Experimental Research On The Performance Of The Back-plate Oil-cooled Radiator Of Communication Cabinet

With the development of data communication technology,the energy consumption of the data center industry has gradually increased.Among them,40?50%of the energy consumption of the data center is used in the cooling system of the communication cabinet.Choosing a suitable cooling system for the communication cabinet is expected to reduce the energy consumption by 10?15%.At present,the a ir cooling system is the most widely used cooling system in the data center,and its maximum heat dissipation capacity is only 37W/cm~2,with the expansion of the scale of the data center,the heat dissipation limitation of the air cooling system is increasingly obvious.If the amount exceeds 100W/cm~2.The air-cooled heat dissipation system has been unable to meet the heat dissipation requirements of the data communication cabinet,and a liquid-cooled heat dissipation system is urgently needed to dissipate heat from the communication cabinet.Liquid-cooled heat dissipation systems include water-cooled heat dissipation systems and other liquid-based heat dissipation systems.Due to the poor insulation of water,water-cooled heat dissipation system leakage may pose a potential safety hazard to equipment,and its engineering applications are limited.It is particularly important to use a cooling medium with good insulation performance.Transformer oil has good electrical insulation,thermal conductivity and heat recovery value in many liquid cooling media.It is suitable for use in the liquid cooling system of the data center.Improving the cooling efficiency of the communication cabinet has a positive significance.Under this background,combining the characteristics of communication cabinet and oil cooling technology,this paper proposes a back-plate oil-cooled heat dissipation device that can be applied to data center communication cabinets.An experimental test platform was designed.By setting different simulated heat source powers(800W,1600W,2400W),the heat dissipation performance of oil-cooled communication cabinets and air-cooled communication cabinets was compared and analyzed,by setting different simulated heat source powers(800W,1600W,2400W),different cooling oil initial temperature(18?,28?)and other test conditions to analyze the heat dissipation performance of the back-plate oil-cooled heat dissipation device,and establish the theoretical heat dissipation model of the back-plate oil-cooled heat dissipation device of the communication cabinet.The model and test data have been verified and analyzed to provide basic theoretical and experimental basis for the engineering application of liquid-cooled cooling technology in the data center.Under the same test conditions,compared with the air-cooled communication cabinet,the cumulative heat dissipation of the oil-cooled communication cabinet increased by 41.53%,and the average heat dissipation efficiency increased by 48.16%.Compared with the air temperature of the air-cooled communication cabinet,the internal air temperature of the oil-cooled communication cabinet is reduced by 3.4?on average in the two cabinets with the heat source power of 800?2400W and the same operating time.The maximum temperature is 52.6?,and the maximum air temperature inside the air-cooled communication cabinet is 56.1?.In the heat dissipation performance test experiment of the back plate oil-cooled heat dissipation device,the heat dissipation range of the device i s 4378.52k J?7830.20k J,the average heat dissipation is 6148.44k J.The heat dissipation per unit of power is 3842.775k J/k W.The heat dissipation efficiency of the device is distributed between 21.08%?78.42%,and the average heat dissipation efficiency is 42.17%.Under the condition that the heat source power is 2400W,the heat dissipation of the device reaches a maximum of 7830.20k J.The heat source power of the devi ce is 800W,and the maximum heat dissipation efficiency of the device is 78.41%.Under the c onditions of the same running time,the maximum temperature of the air inside the communication cabinet is 52.6?,and the average temperature of the cloth inside the cabinet is 47.7?,which is lower than the maximum allowable working temperature of80?in the cabinet.It means that the communication cabinet adopts the back-plate oil-cooled heat dissipation device,which can effectively reduce the air temperature inside the cabinet,thereby ensuring the stable and safe operation of the communication cabinet.In terms of heat recovery characteristics,when the communication cabinet is operated under the above test conditions,the cooling oil temperature and the exhaust air temperature have certain heat recovery value.The oil temperature in the heat storage box can reach a maximum of 47.6?,with an average temperature of 42.3?.The inlet and exhaust temperature of the cabinet can reach 40.6?(the average temperature of the air entering the cabinet is 26.5?),and the average exhaust temperature is 40.0?,the temperature requirement allowed by waste heat recovery has been reached.Using thermodynamic theory,the theoretical analysis of the heat balance process of the back-plate oil-cooled heat dissipation device and the communication cabinet was carried out,and its theoretical calculation model was established and verified.The relative error between the model value and the test value is 14.81%,reflecting the accuracy of the established calculation model.