Performance advantages of evaporative condensers in refrigeration systems

Condenser is one of the main heat transfer equipment of the refrigeration system, and its role is to cool the high temperature superheated refrigeration medium vapor discharged from the compressor into liquid state. From the 1970s, developed countries began to use evaporative condenser instead of water-cooled condenser. In recent years, China has also begun to evaporative condenser used in various types of refrigeration systems, including cold storage, central air conditioning, industrial refrigeration units, ammonia refrigeration systems.

Evaporative condenser performance advantages:

1、Water saving

Evaporative condenser to make full use of the latent heat of vaporization of water, general water-cooled condenser per 1Kg cooling water can take away 16.75 ~ 25.12KJ heat, while 1Kg water evaporation at room temperature can take away about 2428KJ heat, so the theoretical water consumption of evaporative condenser is only water-cooled condenser 1%, taking into account the loss of splash, sewage water exchange and other factors, the actual consumption of water for the water-cooled type of about 5% to 10%. ～The actual water consumption is about 5% to 10% of water-cooled condenser. Evaporative condenser greatly reduces the loss of water, for China's serious shortage of water resources in the northern region has an important significance.

2、Energy saving

The same as the air-cooled condenser condensing capacity is limited by the ambient dry bulb temperature, while the evaporative condenser is limited by the ambient wet bulb temperature, and the wet bulb temperature is lower than the general dry bulb temperature of 8 ~ 14 ℃, plus the upper side of the fan to the equipment caused by the negative pressure environment, so the same as the air-cooled condenser compared to the condensing temperature of the evaporative condenser is lower. And condensing temperature rises 1 ℃, the unit cooling capacity of power consumption will increase by 3% to 3.5%, so the evaporative condenser total power consumption will be significantly reduced, energy saving effect is obvious. In the HVAC system relative to other cool condenser can save energy 20% to 40%.

3、Compact structure

Because there is no need to set up a cooling tower, so the whole device is compact, small size, covers an area of less, and easy to install, routine maintenance workload is small.

4, does not pollute the environment

Many chemical plants used to use shell and tube or shower condenser, summer condensing pressure is too high, often using the "air pressure", but each time the release is not non-condensable gases, which contains a large amount of ammonia, according to the relevant departments of the sampling and analysis, sometimes as high as 90%, not only is the loss of ammonia is quite serious, but also cause environmental pollution. But with evaporative condenser does not exist after this phenomenon.

At present, evaporative condenser is commonly used in developed countries in the West, in the application of four within the Northwest due to the lack of water, evaporative condenser in the Northwest more applications, hotels, office buildings, shopping malls and other civil buildings and factories and workshops and cold storage, greenhouses, etc., cooling air-conditioning equipment are basically used in the section of the hair condenser.

Such as an aquatic company's 10,000 tons of cold storage, the original configuration is a vertical shell and tube condenser, cooling water directly with natural lake water, supporting pumps three. The condenser corrosion is serious, equipment maintenance is high. Later, the use of evaporative condenser instead of the original not vertical shell and tube condenser, annual savings of about 300,000 yuan, and the equipment failure rate becomes smaller, the improvement of all aspects of the effect is obvious.