Simple But Powerful Centrifugal Chillers

Written by Thomas Yoon

Centrifugal chillers are used for cooling large buildings in a centralized air conditioning system. There are other types of chillers using screw compressors and reciprocating compressors. These are usually smaller in size. Today's topic is about centrifugal chillers -repparttar ultimate choice for any air conditioning installations higher than 500 RT (refrigeration tons)

Basically, centrifugal chillers use centrifugal fans to move repparttar 133422 refrigerant withinrepparttar 133423 chiller circuit. As with any refrigeration circuit, there must be a compressor, a condenser, an expansion device, andrepparttar 133424 evaporator.

Inrepparttar 133425 case ofrepparttar 133426 centrifugal chiller,repparttar 133427 fan isrepparttar 133428 compressor. Rotating at very high speeds, it is capable of pressurizingrepparttar 133429 refrigerant gas so as to increase its temperature. Becauserepparttar 133430 pressure is so dependent onrepparttar 133431 efficiency ofrepparttar 133432 impeller ofrepparttar 133433 compressor,repparttar 133434 impeller is very carefully designed to matchrepparttar 133435 system.

The clearances betweenrepparttar 133436 impeller andrepparttar 133437 housing atrepparttar 133438 mouth ring (impeller suction) are made very small so as to reduce leaks back torepparttar 133439 discharge.

Usually inlet vanes that throttlerepparttar 133440 gas controlrepparttar 133441 flow ofrepparttar 133442 gas, and thusrepparttar 133443 chiller load. The expansion of repparttar 133444 liquid to gas is usually made through a fixed orifice.

Google Alerts Gets Going

Written by John Calder

2004, John Calder

Do a search on Google today, and you may see an offer to "...Getrepparttar latest web results on (your search) emailed to you with Google Web Alerts." Marketers should be quick to realize this can be a useful way to monitor your own business, your competitors, your markets, and search results for your keywords.

You can set up a Google alert to monitorrepparttar 133421 top 10 Google News stories,repparttar 133422 top 20 Google web search results, or both. Enter a search term, tell Googlerepparttar 133423 type of alert you want, how often you want Google to check for alerts, & your email address. After you confirm your alert by email, you're all set.

Just think - you can use a Google web search alert to monitor search results for your highest-ranking pages, your best-paying keywords, and new markets you're thinking about entering. By signing up for alerts of volatile keywords, you can get a good idea of when a Google dance is occurring. And of course, you can monitorrepparttar 133424 ranking of your own and competitors' business pages as well.

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