HVAC: technical principle of energy-saving air conditioners in data centers

HVAC: technical principle of energy-saving air conditioners in data centers

According to statistics, air conditioning consumes 20% of the total energy consumption in the communication room ~ 45%, and some may even exceed 60%. Therefore, to ensure the normal operation of communication equipment, energy-saving should first begin with the large energy-consuming user of air conditioners.

Currently, most of the mainstream new energy-saving solutions are for air conditioners.

Fresh Air Energy Saving System

Basic Principles

The fresh air energy saving system adopts intelligent control technology and temperature and humidity sensing technology, and combines the gas and thermal principles to reasonably use the indoor and outdoor temperature differences of the data room to form heat exchange, relying on a large amount of ventilation, the heat in the data room can be quickly migrated out, so as to effectively reduce the internal temperature of the data room.

Pay attention to questions during use

Due to the introduction of fresh air outside, although filtered, dust will inevitably be introduced, leading to a decrease in the cleanliness of the data center, affecting the safety of communication equipment. Therefore, it is generally recommended to deploy the fresh air energy-saving system in common equipment rooms, mobile communication base stations, and other large equipment rooms, such as key communications buildings with high cleanliness requirements and central exchange bureaus, this system is not recommended.

The originally closed data center opened two small windows due to the introduction of fresh air, reducing the fire safety level of the data center. Therefore, the inlet/outlet should adopt the fireproof valve technology. The fire control valve is usually open. When a fire occurs, the fuse action closes the valve to cut off air circulation and prevent the fire from spreading.

Heat Exchanger energy-saving system

Basic Principles

The heat exchanger completely isolates internal and external air and uses external Cold Sources to cooling the internal environment to reduce the operation time of the air conditioner for energy saving. The two sets of fans respectively suck external cold air (external circulation) and internal hot air (internal circulation), cold and hot air exchange heat in the heat exchange core body, through the heat exchange core diaphragm, the internal hot air emits heat and reduces the temperature. The cold air after cooling is blown out from the top of the cabinet.

Pay attention to questions during use

The heat exchanger energy-saving system is similar to the fresh air energy-saving system. The main difference between the two systems is that the heat exchanger system implements heat exchange between indoor and outdoor cold air, and the gas is not mixed with each other; the fresh air energy-saving system is used to mix outdoor cold air with indoor air after filtering.

The advantage is that the data center is kept closed and the indoor air cleanliness does not decrease. However, the drawbacks of the heat exchanger are also obvious, that is, its heat exchange efficiency is relatively low, and the energy saving effect is not as obvious as that of the fresh air system.

Adaptive Control of Air Conditioning energy-saving system

Basic Principles

Changed from "manual setting" of Air-conditioning operation parameters to "automatic setting" of computer monitoring system ". The system automatically tracks the changes in temperature and humidity in the day and night, season, and region, and automatically controls the normal working status of the air conditioner so that the air conditioner can work on demand. Although the original data center was equipped with multiple air conditioners, each air conditioner was operated by a single soldier. Now, the dedicated air-conditioning group of the entire data center is in the form of "team operations" to improve the working efficiency of the unit group, optimized Combination, precise governance, and energy saving.

Pay attention to questions during use

This system is suitable for various data centers, such as communication keys and central exchange bureaus. The larger the excess air conditioning capacity, the better the sealing performance of the data center, and the higher the power saving rate. However, because the working conditions of each data center are different, the implementation of this energy-saving technology will have a long cycle, and the initial investment is insufficient. However, after the installation is complete, daily maintenance work will be simple and convenient.