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Energy Efficiency
Containment Solution for Data Center Improves Energy Efficiency
 
Introduction
 
With the vigorous development of the Internet industry and the rapid growth of social economy, there is an increasing demand for data centers. A large number of IT equipment, such as servers and supercomputers, are gathered in the data center, accompanied by extremely high power consumption and heat generation, which impose harsh requirements on the operating environment.
 
For the reliable operation of the equipment, ventilation and heat dissipation are necessary. Data center water-cooled Cabinets are adopted as an efficient cooling solution.
 
Functional principle
 
From the perspective of structural features, the equipment is an integrally sealed structure, which basically avoids the forced convection between the inside of the cabinet and the outside air, and realizes the independent refrigeration cycle of the equipment to a minimum.
 
Therefore, the water-cooled cabinet equipment can be considered as its cooling effect does not depend on the environmental conditions of the computer room. When the temperature of the computer room is in a higher range, the equipment operates normally.
 
As shown in the figure below, the internal airflow circulates between the IT data cabinet and the air-conditioning cabinet: the high-temperature air heated by the IT server enters the air-conditioning cabinet through the ventilation mesh at the rear of the cabinet, and the cold water coil in the air-conditioning cabinet will be connected in series Take it away, so as to cool down to obtain low-temperature airflow, and send it back to the front of the IT data cabinet through the ventilation mesh in the front of the cabinet, and finally be sent into the IT server for heat dissipation.
 
When the load of the IT server reaches 40KW, the temperature of the high-temperature airflow can often be close to 50°C, and the temperature of the low-temperature airflow after high-efficiency cooling can be controlled below 26°C.
 
Structure
 
On the left side of the water-cooled cabinet is the air conditioning system, the main components: regulating fan, heat exchange coil, flow meter/BTU meter, connecting water pipe. On the right is a standard IT cabinet for customers to place rack-mounted IT equipment. Equipped with 4U thermal manager, used for the monitoring and management of the electrical energy, thermal energy, alarm and other systems of the entire cabinet.
 
Application of BTU meter
 
BTU meter (or called energy meter, heat/cold meter) can be defined by measuring the energy consumption of hot/cold water, including flow measurement sensors, temperature sensors, and the processing unit.
 
The flow sensor is installed in the chilled water return pipe along the direction of chilled water flow. Two temperature sensors, one is installed on the return line, the second sensor should be installed on the supply line. The amount of heat energy transferred from the cooling water to the heat exchange coil in a defined time period is proportional to the temperature difference between the flow rate and the return flow and the amount of cooling water flowing through. Based on this, the amount of heat increase or decrease in the cooling water can be calculated.
 
Compared with the traditional server air-conditioning room, the advantage of the integrated water-cooled cabinet is independent cooling and does not depend on the room environment.
 
In the sealed structure of the cabinet, while maintaining a certain temperature, there is a simple linear relationship between power consumption, heat generation, and temperature changes of chilled water. Arranging a BTU meter at the chilled water inlet and outlet can easily detect the temperature change of chilled water and calculate the increase in calorific value, thereby obtaining the value of electrical energy consumption. Once the heat value is abnormal, it can also reflect the abnormal energy consumption of the entire cabinet, which is conducive to the detection and maintenance of the system.

 
 
Future business prospects
 
According to the "2019-2023 China Computer Room Air Conditioning Industry Market Analysis Research Report" released by Xinsijie Industry Research, the average annual compound growth rate of the computer room air conditioner market was 10.4% from 2015 to 2017; in 2017, the computer room air conditioner market scale It was 4.85 billion yuan, a year-on-year increase of 9.4%. China's computer room air-conditioning demand still maintains a rapid growth, but the growth rate has slowed down year by year.
 
China is updating from a manufacturer of quantity to one of quality. The application scope of big data, cloud computing, 5G, and artificial intelligence technology continues to expand. The demand for data center construction continues to increase, which will drive the demand for room air conditioners to continue to rise. The future development prospects are still broad.
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