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Haiwu in Action: A Comprehensive Guide to the Renovation of Water Supply and Drainage and Fire Protection Systems in Data Rooms (1)

Publication Date:2024-10-21

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Section 1 Requirements for water supply and drainage renovation of data rooms

1. The data room is a place that provides an operating environment for electronic information equipment, and a variety of IT equipment needs to be installed and maintained 24 hours a day. Data room business interruption may lead to significant economic losses, so data room buildings have high requirements for the reliability and security of their infrastructure.

2. The water supply and drainage design of the data room includes water supply design, circulating cooling water system design, and drainage design. The water supply and drainage design content related to the computer room process varies with different projects. It depends on the different requirements of each project owner for the process of the computer room.

3. In addition to meeting the current national and local specifications, the water supply and drainage design of the data room also needs to meet the requirements of the computer room technology major.

Section 2 Water supply and drainage transformation of indirect evaporative cooling air conditioning equipment

1. Water requirements: reduce the outdoor air inlet temperature with the help of spray water evaporation, further use the natural cold source, and achieve the supply air temperature to meet the requirements of the computer room through circulating water spraying.

2. Schematic diagram of the water supply and drainage points of AHU indirect evaporative cooling energy-saving unit:

3. The water supply of the AHU indirect evaporative cooling energy-saving unit adopts a double-circuit ring water supply, and a valve is added to the air conditioning equipment. The drainage pipe is laid close to the ground and led to the nearest floor drain. The drainage riser is set separately and shall not be used with rainwater pipes. The drainage pipe should meet the requirements of Article 12.1.3 of the GB50174-2017 Data Center Design Code, and the relevant water supply and drainage pipes should not be arranged above the electronic information equipment. Humidifiers and floor drains should be set in the water-retaining cofferdam at the corresponding position, and the height of the water-retaining cofferdam is usually calculated according to 200mm.

Take the renovation of water supply and drainage pipelines in a data center as an example, as shown in the figure below:

Section 3 Water supply and drainage transformation of precision air conditioning units between air-cooled trains

1. The condensate drainage of the precision air conditioner between the columns adopts the method of merging and draining to the nearest floor drain, which can be used with the humidifier drainage floor drain. A separate riser is set at the humidifier location.

2. In the renovation of the computer room, the setting of floor drain is particularly important. Article 12.2.3 of the Data Center Design Code GB50174-2017 stipulates that when the main computer room and auxiliary area are equipped with floor drains, clean room special floor drains or self-closing floor drains should be used, and water sealing devices should be added under the floor drain without water sealing, and the water sealing depth should not be less than 50mm, and measures should be taken to prevent water seal damage and overflow.

The case is as follows:

Section 4 Analysis of key points of cooling tower water supply and drainage transformation

1. In order to consider the safety of water replenishment, the water replenishment pipe is arranged in a ring, and the water replenishment pipe connected to the cold tower is equipped with a valve.

2. The drainage of the cold tower is set up with a separate riser and discharged to the outdoor sewage pipe network, according to Article 3.11.18 of the GB50015-2019 "Design Standard for Building Water Supply and Drainage", the drainage of the circulating cooling water system should be discharged into the outdoor sewage pipe network, and shall not be directly discharged into the rainwater pipe.

3. The cooling tower of the data room operates all year round, and effective measures must be taken to prevent freezing for severe cold areas. 1) The cooling water pipe on the roof and the water supply pipe of the cooling tower are equipped with electric heat tracing and insulation, and the electric heating rod is installed in the cooling tower sink to ensure that the water in the sink will not freeze when the machine is stopped, and the electric heat tracing is supplied according to the fire load.

2) In severe cold areas, the cooling tower drainage should be directly discharged to the outdoor sewer through the indoor drainage pipe, and the roof drainage pipe should also be equipped with electric heat tracing and insulation.

The case is as follows:

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