CN1794557A - 一种发动机排气管余热发电方法及装置 - Google Patents
一种发动机排气管余热发电方法及装置 Download PDFInfo
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- CN1794557A CN1794557A CN 200510017221 CN200510017221A CN1794557A CN 1794557 A CN1794557 A CN 1794557A CN 200510017221 CN200510017221 CN 200510017221 CN 200510017221 A CN200510017221 A CN 200510017221A CN 1794557 A CN1794557 A CN 1794557A
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- 239000003570 air Substances 0.000 claims abstract description 9
- 239000002918 waste heat Substances 0.000 claims abstract description 7
- 238000006243 chemical reactions Methods 0.000 claims description 11
- 239000007789 gases Substances 0.000 claims description 11
- 210000003491 Skin Anatomy 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000005755 formation reactions Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000010521 absorption reactions Methods 0.000 abstract 2
- 239000010410 layers Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 materials Substances 0.000 description 2
- 239000011901 water Substances 0.000 description 2
- 229910052783 alkali metals Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004065 semiconductors Substances 0.000 description 1
- 230000000087 stabilizing Effects 0.000 description 1
- OCGWQDWYSQAFTO-UHFFFAOYSA-N tellanylidenelead Chemical compound 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Classifications
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- Y02T10/16—
Abstract
Description
技术领域
本发明公开一种发动机排气管余热发电方法,同时还提供了适用于该方法的发电装置,属于车船等发动机余热的再利用及热电转换技术领域。
背景技术
目前,汽车发动机的动力转换效率仅在40%左右,剩余60%左右的能量都以热量方式散发到空气中,造成了巨大的能源浪费,因此,人们常常将汽车排气管的余热通过管道接到车厢内的散热器上,利用其余热取暖,即经济又很方便。但这部分能量在不需要取暖的时候,就白白浪费掉了。如果我们把这部分能量利用起来,冬天取暖、夏天制冷,那么将会节约大量的能源,定会带来可观的经济效益和良好的社会效益。近年来,由于热电材料性能的不断提升,加之全球性的能源危机及环境保护的需要,利用热电转换技术,进一步将大量废热回收转为电能的方式,普遍得到日、美、欧等发达国家的重视。这种热电转换装置,工作时无噪音、无排弃物,和太阳能、风能、水能等二次能源的应用一样,对环境没有污染,性能稳定可靠,使用寿命长,具有广泛的应用前景。
发明内容
本发明提供一种发动机排气管余热发电方法,有效的利用发动机排气管的余热,节约了宝贵的能源。
本发明还公开了利用上述方法设计的发电装置,用于车辆发动机的余热发电。
本发明的发电方法如下:把热电转换器件制成与发动机排气管相配合连接的装置,将转换器的高温端直接放入排气管内,使其充分吸收热量,利用空气流通对热电转换器的低温端进行冷却,高温和自然空气形成温度差,完成发电机余热的发电功能。
适用于本发明方法的技术解决方案如下:发电装置的本体为管状结构,其管壁为热电转换器主体,中部为排气管路通道,外层设有低温冷却端,内壁设有高温吸热端,电流输出端子分别接低温冷却端和高温吸热端。
所述的热电转换器件可选择:温差半导体、热电子发电器、光伏发电器和碱金属热电转换器等。
现有热电转换器件转换效率可以达到30%,最大功率可以达到数百瓦。当汽车以60km/h的速度行使时,排气管的热量转换效率达到1/10以上时,用960个碲化铅热电偶在正常行使的汽车上,可以发出350W的电力,相当于一般车用发电机输出功率。
本发明的积极效果在于:利用车船发动机排气管800℃以上的高温度和汽车发动机冷却水的80℃左右温度进行热能发电,可以使能源得到再利用,节约能耗。发动机的温度,尤其是排气管的高温和自然空气形成温度差,完全满足了热电转换的热源条件,利用这两者的温差发电,能源稳定,没有成本。
附图说明
图1为本发明风冷式热电器件结构原理图。
图2为本发明风冷式热电器件结构剖视图。
图3为本发明水冷式热电器件结构原理图。
具体实施方式
现在市场上的这些器件的工作原理各不相同,适用的热源温度亦有差异,但都能将热能转换成电能,在一定的温度范围内,转换器的输出电流与器件冷热两端温度差大小成正比,为了提高温度差,并且有效地利用排气管排出气体的热能,可以用如下办法解决:实施例1根据图1所示,发电装置的本体2为管状结构,其管壁为热电转换器主体2,中部为排气管路通道3,外层设有低温冷却端1,内壁设有高温吸热端4,低温冷却端1和高温吸热端4均设计成翅片型结构,利用车体及空气对热电转换器的低温冷却端1进行冷却,电流输出端子5分别接低温冷却端1和高温吸热端4。
实施例2参照图3,本实用新型的低温冷却端1还可设计成水冷式结构,在热电转换器主体2与低温冷却端1之间设有冷却水通道6,可与发动机的水循环冷却系统连接,船用发电装置低温端可以直接用水进行冷却,更加方便实用。
实施例3将上述材料按照车船排气管的形状做成圆形或者椭圆形等不同形状的热电转换装置(参见图2),安装在车船上即可使用。输出的电力可以直接充入蓄电池或被其它电器利用。
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CN102080591A (zh) * | 2011-01-28 | 2011-06-01 | 戚荣生 | 混合动力汽车发动机尾气减排发电系统 |
WO2012127386A1 (en) * | 2011-03-18 | 2012-09-27 | Basf Se | Exhaust train having an integrated thermoelectric generator |
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WO2012127386A1 (en) * | 2011-03-18 | 2012-09-27 | Basf Se | Exhaust train having an integrated thermoelectric generator |
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CN109274292A (zh) * | 2018-11-19 | 2019-01-25 | 四川大学 | 一种利用废气余热的温差发电系统 |
CN110242389A (zh) * | 2019-04-30 | 2019-09-17 | 南京交通职业技术学院 | 柴油发动机的尾气废热发电与净化处理装置及方法 |
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