lojmikak
Dołączył: 30 Sie 2010
Posty: 1597
Przeczytał: 0 tematów
Ostrzeżeń: 0/5
Skąd: olvovw
|
 Wysłany: Wto 19:52, 14 Gru 2010 Temat postu: ugg stivali Instances from the Sichuan Province in |
 |
|
Instances from the cold cave in Sichuan Province need insulated
Shangqie will cross the insulation layer, the invasion of ground, forming ice layer. 5 tons of cold cave without making insulating layer, 0 ℃ isotherm will in the not too long period of time over of stone, plain concrete and other cave protective layer, invasion of the mountain, slowly formed around the cave in permafrost. The depth of permafrost, according to some literature is 2m, and some records are more than 3m. It depends on storage temperature may be, because the depth and temperature of permafrost directly Mountain system. It is said that the temperature on the mountain in Tibet in a 40 ℃ below the permafrost at a depth of 5m or so! Frozen soil is essentially frozen into ice water. Due to the icy water vapor partial pressure smaller. Not frozen water near the water vapor partial pressure greater Yan, water or water vapor will slowly move to the place of ice and attached to the ice, the ice crystals grow slowly. Combined with the library in which the geology is a layer of shale, a layer of sandstone, mudstone, the latter more benefits of water, so water can easily come away ice at the accumulation of which contributes to the momentum of growth of ice crystals. Water frozen into ice, its volume increased 9 ~ 1O%, will produce frost heave force. The power that be? Some literature is 116t /, and some records are calculated according to 870 /,. So powerful, enough to make ground from the cold of the floor heave, or even to lift the Civil Column! Certainly cold enough to make the cave walls and floor heave, the vault broken down (in fact a heave from) the . In 1990, the plant by the experts, concluded that: 5 tons of cold storage cave is a risk library. Basis of this conclusion can not continue to use the library. But there is no replacement library, therefore, had to use the instance of the four monitoring: a cave in Sichuan cold storage factory Fengjie region, and put into operation soon frozen heave scrapped. And down three similar reasons, do not repeat them. From the above we can see real guillotine, Sichuan cold cave the main reason for these problems, first,[link widoczny dla zalogowanych], the cave has not yet developed cold storage design specifications, work nothing to follow. Second is to recognize the error and lack of experience. That the construction of cold storage cave is as simple as playing a few holes, or the use of idle air-raid shelter. Cooling equipment can be installed on a production. After many years of practical experience has shown that: to build the cold storage cave. In addition to address and make the right choice library construction and thermal design juice outside. Must also be properly insulated. Insulated design principle is: it is necessary to exercise to stay cold cave thermal stability, thermal fluctuations from the outside world advantages, but also to reduce the consumption and consumption,} i7-,, 4.. Road disabilities Jubilee: and cooling. NO. 3,19887. Yu Jianhua: (cold storage cave drip>, Southwest Association for Communications Technology. NO.2, 1983. 8. Sue middle: C induced drainage method in the low-temperature cold storage applications), refrigeration technology, NO. 4,1982. 9 Wang Shu-yuan: 'Expansion and crisp soil freezing cold floor>, refrigeration technology. NO. 4,1981. 1O. Liu made: 'cold floor drum analysis>, meat industry, NO. 7,[link widoczny dla zalogowanych],1988. 11. Huang Haiming: 'Cold cracking a cold dark cave Analysis>, Association for Communications Technology,[link widoczny dla zalogowanych], NO. 1,1989 J. L hail made the state income countries; 'cryopreservation of sweet success of microscopic algae, the word recently, Department of Pharmacy, Osaka University Professor Tian Shouzheng flat so the tiny algae cell to package the manipulation of micro-capsules, after drying, using liquid nitrogen directly into the methods, successful completion of cryopreservation. The survival rate after thawing of up to 95%. And confirmed that the proliferation and frozen exactly as before. Previous methods need to add anti-freezing agents,[link widoczny dla zalogowanych], but these anti-freezing agents are toxic, but also must be equipped with temperature controlled cooling freezer. Yu-Rex tincture then newly developed technique is not only the survival rate, and available safe, simple device to save, this is one great advantage. In addition, the alleged hairy roots can be applied to seeds or plants,[link widoczny dla zalogowanych], and other helpful resources, cryopreservation, the prospects for this technology is extremely broad. Data compiled Zhang Zhaofu From: Japan (Nikkei Business New Lin) 98.51238 A
相关的主题文章：
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
Post został pochwalony 0 razy
|
|
