WO2022095008A1 - 一种汽车排气系统余热回收利用装置及回收利用方法 - Google Patents

一种汽车排气系统余热回收利用装置及回收利用方法 Download PDF

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WO2022095008A1
WO2022095008A1 PCT/CN2020/127430 CN2020127430W WO2022095008A1 WO 2022095008 A1 WO2022095008 A1 WO 2022095008A1 CN 2020127430 W CN2020127430 W CN 2020127430W WO 2022095008 A1 WO2022095008 A1 WO 2022095008A1
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pipe
waste heat
power generation
exhaust system
chimney
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PCT/CN2020/127430
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English (en)
French (fr)
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陈松
顾卫杰
江晓莹
任萍丽
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常州机电职业技术学院
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Priority to PCT/CN2020/127430 priority Critical patent/WO2022095008A1/zh
Publication of WO2022095008A1 publication Critical patent/WO2022095008A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means

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  • the invention belongs to the technical field of waste heat recovery, and in particular relates to a waste heat recovery and utilization device of an automobile exhaust system and a recovery and utilization method.
  • the present invention proposes a waste heat recovery and utilization device and a recovery and utilization method of an automobile exhaust system.
  • a waste heat recovery and utilization device of an automobile exhaust system which includes a chimney, a hot air pipe, a cold air pipe, an air intake pipe, an exhaust pipe, a heat dissipation pipe, a heat sink and a thermoelectric power generation sheet.
  • the front end of the chimney is fixedly connected with the hot air pipe
  • the tail end of the chimney is fixedly connected with the cold air pipe
  • the hot air pipe is fixedly connected with the intake pipe
  • the cold air pipe is fixedly connected with the exhaust pipe
  • the chimney is fixedly connected
  • the middle part of the heat dissipation pipe is fixedly sleeved with the heat dissipation pipe
  • the top and bottom of the heat dissipation pipe are fixedly connected with a plurality of heat dissipation fins
  • the front and back of the heat dissipation pipe are provided with thermoelectric power generation sheets
  • one end of the thermoelectric power generation sheet is close to the heat sink.
  • the air duct is fixedly connected to the chimney through the fixing block
  • the other end of the thermoelectric power generation sheet is fixedly connected to the heat dissipation pipe
  • the thermoelectric power generation sheet is connected to the vehicle battery through a wire.
  • the heat dissipation pipe is made of aluminum heat dissipation sleeve.
  • the heat dissipation pipe is a rectangular body structure with an inner circle and an outer square.
  • both ends of the heat dissipation pipe are connected to the chimney through fasteners, and the fasteners are fastening bolts made of cast iron material.
  • the heat sink is made of graphene.
  • thermoelectric power generation sheet is a semiconductor thermoelectric power generation sheet.
  • thermoelectric power generation sheet is respectively bonded and fixed to the heat dissipation pipe and the fixing block by means of thermally conductive silica gel.
  • the fixing block is made of an aluminum metal block, and the fixing block is bonded and fixed to the chimney through thermally conductive silica gel.
  • the chimney, hot air pipe, cold air pipe, air intake pipe and exhaust pipe are all made of 304 stainless steel.
  • the invention also provides a waste heat recovery and utilization method of a waste heat recovery and utilization device of an automobile exhaust system, which comprises the following steps:
  • Step 1 The waste heat recovery and utilization device is installed on the car, so that the intake pipe is connected to the exhaust port of the car engine;
  • Step 2 After the car is running, the flue gas generated by the car engine is injected into the intake pipe through the exhaust port, and the flue gas passes through the hot air pipe, the chimney and the cold air pipe in turn, and finally is discharged from the exhaust pipe;
  • Step 3 When the flue gas enters the hot air pipe, the heat is conducted to one end of the thermoelectric power generation sheet through the fixing block and heats it.
  • the heat When the flue gas enters the inside of the chimney, the heat is dissipated into the air through the heat dissipation pipe and the heat dissipation sheet to make the thermoelectric power generation.
  • the other end of the sheet cannot absorb or can only absorb a small amount of heat, and the two ends of the thermoelectric power generation sheet generate a temperature difference, and the temperature difference is used to generate electricity;
  • Step 4 The on-board battery is charged by the current generated by the thermoelectric power generation sheet, and the on-board battery is controlled by the on-board controller to supply power to the on-board air conditioner, so as to realize the utilization of waste heat of the automobile exhaust system for power generation.
  • the present invention has the beneficial effects that the present invention solves the problem of low waste heat recovery efficiency of the existing exhaust gas waste heat recovery device.
  • the invention realizes the heat dissipation of the flue gas inside the chimney by installing the heat dissipation pipe and the heat dissipation fin on the chimney, and utilizes the excellent thermal conductivity of the aluminum material and the graphene material to realize the efficient heat dissipation, so that the temperature of one end of the semiconductor thermoelectric power generation sheet is lower, The other end of the semiconductor thermoelectric power generation sheet is in contact with the hot air pipe through the fixed block, and absorbs the heat conducted by the hot air pipe to heat up rapidly.
  • the temperature difference between the two ends of the semiconductor thermoelectric power generation sheet is large, which can effectively improve the power generation efficiency of the semiconductor thermoelectric power generation sheet. , so as to charge the vehicle battery, and the vehicle controller can supply power to the vehicle air conditioner and other electrical equipment.
  • the invention utilizes the waste heat of the vehicle exhaust to generate electricity, and through the rational design of the waste heat recovery and utilization device, it can improve the two semiconductor thermoelectric power generation chips.
  • the temperature difference between the ends can be improved, so as to improve the power generation efficiency, improve the utilization rate of waste heat recovery, save energy, and facilitate the promotion and use.
  • FIG. 1 is a schematic structural diagram of a waste heat recovery and utilization device for an automobile exhaust system according to the present invention
  • FIG. 2 is a schematic diagram of a method for recycling waste heat of an automobile exhaust system according to the present invention.
  • a waste heat recovery and utilization device for an automobile exhaust system which includes a chimney 1, a hot air duct 2, a cold air duct 3, an air intake duct 4, an exhaust duct 5, a radiating duct 6, and a radiating fin 7 and thermoelectric sheet 8,
  • the front end of the chimney 1 is fixedly connected with the hot air pipe 2
  • the rear end of the chimney 1 is fixedly connected with the cold air pipe 3
  • the hot air pipe 2 is fixedly connected with the air intake pipe 4
  • the cold air pipe 3 is fixedly connected with the exhaust pipe 5
  • the middle part of the chimney 1 is fixedly sleeved with the heat dissipation pipe 6, and the top and bottom of the heat dissipation pipe 6 are fixedly connected with a plurality of heat dissipation fins 7.
  • thermoelectric power generation sheet 8 Both the front and the back are provided with a thermoelectric power generation sheet 8, one end of the thermoelectric power generation sheet 8 is close to the hot air pipe 2 and is fixedly connected with the chimney 1 through the fixing block 9, and the other end of the thermoelectric power generation sheet 8 is fixedly connected with the radiating pipe 6. , the thermoelectric power generation sheet 8 is connected to the vehicle battery through a wire.
  • the heat dissipation pipe 6 is made of aluminum heat dissipation sleeve, which can effectively enhance the temperature difference between the cold and hot ends, thereby improving the power generation efficiency.
  • the radiating pipe 6 is a rectangular structure with an inner circle and an outer square, which facilitates the installation of the radiating fins 7 and the thermoelectric fins 8, increases the contact area between the thermoelectric fins 8 and the radiating pipes 6, and improves the installation stability.
  • Both ends of the heat dissipation pipe 6 are connected to the chimney 1 through fasteners 10, which are fastening bolts made of cast iron material, which can improve the installation stability of the heat dissipation pipe 6 and enhance the stability of power generation.
  • the heat sink 7 is made of graphene and has excellent thermal conductivity.
  • the thermoelectric power generation sheet 8 is a semiconductor thermoelectric power generation sheet
  • the fixing block 9 is made of an aluminum metal block
  • the fixing block 9 is bonded and fixed to the chimney 1 through thermally conductive silica gel.
  • One end of 8 is inserted into the sleeve groove, and the thermoelectric power generation sheet 8 is respectively bonded and fixed with the heat dissipation pipe 6 and the fixing block 9 through the thermal conductive silica gel.
  • the chimney 1, the hot air pipe 2, the cold air pipe 3, the intake pipe 4 and the exhaust pipe 5 are all made of 304 stainless steel, which improves the corrosion resistance.
  • the present embodiment is a waste heat recovery and utilization method of a waste heat recovery and utilization device of an automobile exhaust system, which comprises the following steps:
  • Step 1 the waste heat recovery and utilization device is installed on the automobile, so that the intake pipe 4 is connected with the exhaust port of the automobile engine;
  • Step 2 After the car is driven, the flue gas generated by the automobile engine is injected into the intake pipe 4 through the exhaust port, and the flue gas passes through the hot air pipe 2, the chimney 1 and the cold air pipe 3 in turn, and is finally discharged from the exhaust pipe 5;
  • Step 3 When the flue gas enters the hot air pipe 2, the heat is conducted to one end of the thermoelectric sheet 8 through the fixing block 9 and heats it; Dissipate into the air, so that the other end of the thermoelectric power generation sheet 8 cannot absorb or can only absorb a small amount of heat, and the two ends of the thermoelectric power generation sheet 8 generate a temperature difference, and the temperature difference is used to generate electricity;
  • Step 4 The on-board battery is charged by the current generated by the thermoelectric power generation sheet 8, and the on-board battery is controlled by the on-board controller to supply power to the on-board air conditioner, so as to realize the utilization of waste heat of the automobile exhaust system for power generation.
  • the present invention provides a detailed introduction to a waste heat recovery and utilization device for an automobile exhaust system and a method for recycling it.
  • specific examples are used to illustrate the principles and implementations of the present invention.
  • the descriptions of the above embodiments are only It is used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope.
  • the contents of the description should not be construed as limiting the present invention.

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  • Exhaust Silencers (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

一种汽车排气系统余热回收利用装置及回收利用方法，属于余热回收技术领域。解决了现有的尾气余热回收装置余热回收效率低的问题。回收利用装置中烟筒(1)的前端与热风管(2)固定连接，所述烟筒(1)的尾端与冷风管(3)固定连接，所述热风管(2)与进气管(4)固定连接，所述冷风管(3)与排气管(5)固定连接，所述烟筒(1)的中部与散热管(6)固定套接，所述散热管(6)的顶部和底部均固定连接有多个散热片(7)，所述散热管(6)的正面和背面均设置有温差发电片(8)，所述温差发电片(8)的一端靠近热风管(2)并通过固定块(9)与烟筒(1)固定连接，所述温差发电片(8)的另一端与散热管(6)固定连接，所述温差发电片(8)通过导线与车载蓄电池相连。它主要用于汽车排气系统的余热回收利用。

Description

一种汽车排气系统余热回收利用装置及回收利用方法 技术领域
本发明属于余热回收技术领域，特别是涉及一种汽车排气系统余热回收利用装置及回收利用方法。
背景技术
随着人们生活水平的日益提高，汽车逐渐变成家庭生活中不可或缺的一部分，它在给人们出行带来方便的同时，也随之带来一系列问题，比如：能源浪费、环境污染等；燃料燃烧产生的热量通过各种途径损失很多，导致汽车的热效率较低，其中汽车尾气带走了很大一部分，约占总热量的三分之一，而且其温度高达几百摄氏度，因而汽车尾气具有极高的回收利用价值；目前对于汽车尾气回收利用的方法和装置层出不穷，大部分以常见的换热器为基础来直接转化和利用这部分热量，而且现有的尾气余热回收装置存在回收效率低的问题。
发明内容
本发明为了解决现有技术中的问题，提出一种汽车排气系统余热回收利用装置及回收利用方法。
为实现上述目的，本发明采用以下技术方案：一种汽车排气系统余热回收利用装置，它包括烟筒、热风管、冷风管、进气管、排气管、散热管、散热片和温差发电片，所述烟筒的前端与热风管固定连接，所述烟筒的尾端与冷风管固定连接，所述热风管与进气管固定连接，所述冷风管与排气管固定连接，所述烟筒的中部与散热管固定套接，所述散热管的顶部和底部均固定连接有多个散热片，所述散热管的正面和背面均设置有温差发电片，所述温差发电片的一端靠近热风管并通过固定块与烟筒固定连接，所述温差发电片的另一端与散热管固定连接，所述温差发电片通过导线与车载蓄电池相连。
更进一步的，所述散热管铝制散热套管。
更进一步的，所述散热管为内圆外方的矩形体结构。
更进一步的，所述散热管的两端均通过紧固件与烟筒相连，所述紧固件为铸铁材料制作的紧固螺栓。
更进一步的，所述散热片为石墨烯材质。
更进一步的，所述温差发电片为半导体温差发电片。
更进一步的，所述温差发电片通过导热硅胶分别与散热管和固定块粘接固定。
更进一步的，所述固定块铝制金属块，所述固定块通过导热硅胶与烟筒粘接固定。
更进一步的，所述烟筒、热风管、冷风管、进气管和排气管均为304不锈钢材质。
本发明还提供了一种汽车排气系统余热回收利用装置的余热回收利用方法，它包括以下步骤：
步骤一：余热回收利用装置安装在汽车上，使进气管与汽车发动机的排气端口相连；
步骤二：汽车行驶后，汽车发动机所产生的烟气经由排气端口注入进气管，烟气依次经过热风管、烟筒和冷风管，最终从排气管排出；
步骤三：烟气进入热风管内时，热量通过固定块传导至温差发电片的一端并对其进行加热，烟气进入烟筒内部时，通过散热管和散热片将热量散发至空气中，使温差发电片的另一端吸收不到或只能吸收少量热量，温差发电片的两端产生温差，利用温差进行发电；
步骤四：通过温差发电片产生的电流对车载蓄电池进行充电，通过车载控制器控制车载蓄电池为车载空调供电，实现汽车排气系统余热发电的利用。
与现有技术相比，本发明的有益效果是：本发明解决了现有的尾气余热回收装置余热回收效率低的问题。本发明通过在烟筒上安装散热管和散热片，实现对烟筒内部烟气的散热，利用铝材料和石墨烯材料的优良导热性，实现高效散热，使得半导体温差发电片的一端的温度较低，而半导体温差发电片的另一端通过固定块与热风管接触，吸收热风管所传导的热量而快速升温，半导体温差发电片的两端温差较大，能够有效提高半导体温差发电片的发电效率，从而为车载蓄电池进行充电，通过车载控制器可以为车载空调等用电设备进行供电，本发明利用汽车尾气的余热进行发电，通过对余热回收利用装置的合理设计，能够提高半导体温差发电片两端的温差，从而提高发电效率，提高余热回收利用率，节约能源，便于推广使用。
附图说明
图1为本发明所述的一种汽车排气系统余热回收利用装置结构示意图；
图2为本发明所述的一种汽车排气系统余热回收利用方法示意图。
1-烟筒，2-热风管，3-冷风管，4-进气管，5-排气管，6-散热管，7-散热片，8-温差发电片，9-固定块，10-紧固件。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地阐述。
参见图1-2说明本实施方式，一种汽车排气系统余热回收利用装置，它包括烟筒1、热风管2、冷风管3、进气管4、排气管5、散热管6、散热片7和温差发电片8，所述烟 筒1的前端与热风管2固定连接，所述烟筒1的尾端与冷风管3固定连接，所述热风管2与进气管4固定连接，所述冷风管3与排气管5固定连接，所述烟筒1的中部与散热管6固定套接，所述散热管6的顶部和底部均固定连接有多个散热片7，所述散热管6的正面和背面均设置有温差发电片8，所述温差发电片8的一端靠近热风管2并通过固定块9与烟筒1固定连接，所述温差发电片8的另一端与散热管6固定连接，所述温差发电片8通过导线与车载蓄电池相连。
本实施例散热管6铝制散热套管，可有效增强冷热两端的温差，以此提高发电效率。散热管6为内圆外方的矩形体结构，便于散热片7和温差发电片8的安装，提高温差发电片8与散热管6的接触面积，提高安装稳定性。散热管6的两端均通过紧固件10与烟筒1相连，紧固件10为铸铁材料制作的紧固螺栓，可以提高散热管6的安装稳定性，增强发电的稳定性。散热片7为石墨烯材质，具有优越的导热性。温差发电片8为半导体温差发电片，固定块9铝制金属块，固定块9通过导热硅胶与烟筒1粘接固定，固定块9上开设有用于安装温差发电片8的套槽，温差发电片8的一端插入套槽内，温差发电片8通过导热硅胶分别与散热管6和固定块9粘接固定。烟筒1、热风管2、冷风管3、进气管4和排气管5均为304不锈钢材质，提高防腐蚀性能。
本实施例为汽车排气系统余热回收利用装置的余热回收利用方法，它包括以下步骤：
步骤一：余热回收利用装置安装在汽车上，使进气管4与汽车发动机的排气端口相连；
步骤二：汽车行驶后，汽车发动机所产生的烟气经由排气端口注入进气管4，烟气依次经过热风管2、烟筒1和冷风管3，最终从排气管5排出；
步骤三：烟气进入热风管2内时，热量通过固定块9传导至温差发电片8的一端并对其进行加热，烟气进入烟筒1内部时，通过散热管6和散热片7将热量散发至空气中，使温差发电片8的另一端吸收不到或只能吸收少量热量，温差发电片8的两端产生温差，利用温差进行发电；
步骤四：通过温差发电片8产生的电流对车载蓄电池进行充电，通过车载控制器控制车载蓄电池为车载空调供电，实现汽车排气系统余热发电的利用。
以上对本发明所提供的一种汽车排气系统余热回收利用装置及回收利用方法，进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种汽车排气系统余热回收利用装置，其特征在于：它包括烟筒(1)、热风管(2)、冷风管(3)、进气管(4)、排气管(5)、散热管(6)、散热片(7)和温差发电片(8)，所述烟筒(1)的前端与热风管(2)固定连接，所述烟筒(1)的尾端与冷风管(3)固定连接，所述热风管(2)与进气管(4)固定连接，所述冷风管(3)与排气管(5)固定连接，所述烟筒(1)的中部与散热管(6)固定套接，所述散热管(6)的顶部和底部均固定连接有多个散热片(7)，所述散热管(6)的正面和背面均设置有温差发电片(8)，所述温差发电片(8)的一端靠近热风管(2)并通过固定块(9)与烟筒(1)固定连接，所述温差发电片(8)的另一端与散热管(6)固定连接，所述温差发电片(8)通过导线与车载蓄电池相连。
  2. 根据权利要求1所述的一种汽车排气系统余热回收利用装置，其特征在于：所述散热管(6)铝制散热套管。
  3. 根据权利要求1所述的一种汽车排气系统余热回收利用装置，其特征在于：所述散热管(6)为内圆外方的矩形体结构。
  4. 根据权利要求1所述的一种汽车排气系统余热回收利用装置，其特征在于：所述散热管(6)的两端均通过紧固件(10)与烟筒(1)相连，所述紧固件(10)为铸铁材料制作的紧固螺栓。
  5. 根据权利要求1所述的一种汽车排气系统余热回收利用装置，其特征在于：所述散热片(7)为石墨烯材质。
  6. 根据权利要求1所述的一种汽车排气系统余热回收利用装置，其特征在于：所述温差发电片(8)为半导体温差发电片。
  7. 根据权利要求1所述的一种汽车排气系统余热回收利用装置，其特征在于：所述温差发电片(8)通过导热硅胶分别与散热管(6)和固定块(9)粘接固定。
  8. 根据权利要求1所述的一种汽车排气系统余热回收利用装置，其特征在于：所述固定块(9)铝制金属块，所述固定块(9)通过导热硅胶与烟筒(1)粘接固定。
  9. 根据权利要求1所述的一种汽车排气系统余热回收利用装置，其特征在于：所述烟筒(1)、热风管(2)、冷风管(3)、进气管(4)和排气管(5)均为304不锈钢材质。
  10. 一种如权利要求1所述的汽车排气系统余热回收利用装置的余热回收利用方法，其特征在于：它包括以下步骤：
    步骤一：余热回收利用装置安装在汽车上，使进气管(4)与汽车发动机的排气端口相连；
    步骤二：汽车行驶后，汽车发动机所产生的烟气经由排气端口注入进气管(4)，烟气依次经过热风管(2)、烟筒(1)和冷风管(3)，最终从排气管(5)排出；
    步骤三：烟气进入热风管(2)内时，热量通过固定块(9)传导至温差发电片(8)的一端并对其进行加热，烟气进入烟筒(1)内部时，通过散热管(6)和散热片(7)将热量散发至空气中，使温差发电片(8)的另一端吸收不到或只能吸收少量热量，温差发电片(8)的两端产生温差，利用温差进行发电；
    步骤四：通过温差发电片(8)产生的电流对车载蓄电池进行充电，通过车载控制器控制车载蓄电池为车载空调供电，实现汽车排气系统余热发电的利用。
PCT/CN2020/127430 2020-11-09 2020-11-09 一种汽车排气系统余热回收利用装置及回收利用方法 WO2022095008A1 (zh)

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