Comparison of the advantages and disadvantages of open water cooling and closed water cooling
The cooling principle of open water cooling is by spraying circulating water on the glass fiber filler, through the contact of water and air, to achieve heat exchange, and then a fan drives the airflow in the tower to circulate, which will exchange heat with water. The hot air flow is carried out to achieve cooling. The cooling principle of closed water cooling is simply two cycles: an internal cycle and an external cycle.
Advantages of open water cooling
Open water cooling has a simple structure and low cost; easy cleaning, maintenance and repair; open water cooling is the most commonly used equipment in early cooling equipment, with mature technology; open water cooling mostly uses glass fiber reinforced plastic shell, which is fiber reinforced plastic. A reinforced plastic that uses glass fiber or its products as a reinforcing material. It has the corrosion resistance of glass and the hardness of steel, and the production cost is relatively low.
Disadvantages of open water cooling
With open water cooling, the fan motor and blades are exposed to the air, so the noise during operation is relatively large (Note: Regarding the large noise, energy-saving transformation of the cooling tower can be carried out, which can not only control the noise, but also It can also save energy and electricity); because it is an open system, when the cooling tower is in operation, it will produce water floating, causing water loss, frequent water replenishment, and at the same time, it will pollute the cooling water to a certain extent, causing its water quality to decline, and External debris will also enter the cooling water, causing water pollution; the pressure loss of the cooling water of the open water cooling is higher than that of the closed water cooling.
Advantages of closed water cooling
Since the enclosed water cooling is a fully enclosed circulation cooling, there is no debris entering the cooling pipeline system, thereby causing pipeline blockage; enclosed water cooling is soft water circulation cooling, and there will be no scale formation at high temperatures, causing cooling Scaling in the piping system; closed water cooling covers a small area, does not need to excavate pools, is easy to site, saves water, and reduces energy consumption; closed water cooling uses air-cooled evaporation and heat absorption dual cooling methods, high cooling efficiency; direct Cooling water, oils, alcohols, quenching liquid, salt water and chemical liquids, etc. The medium has no loss and the composition is stable; due to the closed loop, the medium is not affected by the environment and will not pollute the environment; the pressure loss of the cooling water is required Less than open water cooling.
Disadvantages of closed water cooling
Because a large number of high heat exchange performance but expensive copper coils are used, the price of enclosed water cooling is generally higher; the temperature in northern areas is lower in winter, if effective anti-freezing measures are not taken, it may cause partial freezing and cracking of the cooler; enclosed water cooling The shell is mostly made of aluminum-zinc plate or stainless steel, one is metal and the other is reinforced plastic, and the cost of the made cooling tower is relatively high.