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Principle And Dependent Factors Of Cooling Tower Cooling Effect
Aug 17, 2017

Principle and Dependent Factors of Cooling Tower Cooling Effect
   The effect of the Cooling Tower is to carry waste heat of the cooling water inside the tower with the air heat exchange, so that waste heat to the air and into the atmosphere. The generic term "Cooling Tower" is used to describe direct (open) and indirect (closed) cooling equipment. While most of them come up with a "Cooling Tower as an open direct contact with the heat sink," the indirect Cooling Tower, sometimes referred to as the "closed circuit of the Cooling Tower", is also a Cooling Tower.
    A direct, or open-circuit Cooling Tower is a means of sealing the inside of the structure by spraying the circulating water onto the filler of the glass fiber by spraying. The filler provides a greater contact surface, through the water and air contact, to achieve heat transfer effect. And then the fan to drive the tower air circulation, will heat with the heat after the heat out, so as to achieve cooling.
    Indirect or closed Cooling Towers are not involved in direct contact with air and liquid, usually water or glycol mixtures are cooled. The difference is the open Cooling Tower, the Cooling Tower indirectly has two separate fluid circuits. One is the external circuit where the water is in the second track, which is the tube outside the loop (non-public coil) connected to the hot fluid process is cooled and returned in the closed circuit. The air is drawn by circulating the cascade of water throughout the heat pipe, providing a similar evaporative cooling Cooling Tower open. In the operation of the heat flow from the internal fluid circuit, through the coil wall, the external circuit, and then by the air and some of the evaporation of water heating to the atmosphere. Indirect Cooling Tower action, so very similar to open the Cooling Tower with an exception. This process is carried out by the coolant in a "closed" loop, which is not directly exposed to the atmosphere or outside the circulating water.
    In the countercurrent Cooling Tower air travel up through the filling or tube, the opposite water downward movement. In the cross flow Cooling Tower the horizontal movement of the air moves down by filling the water.
    The Cooling Tower also has a feature in which the aeronautical means of movement of the mechanical ventilation Cooling Tower depends on the electric drive of the fan to attract or force the tower air. The natural ventilation Cooling Tower uses a high growth of the exhaust chimney to provide air buoyancy. The fan-assisted natural ventilation Cooling Tower uses a mechanical draft to increase the buoyancy effect. Many of the early Cooling Towers rely on the air to produce air drafts.
    If the cooling water is returned from the Cooling Tower to reuse, some water must be added to the replacement or composition, and the part of the flow evaporates. As the evaporation includes pure water, the concentration of dissolved minerals and other solid circulating water tends to increase unless some dissolution, such as the fight against solid control means, is provided. Some of the water is also lost with the ongoing exhaust (drift) droplets, but this is usually reduced to a very small amount of installation baffle-like device, known as drift exclusion, to collect droplets. The amount of compensation must be equal to the evaporation, blowing down, the total drift, such as wind blowout and other water leakage losses, to maintain a stable water level.
    Use the Cooling Tower is to achieve a certain cooling effect, cooling effect depends on the heat sink, fan air volume. Cooling Tower using water, ventilation conditions, the installation location will have a certain impact on its effect. Then we take a look at the Cooling Tower heat sink and fan air volume on the cooling system:
    one. Heat sink: is a key component of the Cooling Tower, small towers generally use PVC sheet hot or hot suction, large towers will use wood, the main purpose of the air and water contact surface does not affect the wind resistance, the bigger the better, Heat exchange rate also reached the maximum, the heat sink affect the effect of heat transfer of the two parameters, mainly the shape and height of the heat sink, in the water tower installation, try not to damage the heat sink, so as not to heat the film flow is poor.
    two. Fan air volume: its main acceleration in the tower air flow, speed up the air and water heat exchange, take away the heat. Affect the fan air volume is mainly the shape of the fan leaves the width of the wide and its own angle, fan speed, installation angle, speed and motor and transmission ratio. In addition, in the case of a certain amount of air, the same type of tower, the amount of cooling water is smaller than the cooling water cooling effect is better.