Evaporative energy-saving condenser in the refrigeration system environmental advantages

The condenser is one of the main heat exchange devices of the refrigeration system. Its role is to cool the high temperature superheated refrigerant vapor discharged from the compressor to a liquid state. Since the 1970s, developed countries have begun to replace water-cooled condensers with evaporative condensers. In recent years, China has also begun to use evaporative condensers in various types of refrigeration systems, including cold storage, central air conditioning, industrial refrigeration units, and ammonia refrigeration systems.

Evaporative condenser performance advantages:

1 water saving

The evaporative condenser makes full use of the latent heat of vaporization of water. A typical water-cooled condenser can carry 16.75-25.12 KJ of heat per 1 kg of cooling water, while 1 Kg of water can carry away about 2428 KJ of heat at room temperature, thus evaporative condenser theory. The water consumption is only 1% of the water-cooled condenser. Considering the factors such as spatter loss and water change, the actual water consumption is about 5% to 10% of the water-cooled type. The evaporative condenser has greatly reduced the loss of water and is of great significance to the northern region where water resources are seriously deficient in China.

2 energy saving

Similar to the air-cooled condenser, the condensing capacity is limited to the ambient dry-bulb temperature, and the evaporative condenser is limited to the ambient wet-bulb temperature, and the wet-bulb temperature is lower than the normal dry-bulb temperature by 8 to 14°C, plus the upper fan The negative pressure environment is caused to the equipment, so the condensing temperature of the evaporative condenser is lower than that of the air-cooled condenser. As the condensing temperature increases by 1°C, the power consumption per unit of cooling capacity will increase by 3% to 3.5%. Therefore, the total power consumption of the evaporative condenser will also be significantly reduced, and the energy saving effect will be significant. Compared to other cooling condensers in the HVAC system, it can save energy by 20% to 40%.

3, compact

Because there is no need to install a cooling tower, the entire device has a compact structure, a small volume, a small footprint, and easy installation, and the daily maintenance workload is small.

4, does not pollute the environment

Many chemical plants used shell-and-tube or showered condensers in the past. In summer, because of the high condensing pressure, they often used a “venting and depressurizing” method. However, each time it was released, it was not a non-condensable gas that contained a large amount of ammonia. According to sampling and analysis by relevant departments, sometimes as high as 90%, not only ammonia losses are quite serious, but also cause environmental pollution. However, this phenomenon does not exist after using an evaporative condenser.

At present, Western developed countries generally use evaporative condensers. In the four applications, due to the lack of water in the northwestern regions, evaporative condensers are used in the northwestern regions, and hotel buildings, office buildings, shopping malls and other civilian buildings and workshops are Cooling air-conditioning equipment such as cold storage, greenhouses, etc., basically use a hair-saving condenser.

For example, a certain aquatic product company's 10,000-ton-class cold storage, the original configuration is a vertical shell-and-tube condenser, cooling water directly with natural lake water, supporting three pumps. The condenser used is seriously corroded and the equipment maintenance is high. Later, an evaporative condenser was used instead of the original vertical shell-and-tube condenser. The annual cost savings was about 300,000, and the equipment failure rate became smaller, and the improvement effect was obvious in all aspects.

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