输气站通常包括()。
A.首站
B.压气站
C.加热站
D.分输站
A.首站
B.压气站
C.加热站
D.分输站
在压气站数一定的情况下,各站的出站压力都达到最大工作压力Pmax时,输气管则有最大的输气能力Qmax(即首站出站的最大流量),这个最大流量是由全线的压气站特性和整条输气管各站间管路特性共同决定的。根据式(8-13),对于一条沿线没有分气或进气的输气管,扣除各站的自用气之后,流量是在逐渐减少的。Under the condition of a certain number of compressor stations, when the outbound pressure of each station reaches the maximum working pressure Pmax, the gas transmission pipe has the maximum gas transmission capacity Qmax(i.e. the maximum flow of the first station outbound), which is jointly determined by the characteristics of the compressor station on the whole line and the characteristics of the pipelines between all stations of the whole gas transmission pipe. According to formula (8-13), for a gas pipeline without gas separation or intake along the line, the flow is gradually decreasing after deducting the self-use gas of each station.
A.50%
B.100%
C.41.4%
D.141.4%
首站也不例外,但首站的进站压力决定于气田的供气压力,当首站的进站压力随着气田供气压力而下降时,为了保持出站压力仍为Pmax,也就是在最少能耗下最大限度地发挥输气管的输气能力,在首站前增建附加的压气站或提高首站的压力比(亦要增加功率和能耗)的办法是必要和合理的。First stop is not exceptional also, but the first pit stop of gas supply pressure is determined by gas field pressure, when the first pit stop pressure gas supply pressure decreases as the gas field, in order to maintain the outbound pressure is still the Pmax, which is under the minimum energy consumption maximize pipeline gas ability, in the first station to build additional pressure QiZhan or raise head pressure ratio (also to increase the power and energy consumption) it is necessary and reasonable way.
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