TW202217215A - Heat pipe heat exchanger capable of widely popularizing the low-temperature waste heat recovery modules and enhancing the energy utilization efficiency - Google Patents

Abstract

This invention relates to a heat pipe heat exchanger, which is composed of a communicating heat-conducting elbow vertically disposed on a heat insulating member. The communicating heat-conducting elbow has an inlet pipe section, at least one upper bend section, at least a straight-through section, at least a lower bend section, and an outlet pipe section, wherein the inlet pipe section can be connected to the first adjacent upper bend section; the outlet pipe section is connected to the last lower bend section; the two ends of each straight-through section are respectively connected to the adjacent corresponding ends of the upper and lower bend sections; and each of the communicating heat-conducting elbows has a communicated pipeline therein. Accordingly, the communicating heat-conducting elbow is designed as a single pipe communication and the recoverable waste heat with the highest potential is low-temperature waste heat. At the same time, the communicating heat-conducting elbow of this invention uses the surface of the metal pipe to transfer heat energy, so that the low-temperature waste heat recovery modules can be widely popularized and the energy utilization efficiency can be enhanced.

Description

heat pipe heat exchanger

The present invention belongs to the technical field of a heat pipe, and specifically refers to a heat pipe heat exchanger, so as to improve the efficiency of energy use.

According to, in the industrial process, about 20%~50% of the energy will be removed in the form of waste heat, and about 10%~50% of the waste heat energy will be recovered. Therefore, if the energy consumption can be reduced, the energy can be improved. Use efficiency. At present, industrial systems usually recover high-temperature and clean waste heat. Among the recyclable waste heat, low-temperature waste heat has the highest potential. However, the recovery of low-temperature waste heat will face many challenges. Significantly improve energy efficiency.

In traditional industrial waste heat recovery, heat pipe exchangers are often used as heat transfer devices. The main function is to recover the waste heat generated by the system to reduce energy consumption. The structure of the existing heat pipe exchanger and its operating principle are shown in the first and second figures, wherein a plurality of heat pipes (10) are vertically inserted on a heat insulating plate (20), and each heat pipe (10) is composed of two heat pipes (10). It is made of stainless steel pipe or carbon steel pipe with closed ends, and the inner wall of each heat pipe (10) is formed with a capillary structure (11), and the inside of each heat pipe (10) is filled with working fluid, and each heat pipe (10) is filled with working fluid. (10) The two ends different from the insulation board (20) are respectively defined as a high-pressure evaporation end (101) for waste heat input and a low-pressure condensation end (102) for heat output, and the evaporation at each of the heat pipes (10) Heat radiating fins (15) are arranged on the pipe walls of the end (101) and the condensation end (102). And each of the heat pipes (10) is input through the evaporation end (101) The heat causes the phase change of the working fluid in each of the heat transfer pipes (10), the high pressure state of the heat transfer pipes (10) enables the working fluid to be transferred to the low-pressure condensation end (102), and the vapor sent to the condensation end (102) will be condensed and released The latent heat of vaporization, and then through gravity or the capillary structure in the tube (11), the working fluid is returned to the evaporation end (101). Through the heat transfer of the working fluid, its thermal conductivity can be tens to hundreds of times higher than that of copper, and the Waste heat recovery.

At present, the common design of heat pipe exchangers in industrial systems is shown in the second figure. Most of them are made of stainless steel or carbon steel heat pipes (10) and heat sinks (15). However, the application of low temperature waste heat recovery will face many challenges. , in which the exhaust gas of heat recovery contains water vapor, which will deposit corrosive solids and liquids on the surface of the heat pipe exchanger after condensation, resulting in corrosion of the surface of the heat pipe exchanger, which requires the use of high-grade materials or frequent replacement of heat pipe exchanger components. In addition, due to the low temperature difference of low-temperature waste heat and the poor thermal conductivity of the heat pipe (10) made of stainless steel or carbon steel heat pipe, if it is made into fins, the efficiency of the heat sink (15) will also be poor. A large amount of heat exchange area is required, which will lead to a substantial increase in the overall cost, volume and weight.

In other words, since the traditional heat pipe (10) manufacturing process is increased, and degassing, filling and sealing must be carried out separately, the cost is not easy to reduce. The blockage is often cleaned and other problems, and its efficiency is reduced. If the above problems can be effectively overcome, the low-temperature waste heat recovery modules will be widely popularized, and the energy efficiency will be improved.

In view of this, in-depth discussion on the problems existing in the above-mentioned conventional heat pipe exchangers, and through years of R&D experience in related industries, actively seeking solutions, through continuous research and trial production, finally successfully developed a The heat pipe heat exchanger can overcome the troubles and inconveniences of the prior art due to the difficult detection operation.

Therefore, the main purpose of the present invention is to provide a heat pipe heat exchanger, It can generate a large amount of surrounding area, and use the surface of the heat pipe as a heat exchange path, so that the low-temperature waste heat recovery module can be recycled in a large amount, thereby improving the energy efficiency.

In addition, another main objective of the present invention is to provide a heat pipe heat exchanger, which does not need to make additional fins on the surface of the heat pipe, can avoid the deposition of corrosive solids and liquids on the surface of the fins, and the interface between the heat pipe and the heat pipe. The problem of corrosion damage.

Furthermore, another main purpose of the present invention is to provide a heat pipe heat exchanger, which can effectively simplify the structure, is easy to manufacture, and only needs to be filled once, which can effectively reduce the manufacturing cost.

Based on this, the present invention mainly achieves the aforementioned purpose and its effect through the following technical means, which is composed of a heat-conducting elbow connected vertically on a heat-insulating member, and the heat-pipe heat exchanger is located on both sides of the heat-insulating member. are defined as a high-pressure evaporating end and a low-pressure condensing end, respectively;

The said connecting and heat conducting elbow has an incoming pipe section, at least one up-bending section, at least a straight-through section, at least one down-bending section and an outgoing pipe section, wherein the incoming pipe section can be connected to the adjacent first up-bending section, and the outgoing section is The pipe section is connected to the last downward bending section, and the two ends of each straight section are respectively connected to the corresponding ends of the adjacent upper and lower bending sections, and each of the communicating heat conduction elbows has a communicating pipe inside.

Through the specific implementation of the aforementioned technical means, the heat pipe heat exchanger of the present invention can be connected to the heat conduction elbow in a single-tube communication design. Among the current recoverable waste heat, low-temperature waste heat has the highest potential. At the same time, the connected heat conduction elbow system of the present invention The surface of the metal tube is used for heat energy transfer, and there is no problem of depositing corrosive solids and liquids on the surface after condensation. It does not require the use of high-end materials or frequent replacement of heat exchanger components. The overall cost, volume and weight can make the low-temperature waste heat recovery module widely popular, improve the energy efficiency, thus enhance its practicability, and further improve its added value and economic benefits.

And the present invention utilizes the following technical means to further achieve the aforementioned purpose and efficacy; such as:

The communicating and heat-conducting elbows are made of stainless steel pipes.

The connecting and heat conducting elbow is made of carbon steel pipe.

The connecting and heat conducting elbow is made of copper pipe.

A capillary structure may be formed on the inner wall of the pipe communicating with the heat conducting elbow.

The heat-pipe heat exchanger is provided with two or more communicating heat-conducting elbows on the heat insulating element.

In order to enable your examiners to further understand the structure, features and other purposes of the present invention, the following are some preferred embodiments of the present invention, which are described in detail below with the accompanying drawings, and at the same time, those who are familiar with the technical field can implement them in detail. .

10: heat pipe

101: Evaporating end

102: Condensing end

11: capillary structure

15: heat sink

20: Insulation board

50: Heat pipe heat exchanger

501: Evaporation end

502: Condensing end

60: Connect the heat conduction elbow

61: Incoming Pipe Section

62: Upward bend

63: Straight-through section

64: Downward Bend

65: Outgoing section

66: Pipes

68: capillary structure

70: Thermal insulation

Figure 1: The schematic diagram of the structure of the conventional heat pipe exchanger, for explaining its components and composition state.

Figure 2: Schematic diagram of the cross-section of the heat pipe of the conventional heat pipe exchanger to illustrate its working principle.

Figure 3: It is a schematic view of the appearance of a preferred embodiment of the heat pipe heat exchanger of the present invention, for explaining its constituent elements and constituent states.

Figure 4: It is a schematic side view of a preferred embodiment of the heat pipe heat exchanger of the present invention.

Figure 5: It is a schematic diagram of the experimental results of the heat pipe heat exchanger of the present invention in actual operation, which is used to illustrate its heat recovery under different air volumes and operating temperatures.

Figure 6: It is a schematic diagram of the next experimental result of the heat pipe heat exchanger of the present invention in actual operation, for explaining its thermal conductivity.

Figure 7: Another experimental result of the actual operation of the heat pipe heat exchanger of the present invention Schematic diagram of the fruit to illustrate its energy efficiency.

The present invention is a heat pipe heat exchanger. In the specific embodiment of the present invention and its components illustrated in the accompanying drawings, all references to front and rear, left and right, top and bottom, upper and lower, and horizontal and vertical, It is only used for convenience of description and is not intended to limit the present invention, nor to limit its components to any position or spatial orientation. The dimensions specified in the drawings and the description can be changed according to the design and requirements of the present invention without departing from the scope of the patent application of the present invention.

The main structure of the heat pipe heat exchanger of the present invention is shown in the third and fourth figures. The heat pipe heat exchanger (50) is vertically provided with one or more communicating heat conduction elbows on a heat insulating member (70). (60), the heat pipe heat exchanger (50) is defined as a high-pressure evaporating end (501) and a low-pressure condensing end (502) on both sides of the heat insulator (70), wherein the high-pressure evaporating end ( 501) can be used for waste heat input, and the low-pressure condensing end (502) can be used for heat output, so that the waste heat can be quickly recovered, thereby improving energy efficiency;

The connecting and heat-conducting elbow (60) is made of stainless steel, carbon steel or copper. At least a straight through section (63), at least a lower bend section (64) and an outlet pipe section (65), wherein the inlet pipe section (61) can be connected to the adjacent first upper bend section (62), and the outlet pipe section (65) ) is connected to the last lower bending section (64), and the two ends of each straight section (63) are respectively connected to the corresponding ends of the adjacent upper and lower bending sections (62, 64), so that each of the connected heat conduction elbows (60) forming a continuous elbow structure arranged in a matrix, and each of the communicating heat conducting elbows (60) has a communicating pipe (66) inside, and the inner wall of the pipe (66) communicating with the heat conducting elbow (60) can be formed There is a capillary structure (68) for filling working fluid from one end of the incoming pipe section (61) or the outgoing pipe section (65) of the communicating heat conduction elbow (60), and allowing the two ends of the heat pipe heat exchanger (50) to enter the pipe. , outlet section (61, 65) to seal;

Thereby, the structure constitutes a heat pipe heat exchanger structure that can quickly recover waste heat and improve energy efficiency.

When the present invention is used in practice, as shown in Figures 3, 5, 6 and 7, the inner wall of each of the pipes (66) of the heat pipe heat exchanger (50) communicating with the heat conducting elbows (60) is provided with The capillary structure (68), when each of the pipes (66) communicating with the heat conduction elbow (60) is filled with working fluid, so that the heat transfer of latent heat and sensible heat can be carried out, so that the heat conduction of the heat pipe heat exchanger (50) is communicated. The evaporating end (501) of the elbow (60) is heated so that the working fluid undergoes a phase change to the condensing end (502), and the working fluid is heated to produce a nucleate boiling phenomenon, and new bubbles will be generated and split inside, which will cause the connection and heat conduction. The elbow (60) has pressure pulses at both ends of the evaporation end (501) and the condensation end (502) of the heat pipe heat exchanger (50). Compared with the traditional heat pipe, the present invention can generate a large amount of surrounding area to communicate with the heat conduction elbow (60). ) the surface of the metal tube is used as a heat exchange path, and there is no need to make additional heat dissipation fins on the surface (as shown in the first and second pictures) as a conventional heat pipe, so as to avoid the deposition of corrosive solids and liquids on the surface of the heat dissipation fins And the problem of corrosion and damage of the interface with the heat transfer pipe, and the traditional heat transfer pipe must be degassed, filled and sealed separately, resulting in difficult cost reduction.

After the actual operation of the present invention, it can be known from the relevant experimental results in Figures 5, 6 and 7 that when the operating temperature of the heat pipe heat exchanger (50) reaches 160°C, its equivalent thermal conductivity is higher than 10000W/m-K, The total heat exchange capacity is about 7kW, so the design of the heat pipe heat exchanger (50) of the present invention has the advantages of low-cost manufacture of a heat recovery system and easier maintenance, etc., and the waste heat recovery efficiency of the heat pipe heat exchanger (50) of the present invention up to 70%.

Through the above-mentioned design and description, the heat pipe heat exchanger of the present invention can utilize the connecting heat conduction elbow (60) for waste heat recovery. The highest is low-temperature waste heat, while the connection of the present invention The conduction and heat transfer elbow (60) uses the surface of the metal pipe to transfer heat energy, and there is no need to use radiating fins as conventional, so the heat pipe heat exchanger (50) of the present invention will not deposit corrosive solids and liquids after condensation. surface problems, without using high-grade materials or frequent replacement of heat exchanger components, and at the same time, due to the good effect of low-temperature waste heat recovery, without the need for a large amount of heat exchange area, the overall cost, volume and weight can be effectively reduced. The widespread popularity of waste heat recovery modules improves energy efficiency and greatly enhances its practicability.

From this, it can be understood that the present invention is an excellent creation, in addition to effectively solving the problems faced by habitual users, it also greatly improves the efficacy, and there is no identical or similar product creation or public use in the same technical field. , and at the same time has the enhancement of efficacy, so the present invention has met the requirements of "novelty" and "progressiveness" of the invention patent, and the application for the invention patent is filed in accordance with the law.

50: Heat pipe heat exchanger

501: Evaporation end

502: Condensing end

60: Connect the heat conduction elbow

61: Incoming Pipe Section

62: Upward bend

63: Straight-through section

64: Downward Bend

65: Outgoing section

66: Pipes

68: capillary structure

70: Thermal insulation

Claims (6)

A heat-pipe heat exchanger, which is composed of a heat-conducting elbow connected vertically on a heat-insulating piece, and the heat-pipe heat exchanger is defined as a high-pressure evaporating end and a low-pressure condensing end on both sides of the heat-insulating piece; The said connecting and heat conducting elbow has an incoming pipe section, at least one up-bending section, at least a straight-through section, at least one down-bending section and an outgoing pipe section, wherein the incoming pipe section can be connected to the adjacent first up-bending section, and the outgoing section is The pipe section is connected to the last downward bending section, and the two ends of each straight section are respectively connected to the corresponding ends of the adjacent upper and lower bending sections, and each of the communicating heat conduction elbows has a communicating pipe inside; Thereby, one end of the connecting heat conducting elbow is filled with working fluid at one time, the evaporating end of the high pressure can be used for waste heat input, and the condensing end of low pressure can be used for heat output. Heat pipe heat exchanger structure for energy efficiency. The heat pipe heat exchanger as claimed in claim 1, wherein the communicating heat conduction elbow is made of stainless steel pipe. The heat pipe heat exchanger as claimed in claim 1, wherein the communicating heat conduction elbow is made of carbon steel pipe. The heat pipe heat exchanger as claimed in claim 1, wherein the communicating heat conduction elbow is made of copper pipe. The heat pipe heat exchanger according to claim 1, wherein a capillary structure can be formed on the inner wall of the pipe communicating with the heat conducting elbow. The heat pipe heat exchanger according to claim 1, wherein the heat pipe heat exchanger is provided with two or more communicating heat conduction elbows on the heat insulating member.

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