Abstract
The traditional refrigeration method of internet data center (IDC) is mostly air refrigeration, which has undesired cooling effect and high power consumption. This study addresses this problem and proposes an evaporative air cooler (EAC) suitable for IDC. Given the high specific heat capacity of water, the evaporative condensing coil and spray device are added to the evaporative cooler to enhance the heat transfer effect. Heat and mass transfer mathematical models are established to analyze the heat transfer performance. The mathematical model is used to simulate the profile of the heat and mass transfer coefficient of the EAC with the amount of spray water and air flow. The results show that when the air flow changes from 10 to 20 kg/s, the air equivalent heat transfer coefficient increases by about 41%. When the air flow rate is 20 kg/s and the spray water volume is 0.00124 kg/(mꞏs), the total heat transfer coefficient is increased by about 308% compared with the case without spray water.
Highlights
The internet data center (IDC) is an important guarantee for the realization of emerging technologies, such as smart manufacturing, Internet +, Internet of Things and big data
Among the huge energy consumption of data center infrastructure, the energy consumption of cooling equipment usually accounts for about 60% of the energy consumption of the server room, and the cost caused by high energy consumption exceeds 50% of the entire operation and maintenance of the computer room [2]
The air mass flow contributes to the convective mass transfer and convective thermal efficiency between the water film outside the tube and the air, and it can influence the thermal performance of the evaporative air cooler (EAC)
Summary
The internet data center (IDC) is an important guarantee for the realization of emerging technologies, such as smart manufacturing, Internet +, Internet of Things and big data. The air passes through the cooler under the action of the fan, and exchanges sensible heat with the working fluid flowing in the heat exchange tube of the air cooler. This refrigeration method has a natural cooling function and is easy to operate and maintain. There is a water-cooled refrigeration method that uses water to exchange heat of the working fluid This type of air conditioning system is more complex, more. In order to solve the problems of low refrigeration efficiency, high energy consumption and large heat transfer area of traditional coolers [5], this research applies evaporative cooling technology to traditional air coolers and transforms traditional coolers. Evaporative air cooler (EAC) integrates the advantages of air cooling and water cooling, which can improve efficiency and reduce energy consumption
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