AirLab Service

AirLab Service

The Domino Effect

The main concern in a data centre is the IT equipment health and for this reason, this method has been developed in order to improve power efficiency by improving the IT equipment health. The domino effect is produced when better management of the open surfaces in the raised floor and racks have a positive effect on the IT equipment health, which subsequently provides opportunities to improve power efficiency improvements.

 Know the health of the it equipment

  • Hotspots

A Hotspot occurs when the ambient air temperature at the IT equipment inlet exceeds 27 ºC (80 ºF) dry bulb (ASHRAE guides) or when it exceeds the maximum established for the room. The studies carried out by MPL show that, on average, 26.97% of the racks contain Hotspots or Coldspots.

  • Coldspots

A Coldspot occurs when the ambient air temperature at the IT equipment inlet is below 18 ºC (64.4ºF) dry bulb (ASHRAE guides) or when it falls below the minimum established for the room.
The studies carried out by MPL show that, on average, 26.97% of the racks contain Hotspots or Coldspots.

  • ESD

An ESD risk occurs when the relative humidity at the air inlet to the IT equipment is below 30%.

Know the efficiency

  • Bypass Airflow

Bypass Airflow is any portion of conditioned air that does not pass through the IT equipment inlet before returning to the CRAC unit. Bypass Airflow is the major cause of lost cooling capacity (stranded capacity). A study recently carried out by Upsite Technologies showed that, on average, 48% of open area in the
raised floor is poorly managed.

  • Recirculation

Recirculation is any portion of hot air dissipated by an equipment unit that returns from the rear of a rack towards the IT equipment inlet. Recirculation is one of the most significant causes of Hotspots and Esd.

  • Delta T

MPL provides a full temperature map of the room by means of four different Temperature Deltas.
These four Temperature Deltas are intended to provide opportunities of efficiency improvement, together with temperature uniformity at the equipment air inlet.

  • Cooling Capacity Factor

This is the easiest and quickest way of determining the use of the cooling infrastructure and its potential improvements.
The Cooling Capacity Factor is calculated by dividing the cooling capacity according to the rated nameplate (kW) by 110% of the IT consumption (kW).
A study recently carried out by Upsite Technologies showed that the cooling capacity was 300% greater than what the IT equipment required.

Improving IT equipment health

  • Reduce and harmonise the IT equipment inlet temperature

The simplest way to reduce and harmonise the IT equipment inlet temperature is to reduce Bypass Airflow and Recirculation. MPL provides the best product set of air flow solutions in order to eliminate or reduce Bypass Airflow and Recirculation.
A study recently carried out by MPL showed that in thirteen inspected rooms, 43.8% of the racks had unsealed cable openings (583 apertures), together with a total of 5,370 empty U that should be sealed using blanking panels.

Improving efficiency

  • Raising the return temperature

When the IT equipment inlet temperature has been reduced and harmonised, the CRAC unit return temperature can be increased. Increasing a CRAC unit return temperature by 1 ºC represents an estimated 4% savings in the power cost for this CRAC unit.

  • Switching off cooling units

The number of CRAC units to switch off is calculated using the cooling capacity according to the rated nameplate,together with the Cooling Capacity Factor. These details provide a theoretical guide that can be employed as efficiency limits and improvementpossibilities.
A study recently carried out by MPL showed that in thirteen inspected rooms, 18% of the CRAC units could be switched off. If these units had been switched off, the estimated savings would have been some 184,848.36 Euros.


Let It Be Simple

The process was developed taking into account the three fundamental factors of simplicity, time and investment.
Simplicity is the driving force behind the process, which enables the time required from data collection to when the solutions are put into practice to be as short as 48 hours.
However, simplicity is shown in that the type of solutions to be applied are the most basic on the complexity scale, attempting to make the solutions comply with the lowest possible investment.

First Visit and First Report

  • First Visit

During the first visit, temperature readings are taken and also aperture management at raised floor and rack levels. To this end, data is taken on Hotspots, Coldspots, Esd, Deltat T, Bypass Airflow and Recirculation, amongst others.

  • First Report

Under normal conditions, the first report is issued 24 hours after the visit, which means that the results correspond to the actual room conditions.

The first report details the number of Hotspots, Coldspots and Esd under a full study of temperatures shown in Delta application that reveals the uniformity of room temperatures.

The first report also presents the Bypass Airflow and Recirculation percentages, or in other words, the efficiency status with respect to air flow.

Lastly, the first report provides a list of products that must be installed in order to reduce the Bypass Airflow

 

 Delivering And Installing Products 

  • Delivering Product

Product delivery time is subject to the actual room condition, but under normal conditions, products are delivered within 48 hours of the end of the first visit.

The speed with which products are made available enables solutions to be applied in record times with respect to the start of the project.

  • Installing Products

The first issued report provides information relating to product installation. In this way, it suggests the order in which the solutions should be applied, together with the safety measures to be adopted.

The types of products to install will vary from one room to another, but the products always form part of a batch of already established products that were previously defined by both parties.

 

 Second Visit And Second Report 

  • Second Visit

After product installation and the application of the proposed solutions, a second visit enables the room status to be established with respect to IT equipment health and with respect to air flow management.

For this reason, it is verified to establish by how much the Hotspots,

Coldspots, Esd, Bypass Airflow and Recirculation have been reduced or eliminated.

  • Second Report

Under normal conditions, the second report is issued 24 hours after the visit, which means that the results correspond to the actual room conditions.

The main goal of the second report is to establish how the air flow management improvement (Bypass Airflow & Recirculation) has managed to reduce the equipment inlet temperatures and make them more uniform.

This result can be quite clearly seen by a full study of the Temperature Deltas in the room that show the improvement with respect to IT equipment health as well as with respect to air flow management.

Finally, the second report provides information on CRAC unit adjustments, together with steps to take in the future.

 

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