Data Center Cooling System Types

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From the perspective of cooling methods, there are two main cooling methods for data center computer rooms: air cooling and liquid cooling. The cooling capacity of liquid cooling is 1,000 to 3,000 times that of air, and liquid cooling has low environmental requirements and strong adaptability. Liquid cooling is mainly divided into immersion liquid cooling and cold plate liquid cooling. In addition, what other cooling methods are used in the data center computer room?

1. The first type is traditional water-cooled or air-cooled chiller refrigeration. Air cooling, water cooling, air-liquid hybrid and cold plate liquid cooling solutions are very mature, and the immersed solution is more efficient, green and energy-saving.

The increase in chip computing power has brought about an increase in the difficulty of heat dissipation for a single chip. As the upper limit of air cooling solution capabilities approaches, it will be difficult to solve the heat dissipation problem with air cooling alone in the future.

The deployment cost of immersed liquid cooling is high, several times that of traditional data center cooling modes. It is currently mainly used in intelligent computing centers or ultra-large data centers of leading customers. In the next two to three years, it is expected to gradually be implemented in the Internet, telecommunications, finance, and manufacturing industries. Large-scale development will also go through a long process.

 

 

2. The second type is natural cooling source combined with traditional refrigeration system. This system is generally suitable for cold areas and has absolute advantages in meeting the temperature environment requirements of data center rooms.

3. The third type is fluorinated liquid immersion refrigeration. Using the 50°C boiling point characteristics of fluorinated liquid, phase change refrigeration is used to cool the CPU, and then condensation, liquefaction and reflux are used. The current test results are good. The advantage of this method is that the unit heat flux density of the phase change of the fluorinated liquid is large, which can satisfy the fan heating of the CPU with high heat flux density. In addition, some units use fluorinated liquid as a cooling system, which circulates and cools the fluorinated liquid on the basis of soaking. The heat exchange is between convection and supercooled boiling, and the heat transfer efficiency is also high. This solution requires a large amount of fluorinated liquid and the initial investment cost is high.

4. The fourth type is evaporative refrigeration. This system mainly absorbs heat and refrigeration through the evaporation of water vapor, without the need for compressor compression. The electricity load of the system is low, and the PUE can reach 1.1. However, this solution is greatly affected by the weather and is more suitable for places with low humidity and temperature, which is affected by geographical location. In addition, the refrigeration equipment is larger and requires higher investment.

5. The fifth type is absorption refrigeration. This method mainly uses waste heat for cooling, but the temperature of the heat source has a great influence on the cooling efficiency. The heat source recovered in the data center is at 50°C, so the efficiency of absorption refrigeration is very low and technically difficult. If there is a waste heat source with a higher temperature of 90℃ or above near the data center, this method is more energy-saving. This type of refrigeration solution is currently rarely used, and most scientific research institutions are still exploring absorbing materials and reducing the temperature of the recovered heat source.

6. The sixth method is to use direct cooling system for refrigeration. Freon is currently subject to restrictions due to its double carbon. The transcritical cycle or supercritical cycle of carbon dioxide can be used, but more scholars need to apply and develop it.

 

Model	ZLFQ-15	ZLFQ-25	ZLFQ-50	ZLFQ-75	ZLFQ-100	ZLFQ-150
Temp range	+5℃～35℃	+5℃～35℃	+5℃～35℃	+5℃～35℃	+5℃～35℃	+5℃～35℃
Cooling water	5℃~30℃ Adopt Siemens/Honeywell regulating valve to control cooling water flow
Temperature control accuracy	±0.2℃	±0.5℃	±0.5℃	±0.5℃	±0.5℃	±0.5℃
flow control	10～25L/min	25～50L/min	40～110L/min	70～150L/min	150～250L/min	200～400L/min
	The flow control is adjusted by frequency converter, the accuracy is ±0.3L/min
Cooling capacity (MAX)	15kW	25kW	50kW	75kW	100kW	150kW
Storage volume	15L	30L	60L	100L	150L	200L
Brine	Water, silicone oil, fluorinated liquid, ethylene glycol aqueous solution, etc.
Medium pipeline	SUS304	SUS304	SUS304	SUS304	SUS304	SUS304
In and out interface size	G3/4	G1	G1	DN32	DN40	DN50
Cooling water interface	G3/4	G1	DN40	DN50	DN50	DN65
Cooling water flow 7～20℃	2.5m³/h	4m³/h	8m³/h	13m³/h	17m³/h	25m³/h
380V 50HZ	1kW	1.5kW	3kW	4kW	5kW	6kW
shell	Cold-rolled sheet spray RAL7035

 

Model	ZLFQ-200	ZLFQ-250	ZLFQ-300	ZLFQ-400	ZLFQ-500
Temp range	+5℃～35℃
Temp accuracy	±0.5℃
Flow control	15～30m³/h	20～35m³/h	25～40m³/h	30～60m³/h	40～70m³/h
Cooling capacity（MAX）	200kW	250kW	300kW	400kW	500kW
Storage volume	250L	300L	600L	1000L	1200L
Medium	Water, silicone oil, fluorinated liquid, ethylene glycol aqueous solution, etc.
Medium pipeline	SUS304
In and out interface size	DN65	DN65	DN65	DN80	DN80
Cooling water interface	DN80	DN80	DN100	DN100	DN125
Cooling water flow 7～20℃	34m³/h	43m³/h	51m³/h	69m³/h	86m³/h
Power supply 380V 50HZ	7kW	7kW	8kW	9kW	13kW
shell	Cold-rolled sheet spray RAL7035

 

 

We provide complete temperature control system design and manufacturing. From standard models to complete customized products up to 1000 tons. We specialize in customer service and are dedicated to helping each customer have the optimal temperature control system for their specific need.

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