It adopts a standard 2U structure design and is installed on a standard 19-inch liquid-cooled cabinet.
 
l Related technology usage requirements
1. Inlet water temperature control
1) Control requirements: constant control of inlet water temperature with control precision±2℃
2) Control range: 20℃~50℃ @ normal mode; 20℃ ~40 ℃ @ high performance mode
Remarks: If the liquid inlet temperature fluctuates greatly, the hashrate will be unstable. If the liquid inlet temperature is too high, the machine will work by reducing the frequency and hashrate.
 
2. Inlet Flow Control

1) Control requirements: constant control of influent flow with control precision±10%

2) Control range: flow rate of a single machine ≥ 10L/ min, 10L / min corresponds to the temperature difference between inlet and outlet water 10 ℃ @ normal mode, 1 4 ℃ @ high-performance mode

Note: If the liquid inlet flow fluctuates too much, the chip temperature will fluctuate too much, resulting in an unstable hashrate of the machine; if the flow rate is too low, the liquid outlet temperature will be too high, and the machine will work at the lower frequency and hashrate.
 
3. Server inlet water pressure control

1) Control range: ≤ 30 5kpa

Note: If the pressure is too high, the internal water system of the machine may be damaged, and the damaged machine is not guaranteed.
 
4. liquid media control

1) Primary liquid medium: primary deionized water: meet the requirements of national standard GB /T 6682-2008 primary deionized water;

2) Conductivity control range: ≤ 100 us/cm ;

3) PH control range: 6 ~ 8 ;

PH of the liquid medium exceeds the standard, the cold plate will be at risk of corrosion and blockage. The long-term operation will cause the machine to reduce the frequency and hashrate, and the damaged machine will not be guaranteed.
 
5. circulatory system
1) Pipeline: Anti-rust and anti-corrosion, it is recommended to use stainless steel
Remarks: Carbon steel pipe has a lot of welding slag, which is not easy to clean, and is easy to rust and corrode. The cold plate has the risk of corrosion and blockage. The long-term operation will cause the machine to reduce the frequency and hashrate, and the damaged machine is not guaranteed.

2) Filter: configure 2 70 mesh filters;

Remarks: If the filter mesh is too low, the large particles of impurities in the system cannot be filtered out, and the cold plate joint is at risk of blockage, which will cause the machine to reduce the frequency and hashrate, and the damaged machine will not be guaranteed.

3) of system components: ≥ 85 ° C ;

Note: If the temperature resistance of the cooling system components is lower than 85 ℃ , it is easy to cause damage to the system components or even leakage of the liquid medium, which will affect the normal operation of the machine.

4) Circulating pump: It is recommended to use one and prepare one to improve the reliability of the system ;

5) System pipeline pressure test and leak detection: It is recommended to use an air compressor for gas detection and use the soap bubble method to test the tightness of the welding joint;

Remarks: If water inspection is used in winter, the system equipment needs to be drained to prevent freezing, and equipment that is not easy to drain clean is at risk of freezing. The gas detection efficiency is high, and the tedious work of draining and antifreezing the system equipment is omitted during leak detection in winter;

6) Exhaust and drain valve: install automatic exhaust valve at a local high position and install drain valve at a local low position. In addition, it is recommended to install manual exhaust valves in multiple places in the system, which can improve the efficiency of the first injection of the system ;

7) other:

To prevent the system pressure from being too high, the system needs to be equipped with a 3.5bar safety relief valve;

Remarks: Please ensure that the pressure relief valve has been adjusted before running, otherwise, the water inlet pressure of the machine is more than 530 kpa, and the damaged machine will not be guaranteed ;
 
To prevent system pressure fluctuations, the system is equipped with a constant pressure expansion tank;

Remarks: Please ensure that the pressure value of the expansion tank has been adjusted before the operation, otherwise the constant pressure expansion tank will not work, which will easily cause the water inlet pressure of the machine to >305kpa , and the damaged machine will not be guaranteed ;
 

Before the cabinet is connected to the cooling system, use deionized water to clean and filter the system pipeline to remove impurities such as dust and welding slag; prevent impurities from blocking the inlet and outlet water joints of the machine;

Remarks: Impurities block the water inlet and outlet joints of the machine, resulting in too little water flow to the machine, which in turn reduces the frequency and hashrate of the machine. The damaged machine is not guaranteed.
 

The circulatory system is recommended to be equipped with an ultraviolet lamp sterilization device to prevent the liquid from breeding bacteria and the system's heat dissipation capacity to be attenuated.

Comprehensive application scheme of comprehensive energy hashrate system
1.System Overview