天气越来越热了,车子开空调也免不了的,于是很多小伙伴都说:又要开空调费油啊……那么问题来了↓↓↓
开空调为什么费油?
油耗跟什么有关系呢?
空调温度开得越低就越费油?
不开空调开窗会更省油?
1、空调是怎么工作的?
首先,先看看空调的工作原理 —— 冷媒在蒸发箱中气化,吸收热量,使周围空气降温,再由鼓风机把冷空气吹进车内,而气化后的冷媒经压缩机压缩,变成高温高压的气体,经过冷凝器降温后,成为低温高压液体,经干燥瓶和膨胀阀节流降压后再次进入蒸发箱气化,完成一个循环。
2、空调风量大小跟油耗有关系吗?
可以知道,在空调工作的过程中只有鼓风机和压缩机两个家伙是需要消耗能量的。鼓风机是由电机驱动,且功率很小。这电能是靠发电机供应的,而不论你开不开空调都是一直工作的。而压缩机消耗的是发动机的机械能,而机械能来自于燃料燃烧产生的热能。所以空调压缩机的运转,就是空调耗油的根源所在。
换句话说,空调风量的大小是由鼓风机的转速大小决定的,而鼓风机的功率跟油耗并没有直接关系,仅仅是吹风功能是对油耗没有太大影响的。
3、空调温度高低跟油耗有关系吗?
而在制冷的情况下,根据空调的不同,油耗的影响也会不同。目前市面上的汽车空调主要有两种,定排空调与变排空调。
定排空调
简单来说,定排空调就是你这压缩机一启动,它的功率就是固定的,那么不管你温度调高还是调低,它的功率就那样,所以油耗也不变,没有影响。
变排空调
而变排空调的话,压缩机的输出功率会随着温度发生变化,温度越低,输出功率越大,越消耗动力,相对来说油耗会更高。
4、不开空调只开窗会省油吗?
其实不然,如果在车辆速度较低的情况下,开窗户对于风阻没有太大影响,但是当车辆达到了一定的速度以后,开启窗户反而会大大增加风阻系数,风阻变大,一样会对油耗产生影响。
其实基本上只要遵循60/80法则,当汽车速度在60码以下行驶时,只要你受得了,可以为了省钱不开空调,但是速度若超过了80码的时候,开空调反而会没有那么费油。
总结一下,对于定排空调的车子来说,开空调没有办法省油,你一开空调,油耗就固定了;对于变排空调来说,想省油就不要把温度调得太低。
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原创文章,作者:cesifu,如若转载,请注明出处:http://www.cesifu.com/article/27739.html
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