With the continuous development of industrial refrigeration technology, closed circuit cooling tower, as an environmentally friendly and energy-saving refrigeration equipment, is widely used in the field of industrial refrigeration. With the improvement of energy and environmental protection requirements, green environmental protection has become an important development prospect in the field of industrial refrigeration. This paper will analyze the green environmental protection of industrial refrigeration closed circuit cooling towers, and provide reference for technology research and development and application in related fields.
1. The principle of closed cooling tower
The closed cooling tower uses water as the cooling medium, and transfers the heat in the water to the air according to the heat exchange with the air, so as to achieve the purpose of cooling water. In general, the cooling water is reversed heat transfer by heat exchanger elements such as coils or packings and air. During heat transfer, vapor passes over the surface of the water, generating heat in the water, which cools the water.
Second, the development of energy-saving technology
1.Efficient heat exchanger elements
The heat exchange element is the core component of the closed cooling tower, and its heat transfer efficiency is directly related to the cooling effect and energy consumption. Traditional closed circuit cooling towers generally use copper tubes or plastic packings as heat exchange elements, and the heat transfer efficiency is low. In order to ensure the heat transfer efficiency, high thermal conductivity materials such as copper alloy and stainless steel can be used, or high-efficiency heat exchange elements such as excellent finned tubes and bellows can be used. This new type of heat exchange element greatly improves the heat transfer efficiency, reduces the heat exchange area and volume, and thus reduces the initial investment and operating energy consumption of the equipment.
2.Improve water system design
Water system design is also an important factor in harming the characteristics of closed circuit cooling towers. According to the optimal design of the water system, such as the speed control pump, control valve and other control systems, it can save energy and reduce emissions, and reduce the waste of water resources. At the same time, the flow field and temperature field of the water system are improved, the fluid resistance is reduced, the heat transfer efficiency is improved, and the resources and consumption are saved.
3.Intelligent control technology
Intelligent control technology is one of the important means to promote the energy saving of closed cooling towers. Through the installation of sensors, actuators and other equipment, the working atmosphere and environmental parameters of the cooling tower are monitored in real time, and the operating parameters of the cooling tower, such as air volume and water volume, are adjusted according to the set control system to improve the working state. The application of intelligent control technology not only improves the operating efficiency of the equipment, but also reduces manual intervention and maintenance costs.
4.Waste heat ** technology
In industrial refrigeration, it is often accompanied by a large amount of waste heat. In order to make the most of this waste heat resource, waste heat ** technology converts waste heat into useful energy. For example, the hot water in a closed circuit cooling tower is used to heat and heat fresh air and complete the energy cascade. This not only saves resources, consumption and resource costs, but also reduces the environmental impact.