Determining heat load capacities

The total airflow required by the equipment installed in each server rack must be compared with the total available supply from the MCS 5042, so it is not exceeded. The fans in the MCS 5042 are speed controlled to reduce the airflow in case the maximum cooling capacity is not demanded from the MCS 5042. Table 10 provides a few examples of the approximate fan speeds by the demanded cooling capacity from the MCS 5042.

Table 10: Approximate fan step at certain cooling capacity

Approximate cooling capacity

Approximate fan speed

 

 

~9 kW

40–45%

 

 

~16 kW

60–70%

 

 

~24 kW

75–85%

 

 

~32 kW

90–100%

 

 

>40 kW

100%

 

 

A minimum heat load is necessary for operating the MCS 5042 properly. This minimum depends on the water supply temperature as shown in Table 11.

Table 11: Minimum heat load at different water supply temperatures and server air intake temperature

 

Server air intake temperature

Water supply temperature

Minimum heat load

 

 

 

 

 

 

 

7ºC (45°F)

9 kW

 

 

 

 

 

 

20°C (68ºF)

10ºC (50°F)

7 kW

 

 

 

 

13ºC (55°F)

6 kW

 

 

 

 

 

 

 

 

 

16ºC (61°F)

6 kW

 

 

 

 

 

 

 

7–13°C (45–55°F)

16 kW

 

 

 

 

 

 

25°C (77ºF)

16ºC (61°F)

14 kW

 

 

 

 

 

 

 

18ºC (64°F)

10 kW

 

 

 

 

 

 

 

 

 

 

Note:

When the minimum heat load is not provided to the MCS 5042, it can cause unstable control of the temperatures and flow rates of the MCS 5042.

Consult with your HP representative for further information.

The charts in Figures 32 and 33 offer a guideline for determining the approximate amount of heat that can be removed from MCS 5042 based on 20°C (68°F) and 25° C (77°F) server intake air temperatures (in degrees Celsius) and flow rates (liters per minute (lpm) or in US gallons per minute (gpm)) being delivered to the unit.

Note:

The term “water” in the following charts refers to the coolant described in “Water quality requirements” section.

47

Page 47
Image 47
HP Modular Cooling System manual Approximate fan step at certain cooling capacity

Modular Cooling System specifications

The HP Modular Cooling System (MCS) is a state-of-the-art solution designed to efficiently manage the heat generated by high-density IT environments. As data centers face the ever-increasing demand for processing power, traditional cooling methods often fall short, leading to inefficiencies and raised energy costs. The HP MCS addresses this issue with a scalable, flexible design that optimizes cooling performance while minimizing energy consumption.

One of the main features of the HP Modular Cooling System is its modular architecture, which allows for easy expansion and customization based on the specific needs of a data center. This scalability means that as a facility grows or changes, the cooling system can be modified without the need for extensive renovations or replacements. The MCS can be installed in various configurations, further enhancing its versatility.

The technology behind the HP MCS includes advanced cooling methods such as direct evaporative cooling and chilled water cooling. Direct evaporative cooling utilizes the principles of evaporative heat exchange to cool air without excessive energy consumption, making it an eco-friendly choice. In contrast, chilled water cooling uses a network of pipes filled with chilled water to remove heat from the server environment efficiently. This combination allows the MCS to adapt to various heat loads and ambient conditions.

Another notable characteristic of the HP Modular Cooling System is its intelligent controls and sensors. These components continually monitor temperature and humidity levels within the data center, automatically adjusting cooling output to maintain optimal conditions. This proactive approach helps to prevent overheating, reduces energy usage, and ensures the longevity of IT equipment.

Energy efficiency is further enhanced through the MCS's integration with HP's monitoring and management software. This software analyzes cooling performance trends, providing actionable insights for facility managers, enabling them to make informed decisions regarding cooling strategies. Additionally, the system is designed with environmentally sustainable practices in mind, aligning with global initiatives to reduce carbon footprints and promote green technology.

The HP Modular Cooling System stands out for its combination of innovative technologies, flexibility, and a commitment to energy efficiency. As data centers continue to evolve, the MCS remains a crucial asset in the pursuit of optimized performance and sustainability, providing a reliable solution to meet the demanding cooling needs of modern IT infrastructure.