• HVAC & Cooling can account for up to 40% of energy consumption in a typical Datacenter. – https://www.sciencedirect.com/science/article/pii/S1876610215028337
• Global Datacenters used roughly 416 terawatts of electricity in 2017 or about 3% of the world’s total electrical consumption.- https://www.forbes.com/sites/forbestechcouncil/2017/12/15/why-energy-is-a-big-and-rapidly-growing-problem-for-data-centers/?sh=7ca4214d5a30
• Data centers are one of the most energy-intensive building types, consuming 10 to 50 times the energy per floor space of a typical commercial office building – https://www.energy.gov/eere/buildings/data-centers-and-servers

• Most CRAC Units run at full speed when on and have excess cooling capacity without the ability to adjust power to the fan and compressor resulting in inefficient cooling, excess compressor cycling, increase in O&M costs and increased energy consumption.
• Most CRAH Units Fan’s run at full speed and lack the ability to adjust power to the fan resulting in increased energy usage and a decrease in chiller efficiency.

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• Since there is a large cost to cooling Datacenters, and there is a great deal of waste in most systems, businesses pay an excess of electricity to their provider year after year after year.

• Inefficient motors and lack of controls or proper settings cause extra wear and tear on the entire system, which increases life-cycle maintenance costs.

• Datacenter efficiency gains have flattened out over the last 8 years due to energy efficient Server hardware. The next logical step to lowering PUE would be to tackle the cooling costs that account for up to 40% of power consumption in a typical Datacenter. – https://journal.uptimeinstitute.com/data-center-pues-flat-since-2013/

   

• Energy Efficiency is the main solution to combat the growing need for global server energy use as technology demands grow.

• For CRAC systems our solution is to control the return air temperature through modulation of the fan and compressor speed via a VFD and temperature sensors. Which reduces energy consumption by 30-40% and ensures a PUE  of 1.5 or lower and increasing the Datacenters capacity by up to 20%.

• For CRAH systems our solution is to modulate fan speed to control the supply air temperature at a set point. And to Modulate the chilled water valve to maintain the return air temperature at the set point. Which reduces fan power by 60-80%

• Digi-CRAC/CRAH has the ability to reduce peak energy demand by 50%, improving energy efficiency by up to 60% with the use of Variable airflow and compressor speeds while optimizing compressor sequencing and on/off controls.

• The Digi-CRAC modulates the cooling output of the computer room air-conditioning unit so that it closely matches the actual cooling demand. It eliminates frequent refrigeration compressor cycling, improves the overall efficiency of the refrigeration cycle, better facilitates control of the room temperature and humidity, and reduces energy consumption and related costs. It optimizes the supply fan speed and supply air temperature based on the space load using the patent technology.
• Running lower speeds and reducing compressor lift creates greater capacity in existing heat exchanger resulting in 20-30% compressor savings
• Running the CRAC unit at 80% speed results in 50% fan power savings due to the cube rule of fan law for power vs. speed

Our turnkey process is to Save, Measure, Analyze, Replace and Transform.  Here’s how:

• Collect existing system data and electric bills from customer.  We provide complete instruction.
• We can design an energy efficient motor/VFD and controls upgrade for existing system.  
• Run energy calculations to identify the, cost savings and Paybacks of retrofit/replacement options, and create an Investment Model proposal to review.
• Work with utility provider engineers to verify savings and secure available utility incentives for projects.
• Specify, order and manage Installation and on-site Project Management to oversee project, including pre and post data logging Measurement and Verification.
• Reconcile project to include data logging savings analysis, available utility incentives, and create a case study to share customer’s sustainability story.

To start, schedule a 30 minute discussion with one of our Energy Analysts to determine how we can help your business, and discuss the steps to determining the best path to take.

Click here to schedule a discovery call