HP 240A is an innovative product that combines power distribution, Adaptive Cooling technology, and Environmental Control Suite (ECS). HP 240A can be deployed up to 88% faster, at one quarter of the CAPEX cost, and in a tenth of the space required by a traditional facility. It accepts a 380 – 415V three-phase Wye AC input, commonly available worldwide. The power architecture minimizes connections, eliminates transformers, and achieves a 50% reduction in copper compared to 208V three-phase distribution. 240-VAC operation yields the best efficiency.
HP 240A is an innovative product that combines power distribution, Adaptive Cooling technology, and Environmental Control Suite (ECS). HP 240A can be deployed up to 88% faster, at one quarter of the CAPEX cost, and in a tenth of the space required by a traditional facility. It accepts a 380 – 415V three-phase Wye AC input, commonly available worldwide. The power architecture minimizes connections, eliminates transformers, and achieves a 50% reduction in copper compared to 208V three-phase distribution. 240-VAC operation yields the best efficiency.
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Introduction
Updating a traditional data center or building a completely new one requires substantial capital expense (CAPEX) and
months to a year or more of planning and construction. Even when finished, the facility may require high operational
expense (OPEX) and may not achieve adequate power usage effectiveness (PUE) rating. A PUE of 2.0 to 2.4 is considered
very good for traditional data centers but is difficult to achieve.
That’s why we’ve developed the HP Performance Optimized Datacenter (POD) 240a. The HP POD 240a is a complete data
facility that can be operational in a matter of weeks after placing your order.
This paper describes the HP POD 240a and explains how it can achieve a PUE as low as a near-perfect 1.05 while meeting
your performance and serviceability goals.
HP POD 240a
The pace of change in IT equipment (ITE) technology is quickening to the point that it’s difficult for existing data facilities
to keep up. Traditional data center design is based on estimates of total ITE inventory, ITE power consumption, and the
amount of cooling required. Data center facilities administrators commonly populate one-half to two-thirds of each
rack, leaving the extra space for ITE expansion. However, recent IT technology trends—high-density server systems,
virtual machines, and converged networks—make it difficult and costly for facilities to adapt.
The HP Performance Optimized Datacenter 240a is a modular, scalable solution for data center deployment and
expandability. The HP POD 240a (Figure 1) provides an intelligent, energy-aware environment that optimizes compute
space to maximize facility capacity and reduce energy costs.
Figure 1: This illustration shows a complete HP POD 240a.
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The HP POD 240a represents a new approach to data center. Combining IT, cooling, and power infrastructures in a self-
contained modular unit minimizes the data center footprint. The POD 240a packs the equivalent of a 10,000 square foot
traditional facility into an area only 24 feet wide and 45 feet long. This 90% reduction of space yields several immediate
benefits:
• Up to 75% in CAPEX savings over traditional facilities
• No disruption of existing facility and operation
• Environmentally friendly solution that substantially reduces the amount of concrete required and significantly lowers
the carbon footprint
• Enhanced serviceability by deploying more IT equipment in a smaller area
Figure 2 is a cross-sectional view of the ITE area within an HP POD 240a module. The module contains two rows of full-
depth, 50U, 19-inch ITE racks with a 39.5-inch cold aisle in front of each row and a common 8-foot wide hot aisle. Unlike
many traditional facilities in which air exhausted from the equipment mixes freely with cold air, the HP POD 240a uses
isolation baffles to separate cold and hot air flow. This layout gives you the full ITE serviceability of a traditional data
facility combined with the highly efficient closed-loop cooling of a customized module.
Figure 2: Shown below is the cross-section of an un-configured HP POD 240a ITE area.
50U 19-in ITE racks
Primary Isolation Common Isolation Secondary
cold aisle baffle hot aisle baffle cold aisle
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The architecture allows shipping the HP POD 240a fully configured with 44 racks of pre-installed IT equipment
(Figure 3). When fully populated with HP ProLiant SL170 servers (two servers per rack U), the HP POD 240a can
accommodate up to 4,400 servers. Higher server densities may be possible with HP BladeSystem solutions. We can pre-
install and test the complete ITE configuration to greatly reduce deployment time and give you quicker ROI.
Figure 3: Shown below are two views of a configured HP POD 240a.
The HP POD 240a provides optimum performance when populated with HP ProLiant server and storage products
supporting management solutions such as HP Insight Control (discussed later). However, the industry-standard racks in
the module can accommodate components of your choosing.
Power distribution
The HP POD 240a accepts a 380 – 415V three-phase Wye AC input, commonly available worldwide. Depending on
location, the HP POD 240a may require additional power conversion components to connect to the local utility power. In
North America, a standard 480V Delta-to-415V Wye step-down transformer may be required to interface the HP POD
240a with utility power. By distributing three-phase power closer to the ITE load, the HP POD 240a power architecture
minimizes connections and eliminates numerous transformers that take up space and add heat.
Using a 415V input and distributing 240V single-phase power to the IT load achieves a 50% reduction in copper
compared to 208V three-phase distribution. HP ProLiant solutions use universal, voltage-sensing power supplies that
can operate within a 110- to 240-VAC range, but 240-VAC operation typically yields the best efficiency.
Power redundancy is a key capability of the HP POD 240a. Power enters the HP POD 240a through two sets of power
cabinets at one end of the module (one set shown in Figure 4). The HP POD 240a allows you to tailor your power needs
and supports 2N power redundancy such as independent, active-active, or A-Side and B-Side feeds for all components.
A: Common hot aisle B: Cold aisle (one of two)
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Figure 4: This illustration shows one of two power cabinet sets.
Note: Actual power components may vary depending on configuration.
IT power within the HP POD 240a routes through an expandable busway system (Figure 5) that allows flexible, easy, and
safe circuit additions without requiring a maintenance outage. For rack-level power distribution, manageable outlets (an
option) allow you to set the amperage level from a remote terminal. The HP POD 240a can support a rack average of up
to 44 kW (69 kW peak)
Figure 5: This illustration shows a rack-level power interface in the expandable busway system.
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HP Adaptive Cooling Technology
HP Adaptive Cooling Technology of the HP POD 240a combines a traditional cold aisle/hot aisle layout with an adanced
control system that intelligently cools IT equipment—without the need of a chiller plant. Adaptive Cooling Technology
uses a specially designed HVAC system and several operating modes to use ambient air as much as possible to achieve
high cooling efficency.
Using policy controls that you preset, HP Adaptive Cooling Technology performs the following functions:
• Defines environmental operation envelope
• Controls the evacuation of hot aisle air into the environment
• Monitors air handler functionality and reports on environmental conditions and system operation
HP Adaptive Cooling Technology components identified in Figure 6 maintain the correct relative humidity and
temperature levels within the cold aisle.
Figure 6: The illustration and table below show HP POD 240a Adaptive Cooling Technology components.
Item Description
1 Outside air input louvers draw outside air into the system.
2 Hot aisle canopy expels exhaust air into the environment.
3 Direct eXpansion (DX) units with electronically-controlled fans mix re-circulated IT exhaust air
with outside air to maintain the cold aisle set-point temperature.
4 HVAC service area allows access to the system for filter maintenance.
5 Hot aisle module collects IT equipment exhaust air for expelling or cooling and re-circulating.
6 Humidifier and fire suppression system for air conditioning and safety.
4
2
3
5
1
6
7
Adaptive Cooling Technology uses three operating modes:
• In free-air mode, the module uses outside air for equipment cooling.
• In DX assist mode, DX units reclaim exhaust (warm) air to mix and re-circulate with outside air.
• In full DX mode, DX units provide full cooling by re-circulating and dehumidifying all inside air.
Figure 7 shows the airflow of each operating mode and the PUE that each can achieve.
Figure 7: This illustration shows airflow for the HP POD 240a.
Adaptive Cooling Technology intelligently adjusts to the most efficient operating mode for maintaining the cooling
parameters you set. A typical daily routine would be for the system to use free-air mode in the morning when it is cooler
outside, and then automatically switch to DX assist mode as the day gets warmer. In the afternoon when the outside
temperature is hottest, the system would switch to Full DX mode. When the weather gets cooler in the evening, Adaptive
Cooling reverses the process.
While you can get the best PUE with free-air mode, even full DX mode can yield a PUE of 1.3. That is far better than the
2.0 to 2.4 PUE that traditional facilities try to achieve.
Free-air mode air flow
DX assist mode air flow
Full DX mode air flow
B
A
A
A
C
C
B
B
C
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HP Environmental Control Suite
The HP Environmental Control Suite (ECS) is a comprehensive management package providing complete control and
monitoring of the HP POD 240a—either locally (at the POD) or remotely.
The ECS has these key capabilities:
• Power, smoke, alarm, and fire suppression monitoring
• User-definable alarm levels
• Policy-based Adapative Cooling control:
– User-selectable cooling parameters to ASHRAE
1
– User-defined set points for switching cooling modes based on outside environmental conditions
-recommended, ASHRAE-allowable, or HP-allowable
• Integrates with HP management systems through MODBUS serial or TCP/IP internet communications protocols
• HP Insight Control for managing HP ProLiant server deployment, health management, and power consumption
Conclusion
Efficient power distribution, Adaptive Cooling technology, and ECS make the HP POD 240a the world’s most efficient
data center. The HP POD can be deployed up to 88% faster (for quicker ROI), at one quarter the CAPEX cost, and in a
tenth of the space required by a traditional facility. Once installed, the HP POD 240a continues to reduce costs by
operating with up to 95% power efficiency. The savings in TCO for the HP POD 240a represents a substantial amount
better spent toward other areas of your company’s innovation.
For more information
Visit the URLs listed below if you need additional information.
Resource description Web address
HP POD 240a information
www.hp.com/go/pod240a
HP server technology information library
www.hp.com/servers/technology
HP white paper: “Cooling Technologies for IT
Equipment”
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02507
744/c02507744.pdf
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American Society of Heating, Refrigerating, and Air conditioning Engineers
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© Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only
warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein
should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.
TC1109761, Created June 2012
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HP 240A is an innovative product that combines power distribution, Adaptive Cooling technology, and Environmental Control Suite (ECS). HP 240A can be deployed up to 88% faster, at one quarter of the CAPEX cost, and in a tenth of the space required by a traditional facility. It accepts a 380 – 415V three-phase Wye AC input, commonly available worldwide. The power architecture minimizes connections, eliminates transformers, and achieves a 50% reduction in copper compared to 208V three-phase distribution. 240-VAC operation yields the best efficiency.
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