The microchannel heat exchanger is applied as the heat exchanger of the loop heat pipes in data center

and the evaporative cooling experiment is carried out on the side of the microchannel condenser. The influence of evaporative cooling on the microchannel condenser is measured by using the enthalpy difference chamber in the experiment

and the temperature difference between the inlet and outlet air of the microchannel condenser and evaporator with different indoor and outdoor temperature and humidity was analyzed. The experimental results show that evaporative cooling can make the condenser inlet air temperature achieve a large temperature drop and increase the temperature drop of the inlet and outlet air

while the spraying can cool the air through the heat pipe about 0.3-1.9℃ and increase about 0.1-0.6 kW heat transfer of the system. Moreover

the evaporative cooling capacity of microchannel condenser and evaporator increases with the increase of indoor and outdoor temperature difference

and decreases with the increase of outdoor relative humidity. Compared with single heat pipe air conditioning

loop heat pipe with evaporative cooling in data center can make better use of natural cooling energy

prolong the utilization time of air conditioning system in a year

and expand the application area of the system.