天睛 2007-8-28 10:34
汽车空调压缩机分类
（1）往复式压缩机：采用曲柄连杆机构的往复式压缩机是汽车空调早期采用的一种形式的压缩机，以美国GE公司生产的立式双缸压缩机为代表。
（2）斜板式压缩机：这类压缩机有斜盘式和摇板式两种结构形式。具有技术较为成熟、可靠性高等特点，从而得以广泛的应用。是目前汽车空调中使用的主流机型。以日本三电生产的斜盘系列压缩机为代表。
（3）滚动活塞式压缩机：体积小、效率高、重量轻，但扭矩波动较大，结构形式有半封闭和全封闭两种，该类压缩机以日本三菱公司为代表。
（4）三角转子式压缩机：该种机型结构简单，但精度要求高，日本80年代中期有过生产，我国90年代中期也有厂家生产过，市场使用不多。
（5）滑片式压缩机：该类压缩机的缸体结构有多种形式，主要的有圆缸、椭圆缸、曲面缸等。轴与缸体有同心安装和偏心安装两种，这种压缩机结构简单，零件少启动力矩小，平衡性能好，高速性能优越，以日本粗工精机、杰克赛尔、电装等为代表，该类机型是目前发展和使用增长较快的换代产品。
（6）涡旋式压缩机：该类机型结构紧凑，高效低振动，连续吸排气、可靠性高。是目前最具竞争力的一种机型，但对加工设备的要求较高，尚处于小批量阶段，这类机型的厂家以日本三菱、三电为代表。
fcsgame01 2008-6-6 15:45
China not to sacrifice food for fuel: energy experts
China not to sacrifice food for fuel: energy experts
Updated: 2008-06-06 07:05
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MANILA -- China has no plan to sacrifice food for fuel, the country's energy experts said on Thursday amid controversy over biofuel.
"Food security comes first in China, more important than fuel," said Song Yanqin, a co-drafter of China's national energy strategies, at Asia Clean Energy Forum 2008 sponsored by the Asian Development Bank (ADB) in Manila.
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"Biofuel," as said in the ADB's publication "Development Asia", has become a new buzz word all over the world, from the Philippines to Brazil, from the United States to the European Union.
Produced from agricultural crops such as maize, palm oil, sugarcane and jatropha, biofuel are used to run factories, power stations and vehicles. Countries that have the right conditions are setting aside millions of hectares of land for new plantations as international demand for prominent biofuel.
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However, there is another side of the coin. The development of biofuel is considered as one reason for the global shortage of grain which drives food prices high in many countries. In the Philippines' southern region of Mindanao, for instance, rice prices have gone up to 50 pesos ($1.14) per kilogram.
"Biofuel is sensitive," said Song, especially in China, where 1. 3 billion people live on only 120 million hectares of arable land.
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"Actually, in the global context, biofuel is still a controversial topic calling for serious study," said Zhou Dadi, an advisor to China's National Energy Leading Group.
At the same forum, Dan Millison, a US designer of higher-tech alcohol plants, said "food versus fuel is 99-percent noise."
"Do your homework and get a noise filter. Time magazine is not your key reference document," he addressed the audience via a video-conferencing system.
"This problem is complicated," said Eric Usher, an official of United Nations Environment Program, adding that the dispute over biofuel will not be solved in a short time.
At the forum, with the theme of "Investing in Solutions that address Climate Change and Energy Security," Zhou Dadi explicated the sustainable energy strategy of China, giving priority to " conservation."
"Conservation comes first in the sustainable energy strategy of China," said the adviser, adding that specific and detailed regulations for energy conservation have been made in the country.
China has also set a target of 20 percent-intensity decrease for the 2006-2010 national development plan. That is, the country has to realize 4.4-percent energy-efficiency improvement annually in the five years, Zhou said.
Compared with the global annual figure of 1.2 percent over the past 30 years, the target for China is really impressive and encouraging, the adviser added.
