Application research on waste heat utilization technology in data centers using indirect evaporative cooling technology

Based on the problems such as no energy saving, high operating cost and no recovery of waste heat in winter heating of auxiliary and support areas in data centers using indirect evaporative cooling air conditioning units, three different waste heat utilization schemes are put forward. The three schemes are to set the heat exchange units to recover the waste heat in the return air sections of the indirect evaporative cooling air conditioning units, recycle the waste heat with the air handling units, and direct heating by auxiliary compressor of the indirect evaporative cooling air conditioning units. The design, control logic, application scenarios, advantages and disadvantages of each waste heat utilization scheme are introduced. A data center is taken as an example, and the equipment selection, initial investment, operating power consumption, operating cost and so on are analysed. This paper provides a reference and solution for the design of waste heat utilization system in this kind of data centers.