction with a flow from the flow boundary layer 35 rapidly transfer the cold and heat energy from the flow boundary layer (35) to the entire field of the flow control channel (32 and 33).

2. The integrated heat exchange method by boundary layer control with mainstream disturbance of claim 1, wherein a multiple of boundary layer flow control devices (12) are set in axial direction adjacent to the wall surface of the flow control channel (31 and 32) at a same interval; a multiple of mainstream disturbance devices (15) are set in the middle of the flow control channel (31 and 32) at a same interval along axial direction.

3. The integrated heat exchange method by boundary layer control with mainstream disturbance of claim 2, wherein the boundary layer flow control device (12) is a bluff body.

4. The integrated heat exchange method by boundary layer control with mainstream disturbance of claim 3, wherein the bluff body is a disturbance cylinder.

5. The integrated heat exchange method by boundary layer control with mainstream disturbance of claim 2, wherein the mainstream disturbance device (15) is column with a triangular or oval or circular cross section.

6. A heat exchange system combines with integrated heat exchange method by boundary layer control and mainstream disturbance comprising: an insulating case (1); a semiconductor thermoelectric device (2) including a cold end (3) and a hot end (4) in the insulating case; a first vane assembly located in a refrigerating terminal (5), which is connected to the bottom face of the cold end (3), an upstream side of the first vane assembly is connected with an air inlet; a catchment trough (7) arranged below the first vane assembly, a drain (8) is provided below the catchment trough (7); a second vane assembly located in a heating terminal (9) above the hot end (4); the first vane assembly comprises at least two vanes (11) arranged in parallel, each vane (11) of the first vane assembly is provided a multiple of boundary layer flow control devices (12) longitudinally arranged adjacent to the wall surfaces of the vane respectively, each vane (11) is a thermally conductive hollow pipe structure; the second vane assembly comprises at least two vanes (14) arranged in parallel, each vane (14) of the second vane assembly is provided a multiple of mainstream disturbance devices (15) longitudinally arranged at a middle position of the vane, each vane is a thermally conductive hollow pipe structure.

7. The heat exchange system combines with integrated heat exchange method by boundary layer control and mainstream disturbance of claim 6, wherein the boundary layer flow control device (12) is a disturbance cylinder.

8. The heat exchange system combines with integrated heat exchange method by boundary layer control and mainstream disturbance of claim 6, wherein the mainstream disturbance device (15) is a column with a triangular or oval or circular cross section.

9. The heat exchange system combines with integrated heat exchange method by boundary layer control and mainstream disturbance of claim 6, wherein the longitudinal cross sections of the vane of the first vane assembly is trapezoid.

10. The heat exchange system combines with integrated heat exchange method by boundary layer control and mainstream disturbance of claim 9, the cross sections in axial direction of the vane of the first vane assembly is W shape.

11. The heat exchange system combines with integrated heat exchange method by boundary layer control and mainstream disturbance of claim 9, wherein a screen mesh (13) is set adjacent to the wall surface of the vane of the first vane assembly.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic diagram of flow without flow control in the current technology.

(2) FIG. 2 is a schematic diagram of traditional boundary layer control method and flow in the current technology.

(3) FIG. 3 is a schematic diagram of flow for the invention.

(4) FIG. 4 is a structure diagram of the integral heat transfer enhancement system with boundary layer control and mainstream disturbance for the invention.

(5) FIG. 5 is a structure diagram of the first vane assembly (the vanes are not equipped with mainstream disturbance device) in Embodiment 1.

(6) FIG. 6 is a structure diagram of the first vane assembly (the vanes are equipped with mainstream disturbance device) in Embodiment 1.

(7) FIG. 7 is a structure diagram of the vanes in the first vane assembly.

(8) FIG. 8 is a diagram of the relation between the mesh and vane wall surface in the vanes of the first vane assembly in Embodiment 2.

(9) FIG. 9 is a structure diagram of the second vane assembly in Embodiment 2.

DETAIL DESCRIPTION OF THE INVENTION

(10) The following is a detailed description of the invention by illustrating the attached figures and the implementation modes:

(11) In FIG. 3, An integrated dehumidification method that combines boundary layer control with mainstream disturbance enhanced heat exchange, characterized in that a division of a flow control channel into a cooling & dehumidification channel through a semiconductor, an air runs through the cooling & dehumidification channel before running through the heating & temperature control channel, both channels are divided into multiple parallel and all-round sealed hollow flow channels by the metal vanes that have good thermal conducting properties, each flow channel is deemed as a heat transfer enhancement unit; within each unit, a periodic vortex is formed along a extending direction of the flow channel by setting a boundary layer flow control device adjacent to a boundary layer, thus realizing cleaning of the cold and hot side walls, as a result it destroys the boundary layer blocking heat transfer, and helps to rapidly transfer a cold and heat energy generated on the cold and hot side walls to a flow mainstream channel; a mainstream disturbance device is set on the flow mainstream channel to form an axial vortex at the back of the device to cooperate with a stream emanating from the boundary layer, thus rapidly transferring the cold and heat energy from the boundary layer to a whole field to form an even temperature field. The multiple boundary layer flow control devices are set in axial direction adjacent to the wall surface of the flow channel at the same intervals; the multiple mainstream disturbance devices are set centrally in the axial direction of the flow channel at the same intervals.

(12) In the embodiments of the invention, the boundary layer flow control device is a disturbance cylinder. The mainstream disturbance device is a triangular or oval or circular blade in axial arrangement along the flow channel on the mainstream channel.

(13) The system in the invention adopts the integral processing method of heating and cooling. As for the flow processing procedure, firstly the water is separated when the air flows through the cooling and dehumidification processing end; and then starts the overheating processing where the enhancement unit of the heat end produces the required air temperature. The air to be processed is firstly drawn in through a first fan and secondly goes through the refrigerating terminal 5 of multi-unit boundary layer and the mainstream integral enhancement. Under the action of gravity, the condensate drains to catchment trough 7 along the bottom line of trapezium-cross flow channel. Then the air is efficiently heated when passing through a second fan 4 to a heating terminal 9 of multi-unit boundary layer and mainstream integral enhancement. Therefore, the integral processes of heating and cooling occur. The vane area and the flow rate of units can be designed in accordance with the flow volume of the incoming flow as well as the requirements for temperature.

Embodiment 1

(14) The integrated dehumidification system combines boundary layer control with mainstream disturbance enhanced heat exchange is shown in FIG. 4, FIG. 5, FIG. 6 and FIG. 8.

(15) The system comprises an insulating case 1; a semiconductor thermoelectric device 2 in the insulating case 1, consisting of a cold end 3 and a hot end 4; a first vane assembly on a refrigerating terminal 5 connected below to the cold end 3, an upstream side of the first vane assembly is connected with an air inlet; a catchment trough 7 arranged below the first vane assembly, a drain 8 provided below the catchment trough 7; a second vane assembly on a heating terminal 9 above the hot end 4; the first vane assembly comprising at least two vanes 11 arranged longitudinally, each vane of the first vane assembly is provided multiple boundary layer flow control devices 12 longitudinally arranged adjacent to the wall surfaces of the vane respectively, each vane is a heat conductive hollow pipe structure; the second vane assembly comprising at least two vanes 14 arranged longitudinally, each vane of the second vane assembly is provided multiple mainstream disturbance devices 15 longitudinally arranged at a center of the vane, each vane is a heat conductive hollow pipe structure. The longitudinal cross sections of the vane 11 of the first vane assembly is trapezoid, he cross sections in axial direction of the vane of the first vane assembly is oblong.

Embodiment 2

(16) The integrated dehumidification system combines boundary layer control with mainstream disturbance enhanced heat exchange is shown in FIG. 4, FIG. 7, FIG. 8 and FIG. 9.

(17) The system comprises an insulating case 1; a semiconductor thermoelectric device 2 in the insulating case 1, consisting of a cold end 3 and a hot end 4; a first vane assembly on a refrigerating terminal 5 connected below to the cold end 3, an upstream side of the first vane assembly is connected with an air inlet; a catchment trough 7 arranged below the first vane assembly, a drain provided below the catchment trough 7; a second vane assembly on a heating terminal 9 above the hot end 4; the first vane assembly comprising at least two vanes 11 arranged longitudinally, each vane of the first vane assembly is provided multiple boundary layer flow control devices 12 longitudinally arranged adjacent to the wall surfaces of the vane respectively, each vane is a heat conductive hollow pipe structure; the second vane assembly comprising at least two vanes 14 arranged longitudinally, each vane of the second vane assembly is provided multiple mainstream disturbance devices 15 longitudinally arranged at a center of the vane, each vane is a heat conductive hollow pipe structure. The longitudinal cross sections of the vane 11 of the first vane assembly is trapezoid, the cross sections in axial direction of the vane of the first vane assembly is W shape. A screen mesh 13 is set adjacent to the surface of the vane of the first vane assembly.

Embodiment 3

(18) Specific configurations are stated as follows relevant to different industrial applications of this invention:

(19) Domestic dehumidification: Domestic dehumidification mainly involves the storage and quick drying of articles in rainy seasons (hanging articles on the heating terminal). furthermore, it is also highly suitable to provide high-quality air at home. With regard to the wet and cold regions in the Yangtze River basin, this invention can supply separate heating and dehumidification to enhance the user's environment while ensuring low energy consumption. When compared with various conventional heating approaches, it will inevitably improve air treatment efficiency owing to its characteristics of separate heating and dehumidification.

(20) Industrial dehumidification: In view of industrial dehumidification, efficient separation with aerosol has a promising prospect. Conventional dehumidification is normally achieved by means of inertia separation, intercepted separation and filtration with wire mesh, which requires high energy consumption. However, this type of dehumidification is inefficient for aerosol of small grain size in respect of high motion tracking. Efficient separation of aerosol with low energy consumption is a critical problem. Through the full integration of the dual effects of flow control and condensation treatment, this invention can significantly improve the efficiency in the separation of aerosol and vane drips at extremely low energy consumption, beyond the reach of conventional dehumidification methods.

(21) Storage of articles: Articles that are to be stored at constant humidity and temperature. Conventional dehumidification is carried out with methods requiring high energy consumption, such as refrigerated circulating dehumidification, which has the disadvantages of high price and low efficiency. Creation of a suitable air environment for storage in a quick and efficient manner at low energy consumption has considerable application value. The processing device provided by this invention provides suitable temperature and humidity in confined spaces, providing high-quality air to facilitate the long-term storage of articles.

(22) Portable artificial environment: Another important advantage of this invention is that it is available for integration with such new energies and energy conservation techniques as solar energy. Owing to its light weight and small volume, it can provide users with a high-quality air confined space when configured as an enclosed unit through the application of multilayer technology for the space chamber. It is applicable in such special fields as camping, field hospital and archaeological studies.

(23) Comprehensive techniques for economical air circulation system in high-humidity environments: Another application of this invention in a high-humidity environment is in the filtration and disinfection of large quantities of condensate produced by dehumidification in the process of unit dehumidification to provide high-quality potable water at low energy consumption. This method is applicable to various offshore industrial fields or high-humidity regions lacking in water. Whilst providing customers with a comfortable air environment, it can also provide quantities of potable water, thereby forming an economical and comprehensive technical circulation system.