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更多“已知Car=49%，Mar=8%，Aar=30%，求该煤的可…”相关的问题
已知：Car=60%、Sar=2%、Har=1%、Mar=10%、Aar=20%、Nar=2%、Oar=5%，煤的低位发热量Qar,net,p=20935kJ/kg。
求：
已知锅炉每小时燃煤100t，该煤的成分为：Car=51.625%、Sar=1.0%、Har=3.0%、Mar=13%、Aar=20%、Nar=1.375%、Oar=10%，锅炉房温度为30℃，β=0.077，在完全燃烧情况下，若测得炉膛出口处RO2=14%，而排烟处(RO2)py=12.5%。求每小时漏入烟道的干空气量。
已知煤的分析数据如下：Car=56.83%，Har=4.08%，Oar=9.63%，Nar=0.73%，Sar=0.63%，Mar=8.98%，Aar=19.1%，Vdaf=34.28%，Qar,net,p=22154kJ/kg。求此种煤完全燃烧时理论空气量V0是多少？若某锅炉燃用此煤，每小时耗煤量B=100t，炉膛出口氧量O2=3.5%，所需的实际空气量Vk为多少(在标准状态下)？
某400t/h煤粉炉燃用煤的收到基成分为：Car=47.9%，Har=3.04%，Oar=5.15%，Nar=0.86%，Sar=0.45%，Aar=34.74%，Mar=7.86%，试计算煤的干燥无灰基元素成分及灰的干燥基含量。
甲煤Aar=32.46%，Mar=13.56%，Qnet,ar=18250kJ/kg，乙煤Aar=34%，Mar=5.6%，Qnet,ar=18990kJ/kg。以上两种煤，哪种煤的实际灰分含量较高，哪种煤对锅炉危害大？
某锅炉燃用京西无烟煤，其特性如下：Cdaf=94%、Hdaf=1.4%、Ndaf=0.6%、Odaf=3.7%、Sar=0.3%、Mar=4%、Aar=24%，燃料特性系数β=0.024，当过量空气系数α=1.1时，求实际空气量。
A．30、8
B．30、64
C．24、8
D．24、64
听力原文：M: Well, Mrs. Fern, how did you do in your driving test？
W: Not so well, I'm afraid.
M: Didn't you get your license？
W: No. My score was only 49 percent. The woman who tested me was very strict about everything.
M: Where did you lose the most points？
W: One thing was not turning my head before changing lanes or making turns.
M: Right. Using a turn signal isn't enough. To be safe, you have to glance back over your shoulder in the direction you want to go.
W: My teacher didn't emphasize that enough, or about maintaining the right distance behind the car in front.
M: That's right. You need a training distance of about one or two car lengths when you're driving.
W: My parallel parking was good. I've been practicing that a Iot.
M: What was your worst moment？
W: Waiting on an uphill stop for the light to change to green.
M: What happened？
W: Well, I let the car stall and forgot how to use the hand break. So the car rolled back and bumped the one behind me.
M: That alone probably failed you.
How did the woman do in the driving test？
A．She failed.
B．She barely passed.
C．She passed easily.
D．She wouldn't say.
听力原文：M: Well, Mrs. Fern, how did you do on your driving test？
W: Not so well, I'm afraid.
M: Didn't you get your license？
W: No. My score was only 49 percent. The woman who tested me was very strict about everything.
M: Where did you lose the most points？
W: One thing was not turning my head before changing lanes or making turns.
M: Right. Using a turn signal isn't enough. To be safe, you have to glance back over your shoulder in the direction you want to go.
W: My teacher didn't emphasize that enough, or about maintaining the right distance behind the car in front.
M: That's right. You need a training distance of about one or two car lengths for every 10 miles per hour you're going.
W: My parallel parking was good. I've been practising that a lot.
M: What was your worst moment？
W: Waiting on an uphill stop for the light to change to green.
M: What happened？
W: Well, I let the car stall and forgot how to use the hand break. So the car rolled back and bumped the one behind me.
M: That alone probably failed you. .
How did the woman do on her driving test？
A．She failed.
B．She barely passed.
C．She passed easily.
D．She wouldn't say.
