When you are a data center manager or consulting-specifying engineer, very few things are more unsettling than the unexpected. We hope this list helps IT and engineering professionals better anticipate these issues and prepares them with the appropriate technologies, solutions, and best practices.
Generally speaking we have 10 advice for your data center:
High-density predictions finally come true
After rapid growth early in the century, projections of double-digit rack densities have been slow to come to fruition. Average densities hovered between 6.0 and 7.4 kW per rack from 2006 to 2009, but the most recent Data Center Users’ Group (DCUG) survey predicted average rack densities will reach 12.0 kW within three years. That puts a premium on adequate UPS capacity and power distribution as well as cooling to handle the corresponding heat output.
Servers may be replaced three times before UPS or cooling systems renewal
Server refreshes happen approximately every three years. Cooling and UPS systems are expected to last much longer—sometimes decades. That means the infrastructure that organizations invest in today must be able to support—or, more accurately, scale to support—servers that may be two, three, or even four generations removed from today’s models. Modular solutions can scale to meet both short- and long-term requirements. Engineers will need to consider and make the necessary adjustments and allocations regarding day-to-day servicing and maintenance of the longer lasting power and cooling equipment.
Down time is expensive
We don't want it. The most common causes of downtime are UPS battery failure and exceeding UPS capacity. Avoid those problems by investing in the right UPS—adequately sized to support the load—and proactively monitoring and maintaining batteries. This gives engineers an opportunity to share best practices with clients and recommend battery monitoring solutions and high-end availability architecture. They can use the cost of downtime information to support recommendations and ensure clients understand how they can implement design changes and modifications that will improve availability.
Energy rebates are available for energy efficiency upgrades
Many utility providers offer energy rebates and incentives for data centers that make energy efficiency improvements. This presents an opportunity for engineers to propose high-efficiency designs and help clients receive reimbursements for upgrading legacy equipment with high-efficiency power and cooling systems. Clients may also look to engineers to assist with the often lengthy application process. Once the reimbursement has been approved, utilities will request information on actual project costs and may require follow-up measurement and verification to determine actual energy savings.
Industry codes are playing a larger role in cooling strategy
In the 2010 edition of ASHRAE 90.1: Energy Standard for Buildings Except Low-Rise Residential Buildings, the SCOP (seasonal coefficient of performance) rating was expanded to include data centers. Codes are becoming more numerous and impacting data center cooling strategies and technology developments. It is important that engineers keep abreast of new codes and regulations and the latest technologies that enable compliance.
Monitoring can be a mess
IT managers have more visibility into their data centers than ever before, but accessing and making sense of the data that comes with that visibility can be a daunting task. According to an Emerson Network Power survey of data center professionals, data center managers use, on average, at least four different software platforms to manage their physical infrastructure. Of those surveyed, 41% say they produce three or more reports for their supervisors every month, and 34% say it takes three hours or more to prepare those reports. The solution? Move toward a single monitoring and management platform that can consolidate that information and proactively manage the infrastructure to improve energy and operational efficiency, and even availability.
IT Person may be in charge of the building’s HVAC system
The gap between IT and facilities is shrinking. Traditionally, IT and data center managers have had to work through facilities when they needed more power or cooling to support increasing IT needs. That process is being streamlined. For engineers, it is important that they now incorporate all of these players into the design process. Gone are the days when the engineer had to work with only one or two individuals, usually from the facility side. Now it is a complex ecosystem comprised of IT, operations, facilities, and sometimes procurement.
That patchwork data center needs to be a quilt
In the past, data center managers and engineers freely mixed and matched components from various vendors because those systems worked together only tangentially. However, the advent of increasingly intelligent, dynamic infrastructure technologies and monitoring and management systems has increased the amount of actionable data across the data center, delivering real-time modeling capabilities that enable significant operational efficiency. IT and infrastructure systems still can work independently, but to truly leverage the full extent of their capabilities, integration is imperative.
Data center on demand is a reality
The days of lengthy design, order and deployment delays are over. Today there are modular, integrated, rapidly deployable data center solutions for any space. Integrated, virtually plug-and-play solutions that include rack, server, and power and cooling can be installed easily in a closet or conference room. On the larger end, containerized data centers can be used to quickly establish a network or to add capacity to an existing data center.
IT loads vary a lot
Many industries see extreme peaks and valleys in their network usage. Financial institutions, for example, may see heavy use during traditional business hours and virtually nothing overnight. Holiday shopping and tax seasons also can create unusual spikes in IT activity. Businesses depending on their IT systems during these times need to have the capacity to handle those peaks but often operate inefficiently during the valleys. A scalable infrastructure with intelligent controls can adjust to those highs and lows to ensure efficient operation.
About SMA
Strategic Media Asia (SMA) is one of the CPD Course Providers of the Chartered Institution of Building Services Engineers (CIBSE).
SMA, a critical infrastructure training and event organizer based in Hong Kong, provides an interactive environment and opportunities for members of IDC industry and engineers to exchange professional views and experience on critical infrastructure and E&M facilities.
For details of other data center courses and seminars, please visit our website at http://www.stmedia-asia.com/trainings.html.
Best Practices for Critical Facilities Design, Efficiency and Operations
Showing posts with label ASHRAE. Show all posts
Showing posts with label ASHRAE. Show all posts
Wednesday, October 15, 2014
10 Recommendations for your Data Center
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Monday, October 28, 2013
Now for Sale - Training Manual of "HVAC Design and Cooling Specialist for Data Center Efficiency"
HVAC DESIGN & COOLING SPECIALIST FOR DATA CENTER EFFICIENCY
This is a training manual developed by a team of experienced Chartered Engineers (CEng). For data center operators and facilities managers, we help you to understand key challenges and consider different factors, from design, testing, commissioning, sustainability and efficiency, of HVAC (Heating, Ventilation, and Air Conditioning) system for data centers.
In addition, the manual details the guidelines of data centers’ cooling criteria, HVAC load development, air distribution, liquid cooling, contamination, availability and redundancy, Computer Fluid Dynamic (CFD) model, energy efficiency, etc., from general theory to technical implementation.
To predict a data center’s power and heat loads over the years ahead is the hardest thing for data center owners. It introduces datacom power trends and cooling applications showing expected growth in power density for different types of computing equipment out to 2020.
Total Number of Page: 106
Total Number of Slide Contained: 204
Size: 210mm x 300mm x 10mm
Language: English
Color: Black & White
CD / Soft Copy: Not Included
THE MANUAL CONTENT
Datacom Equipment Power Trends and Cooling Applications
(a) load trends and their applications
(b) air cooling and liquid cooling of computer equipment
Design Consideration
(a) design criteria and HVAC load
(b) computer room cooling and air distribution
(c) liquid cooling
(d) availability and redundancy
(e) integration with other MEP system
(f) controls and computer fluid dynamics
Testing and Commissioning
(a) air cleanliness test, heat load test
(b) factory acceptance test and site acceptance test
(c) integrated performance test (IST)
Sustainable Design
(a) combined heat power plant (CHP)
(b) solar, geothermal and evaporative cooling method
(c) air side economizers
(d) desiccant unit
Energy Efficiency
(a) power usage effectiveness (PUE)
(b) chilled water plant optimization
(c) water side and air side equipment
(d) part load operation
(e) controls and energy management
(f) LEED certified data center
(g) building energy code
ORDER METHOD
Please contact us at info@stmedia-asia.com
The manual is also available on eBay: http://www.ebay.com/usr/st-media
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Tuesday, May 14, 2013
How to Upgrade your Data Center and Critical Facilities?
An aging data center may no longer be able to meet the power, cooling and structural demands of advancing technologies, but few businesses have the time or the capital to build new facilities.
Fortunately, organizations can extend the working life of their data center by renovating the facility by making changes that cost little to nothing. Data center upgrades allow a business to adopt new standards and improve existing infrastructures to introduce new technologies with better performance and more efficiency.
There are several data center design changes that can extend the life of your facilities and data center
(1) Elevate your data center temperature
The data center's working temperature has long been a subject of myth and legend, but research and initiatives from industry organizations such as the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) have found that data centers don't need to be cooled like meat lockers. Modern servers and other computing equipment can operate reliably at elevated temperatures.
A 2008 ASHRAE document recommended a temperature range from 65 to 80 degrees Fahrenheit for Class 1 data center equipment. Recommendations in 2011 broadened the allowable temperature range from 59 to 90 degrees Fahrenheit for enterprise-class servers and 41 to 113 degrees Fahrenheit for appropriately designed servers and other equipment.
In addition, the extended temperature range also makes it possible to adopt alternative or supplemental cooling schemes (at least during certain parts of the day), such as free air or air/water economizers -- cooling technologies that might not have even been considered when your data center was first built.
(2) Upgrade servers and systems for better consolidation and efficiency
Servers consume the majority of energy in a data center -- primarily in the processors and memory components. Organizations can gain significant energy efficiency by upgrading servers to more efficient models during normal technology refresh cycles where capital is already budgeted. The newer server may also provide greater amounts of memory, allowing a virtualized server to provide much higher levels of consolidation than earlier servers.
This means the same amount of computing work can be done with far fewer servers, saving equipment capital and generating only a fraction of the heat for a data center's cooling system to contend with.
(3) Change the system layout and rack layout for power and cooling efficiency
It is a matter of Hot Aisle & Cold Aisle.
Suppose you had a traditional data center where a large computer room air-conditioning unit (CRAC) cooled the room. Now imagine that a server refresh and consolidation project slashed the number of servers by 75%. With just a quarter of the original server count in this example, it may be possible to rearrange the remaining servers in far fewer racks and use containment to enclose the remaining servers. This limits the air volume that must be cooled, significantly reducing the amount of mechanical cooling needed and allowing for alternative cooling technologies.
In other cases, under-floor cooling may be more effective by reworking the electrical cabling, network cabling and water lines that cross below the floor.
A poorly designed and haphazard layout can obstruct cooling air distribution, making more work for the mechanical cooling unit. In addition, any water distribution increases the potential for damage to electrical and network wiring, so many organizations opt to route electrical and network wiring overhead -- leaving water lines under-floor -- and may even upgrade network cabling to allow for future bandwidth improvements.
Don't overlook the rack space itself. For example, fully populating racks can concentrate more equipment in less space, making any containment -- and associated cooling -- more effective. And some racks may not be deep enough to accommodate new generations of computing equipment. This can lead to wiring congestion and airflow problems.
(4) Consider supplemental or alternative cooling schemes
Mechanical heating, ventilation and air conditioning (HVAC) systems are a staple of the modern data center, but they are also costly, energy-hungry and a potential single-point of failure in data center availability. If the cooling system fails, a data center can overheat in a matter of minutes.
Data center renovations often focus on ways to supplement or replace traditional mechanical cooling with alternative equipment or methods that are enabled by higher operating temperatures, better containment and less equipment.
Popular alternative cooling approaches include chilled water heat exchangers (water economizers), evaporation cooling and even free air cooling (air economizers).
These methods, however, require affordable environmental resources that are suited to the task and available for much of the day. For example, using cold lake water to drive a water economizer requires a nearby lake. In many cases, these alternative methods are added to supplement traditional HVAC, lowering run times and power needs.
Organizations that must continue using HVAC are taking a fresh look at the cooling system's capacity and efficiency. The potential problem is that a large, aging HVAC system runs even less efficiently if it is used infrequently; easing the cooling load on your legacy HVAC system might actually cost more and be harder on the mechanical system.
This means that raising operating temperatures and reducing the amount of computing equipment may justify a smaller cooling system.
(5) Consider availability and reliability issues in power distribution
Upgrading the uninterrupted power supply (UPS) systems to a newer model can improve UPS energy efficiency and provide more intelligent power monitoring/measurement capabilities that complement a data center infrastructure management scheme.
When a UPS is replaced, it is hopefully with a higher efficiency system, and may also become a redundant [N+1] configuration and possibly even a modular or incremental capacity solution. Power equipment upgrades may spawn broader wiring and distribution upgrades in older buildings.
It is also a common practice to upgrade in-rack power distribution units (PDUs) to add intelligent power management, along with rack temperature and humidity monitoring. With UPS and PDU upgrades together, an organization can gather energy use data and make more informed decisions about power costs in the data center.
(6) Finally, consider the availability of data center power
Organizations with aging, unreliable or overtaxed power grids may consider local co-generation options to ensure uninterrupted power. Traditional diesel generators are quickly giving way to more efficient and environmentally friendly alternatives, including solid oxide fuel cells such as Bloom Energy Servers or solar arrays to produce some amount of local electricity. If it's not possible to install local co-generation on-site, it may be possible to contract with regional co-generation providers for supplemental electricity.
About The Blogger
Strategic Media Asia (SMA, www.stmedia-asia.com) is a leading technical training and event organizer for corporations specialized in data center design & build, E&M facilities, telecom, ICT, finance and colocation. Currently, SMA delivers a series of data center trainings and qualification programs in Hong Kong, Taiwan and Macau.
All these events / training seminars are designed to support the leadership needs of senior executives (Chief Information Officers, IT Directors / Managers, Facilities Managers, company decision makers, etc.) and to provide useful and applicable knowledge.
For detail, please visit SMA's Technical Training Seminars & Data Center Qualification Programs.
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Monday, July 23, 2012
Key Areas to Examine for Data Center Efficiency
Are you struggling on where to start your energy efficiency efforts? Look to these
four key areas for improvements.
Power Usage Effectiveness (PUE) is the most popular industry metric for measuring the energy efficiency of data centers. Today, there appears to be an arms race for the lowest PUE. Even if you aren’t one of the select few with the operational flexibility to participate, you can measure your PUE and work to improve efficiency relative to your own data center site. The industry group, The Green Grid, has many resources available on PUE.
You may also consider to take some data center training / certification - Energy and Cost Management for Data Center.
ASHRAE’s latest version of TC 9.9 drastically expanded the recommended and allowable temperature and humidity ranges with the approval of the major server manufacturers. It is estimated that an energy savings of 2-4% can be realized for each degree Celsius the temperature is raised in a data center. It seems raising the temperature is low hanging fruit, but I have seen very few do it to date.
Another undisputed, easy and inexpensive energy saver is hot or cold aisle containment. Preventing the mixing of cold and hot air results in a higher return air temperature that yields an increased efficiency of the cooling system. Many systems exist ranging from hard containment systems to simple refrigerator curtains that you might see in a meat locker. Have a limited budget? Hot or cold aisle containment provides a compelling financial argument for adoption.
Free cooling is now a critical consideration–with either air-side or water-side economization. The new temperature and humidity ranges offered by TC 9.9 make free cooling feasible for a large part of the year in any location, and when designing a new data center or expanding an existing facility.
Liquid cooling has been talked about a great deal of late, with liquids being far more efficient at expelling heat than air. The approach requires some modification of the server so that it can be submerged in the liquid, but studies have shown positive results.
Evaporative cooling is another energy efficient technique, especially applicable in dry climates. However, evaporative cooling often sparks a debate over the use of additional water, especially in water-constrained areas.
Water is a topic that is gaining increased attention and will continue to do so in the future. I once heard a “futurist” say that “water is the new oil.” In evaluating evaporative and other cooling techniques, many (myself included) have made the mistake of evaluating only the amount of water used in the respective cooling systems.
In order to determine the complete hydro-footprint of a system, you must also look at energy usage and how much water is used in the production of that energy. The National Renewable Energy Lab (NREL) published a study that analyzed how much water is used in the production of power per kilowatt-hour on a state-by-state basis. While not perfect, it provides a basis for analysis from an authoritative source. After taking the amount of water used in the production of energy into account in a particular geography, evaporative cooling can have a smaller hydro-footprint (use less total water) than a chilled water system due to the amount of energy saved.
There have been a few projects of late that use either sea water or ground water for cooling, which is very efficient as it effectively eliminates the need for much of the cooling equipment. A site in central Nebraska is pursuing this tactic by using irrigation wells with a volume of 1,000 GPM at 52⁰F as the source of groundwater for cooling and re-injecting the water back into the aquifer. This is not only very energy efficient, but uses little to no water for cooling, saving on both capital expenditures (CAPEX) and operating expenditures (OPEX) through the elimination of much of the cooling equipment. The net impact addresses both the energy and water efficiency of the equation for a very energy efficient, and therefore sustainable, cooling solution.
Major efficiency gains have been made in recent years in electrical equipment that can improve your data centers’ PUE. There are multiple manufacturers of UPS’ that are reaching efficiencies of 96-98 percent at less than 50 percent load. This is important if you utilize A and B feeds to your equipment for redundancy.
Another trend is for the UPS to operate in a by-pass mode, which eliminates the losses through the batteries. Many are not yet comfortable with this mode of operation, but it is another efficiency gain to consider in optimizing performance. Higher voltage and DC power are also evolving trends that provide efficiency gains that bear mentioning.
Whether designing a new, energy efficient data center or upgrading your existing facility, there are many incentives available to help defray the cost and improve your ROI.
Power companies are commonly providing incentives based upon your performance compared to a baseline building or a baseline piece of equipment. Plan to include the power company as early in the design phase as possible, to maximize the financial benefits. Some require approval of the incentive prior ordering the equipment.
There are additional considerations beyond those mentioned above in optimizing your mission critical facility’s efficiency.
Regardless of the selected energy efficiency measures in your new or existing data center, make sure you measure your initial or existing condition so you have a baseline. After your improvements are made, measure again to determine your new condition and your ROI. In the case of a new data center, perform a total cost of ownership (TCO) analysis to guide your decisions. You should continue to monitor your efficiency and make improvements to improve your PUE relative to your initial condition. As a reminder, measuring your outcomes against those in the industry under different operating conditions may not provide an apples-to-apples comparison.
- Cooling: Typically the lowest hanging fruit.
- Water: Don’t overlook the use of water, due to its
scarcity in certain areas. Water is related to energy as well.
- Electrical Design: Recent engineering innovations offer new
efficient options.
- Incentives: Help offset improvement or development costs of energy efficiency.
Measuring Efficiency
Power Usage Effectiveness (PUE) is the most popular industry metric for measuring the energy efficiency of data centers. Today, there appears to be an arms race for the lowest PUE. Even if you aren’t one of the select few with the operational flexibility to participate, you can measure your PUE and work to improve efficiency relative to your own data center site. The industry group, The Green Grid, has many resources available on PUE.
You may also consider to take some data center training / certification - Energy and Cost Management for Data Center.
Green Cooling Techniques
ASHRAE’s latest version of TC 9.9 drastically expanded the recommended and allowable temperature and humidity ranges with the approval of the major server manufacturers. It is estimated that an energy savings of 2-4% can be realized for each degree Celsius the temperature is raised in a data center. It seems raising the temperature is low hanging fruit, but I have seen very few do it to date.
Another undisputed, easy and inexpensive energy saver is hot or cold aisle containment. Preventing the mixing of cold and hot air results in a higher return air temperature that yields an increased efficiency of the cooling system. Many systems exist ranging from hard containment systems to simple refrigerator curtains that you might see in a meat locker. Have a limited budget? Hot or cold aisle containment provides a compelling financial argument for adoption.
Free cooling is now a critical consideration–with either air-side or water-side economization. The new temperature and humidity ranges offered by TC 9.9 make free cooling feasible for a large part of the year in any location, and when designing a new data center or expanding an existing facility.
Liquid cooling has been talked about a great deal of late, with liquids being far more efficient at expelling heat than air. The approach requires some modification of the server so that it can be submerged in the liquid, but studies have shown positive results.
Evaporative cooling is another energy efficient technique, especially applicable in dry climates. However, evaporative cooling often sparks a debate over the use of additional water, especially in water-constrained areas.
Water Efficiency
Water is a topic that is gaining increased attention and will continue to do so in the future. I once heard a “futurist” say that “water is the new oil.” In evaluating evaporative and other cooling techniques, many (myself included) have made the mistake of evaluating only the amount of water used in the respective cooling systems.
In order to determine the complete hydro-footprint of a system, you must also look at energy usage and how much water is used in the production of that energy. The National Renewable Energy Lab (NREL) published a study that analyzed how much water is used in the production of power per kilowatt-hour on a state-by-state basis. While not perfect, it provides a basis for analysis from an authoritative source. After taking the amount of water used in the production of energy into account in a particular geography, evaporative cooling can have a smaller hydro-footprint (use less total water) than a chilled water system due to the amount of energy saved.
There have been a few projects of late that use either sea water or ground water for cooling, which is very efficient as it effectively eliminates the need for much of the cooling equipment. A site in central Nebraska is pursuing this tactic by using irrigation wells with a volume of 1,000 GPM at 52⁰F as the source of groundwater for cooling and re-injecting the water back into the aquifer. This is not only very energy efficient, but uses little to no water for cooling, saving on both capital expenditures (CAPEX) and operating expenditures (OPEX) through the elimination of much of the cooling equipment. The net impact addresses both the energy and water efficiency of the equation for a very energy efficient, and therefore sustainable, cooling solution.
Highly Efficient Electrical Solutions
Major efficiency gains have been made in recent years in electrical equipment that can improve your data centers’ PUE. There are multiple manufacturers of UPS’ that are reaching efficiencies of 96-98 percent at less than 50 percent load. This is important if you utilize A and B feeds to your equipment for redundancy.
Another trend is for the UPS to operate in a by-pass mode, which eliminates the losses through the batteries. Many are not yet comfortable with this mode of operation, but it is another efficiency gain to consider in optimizing performance. Higher voltage and DC power are also evolving trends that provide efficiency gains that bear mentioning.
Energy Efficiency Incentives and Rebates
Whether designing a new, energy efficient data center or upgrading your existing facility, there are many incentives available to help defray the cost and improve your ROI.
Power companies are commonly providing incentives based upon your performance compared to a baseline building or a baseline piece of equipment. Plan to include the power company as early in the design phase as possible, to maximize the financial benefits. Some require approval of the incentive prior ordering the equipment.
Additional Considerations
There are additional considerations beyond those mentioned above in optimizing your mission critical facility’s efficiency.
- System modularity is an accepted practice that affects efficiency.
Implementing modular and rapidly expandable designs in lieu of installing full
density on day one typically results in higher efficiency through higher
equipment utilization. This saves on CAPEX and OPEX, making for a smart business
decision.
- Cogeneration, also known as combined heat and power (CHP), has gained in
popularity and can be as high as 60-80% efficient compared to the typical 30%
efficiency of normal power plants.
- Peak power shaving can also be achieved through thermal storage. This is done by creating ice at night when power rates are lower and utilizing the ice for cooling during the day.
Measure, Improve, Monitor and Repeat
Regardless of the selected energy efficiency measures in your new or existing data center, make sure you measure your initial or existing condition so you have a baseline. After your improvements are made, measure again to determine your new condition and your ROI. In the case of a new data center, perform a total cost of ownership (TCO) analysis to guide your decisions. You should continue to monitor your efficiency and make improvements to improve your PUE relative to your initial condition. As a reminder, measuring your outcomes against those in the industry under different operating conditions may not provide an apples-to-apples comparison.
Monday, June 18, 2012
Design & Operate a Data Center for Energy Efficiency
2-day Training Seminar on EU Code of
Conduct for Data Center Energy Efficiency (2012)
The Best Practices for Designing an Energy Efficient Data Center | ||||||||||||||||||||
Overview | ||||||||||||||||||||
In response to the rising challenges facing data centre operators,
owners, systems designers, equipment manufacturers and customers, the European
Commission have introduced the Code of Conduct for Energy Efficiency in Data
Centres. The Code aims to raise awareness of the issues and opportunities and to
recommend best practice solutions. We introduces the Code, the benefits it
brings, the levels of commitment required, the technical background to the best
practices, data collection and reporting together with real examples.
This 2-day training seminar enables individuals working in data
centres to improve cost and energy efficiency. The ongoing development of the
Code encompasses topics associated with new data centre planning, design and
development, and the tuning and operation of existing facilities.
All
sections are conducted by Chartered Engineers (CEng) and help you to approach
best practices in designing and operating energy efficient data centers by our
further technical programs. | ||||||||||||||||||||
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| Should you have any enquiry, please feel free to contact us at 3796 3026 / info@stmedia-asia.com | ||||||||||||||||||||
Day 1 Content- Define, identify and list data center best practice sections - Power distribution in data center - the power tree - Optimizing the data centre requirements - Area of responsibilities (physical building, mechanical & electrical plant, data floor, racks, etc.) - Efficient cooling 1 (hot / cold aisle containment, raised floor, ceiling height, airflow control, etc.) - Efficient cooling 2 (CRAC settings, arrangement of cable trays, cabinets and cooling plants, etc.) - Efficient cooling 3 (air free cooling, water free cooling, mechanism of absorption chiller, etc.) - Interactions and interdependencies of various systems - Standby UPS - Standby ferro UPS - Line interactive UPS - Double conversion on-line UPS - Delta conversion on-line UPS - Temperature and humidity control - Factors affecting data center energy consumption Day 2 Content- Resilience level and provisioning - Data center efficiency and Uptimes Tier levels requirements - ASHRAE 2011 common environmental guidelines - ETSI EN 300 019 Class 3.1 - Select and deploy of new IT equipment - Data centre utilisation, management and planning (software, IT and M&E) - Physical building layout (site selection, water sources, use of economizers, etc.) - Lighting control (EU standards, LEED, BREEAM, etc.) - Monitoring (energy use & environmental reporting, etc.) - Items under consideration (rotary UPS, mechanical UPS, etc.) - Minimum practices for data center energy efficiency - Metrics used to measure data center energy efficiency | ||||||||||||||||||||
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Recent Participants Come Form... | ||||||||||||||
|
© 2012 Strategic Media Asia Limited
T (852) 3796 3026 | F (852) 2184 9978 | www.stmedia-asia.com Room 1303, Leighton Centre, 77 Leighton Road, Causeway Bay, Hong Kong |
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Monday, May 21, 2012
Cut Data Center Energy Bill in Six Ways
"People are looking at data center efficiency, whereas five years ago it wasn't an issue," says Adam Fairbanks, Bluestone Energy, a company that retrofits old data centers to make them more energy efficient and to qualify for utility rebates (many utilities are required to help pay for data center projects that will reduce energy use; if a project can be proven to cut energy draw by 20%, the utility might pay for as much as half the cost of the project). "Today any new data center build gets scrutinized by the CFO as well as facilities and IT."
Where lowering a company's carbon footprint was a big driver for such projects a few years ago, because of the economy, environmental concerns have gotten pushed back and today they're a matter of reducing operating expense, Fairbanks says. "Money drives the majority of the projects we work on," he says.
Fairbanks shares some of the most popular methods his clients have been using to cut energy costs in a power-guzzling data center:
- Turn the thermostat up. The common wisdom around how cold a data center needs to be has changed and an ASHRAE committee has revised the upper limits of its data center temperature recommendation up to 70-77 degrees. "People have said that's conservative, and many equipment manufacturers have said that up to 90 degrees is OK for their products," Fairbanks says.However, you have to be able to manage the movement of air before you can raise temperatures, he warns. If the air is not coming through the floor properly (due to excessive wires in the way or something) or air is swirling around, you won't see efficiencies.
And you still have to cool computing equipment, even with a set point of 90 degrees. A server left running by itself uncooled would probably fry itself, Fairbanks says. "At one data center I was at recently, we did a thermal scan, where we measure and map temperatures all over the facility. One rack was at 110, which is a danger level," he says. With the proliferation of blade racks, such high cabinet temperatures are becoming more common, and there's a tendency to put all the racks in one corner of the data center, which creates one huge hot spot.
- Upgrade the HVAC. "About 30% of the power used by a data center is consumed by cooling," Fairbanks says, and the average data center is over-cooled by three or four times. A new cooling system also causes less stress on day-to-day operations than bringing in other types of new equipment. "If you put in new servers and power units, you have to rewire half the data center and move things around and it's higher risk than changing the HVAC," he says. "If you have a backup HVAC system for redundancy, you can flip over to the backup while you install the new system and achieve payback quickly."
- Use cold and hot aisles. This method of laying out a data center such that cold air used to cool computers is kept separate from the hot air they generate has been around for years, but has become more widely adopted this year.
- Try blanking panels. Server racks often have holes in the back of the cabinet, especially racks that are not full of blades. The cold air that is pushed up through the floor into these rack can escape out of the holes and into the hot aisle, causing the air conditioning system to run less efficiently. A blanking panel closes over the holes so that cold air is used exclusively to cool the servers in the racks.
- Virtualize. "There's often a conflict between the business units that own the racks and the IT staff that want to use virtualization," Fairbanks says. But here's an incentive: his company has qualified data centers for utility rebates through virtualization projects, since reduced power supplies are required for fewer servers.
- Get cooling and heating equipment to work together. Some inefficiencies are caused by CRAC units that operate independently and often fight each other, Fairbanks notes. Heating systems can conflict with air conditioning and humidifiers sometimes defeat the purpose of dehumidifiers. Bluestone offers software that has sensors and controls that monitor temperature and humidity all over a data center and aggregate information from all the units to a central point that monitors and manages all the set points. The company also provides fan trays that pull air from the floor efficiently into racks where wires or other obstacles are impeding the flow of air.
Adopted from http://www.wallstreetandtech.com

Labels:
ASHRAE,
Carbon Footprint,
Cold Aisle,
Cooling,
CRAC,
Data Center,
Efficiency,
Energy,
Hot Aisle,
HVAC,
Virtualization
Location:
香港
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