How the cooling tower works

2019-02-22

1. There must be a certain amount of surplus energy (20%-25%) in the cooling tower circulating water system. When running, this energy is concentrated at a certain valve, and the energy is lost in a long time. The external turbine is converted into high-efficiency mechanical energy by using these “rich energy”, so that the cooling tower fan motor can be replaced 100% for power saving purposes.

2. The key to how the external turbine can achieve the motor drive efficiency is to understand the surplus energy in the design of the cooling tower circulating water system. At the same time, the turbine impeller design is also the key. The composition of the surplus energy is mainly composed of the following six parts:

1) The margin value that must be considered when designing the circulating water system;

2) potential energy utilization of heat exchange equipment;

3) The self-regulating ability of the turbine;

4) kinetic energy conversion efficiency of the circulating water system;

5) The energy consumed by the valve when the valve is not in place.

6) Low flow meets system requirements by combining and re-splitting methods.

3. Cooling tower old tower energy-saving renovation

The cooling tower is driven by a water pump between the cooling tower and the heat exchange equipment. The external turbine uses the backwater pressure energy to convert and drive the turbine to work as a fan. Generally, energy saving is carried out according to three cooling towers. The flow rate is too large during design. About %, considering the change in production demand, the energy-saving transformation method is: two towers are driven by a turbine, and one tower is driven by a motor in the summer time.

4. Cooling tower new tower design

The focus of the external turbine is on the return pressure or return flow to meet the function of the turbine to drive the fan, the law of conservation of energy - how much backflow or pressure conversion = how much fan speed. The external turbine speed is increased or decreased according to the increase or decrease of the system flow. The system has three external turbine cooling towers and three towers for the turbine outlet pipe. The bypass valve is used to adjust the flow and facilitate maintenance.

Cooling Tower

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