i*******n
发帖数: 114 | 1 原题好像是create a fuse that can burn in 25 minutes.
You take one fuse and light two ends of it. At the same time, you burn
another fuse from one end.
By the time the first fuse burns out, it is 20 minutes. So you have a fuse (
second fuse burns for 20 minutes and has 20 minutes left.) that can burn in
20 minutes.
Burn the second fuse(20min one) on two ends and burn a third fuse from one
end at the same time.
By the time the second fuse burns out, you have a 30 minute fuse(the third
one).
Now you lig... 阅读全帖 |
|
y*l
发帖数: 334 | 2 国内朋友让代发的，长期有效的。不知道怎么发附件。。。如果需要原件中的pdf，可
站内短。
Targeting Talents
1. Education: PhD or Master in following majors
a) Mechanical Engineering: especially with focus on internal combustion
engine or transmission field b) Electronic Engineering: especially with
experience in Powertrain controlling and calibration
c) Chemical Engineering, focusing on after-treatment of catalyst applied in
automotive d) Material Engineering, focusing on the weight reduction
programs of vehicles
2. Professional Experience... 阅读全帖 |
|
z****s
发帖数: 1418 | 3 http://www.amazon.com/gp/product/B001G2LLHC/ref=oh_details_o00_
"Dundas Jafine MFX88X Semi-Rigid Aluminum DuctThe semi-rigid aluminum duct
is ideal when all aluminum duct is required by code in some gas and electric
dryer applications. This duct is totally non combustible with a maximum
operating temperature of 435 °F.Dundas Jafine MFX88X Semi-Rigid Aluminum
Duct Features:; Various applications include dryer venting, air conditioning
, fresh air intakes, heating, and exhausting; This Class 0, ... 阅读全帖 |
|
m***h
发帖数: 23691 | 4 翻了一下手册，没说要换脏水啊
OWNER MAINTENANCE
Periodically:
• Check the area around the unit.
• Check and remove any blockage from the
combustion air inlet and ventilation openings.
• Check the temperature/pressure gauge
Monthly:
• Check vent piping.
• Check combustion air inlet piping.
• Check the pressure relief valve.
• Check the condensate drain system.
Every 6 months:
• Check boiler piping and gas supply piping for
corrosion or potential signs of leakage. |
|
i***e
发帖数: 9429 | 5 借这贴我还要爆个暖气修理贴，这个是二月末的 Furnace求助贴，前后经历了大半年，
N 次的emails 来回，投入的时间大家可以想像。而那位同学最后拒绝把检测过程贴回
班上。违背了当时的承诺。当时这位同学还特别说到 ”我想还是贴出来大家可以参考
一下比较有意义“。 但是最后的回复让我无语。你花的时间和精力是应该的，而你根
本没有感受到我投入的时间和精力。你说你花了很多钱，你花了多少钱? 这钱又不是给
我的。 在开始前我事先有提醒过你，问题只有一个，一要有耐心，二可能会花点小钱。
现在帮你彻底问题检查出来，你居然这样对我说。如果要知道你不会贴回班上，我是肯
定不会帮你的。我要的是大家一起受益。
在四月底我的一个情绪反映，现在回想起，其实是成立的。你很有可能已经知道了问题
，所以采取不理，以为这样就可过去，想不到的是我对这玩意的极大兴趣让我不卸地坚
持下去。
当时还没有空调俱乐部， 是通过email. 里边因该不是全部，有时候我不是紧接着上下
回的。还有大量的图片。以后我将会整理出来，作为技术贴。大家看是要按日期由下朝
上看。
那位同学，你太自私了！
寄信人: ---
标 题: Re... 阅读全帖 |
|
i***e
发帖数: 9429 | 6 看了楼主的几个回复，说点我的看法，未考虑到的地方请几位大胆补充。
我认为需要请师傅再回来，另请也可，给furnace 做一个深度的清洗，用co2 pressue
clean heat exchanger 和排废气管道。然后做数据测试和燃烧系统的调整，这时就可
很容易的看出到底是heat exchange 出问题还是排气管道有堵，还是inducer 马达效率
减低（如果是80%以上的furnace).要注意的是师傅必须要用对仪器，要使用的是
combustion analyzer， 如 Bacharach 24 系列，Testo 327, 310，320等。
而不是combustible Gas Detector， 如 TIF 8800, 8900 系列等
下面视频是以Testo 320 为例，对一台32年的furnace 做的测试和调整。
一开始师傅先校正好天然气压力，从7分30秒开始就是具体的测试和调整。
一般情况下在furnace 周围（运行中）测得CO值低于20PPM都属正常，较老的furnace
如低于30PPM也可
接受。
楼主如测到如此高的CO值，肯定是找得出原因的，关键是... 阅读全帖 |
|
i***e
发帖数: 9429 | 7 看了楼主的几个回复，说点我的看法，未考虑到的地方请几位大胆补充。
我认为需要请师傅再回来，另请也可，给furnace 做一个深度的清洗，用co2 pressue
clean heat exchanger 和排废气管道。然后做数据测试和燃烧系统的调整，这时就可
很容易的看出到底是heat exchange 出问题还是排气管道有堵，还是inducer 马达效率
减低（如果是80%以上的furnace).要注意的是师傅必须要用对仪器，要使用的是
combustion analyzer， 如 Bacharach 24 系列，Testo 327, 310，320等。
而不是combustible Gas Detector， 如 TIF 8800, 8900 系列等
下面视频是以Testo 320 为例，对一台32年的furnace 做的测试和调整。
一开始师傅先校正好天然气压力，从7分30秒开始就是具体的测试和调整。
一般情况下在furnace 周围（运行中）测得CO值低于20PPM都属正常，较老的furnace
如低于30PPM也可
接受。
楼主如测到如此高的CO值，肯定是找得出原因的，关键是... 阅读全帖 |
|
l******i
发帖数: 2284 | 8 信号灯闪三次，pressure switch contact open.
但是取下燃烧室的盖子，furnace可以正常启动。。这是不是说明是combustion blower
的问题？ 另外combustion motor还是在动的。。是不是里面的叶片坏了？ |
|
l******i
发帖数: 2284 | 9 combustion blower 是不是blow air进到combustion chamber的？ |
|
c***i
发帖数: 278 | 10 刚买了43年旧的房子，目前有个还能工作的21年旧的gas furnace，地处中北部寒冷地
区，担心今年寒冬旧的furnace突然罢工，打算换一个，房子2层共2600sf。
目前就找了costco的，给了high和low efficiency 的两个方案,麻烦imore大神看看那
个比较合理，还有那些参数需要考虑的，有没有降价空间，谢谢。
第一个是SL280V 80% two stage最小的机子36A，报价是3900，除去costco15%折扣后价
格是3315
第二个是EL296V 96% two stage最小的机子36B，报价是4800，除去costco15%折扣后价
格是4080
(1)Lennox SL280UH070V36A 80% AFUE Gas Furnace
Limited Lifetime Heat Exchanger, 10 Year Parts, 1 Year Labor Warranty
Bid Includes: Removal/Disposal of Existing Furnace;
Connection to Existing Gas Piping... 阅读全帖 |
|
w******h
发帖数: 3 | 11 前面有网友在看完“潘伟平——长期迫害中国大陆学者、官司缠身、学术造假，营
造‘血汗实验室’，这样的人也配入选中组部千人计划？”一文后说，“就事论事，这
是在指责潘伟平在‘德’方面的问题，好像‘才’方面没提到。那么国家‘千人计划’
在德方面有哪些要求？好像没有嘛。”这位网友，谢谢你的回帖。下面我们提到潘伟平
“才”的一面。首先让我们回顾一下“千人计划”的基本要求。
“千人计划”是中国目前最高层次的海外人才引进计划。国家从2008年起，用五到
十年，引进一批战略科学家和领军人物回国创新创业。国家重视程度之高，投入力度之
大，远远超过“长江学者计划”。
“千人计划”设立四个平台，其中为高等学校和科研机构引进的海外高层次人才，
除基本要求外（年龄、学历、职称等），还需具备下列条件：
具有世界一流的研究水平，近五年在重要核心期刊上发表具有重要影响的学术论文；
获得国际重要科技奖项，掌握重要实验技能或科学工程建设关键技术。
潘伟平宣称的文章很多，让我们一一梳理，看他是否符合“千人计划”的条件。所
有资料均来自潘伟平美国西肯塔基大学燃烧科学与环境技术研究所的网站。
教育背景与工作单位简介：
潘伟平，... 阅读全帖 |
|
s*****n
发帖数: 7 | 12 以后让全国都做生物 纳米算了，别的专业都取消。
JFM是流体力学顶尖期刊， Proceedings of the Combustion Institute和Combustion
and Flame是燃烧两个著名TOP级期刊。
CNS |
|
y*l
发帖数: 334 | 13 国内朋友让代发的，长期有效的。如果需要原件pdf，可站内短。
Targeting Talents
1. Education: PhD or Master in following majors
a) Mechanical Engineering: especially with focus on internal combustion
engine or transmission field b) Electronic Engineering: especially with
experience in Powertrain controlling and calibration
c) Chemical Engineering, focusing on after-treatment of catalyst applied in
automotive d) Material Engineering, focusing on the weight reduction
programs of vehicles
2. Professional Experience: with researc... 阅读全帖 |
|
y*l
发帖数: 334 | 14 国内朋友让代发的，长期有效的。如果需要原件pdf，可站内短。
Targeting Talents
1. Education: PhD or Master in following majors
a) Mechanical Engineering: especially with focus on internal combustion
engine or transmission field
b) Electronic Engineering: especially with
experience in Powertrain controlling and calibration
c) Chemical Engineering, focusing on after-treatment of catalyst applied in
automotive
d) Material Engineering, focusing on the weight reduction
programs of vehicles
2. Professional Experience: with researc... 阅读全帖 |
|
h*****8
发帖数: 4754 | 15 【 以下文字转载自 Chinook 俱乐部 】
发信人: hill168 (认真学习中。), 信区: Chinook
标 题: Coal accounts for 10% of 8,100 MW added so far in 2012
发信站: BBS 未名空间站 (Thu Aug 23 08:40:52 2012, 美东)
Coal accounts for 10% of 8,100 MW added so far in 2012
ClimateWire, 8-21-12
By Daniel Cusick
Natural gas and renewable energy resources have effectively replaced coal as
the fuels of choice for electric utilities building new generation,
according to new data from the Energy Information Administration.
That finding, issued in a "Tod... 阅读全帖 |
|
c********g
发帖数: 1264 | 16 各位CAST-UT会员，朋友：
CAST-UT欢迎大家，特别是青少年, 参加科协举办的又一次长知识，开眼界的教育活动
－ 参观世界著名的工业级别燃烧和气化实验室。
适合人群： 欢迎所有爱科学，有兴趣的朋友和家庭参加。根据情况，参观过程中的讲
解会侧重学龄青少年。
参观时间：4月23日，星期四，下午4:30-5:30
集合地点：870 South, 500 West, Salt Lake City, Utah
停车须知：那里有一个可以容纳大约10辆车的停车场，不够的话，可以停在500 West
街道西侧（如果超过二十辆车的话，建议拼车）
参观当天具体安排：集合完毕后，先参观燃烧实验室，然后参观气化实验室。
报名：为保证活动质量，本次参观人数限制50人。报名请使用此链接：https://docs.
google.com/forms/d/1qk0pa86n0OiTXbhgwtBPAacSRuTH2H4w8YG051QxL8Y/viewform?usp
=send_form
讲解及领队：占中华博士
占中华：犹他科协理事； 2008年和2011年于华中科技大学分别取得工学学士和工... 阅读全帖 |
|
c********g
发帖数: 1264 | 17 各位CAST-UT会员，朋友：
CAST-UT欢迎大家，特别是青少年, 参加科协举办的又一次长知识，开眼界的教育活动
－ 参观世界著名的工业级别燃烧和气化实验室。
适合人群： 欢迎所有爱科学，有兴趣的朋友和家庭参加。根据情况，参观过程中的讲
解会侧重学龄青少年。
参观时间：4月23日，星期四，下午4:30-5:30
集合地点：870 South, 500 West, Salt Lake City, Utah
停车须知：那里有一个可以容纳大约10辆车的停车场，不够的话，可以停在500 West
街道西侧（如果超过二十辆车的话，建议拼车）
参观当天具体安排：集合完毕后，先参观燃烧实验室，然后参观气化实验室。
报名：为保证活动质量，本次参观人数限制50人。报名请使用此链接：https://docs.
google.com/forms/d/1qk0pa86n0OiTXbhgwtBPAacSRuTH2H4w8YG051QxL8Y/viewform?usp
=send_form
讲解及领队：占中华博士
占中华：犹他科协理事； 2008年和2011年于华中科技大学分别取得工学学士和工... 阅读全帖 |
|
c********g
发帖数: 1264 | 18 各位CAST-UT会员，朋友：
CAST-UT欢迎大家，特别是青少年, 参加科协举办的又一次长知识，开眼界的教育活动
－ 参观世界著名的工业级别燃烧和气化实验室。
适合人群： 欢迎所有爱科学，有兴趣的朋友和家庭参加。根据情况，参观过程中的讲
解会侧重学龄青少年。
参观时间：4月23日，星期四，下午4:30-5:30
集合地点：870 South, 500 West, Salt Lake City, Utah
停车须知：那里有一个可以容纳大约10辆车的停车场，不够的话，可以停在500 West
街道西侧（如果超过二十辆车的话，建议拼车）
参观当天具体安排：集合完毕后，先参观燃烧实验室，然后参观气化实验室。
报名：为保证活动质量，本次参观人数限制50人。报名请使用此链接：https://docs.
google.com/forms/d/1qk0pa86n0OiTXbhgwtBPAacSRuTH2H4w8YG051QxL8Y/viewform?usp
=send_form
讲解及领队：占中华博士
占中华：犹他科协理事； 2008年和2011年于华中科技大学分别取得工学学士和工... 阅读全帖 |
|
c********g
发帖数: 1264 | 19 已经报名的犹他科协会员和朋友请关注活动细则：
参观时间：4月23日，星期四，下午4:30-5:30
集合地点：870 South, 500 West, Salt Lake City, Utah
停车须知：那里有一个可以容纳大约10辆车的停车场，不够的话，可以停在500 West
街道西侧。根据目前报名人数，建议拼车前往。
参观当天具体安排：由于报名人数比较多，参观时将分成两组，分别由占中华博士和王
鼎博士带队。参观讲解以中文为主。视听众需要和程度，辅以英文。
注意事项：由于是工业级别燃烧气化实验室，实验室内可能存在正在运行的高温高压设
备，因此，请大家遵守以下注意事项：1）只在预定区域内走动；2）不要用身体任何部
位接触设备；3）请佩戴好预先准备好的防护眼镜，离开前请归还。4）请家长或成年人
看护好随行儿童。5）16岁以下儿童必须有家长或成年人陪同。
讲解及领队：占中华博士
占中华：犹他科协理事； 2008年和2011年于华中科技大学分别取得工学学士和工学硕
士学位。2011年5月被犹他大学化工系录取攻读博士学位，并于今年三月完成博士论文
答辩。占中华主要从事富氧燃烧过... 阅读全帖 |
|
m********g
发帖数: 2323 | 20 Yue Yang, Assistant Professor, Peking University
Previously co-sponsored by Dr. Jacqueline H. Chen, Sandia National
Laboratories and Professor Stephen B. Pope, Cornell University
Dr. Yang worked with with Professor Pope of Cornell University and Dr. Chen
of Sandia National Laboratories on advanced simulations of turbulent
combustion. The goal of his research was to assess and to improve the
capabilities of LES/FDF by making detailed comparisons with DNS of the same
flames and developing advanced... 阅读全帖 |
|
m********g
发帖数: 2323 | 21 Yue Yang, Assistant Professor, Peking University
Previously co-sponsored by Dr. Jacqueline H. Chen, Sandia National
Laboratories and Professor Stephen B. Pope, Cornell University
Dr. Yang worked with with Professor Pope of Cornell University and Dr. Chen
of Sandia National Laboratories on advanced simulations of turbulent
combustion. The goal of his research was to assess and to improve the
capabilities of LES/FDF by making detailed comparisons with DNS of the same
flames and developing advanced... 阅读全帖 |
|
H********g
发帖数: 43926 | 22 所以按wikipedia的说法，本生灯不开氧气门的时候会产生很小的碳粒，它的热辐射（
白炽发光）产生黄光。
氧气打开之后，产生的碳粒非常少，剧烈的氧化反应产生大量被激发的自由基（主要是
CH），发射蓝光。
http://en.wikipedia.org/wiki/Flame#Flame_color
In a laboratory under normal gravity conditions and with a closed oxygen
valve, a Bunsen burner burns with yellow flame (also called a safety flame)
at around 1,000 °C (1,800 °F). This is due to incandescence of very fine
soot particles that are produced in the flame. With increasing oxygen supply
, less black body-radiating soot is produced due to... 阅读全帖 |
|
o*****s
发帖数: 1445 | 23 In June 2006, Tesla Motors reported the Roadster's battery-to-wheel
efficiency as 110 W·h/km (17.7 kW·h/100 mi) on an unspecified driving
cycle—either a constant 60 mph (97 km/h)) or SAE J1634 test—and stated a
charging efficiency of 86% for an overall plug-to-wheel efficiency of 128 W
·h/km (20.5 kW·h/100 mi).[37][122][123]
Evolution of the Roadster's plug-to-wheel efficiency (smaller values
indicate better efficiency)In March 2007, Tesla Motors reported the Roadster
's efficiency on the EPA hi... 阅读全帖 |
|
P*******5
发帖数: 248 | 24 Job Opening available at a Fortune 500 company
Job summary:
Applies sound knowledge of engineering principles and practices in one of
the following areas:
combustion/performance/emissions, cool/lube/fuel systems, air handling,
system integration, aftertreatment integration, cycle simulation, vehicle
system simulation, combustion system simulation, flow simulation, filtration
, or after treatment simulation.
Having research experience in catalysis will be a plus.
Email me your resume to:
s****6@g... 阅读全帖 |
|
d**********p
发帖数: 126 | 25 ☆─────────────────────────────────────☆
ywahgliypa (Bless==Combustible) 于 (Wed Jun 27 13:35:13 2007) 提到:
非常不错，估计每个在海外的朋友都有这样的问题，空巢老人
☆─────────────────────────────────────☆
xlzhxl (小不点儿) 于 (Wed Jun 27 13:56:50 2007) 提到:
家里有兄弟姐妹的应该不会有‘空巢老人’的问题。
☆─────────────────────────────────────☆
ywahgliypa (Bless==Combustible) 于 (Thu Jun 28 13:34:28 2007) 提到:
搞定你的手机了没？
家里有兄弟姐妹的应该不会有‘空巢老人’的问题。
☆─────────────────────────────────────☆
hanel (hanel) 于 (Fri Jun 29 13:24:16 2007) 提到:
呵呵，有统计分析吗 |
|
S*****n
发帖数: 6055 | 26 Rank Abbreviated Journal Title
(linked to journal information) ISSN Total Cites Impact
Factor Immediacy
Index Articles Cited
Half-life
1 PROG ENERG COMBUST 0360-1285 1983 5.269 1.250 16 9.6
2 J CATAL 0021-9517 27254 4.737 0.800 330 8.4
3 APPL CATAL B-ENVIRON 0926-3373 10376 4.651 0.666 356 4.9
4 DYES PIGMENTS 0143-7208 3024 2.796 0.501 349 4.6
5 CATAL TODAY 0920-5861 15484 2.764 0.490 502 6.3
6 P COMBUST INST 1540-7489 4714 2.647 0.593 383 7.8
7 J MEMBRANE SCI 0376-7388 15786 2.432 0.346 |
|
S*****n
发帖数: 6055 | 27 Rank Abbreviated Journal Title
(linked to journal information) ISSN Total Cites Impact
Factor Immediacy
Index Articles Cited
Half-life
1 PROG ENERG COMBUST 0360-1285 1983 5.269 1.250 16 9.6
2 RENEW SUST ENERG REV 1364-0321 837 3.774 0.723 119 3.9
3 FUEL CELLS 1615-6846 814 3.273 0.220 50 3.5
4 BIORESOURCE TECHNOL 0960-8524 8565 3.103 0.563 508 5.5
5 J POWER SOURCES 0378-7753 20637 2.809 0.402 1255 4.2
6 INT J HYDROGEN ENERG 0360-3199 5545 2.725 0.144 616 5.4
7 P COMBUST INST 1540-7489 471 |
|
s*******g
发帖数: 52 | 28 Combustion Synthesis and Sintering of β-Sialon Ceramics (z = 2)
Journal of the Society of Materials Science, Japan
Vol. 57 (2008) , No. 12 pp.1248-1252
J. Zeng, Y. Miyamoto and O. Yamada,
“Combustion synthesis of sialon powders (Si6-zAlzOzN8-z, Z = 0.3, 0.6)”,
Journal of the American Ceramic Society,
Vol.73, Issue 12, pp.3700-3702 (1990).
非常感谢 |
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S*****n
发帖数: 6055 | 29 if hydrogen can drive cars, nuclear and/or solar energy can also drive cars
you have to give up internal combustion engine anyway. it makes no big
difference whether you switch to hydrogen power or to nuclear power
or, the other solution would be, if car guys are too lazy to give up
internal combustion engine, then biogasoline/biodiesel may have a chance. of
coz, biodiesel from triglycerides has no future. the biogasoline/biodiesel
has to be from CH2O.
As I said, biomass (CH2O) could be the midt... 阅读全帖 |
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S*****n
发帖数: 6055 | 30 if hydrogen can drive cars, nuclear and/or solar energy can also drive cars
you have to give up internal combustion engine anyway. it makes no big
difference whether you switch to hydrogen power or to nuclear power
or, the other solution would be, if car guys are too lazy to give up
internal combustion engine, then biogasoline/biodiesel may have a chance. of
coz, biodiesel from triglycerides has no future. the biogasoline/biodiesel
has to be from CH2O.
As I said, biomass (CH2O) could be the midt... 阅读全帖 |
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A***N
发帖数: 219 | 31 Regarding combustion research, especially of experiments, there are few
openings, majorly in automotive/aerospace industry. Besides, big companies,
such as GE global research, will occasionally have openings.
Regarding the skill sets of MODELING (CFD, C++, FORTRAN, etc.), knowledge of
chemical reaction (thermodynamics, kinetics, phase transformation/
separation, mass transfer, combustion,etc.), there will be much more
simulation opportunities in oil&gas industry, chemical industry,
pharmaceutica... 阅读全帖 |
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b****e
发帖数: 189 | 32 Coke deposited on FCC catalyst is burned off during the regeneration process
. My question is during the industry process, is it realistic to convert all
the coked carbon to CO2 (complete combustion)? If it is partial combustion,
what is the ratio of the CO/CO2 formation (to what extent carbon is
converted to CO and CO2, respectively), roughly speaking? Many thanks! |
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s*******g
发帖数: 52 | 33 Combustion Synthesis and Sintering of β-Sialon Ceramics (z = 2)
Journal of the Society of Materials Science, Japan
Vol. 57 (2008) , No. 12 pp.1248-1252
J. Zeng, Y. Miyamoto and O. Yamada,
“Combustion synthesis of sialon powders (Si6-zAlzOzN8-z, Z = 0.3, 0.6)”,
Journal of the American Ceramic Society,
Vol.73, Issue 12, pp.3700-3702 (1990).
非常感谢 |
|
x****h
发帖数: 300 | 34 1. Azuhata, S., Akimoto, H., Hishinuma, Y., 1982. Effect of H2O2 on
homogeneous
gas phase NO reduction reaction with NH3. AIChE Journal 28, 7-11
2. Salimian,S., Hanson, R.K., 1980 Kinetic study of NO removal from
combustion
gases by NHi-containing compound. Combustion Science and Technology 23, 225-
230 |
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z*h
发帖数: 773 | 35 Can we generate and vote the most important chemical reactions in humankind
and modern society?
The first two are:
(1) photosynthesis: CO2 + H20 + hv --> CH2O (carbohydrate) + O2
(2) respiration: CH2O + O2 --> CO2 + H2O + (ATP)
Burning
(3) Coal Combustion: C + O2 --> CO2
(4) Hydrocarbon combustion: CnHm + O2 --> CO2 + H2O
For chemical industries
C + 2H2O --> CO2 + 2H2 or (using methane)
N2 + 3 H2 --> 2 NH3
Making sulfuric acid
Making Cl2 by electrolysis
Oil cracking and reforming |
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s*******g
发帖数: 52 | 36 1. combustion synthesis of silicon nitride using ultrafine silicon powders
V. V. Zakorzhevskii and I. P. Borovinskaya
Journal of Powder Metallurgy and Metal Ceramics
Volume 48, Numbers 7-8 (2009), 375-380, DOI: 10.1007/s11106-009-9155-2
http://www.springerlink.com/content/245t721t6k70g358/
2.combustion synthesis of doped thermoelectric oxides
Jiri Selig, Sidney Lin, Hua-Tay Lin, D. Ray Johnson
Journal of the Australian Ceramic Society 48[2]， 2012， 194-197
3. Investigation of Si3N4/SiC SHS reacti... 阅读全帖 |
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x****h
发帖数: 300 | 37 Armitage, J.W.; Cullis, C.F. Studies of the reaction between nitrogen
dioxide
and sulfur dioxide, Combust. Flame 1971, 16, 125-130
Wendt, J.O.L.; Sternling, C.V. Catalysis of SO2 oxidation by nitrogen oxides
,
Combust. Flame 1973, 21, 387-390
x******[email protected]
Thanks a lot |
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m********e
发帖数: 5088 | 38 I was doing exactly the same thing as you in GE. First, it will be a lot of
money and effort to design experiments for benchmarking the simulation mode.
Second, even though you benchmarking your model by all kinds of efforts,
the model is questionable.
Let me give you an example. We developed a CFD/FEA coupling model with GRC
for a combustion component. We massaged the model well by using all kinds of
six sigma stuff to make sure it matches all the benchmark testing results.
However, when the re... 阅读全帖 |
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m********e
发帖数: 5088 | 39 I was doing exactly the same thing as you in GE. First, it will be a lot of
money and effort to design experiments for benchmarking the simulation mode.
Second, even though you benchmarking your model by all kinds of efforts,
the model is questionable.
Let me give you an example. We developed a CFD/FEA coupling model with GRC
for a combustion component. We massaged the model well by using all kinds of
six sigma stuff to make sure it matches all the benchmark testing results.
However, when the re... 阅读全帖 |
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m*********k
发帖数: 10521 | 40 "[Immigration]
sunair Oct 3. ● 错过IO的电话，发33包子求BLESS副申请人快绿或明天给打
电话！"
成功奖励 10 伪币的用户: chouwacuipin, luckyg, yrx417, mihoutaoboy,
deerpark323, ufokkk, pcu, wang229, nimble, acsca, noueop, gemmation, leewx,
slcut123456, huayuan, maoqi, sammix, alsa, ipman, oozoo, xiaoguai1, liugx212
, smalljeep, umbreon, kalpis, greedybear, camelina, stariter, furret,
lailai22, alyssum, kingler, pepper08088
"[Immigration]
sunair Oct 3. ● 和 GunS ，也发包子求485祝福"
成功奖励 10 伪币的用户: deerpark323, yifengcool, kkndwb,... 阅读全帖 |
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n***o
发帖数: 210 | 41 It's not about the benefit of "engine", it's about getting more O2 into the
cylinder for every single combustion: the lower the temperature, the more
the gas molecules per unit volume. Maybe increase the efficiency of the
combustion, since it's more likely the optimal fuel/air ration can be
reached. |
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y*******n
发帖数: 10103 | 42 感觉这个wall-guided系统,一来喷出来的汽油离spark比较远不容易实现精确的稀然？
二来喷出来的
汽油直接跟combustion chamber wall接触，会有液体的汽油付着在combustion
chamber
wall上，maybe一点点？ |
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s*********r
发帖数: 609 | 43 well, that is quite some google job just to win an argument...
the reason that mazda u.s. prohibits the use of synthetic oil with rx8 is
that rotary engine is designed in the way that some amount of engine oil
will be injected into engine's combustion chamber to lube the seal. dino oil
will burn off from the combustion so this is a feature by design. however,
with synthetic oil it is a different story. before we go into that, let's
make it clear when i say synthetic, i mean "synthetic oil in u.s |
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y*******n
发帖数: 10103 | 44 高转讲究的东西很多啊，
首当其冲的是Volumetric Efficiency(进气效率)，看cylinder head的设计了，当然也
还有air plenum的设计。
用更垂直的进气道，更大的气门面积更aggressive的凸轮（对低转扭矩是不利的影响）。
然后就是combustion efficiency，看combustion chamber的设计是不是利于Flame
propagation speed啊，在高转下这个有助于降低ignition advance timing，提高效率
。还有thermal efficiency也得考虑，搞些涂层降低热量的传导，不用cast iron 的
cylinder liner，直接在铝缸体上搞涂层，因为iron的热传导率比铝高。
最后就是轻量化。valve，con-rod，crankshaft bearings跟crankshaft的强度在高转
下是考验，都越轻越好，cast的不行上forge，forge的不行上钛。 |
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T**********e
发帖数: 387 | 45 detune的2.9L bi-turbo
Combustion Engine: 330 hp
Electric Motor: 136 hp
Total Output: 462 hp
Combustion Engine: 331 lb.-ft.
Electric Motor: 295 lb.-ft.
Total Output: 516 lb.-ft.
0-60mph 4.4s
和4s相比，车子重了好几百磅，加速弱了一些 （4s 0-60mph 4.0s)。起步价几乎一样
，但是e-hybrid标配sport chrono pkg，所以比同样配置的4s稍微便宜些。加上7500$的
federal tax credit，最后应该能便宜1w刀这样。虽然性能差一点点（讲真，日常用完
全没区别），但是考虑到纯电里程大约16mi，公司有充电桩，每年不仅油钱能省1，
2000，关键每天不用找车位了。加上全新的内饰和中控，很心动啊。 |
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t**t
发帖数: 27760 | 46 The most common use of platinum is as a catalyst in chemical reactions. It h
as been employed in this application since the early 1800s, when platinum po
wder was used to catalyze the ignition of hydrogen. The most important appli
cation of platinum is in automobiles as a catalytic converter, which allows
the complete combustion of low concentrations of unburned hydrocarbon from t
he exhaust into carbon dioxide and water vapor. |
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c**i
发帖数: 6973 | 47 (1) Aries Poon, Loretta Chao and Yukari Iwatani Kane, Factory Blast Roils
Tech Supply Chain: China's Hon Hai Closes Product Polishing Workshops;
Preliminary Report Blames Combustible Dust. Wall Street Journal, May 24,
2011.
http://online.wsj.com/article/SB10001424052702304
066504576340742638224326.html
Note: Go straight to the graphic, which caption includes
mote (n): "a small particle: SPECK"
www.m-w.com
(2) Kathrin Hille, Truckloads of Notebooks Mark First Step of Long March
INland; Rising cos... 阅读全帖 |
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c*********3
发帖数: 6862 | 48
don't be silly, you think those equipment used in China is the same as the
ones used in US or Japan? electric warming blanket is not supposed to reach
super high temperature as well, but how many Chinese were killed due to
overheating or even self combustion of the defective blankets. |
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w*********r
发帖数: 42116 | 49 怎么都是多数?
用MD的软件很多, 但是主要的生产厂商都是购买正版软件.
比如AUTODESK, 基本价就是5,000 USD. 还可以选些其他的辅助功能, 比如3D,
COMBUSTION等等. 1万美金就够了. 大陆企业不缺这个钱了.
件多数都是盗版美帝的软件，这些软件对高端制造和重工业都有巨大的影响。这还只是
很小的一个点而已。 |
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