High efficient evaporative cooling technology for refrigeration industry

After years of practical exploration in the refrigeration industry, the increasing maturity of evaporative cooling technology has provided new ideas for improving the energy efficiency of chillers. Evaporative condensation technology is efficient, energy-saving and green. By reducing the condensation temperature, the energy efficiency of H.Stars chillers is increased by about 20% More and more users prefer evaporative chillers

Principle of evaporative condenser

The evaporative condenser combines the condensation process of the water-cooled condenser and the cooling tower with the water cooling process. It uses cooling water to form a thin film on the surface of the heat exchanger, and the water film directly contacts the forced air. The material to be cooled transfers heat to the water film. The water film undergoes unsaturated evaporation and exchanges and transfers heat and mass with the air. Finally, the air takes away the heat. It improves the traditional cooling method in two ways: one is to subtract the transfer process of cooling water from the condenser to the cooling tower, directly realize the reuse of water, and save the power consumption of the pump; the second is to change the sensible temperature of the single-phase cooling fluid The way to cool the material is to use the latent heat of the water to remove the heat.

Coil evaporative condenser

H.Stars evaporative condenser combines the condensation process of the water-cooled condenser and the cooling tower with the water cooling process. It uses cooling water to form a thin film on the surface of the heat exchanger, and the water film directly contacts the forced air. The material to be cooled transfers heat to the water film. The water film undergoes unsaturated evaporation and exchanges and transfers heat and mass with the air. Finally, the air takes away the heat. It improves the traditional cooling method in two ways: one is to subtract the transfer process of cooling water from the condenser to the cooling tower, directly realize the reuse of water, and save the power consumption of the pump; the second is to change the sensible temperature of the single-phase cooling fluid The way to cool the material is to use the latent heat of the water to remove the heat.

Advantages of using evaporative condenser

①Energy saving. The evaporative condenser combines the condensation of water vapor and the water cooling process, omitting the transfer stage of cooling water from the cooling tower to the condenser, and the circulating water volume is only 5% ~ 10% of the water-cooled type, which effectively saves The input power of the cooling water pump; on the other hand, the cooling water temperature of the evaporative condenser is closer to the temperature of the air wet bulb, and its corresponding condensation temperature can be lower. Its condensation temperature is 10 ~ 15 ° C lower than that of the air-cooled condensation system, compared with the water-cooled The condensing system is 3 ~ 8 ℃ lower, which further improves the energy efficiency of the refrigeration host.

② Save water. The temperature rise of the cooling water in the condenser is about 5 ~ 8 ° C, that is, 1kg of water takes away 25 ~ 35kJ of heat, while the evaporative condenser mainly completes the heat exchange by the latent heat of cooling water, 1kg of water can be taken away by endothermic evaporation The heat consumption of 2450kJ. In addition, the water consumption of the evaporative condenser is only 1 ‰ -3 ‰ of the heat removal, making the actual water consumption of the evaporative condenser 5% ~ 15% of the cooling tower system, saving water resources.

③Good heat exchange performance. On the one hand, due to the large latent heat of evaporation of water and the large amount of heat absorbed per unit of water, water, air and cooling medium flow alternately inside and outside the heat exchanger to make the heat transfer speed faster and the heat transfer efficiency increase, thereby achieving efficient heat transfer Effect; on the other hand, because of its enhanced heat exchange technology, the efficiency of the system can be greatly improved.

④Small footprint. The evaporative condenser integrates the condensing coil group, circulating water pump, axial flow fan, water collecting pan and connecting water pipe to integrate the cooling process, and the structure is very compact, so its footprint is only equivalent to the condenser and cooling The total area of the tower is 30% ~ 60%, which is of great significance in today's increasingly tense land resources.

⑤ Low operating cost. In operation, in addition to the energy-saving and water-saving effects described above, the evaporative condenser also eliminates the water treatment problems caused by the large amount of water in the cooling tower system, which greatly reduces the operating cost. The combined initial investment of the condenser and cooling tower is actually higher than that of the evaporative condenser.