Design of Cooling and Air Flow System Using NDLC Method Based on TIA-942 Standards in Data Center at CV Media Smart Semarang

ABSTRACT


INTRODUCTION
Data center is a facility that is used to place computer systems and related components, such as telecommunications systems and data storage [1]. These facilities usually include power supplies, environmental controls (eg air conditioning, ventilation), fire suppression devices, and physical security devices [2]. Data center is expected to support the business processes of a company or organization, currently many companies or organizations have data centers to support the activities of the company or organization. Data center generally must be able to operate optimally, one of which is to maximize data center operating time. Therefore, one of the factors needed to maintain the device in the data center so that it can operate optimally is the cooling system and airflow. Water flow and cooling system aspects in the data center are very important, because the electronic devices in the data center room emit average heat, which if a data center does not have a good cooling system and air flow, the devices in the data center can experience overheating, overheating can reduce the ability of a device and if left unchecked can make a device damaged and operational data center can be disrupted, then the cooling system and air flow must be considered properly [2][3][4][5].
CV Media Smart is a company that is engaged as the process of procuring IT equipment at schools and offices. Due to a plan from CV Media Smart to design a data center to assist in the business process of procurement of IT tools and database leasing for private server online games. Based on this, this study aims to assist the design of CV Media Smart data center in the cooling  Design of Cooling and Air Flow System Using NDLC Method Based on TIA-942…(Septian Sony Hermawan) 35 system and air flow data center aspects. To get a data center design proposal that suits the needs of CV Media Smart, the TIA-942 standard is used. The TIA-942 standard has been approved by the Telecommunications Industry Association (TIA), the American National Standard Institute (ANSI), and more than 60 organizations in the telecommunications industry that have contributed to developing this standard include manufacturers, end-user consultants, and other organizations, [7,8] . There are 4 tiers in the design of data centers, each tier offers a different level of availability tailored to the needs of a data center. According to the TIA (Telecommunication Industry Association), the aspects of tier assessment in the data center can be grouped into 4 criteria, namely aspects of building architecture, electrical aspects, telecommunications aspects and mechanical aspects [9].
To support this research the method used is the Network Development Life Cycle (NDLC). NDLC is a method that depends on the development process such as business process design and infrastructure design. The reason this research uses the NDLC method is because the NDLC method depends on the development process. Based on this, this study aims to produce a proposed design of cooling systems and data center air flow according to the TIA-942 standard in order to provide data center recommendations for CV Media Smart.

LITERATURE REVIEW 2.1. Data center
Data center is known as a collection of servers or computer space [10]. From this understanding it can be concluded that Data Center is a room that contains a collection of servers that are used to store data, operate data, and manage data.

TIA-942
The Telecommunication Industry Association is an American national standard that sets minimum requirements for telecommunications infrastructure of data centers and computer rooms. The topology prepared in this standard is intended to be applicable in all types of data centers. TIA-942 discusses procedures regarding network architecture, electrical design, file storage, backup and archiving, system redundancy, network access control and security, database management, web hosting, application hosting, and content distribution, environmental control, protection againts physical hazards (fire , flood, windstorm), and power management [10][11].

RESEARCH METHOD
Research Systematics is an explanation of things done during the research. This study uses the NDLC method with limitations at the analysis and design stages. Systematics of this research was made in the form of a flowchart, to make it easier to see the stages carried out during the study.

ANALYSIS AND PROPOSED APPROACH 4.1. Existing condiition
At this stage, comparing existing conditions with the criteria that must be met from the TIA-942 tier 1 standard.

Chilled Water System
Required Not using single path cilled water system and chilled water pump without redudant There is no watercooled chiller without redudant Not meet tier 1 criteria

Required
There is no watercooled chiller without redudant

Proposed Data Center Design
In the existing conditions there is no floor plan or design for data center placement, it is necessary to design a data center in accordance with TIA-942 tier 1 standards.

Proposed Cooling System
To apply a cooling system in a data center room a method called Row Oriented Cooling is used. Row oriented cooling is a method that allows hot air and cold air to have separate grooves, because all sides that emit heat will be confronted and emit heat together, then the other side will be given cold air from the HVAC so that cold air enters and pushes hot air out of a device that emits heat. To be able to support the row oriented cooling method, a device that can emit cold air and absorb hot air must be used, therefore a cooler called HVAC is used, because this HVAC can remove the dinign air through the raised floor and absorb the hot air through the top, so there will be no meeting of cold and hot air.  Figure 3 the placement of the server rack and the HVAC device is intended so that the hot air generated by the device placed on the server rack, can be immediately absorbed by the HVAC device. The part that produces hot air is the back of the server rack, while the part that is flowed with cold air from the HVAC is the front of the server rack. In order for the cool air to be flowed from the HVAC to reach the server rack, a perforated tile is needed at the front of the server rack.  Figure 4 shows how the cold air generated by the HVAC device is flowed to the server rack through the bottom of the raised floor, which then air will come out from the bottom of the raised floor through perforated tiles that have been installed on the front of the server rack. And the hot air generated by the device installed on the server rack, will be directly sucked up by the HVAC device.  Figure 5 it can be seen that the area that produces heat is on the front and back of the server rack with temperatures between 25 to 28 ℃.

Perforated Tiles and Raised Floor Design
According to Figure 6, raised floors are installed to fill the room, except in front of the server rack because a perforated floor will be installed. There are two types of raised floor panels, namely HPL (High Pressure Laminate) and Bare, the type that is suitable for use is the type of HPL, because raised foor of this type has been coated with anti-static and scratch-resistant material. While the BARE type does not yet have an anti-static and scratch-resistant coating, and needs to be finished finishing by adding carpet tiles that can disturb the room temperature later.

CONCLUSION
Based on this research, it can be concluded to design a cooling and air flow system design in CV Media Smart data center as follows. At the stage of identification of room conditions based on the TIA-942 standard, available rooms do not meet the data center requirements. Because the data center to be created has a small scale, the use of tier 1 is sufficient to meet the needs of the data center. At the design stage, the design provided is based on the TIA-942 tier 1 standard, and the cooling device uses HVAC. The proposed data center room uses raised floors and perforated tiles.