Like solar, wind and other environmental friendly energy, dry air can also be used as a kind of energy and become a new motive force of refrigeration and air conditioning. Xinjiang green Angel Air Environmental Technology Co., Ltd. chief engineer Zhang Xinli of the refrigeration technology for more than 10 years, he said, with cold water to cool down in daily life is common sense, this is actually the foundation of application of evaporative cooling principle. As long as the ambient air temperature is greater than the water evaporation temperature of 18 degrees, you can cool the hot air in the surrounding environment by evaporation of water."
He also said that at present, this dry air refrigeration, air conditioning has been in Xinjiang stadiums, Urumqi International Expo Center and so on about 1 million square metres of public buildings have been applied.
Data from the test site show that the inlet air temperature of about 34 degrees Celsius and the normal temperature of water after 3 heat exchange, to the air outlet down to about 14 degrees Celsius, the whole process less than 2 minutes.
Energy saving 80%
Dry air can work principle of refrigeration and air conditioning, dry air can hold more moisture, with tap water as refrigerant, dry air in the water vapor absorption from dry to provide power for air conditioning refrigeration wet process; the water from liquid to gaseous process can absorb heat, so as to achieve cooling effect. Regional restrictions
The use of dry air as the cooling power is dry air to the biggest advantage of the refrigeration and air conditioning, but at the same time, it also become the biggest obstacle to its large-scale application, because in a relatively humid southern region, the basic air conditioning can not be used, even in relatively dry Beijing, it is still not landing.
Zhang Xinli introduced, compared with the traditional central air conditioning, dry air can not use freon refrigeration and air conditioning refrigeration and other chemical substances. The fan coil unit and the independent fresh air conditioning system are the operation hardware of the air conditioning system, and the core technology is the indirect evaporative water chiller and the multi-stage evaporative cooling air unit. They will dry the air outside by humidifying, dust removal, filtration, refrigeration, and then transferred to the building space, so inside and outside the cycle, in the realization of cooling at the same time, but also put an end to indoor air pollution problems.
"Dry air can refrigeration, air conditioning can be integrated energy saving 80%."." Zhang Xinli says. As we all know, whether the use of electricity or thermal energy as the driving force, air-conditioning is a large energy consumption, "and" dry air "is an environmentally-friendly energy, the power consumption of its equipment is only 20% of the traditional air-conditioning."." He said, assuming that the average monthly fee for air-conditioning is 100 yuan, while the dry air can be used for refrigeration and air-conditioning only 20 yuan.
As for the dry air to refrigeration and air conditioning prices, Xinjiang green Angel Air Environment Technology Co Ltd Sales Manager Yu Xiangdong said: "the initial investment will more than about a general central air conditioning low 10%." He ordinary office building, for example, the traditional central air conditioning equipment installed at 220~250 yuan per square meter, while dry air refrigeration, air-conditioning at about 220 yuan. In addition, because the dry air can be cooled, the air conditioning unit can be placed on the roof of the building, which will save hundreds of square meters of room space required by the traditional central air conditioner."
"It applies only to arid areas in the northwest." As an inventor of indirect evaporative cooling water chiller, the Chinese Academy of engineering and professor of Tsinghua University were afraid of the defects of "dry air, refrigeration and air conditioning". He also said that at present, the product can only be applied to large public buildings, office buildings, and so on, because it is too big, and in the house, like installing traditional air-conditioning installed as it still has difficulties.
Zhang Xinli also said that the residence also requires technical improvements in product equipment, but not entirely impossible. And whether Beijing can use this kind of air conditioning has yet to be discussed, mainly because the air in Beijing is not dry enough, because the air conditioner is the smaller the air humidity, the better the cooling effect.
Is in Beijing to attend the twenty-second International Conference of refrigeration of Jiang Yi said, he will be in the dry air to refrigeration and air conditioning first introduced to the world, "to the world, it is not suitable for regional narrow, like the Middle East, Central America, Australia etc. can be widely used."
However, the domestic market for dry air refrigeration and air-conditioning is still in the "baby" period". Xu Xiangdong said, although they every year, in expanding production to meet the demand of the market situation, but the dry air refrigeration and air conditioning to mass quickly occupied with the relevant market geographical limitations remains to be seen.