Refrigeration system and refrigeration method for data center

A refrigeration method of a refrigeration system for a data center,

• wherein the system comprises:
• a first heat exchanger disposed on a back plate of an indoor cabinet of the data center, and a phase-change heat-exchange cooling tower disposed outdoor of the data center;
• the first heat exchanger and the phase-change heat-exchange cooling tower are communicated by a secondary refrigerant delivery pipeline,
• the method comprising the following steps:
• the secondary refrigerant delivery pipeline obtains a secondary refrigerant in liquid-state from the outdoor phase-change heat-exchange cooling tower of the data center;
• the secondary refrigerant delivery pipeline delivers the secondary refrigerant in liquid-state to the first heat exchanger in the indoor of the data center so that the secondary refrigerant in liquid-state absorbs heat on the first heat exchanger and becomes gas to refrigerate for the indoor of the data center;
• the secondary refrigerant delivery pipeline delivers the secondary refrigerant in gas-state to the phase-change heat-exchange cooling tower;
• the phase-change heat-exchange cooling tower transfers heat carried in the secondary refrigerant in gas-state into air and condenses the secondary refrigerant to a liquid again;
• wherein the step of the secondary refrigerant delivery pipeline delivering the secondary refrigerant in gas-state into the phase-change heat-exchange cooling tower specifically comprises:
• the secondary refrigerant delivery pipeline transfers the secondary refrigerant in gas-state to the second heat exchanger in the phase-change heat-exchange cooling tower;
• the step of the phase-change heat-exchange cooling tower transferring heat carried in the secondary refrigerant in gas-state into air and condensing the secondary refrigerant to a liquid again specifically comprises:
• the second heat exchanger transfers the heat carried in the secondary refrigerant to air under the blowing of the fan located thereabove, and condenses the secondary refrigerant into a liquid again;
• the method further comprises:
• an air pump is disposed in the phase-change heat-exchange cooling tower and on a by-pass of the secondary refrigerant delivery pipeline to pressurize the secondary refrigerant in gas-state delivered in the secondary refrigerant delivery pipeline to increase the condensing pressure for condensing the secondary refrigerant to a liquid again;
• the second heat exchanger delivers the condensed secondary refrigerant into the liquid storage tank.