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What are the energy-saving measures for the central air-conditioning system?

Release time:

2023-11-21

Automatic control technology to control energy saving: in intelligent buildings, building equipment automatic control system is usually used to monitor the status of the new fan, return fan, variable air volume fan, fan coil and other devices at the end of the central air conditioning system and use "fine" control to achieve the purpose of energy saving.

1. automatic control technology to control energy saving: in intelligent buildings, building equipment automatic control system is usually used to monitor the state of the new fan, return fan, variable air volume fan, fan coil and other devices at the end of the central air conditioning system and use "fine" control to achieve the purpose of energy saving.

2. frequency converter to control energy saving: in order to reduce the energy waste of the central air conditioning system, it is appropriate to adopt the general frequency converter to control the water pump and fan of the air conditioning system, and adjust the water pump and fan through the collection of the pressure difference or temperature difference between the supply and return water. In order to achieve energy saving effect. This control method can usually save about 20% of the electric energy of the motor drive system such as water pump and fan, up to 30%.

3. reduce the cooling water temperature: the lower the cooling water temperature, the higher the refrigeration coefficient of the cold machine. The water supply temperature of the cooling water rises by 1 degree Celsius, and the COP of the cooler drops by nearly 4%. Reducing the cooling water temperature requires strengthening the operation and management of the cooling tower.

4. increase the chilled water temperature: the higher the chilled water temperature, the higher the refrigeration efficiency of the chiller. The chilled water supply temperature is increased by 1 degrees Celsius, and the refrigeration coefficient of the cooler can be increased by 3%, so do not blindly reduce the chilled water temperature in daily operation. First of all, do not set too low chiller chilled water set temperature. Secondly, be sure to close the water valve of the chiller that stops running to prevent local chilled water from going through the bypass pipeline, otherwise, the amount of water passing through the chiller in operation will be reduced, resulting in the temperature of the chilled water being reduced to too low by the chiller.

Energy-saving design of 5. fresh air system: under the condition of meeting sanitary conditions, reduce the fresh air volume or adopt variable air volume system for adjustment according to actual needs. The use of indoor energy for preheating and pre-cooling of fresh air (I. e. heat recovery technology) with exhaust system can effectively reduce the energy consumption of air conditioning system.

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Analysis of Energy Saving Control Characteristics of Central Air Conditioning System