亚洲欧美日韩中文字幕一区二区三区 ,青草青草久热精品视,亚洲AV无码成人精品区在线观看,精品国精品无码自拍自在线,日本中文字幕一区二区高清在线,欧洲欧美人成视频在线,国产精品亚洲A∨影院久久久久,久久精品国产只有精品66,午夜性a一级毛片免费一级黄色毛片 ,中文字幕网伦射乱中文

Overview Taxonomy Situation Intelligent

Central air conditioning - overview

Air conditioning, referred to as air conditioning, that is, after a certain treatment of the air, a certain way into the room, so that the indoor air temperature, humidity, cleanliness and flow rate control in the appropriate range to meet the comfort and production process Need a special skill. Central air conditioning system is a host (or a set of refrigeration systems or air supply system) through the air duct or hot and cold water to drive a number of ways to achieve the purpose of indoor air conditioning system.

Central air conditioning - overview

And the clean industry-related host system commonly used are:

Water-cooled direct expansion unit (air-cooled system similar to + outdoor unit) for small air-conditioning works, the initial investment is low, energy efficiency is relatively low
Cold water host system for large air-conditioning projects, the initial investment is moderate, energy efficiency is relatively high
Ice storage system (water storage system similar) for large air conditioning projects, the initial investment is higher, through the peak price of electricity to save the cost

Three systems are suitable for different air-conditioning projects, pre-planning, energy consumption statistics can be taken from the economic considerations, select the host system.

End - system classification

External air conditioning box (MAU) and circulating air conditioning box (RCU) w
Duct layout is more complex, low energy consumption, MAU + RCU improved many, but cleanliness is easier to maintain
Pure cycle air conditioning box (RCU) way
The system is the most energy-efficient, large-scale and high cycle of the clean room design does not apply, but the lower cost, small scale, clean level of clean room design is very suitable for
External air conditioning box (MAU) and circulating air conditioning box (RCU) w
Low cost, but the duct is more complex, is not conducive to large-scale or the use of flexible large clean room, can be used as a reference to improve the case
External air conditioning box and cooling dry coil way
The most energy efficient, clean room operation flexible, for the current mainstream design, but the initial high cost for its shortcomings