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全部话题 - 话题: turbines
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D*******a
发帖数: 3688
1
http://www.technologyreview.com/tr35/profile.aspx?trid=1319
Qixin Chen, 30
Improving demand forecasting for electric power to save fuel and reduce
emissions
Tsinghua University
PROBLEM: Many power plants connected to the grid operate well below their
full capacity, wasting fuel. If we have no means to store large amounts of
electricity or reliably predict power demand, however, maintaining idle
capacity is the only way to respond quickly to surges in demand. The problem
is particularly challengi... 阅读全帖
l**a
发帖数: 6415
2
来自主题: _Hope版 - 我转一个同行的文章
删掉一些了。
链接如下
plainenglishnuclear.blogspot.com
.......
1. I live on the West Coast. Am I in danger?
No. Absolutely not.
You won’t even notice except that everyone will keep talking about it for
ages, and it’ll take us even longer to get off coal and oil and natural gas
because people will be afraid of nuclear power again. Go outside, get some
sunshine (or rain, depending), be grateful for the fact that your city isn
’t completely destroyed in an earthquake or a tsunami, hug your loved ones... 阅读全帖
c********r
发帖数: 26
3
这下发大了
印度签下最大的设备订单: 向上海电气集团采购100亿美元,32000兆瓦发电设备。
土鳖的产业真是今非昔比了!产业升级是做出来的,不是叫出来的。
Reliance Power places $10-bn equipment order for 32,000 MW
Thursday - Oct 28, 2010, 07:11pm (GMT+5.5)
New Delhi (IANS) - In one of the largest such orders of its kind, Reliance
Power, a part the Anil Dhirubhai Ambani Group, Thursday said it has awarded
a $10-billion contract to a Chinese firm to provide power plants equipment
of 32,000 MW capacity.
China's Shanghai Electric Corp (SEC) has been contracted to provide bo... 阅读全帖
h***y
发帖数: 4936
4
http://e.nikkei.com/e/fr/tnks/Nni20110328D28NY579.htm
Plutonium Detected In Soil At Fukushima Nuclear Plant
TOKYO (Kyodo)--Plutonium has been detected in soil at five locations at the
crippled Fukushima Daiichi nuclear power plant, Tokyo Electric Power Co.
said Monday.
The operator of the nuclear complex said that the plutonium is believed to
have been discharged from nuclear fuel at the plant, which was damaged by
the devastating March 11 earthquake and tsunami.
While noting that the concentrat... 阅读全帖
c**i
发帖数: 6973
5
VOA Chinese, Aug 12, 2011
http://www.voanews.com/chinese/news
/20110812-China-Russia-ends-visit-127582938.html
Note: 马林剧院 Mariinsky Theatre
http://en.wikipedia.org/wiki/Mariinsky_Theatre
(section 1 Name)
--------------------------------Separately
(1) 中国首艘航母不叫瓦良格号. VOA Chinese, Aug 12, 2011
http://www.voanews.com/chinese/news
/20110812-Aircraft-carrier-naming-127586618.html
("8月10日,中国首艘航母进行出海航行试验。官方新华社在报道中只用了“航母平台”
加以称呼。中央电视台的报道说,根据海军惯例,军舰在正式服役以后才会有真正的命
名")
Quote:
(a) "正式服役" in humans and milita... 阅读全帖
c**i
发帖数: 6973
6
VOA Chinese, Aug 13, 2011.
http://www.voanews.com/chinese/news
/20110813-Ukraina-China-127651288.html
My comment:
(a) Chinese are dumb. Read this:
Ukrainian Experts Say Kyiv Correct In Selling Carrier To China. Radio Free
Europe, Aug 11, 2011
http://www.rferl.org/content/ukrainian_experts_
say_kiev_correct_in_selling_carrier_to_china/24293430.html
("Another Ukrainian military expert, retired Navy captain Myroslav Mamchak,
suggests Ukraine could have earned even more money with the ship if it had... 阅读全帖
y****t
发帖数: 10233
7
if you cant read and do your own research i will post it here for you.
but next time, i wont treat you like a baby anymore.
==========================================================
At the Altamont Pass Wind Resource Area, wind turbines provide clean,
renewable energy to thousands of homes in California’s Bay Area.
Unfortunately, these same turbines have killed an average of ____67_____
golden eagles per year since the wind farm was constructed in the 1980s.
The Los Angeles Times reports that a... 阅读全帖
y****t
发帖数: 10233
8
来自主题: Military版 - baby真的要喂奶,怎么办?
给吧...
发信人: yourtt (rainmaker), 信区: Military
标 题: Re: 北加的风车每年搞死70头老鹰. (转载)
发信站: BBS 未名空间站 (Sat Mar 10 23:15:30 2012, 美东)
if you cant read and do your own research i will post it here for you.
but next time, i wont treat you like a baby anymore.
==========================================================
At the Altamont Pass Wind Resource Area, wind turbines provide clean,
renewable energy to thousands of homes in California’s Bay Area.
Unfortunately, these same turbines have killed an average of ... 阅读全帖
k****l
发帖数: 154
9
来自主题: Military版 - GE事件
有几点看法,
1. 首先这个郑小青应该不是在GE飞机发动机部门, 大概率是在heavy duty gas /
steam turbine 部门,主要是电厂发电用的燃机。
下面的新闻有提到(power division, power turbine)
https://seekingalpha.com/news/3378134-ge-engineer-ties-china-stole-power-
plant-technology-fbi-alleges
GE engineer with ties to China stole power plant technology, FBI alleges
Aug. 2, 2018 6:50 PM ET|By: Carl Surran, SA News Editor
A General Electric (NYSE:GE) engineer linked to Chinese companies has been
arrested for allegedly stealing files related to confidential power ... 阅读全帖
l****z
发帖数: 29846
10
来自主题: USANews版 - What The Top U.S. Companies Pay In Taxes
Christopher Helman, 04.13.11, 07:10 PM EDT
For all the outcry over GE, a number of corporate titans are paying much
higher rates than the average citizen.
image
In Detail: What The Top 20 U.S. Companies Pay In Taxes
As many Americans finish up their personal tax returns over the next few
days, they'll marvel with horror at how much hard-earned cash gets siphoned
up by the government. At times like this, it's satisfying to have a
corporate bogeyman to hate--like General Electric, which has faced ... 阅读全帖
n***s
发帖数: 294
11
来自主题: Automobile版 - 电动车真的能取代传统内燃机吗?
How about micro gas turbine + Super capacitor or battery?
gas turbine带电动机发电,车用全电驱动。gas turbine的能量转换效率比内燃机高很
多,只有一个转动部件,不需要变速箱,体积可以小很多。
g********d
发帖数: 19244
12
☆─────────────────────────────────────☆
BRZ (*86) 于 (Thu Oct 31 13:56:53 2013, 美东) 提到:
比较纳闷。直喷是都接受了。为什么这两个提高mpg的宝物日本车厂不去搞?是不是搞
不好还是我孤陋寡闻了?
☆─────────────────────────────────────☆
xinruzhishui (水心) 于 (Thu Oct 31 13:59:41 2013, 美东) 提到:
turbo成本太高 车价就上去了
☆─────────────────────────────────────☆
yogafire (不能不逗么) 于 (Thu Oct 31 14:00:31 2013, 美东) 提到:
可靠性提不上去吧
☆─────────────────────────────────────☆
xinruzhishui (水心) 于 (Thu Oct 31 14:00:50 2013, 美东) 提到:
至于Diesel 全世界就欧洲那嘎子喜欢这口
☆───────... 阅读全帖
C*G
发帖数: 7495
13
【 以下文字转载自 Military 讨论区 】
发信人: chlchenimr (笑天), 信区: Military
标 题: 发财了——印度签下最大的设备订单: 向上海电气集团采购100亿美元
发信站: BBS 未名空间站 (Thu Oct 28 21:03:43 2010, 美东)
这下发大了
印度签下最大的设备订单: 向上海电气集团采购100亿美元,32000兆瓦发电设备。
土鳖的产业真是今非昔比了!产业升级是做出来的,不是叫出来的。
Reliance Power places $10-bn equipment order for 32,000 MW
Thursday - Oct 28, 2010, 07:11pm (GMT+5.5)
New Delhi (IANS) - In one of the largest such orders of its kind, Reliance
Power, a part the Anil Dhirubhai Ambani Group, Thursday said it has awarded
a $10-billion contract... 阅读全帖
a*****e
发帖数: 2503
14
核能在GE里面比重占得并不多,就几个百分点,几天工夫股票跌了10%了。相当于把核
能从GE中彻底抹去了。
何况所谓核能相关建设里面用得很多GE相应的发电站的配套,比如GAS Turbine之类的
,只要不是PV直流发电,其他的发电基本都要用那些东西。你统统改成火电站,一样要用GE生产的gas turbine, steam turbine之流的东西
p***i
发帖数: 2119
15
来自主题: Stock版 - Sinovel是個流氓公司,呵呵
http://www.nawindpower.com/e107_plugins/content/content.php?con
Ex-AMSC Engineer Sentenced To Jail For Industrial Espionage
in News Departments > New & Noteworthy
by Wiebke Herding on Monday 26 September 2011
A former American Superconductor (AMSC) employee who admitted to selling
wind turbine secrets to Sinovel was convicted on Sept. 23 for fraudulent
data handling and distribution of trade secrets. Dejan Karabasevic was
sentenced to 12 months in jail, two years of probation and fined 200,000
e... 阅读全帖
f*****0
发帖数: 489
16
来自主题: EE版 - 说说smart grid

energy
there are many problems with renewable energy but the one concerning
grid is that unlike conventional power sources, the generation of wind
power, for example, is over an area, not a point. So you will have to
build a "local grid" to hook up the wind turbines.
On top of that, turbine farms are typically build where few people live.
That means there is no existing transmission lines, or transmission
lines of enough capacity, to transmit out power generated from a turbine
farm.
economicall
m*********1
发帖数: 72
17
Turbine Steam Path Mechanical Design And Manufacture
is not bad, it can give you some general idea of turbine components.
steam turbine theory and practice, W.J. Kearton
另外,哪个学校有涡轮机方面的专业?是和热能还是流体有关。谢谢
k******g
发帖数: 15
18
A recruiter has been contacting me for this position. It's a Sr. Loads and
Dynamics Engineer position for Wind Energy company down in the Virginia Beach area
. The recruiter said the company is looking to fill this position right away
. If your background matches the job, you can contact him directly.
Good luck!
Ideally (people with experience in some of these topics would quickly adapt
to their
function and be really helpful from the beginning):

Experience in wind turbine dynamics and a... 阅读全帖
F*********e
发帖数: 2696
19
来自主题: _Auto_Fans版 - 燃气轮机带发电机的来了
后来又一google
原来toyota在七十年代就搞过了
‘A Toyota Century with a GT45 gas turbine and electric motor was shown as
the Century gas turbine hybrid concept vehicle at the 1975 Tokyo Motor Show’
http://en.wikipedia.org/wiki/Toyota_Century
85年又搞了一部Toyota GTV concept
gas turbine 连CVT
http://www.youtube.com/watch?v=YRfFg5UdBp8
在 pandamalone (0000~史前圣灵猫熊) 的大作中提到: 】
e**n
发帖数: 1326
20
明白1/2Iomega^2这部分,但不是很明白这个和那个"而两者的总横截面积一致"条件的联
系?
如果从能量角度看的话,我们讨论前面的问题不就简化为,两个30瓦电机驱动的小风扇
和一个60瓦电机驱动的大风扇谁压气效率高而且转动惯量小?这个其实用牛顿力学不好
分析吧,可能要用流体力学?那个60瓦的能量肯定要耗散掉一点了。这个是compressor
这块。
turbine这边其实也一样,总共若干动能的气流,分开吹两个小turbine的动能转化效率
高,还是吹一个大的turbine的动能转化效率高。(假设不考虑排气歧管长短的差别,
虽然前面碳大已经指出单涡轮管路会比较长。。。)
V***b
发帖数: 3419
21
来自主题: _Auto_Fans版 - M4要先于M3出来?
BMW这傻X居然不说技术细节。那我来猜测一下吧,
应该是排气压力不够的时候,或者lift throttle的时候,在fresh air turbine一侧有
阀门打开fresh air inlet 和outlet,形成fresh air循环推动turbine转动。当排气压
力上来的时候,关闭阀门,转而只靠排气推动,这时候turbine已经有初速度了,就没
有lag了。
另外Impulse charging说的是另外的一回事,是指small turbo + short air path这个
组合。
Pre-tension和Impulse charging是两个重要的技术要点。我就说嘛,BMW turbo技术天
下第一。

details)
z*h
发帖数: 773
22
Energy densities are available in Wikipedia. Read it and think of it. If you
want to check conversion efficiency, I have a list here.
Input Output Conversion efficiency
e m large electrical motors 90-97
m m overshot waterwheels 60-85
e m small electric motor 60-75
t m large steam turbines 40-45
c m large gas turbines 35-40
c m diesel engines 30-35
c m best large steam engines 20-25
c m internal combustion engines 1
d*b
发帖数: 21830
23
春晓早出气了,2005年的时候人还说宁波民用气工程滞后,导致春晓产能严重浪费。国
华燃气电厂00年前后就开始运作了,那时候春晓还没上岸,用液化石油气维持GE gas
turbine 低速运转了一年多。算是gas turbine的维护奇迹了。
日本人说的春晓,可能是指春晓的某个气田而不是土鳖说的春晓。
i***a
发帖数: 4718
24
http://www.nytimes.com/2010/10/10/us/politics/10outsource.html?hp
By DAVID W. CHEN
Published: October 9, 2010
With many Americans seized by anxiety about the country’s economic decline,
candidates from both political parties have suddenly found a new villain to
run against: China.
From the marquee battle between Senator Barbara Boxer and Carly Fiorina in
California to the House contests in rural New York, Democrats and
Republicans are blaming one another for allowing the export of jobs to its
e... 阅读全帖
b*****e
发帖数: 5476
u****n
发帖数: 7521
26
To Conquer Wind Power, China Writes the Rules
http://www.nytimes.com/2010/12/15/business/global/15chinawind.html?partner=rss&emc=rss
The New York Times reports on the challenges faced by foreign companies
trying to enter the Chinese wind turbine industry:
With their government-bestowed blessings, Chinese companies have
flourished and now control almost half of the $45 billion global market for
wind turbines. The biggest of those players are now taking aim at foreign
markets, particularly the... 阅读全帖
T*R
发帖数: 36302
27
来自主题: Military版 - 我有麻烦了
Filed under Energy
Exelon probing shutdown of Braidwood reactors
By Julie Wernau
Posted Aug. 16, 2010 at 12:39 p.m.
Exelon Corp. is investigating the cause of shutdowns this morning of two
nuclear reactors at Braidwood Generating Station.
The Unit 2 turbine tripped off line at 2:06 a.m., followed 13 minutes later
by a shutdown of the Unit 1 reactor.
Nuclear Regulatory Commission spokeswoman Prema Chandrathil said in the case
of Unit 2, there was a problem with the path of the electrical current,... 阅读全帖
f**k
发帖数: 15238
28
【 以下文字转载自 Military2 讨论区 】
发信人: Teller (yy), 信区: Military2
标 题: NHK NEWS(3/26):东电现在宣布被迫排水zz
发信站: BBS 未名空间站 (Sat Mar 26 10:29:42 2011, 美东)
策略一, 淡水代替海水冷却反应堆。
http://www3.nhk.or.jp/daily/english/26_08.html
TEPCO forced to change strategy at plant
东电被迫改变策略抢救核电站
Tokyo Electric Power Company has been forced to change its strategy at t
he quake-hit Fukushima Daiichi nuclear power plant due to high radiation
levels at the site.
由于目前福岛核电站内强辐射泄露,东电(TEPC)被迫改变其策略。
The plant's nuclear reactors 1 through 4 ha... 阅读全帖
h***y
发帖数: 4936
29
人员都撤了
http://in.reuters.com/article/2011/03/27/idINIndia-559062201103
(Reuters) - Workers were evacuated on Sunday from a reactor building they
were working in after high doses of radiation were detected at Japan's
stricken nuclear power plant in Fukushima, the plant's operator said.
Tokyo Electric Power Co, the plant's operator, said radiation 10 million
times the usual level was detected in water that had accumulated at the No.2
reactor's turbine housing unit.
An official at TEPCO said workers... 阅读全帖
c*****r
发帖数: 8227
30
来自主题: Military版 - NHK 3/27 13:44 新闻
要点在最后一段。“the suppression chamber of the Number 2 reactor, which is
known to be damaged.”
Extreme radiation detected at No.2 reactor
Tokyo Electric Power Company says it has detected radioactive materials 10-
million-times normal levels in water at the No.2 reactor complex of the
Fukushima Daiichi nuclear plant.
The plant operator, known as TEPCO, says it measured 2.9-billion becquerels
of radiation per one cubic centimeter of water from the basement of the
turbine building attached to the Number... 阅读全帖
h****i
发帖数: 302
31
http://www.smh.com.au/environment/japan-on-maximum-alert-over-n
Japan's Prime Minister Naoto Kan says his government is in a "state of
maximum alert" over the crisis at the stricken Fukushima nuclear plant.
Jiji Press reports that Kan has told a lower house budget committee meeting
that the situation "continues to be unpredictable" and that the government "
will tackle the problem while in a state of maximum alert", Jiji reported.
Mr Kan's comments came as the operator of the stricken plant said... 阅读全帖
c**i
发帖数: 6973
32
VOA Chinese, June 10, 2011.
http://www.voanews.com/chinese/news
/20110610-worldpress-coverage-china-123653074.html
Note:
(a) The opening remark
“中国海军逐渐走向深蓝,国人对中国航母的呼声越来越高,军迷对中国海军航母的期
待与日俱增,那么,中国航母计划如何,中国航母到底何时驰骋大洋?中国航母专题与
您一起...”
may have been in the 专题
http://www.huanqiu.com/zhuanti/mil/cv/
but is NOW removed.
(b) Kiev class aircraft carrier
http://en.wikipedia.org/wiki/Kiev_class_aircraft_carrier
(the first class of fixed-wing aircraft carriers built in the Soviet Union;
Unlike American or Bri... 阅读全帖
w**********2
发帖数: 764
33
Fort Calhoun Nuclear Plant: Flood Seeps Into Turbine Building At Nebraska
Nuke Station
OMAHA -- Missouri River floodwater seeped into the turbine building at a
nuclear power plant near Omaha on Monday, but plant officials said the
seepage was expected and posed no safety risk because the building contains
no nuclear material.
An 8-foot-tall, water-filled temporary berm protecting the plant collapsed
early Sunday. Vendor workers were at the plant Monday to determine whether
the 2,000 foot berm ca... 阅读全帖
f*********d
发帖数: 3358
34
来自主题: Military版 - bbking的产品在美国评价不错呀
http://news.cnet.com/8301-13645_3-10466722-47.html
Hifiman HM-801 vs. iPod, Zune: A sound winner?
Sure, iPods and Zunes can sound perfectly fine, but no one ever claimed they
were bona fide portable high-end audio devices. Their "good enough" sound
isn't entirely their fault: they're too small to house a battery potent
enough to power a high-quality headphone amplifier and a high-resolution 24-
bit/96kHz digital-to-analog converter.
The Hifiman High Fidelity Music Player HM-801 is the Hummer of ... 阅读全帖
T**********e
发帖数: 29576
35
来自主题: Military版 - 轮子之后的50项最伟大发明
The 50 Greatest Breakthroughs Since the Wheel
http://www.theatlantic.com/magazine/archive/2013/11/innovations
1. The printing press, 1430s
The printing press was nominated by 10 of our 12 panelists, five of whom
ranked it in their top three. Dyson described its invention as the turning
point at which “knowledge began freely replicating and quickly assumed a
life of its own.”
2. Electricity, late 19th century
And then there was light—and Nos. 4, 9, 16, 24, 28, 44, 45, and most of the
rest of mode... 阅读全帖
S***1
发帖数: 3140
36
一次航程1.5万公里,时速60公里,可以从印度洋开到大西洋再回到太平洋。排水量
7200吨,载有16枚射程达295公里的“布拉莫"超音速巡航导弹。
Indian warship building is coming of age and the Indo-Pacific region knows
it. Last week, when an Indian Navy frigate, INS Shivalik, visited China’s
Qingdao naval base, China’s navy chief, Admiral Wu Shengli, asked the
captain for a tour of the Combat Information Centre, the operation heart of
the warship. The Shivalik’s young skipper, Captain Puruvir Das, turned down
Wu’s request.
The Chinese admiral would be even more in... 阅读全帖
d*b
发帖数: 21830
37
先不说价格,小单元取暖用天燃气有严重的安全隐患,所以美国除了那些比较大的
complex外,家庭取暖基本不是煤油就是电,只有很少部分用天燃气。集中供暖用天燃
气并没有比用煤先进多少。而且天燃气用gas turbine,比烧煤的stream turbine复杂多
了。
而且中国的天燃气基本是海洋油气,集中在南方,因为这个原因我鳖在浙江沿海造了10
多个燃气电厂,把东海燃气改成电往北输送。
l*y
发帖数: 21010
38
来自主题: Military版 - Be safe
http://www.youtube.com/watch?v=s59rx_VBCY8
One of those fucking awful black days
When nothing is pleasing and everything that happens
Is an excuse for anger
An outlet for emotions stockpiled, an arsenal, an armour
These are the days when I hate the world
Hate the rich, hate the happy
Hate the complacent, the TV watchers
Beer drinkers, the satisfied ones
Because I know I can be all of those little hateful things
And then I hate myself for realizing that
There's no preventative, directive or safe ... 阅读全帖

发帖数: 1
39
来自主题: Military版 - 数据说话:长江水深
Hermes had an overall length of 600 feet (182.9 m), a beam of 70 feet 3
inches (21.4 m), and a draught of 23 feet 3 inches (7.1 m) at deep load. She
displaced 10,850 long tons (11,020 t) at standard load.[8] Each of the ship
's two sets of Parsons geared steam turbines drove one propeller shaft at a
speed of 25 knots (46 km/h; 29 mph).[5] Steam was supplied by six Yarrow
boilers[9] operating at a pressure of 235 psi (1,620 kPa; 17 kgf/cm2).[5]
The turbines were designed for a total of 40,000 sha... 阅读全帖

发帖数: 1
40
Hermes had an overall length of 600 feet (182.9 m), a beam of 70 feet 3
inches (21.4 m), and a draught of 23 feet 3 inches (7.1 m) at deep load. She
displaced 10,850 long tons (11,020 t) at standard load.[8] Each of the ship
's two sets of Parsons geared steam turbines drove one propeller shaft at a
speed of 25 knots (46 km/h; 29 mph).[5] Steam was supplied by six Yarrow
boilers[9] operating at a pressure of 235 psi (1,620 kPa; 17 kgf/cm2).[5]
The turbines were designed for a total of 40,000 sha... 阅读全帖
p*********e
发帖数: 32207
41
来自主题: Military2版 - 99坦克总师爆料了
我找到出处了,似乎是以前我放狗搜到的:
#1 The gas turbine is a fuel hog
The gas turbine engine provides unmatched acceleration, but consumes
a lot a fuel. Estimates vary, but the combat average (not highway cruise
average) from various sources is about three gallons per mile (not miles
per gallon). This is about three times more than similar diesel engines
.
我看了一下你的那个链接,里面说的0.6MPG没提到是什么行使状况下的
那跟上面那个0.33也不算冲突.
燃气轮机对燃料要求低什么都能烧确实是个非常好的优点,对于军用车辆来说.
p*********e
发帖数: 32207
42
还有点儿没弄明白
这个force forward指的是什么?向前的作用力?
你的意思是说燃烧室里混合汽燃烧膨胀之后,
向前的作用力有50%作用在高压压气机(燃烧室之前),30%作用在燃烧室的壁上
然后20%作用在喷嘴上?
那后面的50% on turbine是指全部作用力的一半是向后的,
全部作用在turbine上从而驱动compressor?
然后形成thrust的是chamber+nozzle的部分?
T****r
发帖数: 22092
43
策略一, 淡水代替海水冷却反应堆。
http://www3.nhk.or.jp/daily/english/26_08.html
TEPCO forced to change strategy at plant
东电被迫改变策略抢救核电站
Tokyo Electric Power Company has been forced to change its strategy at t
he quake-hit Fukushima Daiichi nuclear power plant due to high radiation
levels at the site.
由于目前福岛核电站内强辐射泄露,东电(TEPC)被迫改变其策略。
The plant's nuclear reactors 1 through 4 have all lost their cooling cap
abilities as both external and backup power supplies failed after the qu
ake and tsunami.
在地震和海啸的袭击下,导致福岛核电站... 阅读全帖
T****r
发帖数: 22092
44
http://www3.nhk.or.jp/daily/english/27_12.html
Extreme radiation detected at No.2 reactor
2号反应堆发现重度辐射外泄
HK NEWS--- 东电灌个毛水,很明显2号反应堆已经破裂了。
Tokyo Electric Power Company says it has detected radioactive materials
10-million-times normal levels in water at the No.2 reactor complex of t
he Fukushima Daiichi nuclear plant.
东京电力公司向外界表示,在福岛核电站2号反应堆机组的积水里发现含有超过正常
值1000万倍的辐射物质。
The plant operator, known as TEPCO, says it measured 2.9-billion becquer
els of radiation per one cubic centimeter of water from t... 阅读全帖
s*****w
发帖数: 262
45
你说的是涡扇发动机,涡轮喷气发动机没有风扇。风扇在这儿作用是提高进气的压强,
这样燃烧室的气体压强和温度才可以提上去,否则的话,如果没有风扇,过高的压强的
燃烧室气体就可以选择往前喷出。气体一直往后运动跟发动机的初始状态和结构很有关
系。一旦气体往后运动形成,要想改变气体流向需要大量的能量。但特殊情况下这是可
以发生的,比如喘振,一般发动机设计师要特别小心防止这个出现。再回到风扇,喷气
发动机的 风扇和汽车上的turbine原理是一样的。风扇在这里只是优化发动机效率。所
有风扇和turbine的 能量来自于燃料的燃烧。风扇当然也可以提供动力,比如说涵道比
很高的民航客机的涡扇发动机。

共轴,靠涡轮旋转来带动前段的压气机工作。而涡轮的动力来自于燃烧室的高温燃气的
冲击。我想不明白的是,燃烧室两头都是通的,前通压气机,后通涡轮机,也没有什么
进气口,出气口的活门之类
为什么不从前头出来? 一般解释是开始工作的时候速度很快了,前面空气压力大,后
面空气压力小,所以往后喷。但是问题是,能维持这个高速的唯一动力就是高温高压燃
气,是这个燃气的动力使得br />
时打开活门,喷气时关掉活门,气就... 阅读全帖
l****z
发帖数: 29846
46
来自主题: USANews版 - 裙带资本主义
裙带资本主义:根据人造全球暖化歇斯底里,奥巴马开始限制温室气体排放,但和白宫
关系密切的通用电气不受规章限制
http://washingtonexaminer.com/blogs/beltway-confidential/2011/0
Obama issues global warming rules in January, gives GE an exemption in
February

By: Timothy P. Carney 02/02/11 4:50 PM
Senior Political Columnist
Last month, the Obama EPA began enforcing new rules regulating the
greenhouse gas emissions from any new or expanded power plants.
This week, the EPA issued its first exemption, Environment & Energy News
reports:
The Obama admi... 阅读全帖
l****z
发帖数: 29846
47
来自主题: USANews版 - Wind power: Even worse than you thought
But your 'leccy bill will keep going up to buy more of it
By Lewis Page
Posted in Environment, 7th April 2011 09:36 GMT
A new analysis of wind energy supplied to the UK National Grid in recent
years has shown that wind farms produce significantly less electricity than
had been thought, and that they cause more problems for the Grid than had
been believed.
The report (28-page PDF/944 KB) was commissioned by conservation charity the
John Muir Trust and carried out by consulting engineer Stuart You... 阅读全帖
l****z
发帖数: 29846
48
来自主题: USANews版 - Vestas to cut 2,335 workers worldwide
Vestas to cut 2,335 workers worldwide; warns of 1,600 Colorado layoffs later
Danish wind turbine manufacturer Vestas Wind Systems announced it will cut 2
,335 employees around the world, most of them at a Danish manufacturing
plant, and said that 1,600 jobs at its Colorado factories could be
eliminated “later this year” if a federal production tax credit isn’t
extended beyond the end of 2012.
The 2,335 positions to be cut now include 182 in the U.S. Vestas officials
in Portland, Ore., where the ... 阅读全帖
l****z
发帖数: 29846
49
Despite the fact that Obama's own policies have wiped out countless jobs and
resulted in other jobs moving to foreign countries, the Obama campaign
today accused Mitt Romney of being the "Outsourcer-in-Chief." That was
deeply ironic, because the Obama Administration has spent billions of tax
dollars subsidizing the outsourcing of American jobs to foreign countries.
Obama, not Romney, is the Outsourcer-in-Chief.
“79 percent” of all green-jobs spending in Obama’s $800 billion stimulus
package went... 阅读全帖
d***p
发帖数: 937
50
相比2009年,美国制造业就业增加了152%, 比2005增加了38%
http://money.cnn.com/2012/09/10/smallbusiness/manufacturing-job
Manufacturing jobs boom is for real
By Parija Kavilanz@CNNMoneySeptember 10, 2012: 5:56 AM ET
Ohio, Michigan, Texas and California are among the states with greatest
demand for skilled factory workers. Click map for all states.
NEW YORK (CNNMoney) -- President Obama last week promised a boom in
manufacturing and 1 million new jobs if he is reelected.
But is the boom for real? For high-paying, skil... 阅读全帖
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