地球一小时的相关争议

2025-02-14 01:11:41
推荐回答(1个)
回答1:

根据化学原理,“关灯点蜡烛”实际上排放更多的碳元素,而且蜡烛燃烧不充分产生一氧化碳等有害气体(蜡烛燃烧的臭味和黑烟每个人都很清楚)。因此,“关灯点蜡烛”是没有科学常识的体现,作秀成分多于实际意义。
宣传地球一小时等活动所排放的碳,已经远远大于关灯1小时所节约的碳,作秀成分多于实际意义。
有部分反对者通过理论计算得出关灯一小时会对电网造成冲击,但未有详细数据公布。
另有部分反对者认为这是形式主义,关灯一小时不会节约多少电,不如关闭空调、电视等实在。而支持者认为反对者是误解了地球一小时活动初衷,活动本身是为了唤起人们的环保意识,而非为了靠这一小时节电。
而电力工作者认为这是对电力系统不了解的环保团体,自以为是地搞出了这么个劳民伤财的环保秀。
在我国的发电厂主要以煤电为主,发电过程主要是锅炉烧煤-产生蒸汽-蒸汽推动汽轮机切割磁感线做功-产生电能。电网的用电负荷直接决定了汽轮机切割磁感线的阻力。
如果瞬时用电负荷骤降,主要危害表现在两点: 阻力下降,气轮机转速升高,控制系统必须调节蒸汽阀门,减小进气量。但锅炉的燃烧存在延时惯性,温度不能马上降低,故蒸汽堆积在管道内,造成管压骤升,极易引起安全事故。 锅炉的负荷存在下限,一般如果发电负荷低于设计负荷的30%,锅炉就容易熄火,此时一般需要往锅炉投入燃油以防止熄火,这种情况多在夜间发生。晚上8:30~9:00这段时间内,工厂基本停工,主要耗电大户就是民用,此时锅炉已经处于低负荷运转状态了,再降低用电负荷,锅炉熄火的可能很大。锅炉的再启动是非常麻烦的。 国家电网公司肯定听到风头,然后有意识的关掉若干电力机组的,火力发电机组关掉新开启浪费的能源其实更多。
节约用电最有效、最实际的办法,是每个人都随时随地的注意节约。而不是这样大家一起,作一场环保秀的游戏。这个宣传是有意义的,但是我们没有必要都在这个时间去熄灯一小时,这样只是造成更大的浪费。

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