Tube-type dew point indirect evaporative cooling air conditioner

Abstract

The invention provides a tube-type dew point indirect evaporative cooling air conditioner. The tube-type dew point indirect evaporative cooling air conditioner comprises a shell, an air blower, a heatexchange tube group and a water distribution system, wherein an air outlet is formed in the top of the shell, an air inlet and an air supply opening are formed in the two sides of the middle of the shell, and the heat exchange tube group and the water distribution system are arranged in the shell; the heat exchange tube group comprises a plurality of vertical heat exchange tubes with transverse ribs on the outer sides of the tubes, and a porous water absorption layer is arranged on the inner surface of each vertical heat exchange tube; the water distribution system comprises a spraying deviceand a circulating water tank, the circulating water tank is connected with the spraying device through a pipeline, and a circulating water pump is arranged on the pipeline; and the spraying device comprises a water distribution pipe and a spraying pipe, the upper end and the lower end of the heat exchange tube group are fixed in the shell through a porous plate, a secondary air inlet chamber is formed between the porous plate at the lower part and the circulating water tank, and the transverse ribs are different in size at the corresponding vertical heat exchange tubes according to differentheat exchange degrees of the cooling air conditioner. According to the tube-type dew point indirect evaporative cooling air conditioner, the structure is compact, the consumption of equipment manufacturing materials is reduced, and the heat exchange efficiency and the refrigeration energy efficiency ratio are greatly improved.

Description

technical field [0001] The invention belongs to the field of air conditioning equipment, and in particular relates to a tube-type dew point indirect evaporative cooling air conditioner whose air supply temperature approaches the dew point temperature of the air intake. Background technique [0002] The basic principle of evaporative cooling technology is to use the heat and moisture transfer that occurs when unsaturated air contacts with water to obtain cold energy. This cooling technology uses water as the refrigerant, without the emission of CFCs and HCFCs, and its operating energy consumption is lower than that of the conventional direct expansion mechanical compression refrigeration method. It is an economical, environmentally friendly and sustainable refrigeration technology. Broad application prospects. [0003] Evaporative cooling is mainly divided into two basic forms of direct evaporative cooling and indirect evaporative cooling, and indirect evaporative cooling he...

AI Technical Summary

Problems solved by technology

However, the flow channel of the plate-type indirect evaporative cooler is narrow, and fouling and blockage are prone to occur in the flow channel, which increases the resistance in the flow channel, thereby reducing the heat exchange efficiency of the heat exchanger; and there is thermal resistance on the dry and wet channel side imbalance problem

At present, the commonly used tube-type indirect evaporative cooler uses the secondary air outside the tube to exchange heat and mass with the water film outside the tube, and the primary air inside the tube is cooled. Unbalanced resistance, resulting in low cooling efficiency

In the case of obtaining the same cooling capacity, the equipment volume and material consumption are larger

In addition, the traditional indirect evaporative cooler has a limited air cooling range, and the theoretical minimum supply air temperature is the wet bulb temperature of the incoming air

Therefore, the above-mentioned weaknesses of traditional indirect evaporative coolers hinder the further promotion and use of this cooling technology.

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