Cold/Hot Pool Solutions for DC provides solutions to address increasing heat loads from servers using cold aisle/hot aisle containment strategies. It discusses challenges with traditional cooling methods and how cold aisle containment isolates cold air to better cool servers without mixing with hot air. Hot aisle containment similarly isolates hot air exhaust. These solutions reduce cooling costs by lowering temperature needs and energy consumption compared to traditional methods. Intelligent airflow control methods are also proposed to more efficiently cool server racks based on varying load conditions.

1. Cold/Hot Pool Solutions for DC
(Cold/Hot Aisle Containment)

2. Heat radiation increases
How to solve the problem of equipments' heat radiation for the coming
era of large blade server and cloud computing?
2000
21, 2U Servers
2kw heat
amount
2002
42, 1U Servers
6kw heat amount
2006
6 Blade Centers
24kw heat amount
2016 ?

3. Challenges faced by traditional IT room--hot hot hot
1,Short-distance recycling causes insufficient cooling
2,Long-distance blowing causes insufficient incoming air for racks
3,Long-distance of air returning causes mixing of cold and hot air currents, to reduce
efficiency of CRAC

4. Challenged faced by traditional IT rooms: hot hot hot
In traditional IT rooms: cold current isn't well isolated from hot atmosphere,
therefore enough cold current is needed, after mixing with hot atmosphere, to
cool down IT equipments,
whereas colder current means higher power consumption
ASHRAE(American Society of Heating, Refrigerating and Air-Conditioning
Engineers) tells: one more higher degree of flowing current can save 4% of
refregeration consumption
Tradtional model of upside flow Traditional model of beneath flow

5. Solutions of cold pool (cold aisle containment)
Cold pool adopted to isolate CRAC's blowing air, to avoid mixture of blowing air and
enviroment air / emission air of servers, to supply more effective cooling air to support
more density of equipment installation. Meanwhile much reduce quantity of CRAC and
power consumption, hence to achieve cost reduction and energy saving / emssion
reduction

8. Solution of enclosed-type hot passage(hot aisle
containment)
Similar manner, hot pool adopted to isolate returning air of CRAC, to avoid the mixture
of the returning air and blowing air for servers

9. Traditional way of air blowing VS cold pool
Total IT load=1200KW
100 racks: 12KW/rack
Total air current=138,000 CFM
Could raise tempreture of the blowing air by 13 ,℃
much reduce power consumption

10. Stimulated diagram of refrigeration effect
comparison in IT room
Avarage tempreture of IT rooms can be made around 23.6 , after setup of℃
cold pool system

11. Intelligent airflow control--for more
efficiency in rack cooling
• Direct rack air conditioning goes in a new
direction---Horizontal
• To deal with: fluctuating server rack loads, space
restrictions, lack of a raised floor,existing server
technology, etc.
• Ⅰ, , ,Ⅱ Ⅲ Ⅳ

12. Ⅰ,Horizontal Air Conduction:

13. Ⅱ,Cold air reaches the rack via the shortest route

14. Ⅲ

15. Ⅳ

16. Shanghai Z&G Intelligent Technology Co., Ltd
• Henry Soong : 86 152 2157 6493
• www.zgitech.com
• henry.soong@zgitech.com
• Tel: 86-21-5438 8778; Fax: 86-21-5428 2153