CityGas管道气成份
昨晚才知道，坡上管道燃气不是天然气，而叫town gas，主要成份是氢气！
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CityGas管道气成份
有一次开着煤气火灭了
怕中毒，诚惶诚恐的查了一次。说氢气是不准确的，里面主要是碳氢化合物，CH4, C2H6,等等，比重略低于空气，排出后往上飘，不存在爆炸的风险。燃烧时也更加完全。
这估计也是为什么坡上的管道做饭炒菜锅底不会变黑的原因。
这估计也是为什么坡上的管道做饭炒菜锅底不会变黑的原因。
大家请看EMA官方文件
http://www.ema.gov.sg/cmsmedia/Licensees/Gas_Supply_Code.pdf
第13页，
7.1 Gas Specification
Typical Town Gas Composition
Hydrogen 53.0~65.0
Methane 3.0~20.0
Ethane 0.1~2.0
n-Pentane 1.0~2.7
i-Pentane 1.0~3.7
Carbon Monoxide 2.0~6.0
Carbon Dioxide 11.0~23.0
Nitrogen 2.0~5.5
Oxygen 0.5~1.5
单位体积热值只有天然气的一小半啊！
PS. 坡上天然气的成分甲烷至少要80%.
CityGas 官网也有描述
http://www.citygas.com.sg/forhome/useful-info-2/benefits-of-using-town-gas/
Water vapour represents the bulk of the by-products produced during the combustion of town gas. This is because the main component of town gas is hydrogen and during combustion, hydrogen will react with oxygen in the air to produce heat and water vapour. As a result, town gas emits less carbon dioxide during burning as compared to natural gas and LPG.
Water vapour represents the bulk of the by-products produced during the combustion of town gas. This is because the main component of town gas is hydrogen and during combustion, hydrogen will react with oxygen in the air to produce heat and water vapour. As a result, town gas emits less carbon dioxide during burning as compared to natural gas and LPG.
CityGas 官网也有描述http://www.citygas.com.sg/forhome/useful-info-2/benefits-of-using-town-gas/
Water vapour represents the bulk of the by-products produced during the combustion of town gas. This is because the main component of town gas is hydrogen and during combustion, hydrogen will react with oxygen in the air to produce heat and water vapour. As a result, town gas emits less carbon dioxide during burning as compared to natural gas and LPG.
这里的hydrogen应该指的是氢
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大家请看EMA官方文件http://www.ema.gov.sg/cmsmedia/Licensees/Gas_Supply_Code.pdf
第13页，
7.1 Gas Specification
Typical Town Gas Composition
Hydrogen 53.0~65.0
Methane 3.0~20.0
Ethane 0.1~2.0
n-Pentane 1.0~2.7
i-Pentane 1.0~3.7
Carbon Monoxide 2.0~6.0
Carbon Dioxide 11.0~23.0
Nitrogen 2.0~5.5
Oxygen 0.5~1.5
单位体积热值只有天然气的一小半啊！
PS. 坡上天然气的成分甲烷至少要80%.
(more...)
成分这样写看起来怪怪的。
LPG应该是bentane（C4）和Propane （C3）混合嘛。
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Town gas是煤气
煤气meiqi
我觉得管道气很干净，几乎没有积碳。
反观以前用液化气，烧水壶底往往积碳，时时拂拭犹不免。而换用管道气之后，大为改观，至今2个月，都没有用绿色的海绵片锅底了。
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