Data Center cooling is really a important part to maintain a data center.Presenter shared his experience and methodology to calculating cooling capacity for a data center.
Data center free cooling use of heat wheel techMike DeCesare
The following presentation highlights the use of advanced heatwheel technology to support free cooling initiatives in a state of the art data center facility
Data center cooling infrastructure slideLivin Jose
CRAC vs CRAH, what is Air-Side Economizer, What is chillers, What is cooling tower, what is CRAC, What is CRAH, what is the importance of cooling in data center, what is Water Side Economizer,
Data Center cooling is really a important part to maintain a data center.Presenter shared his experience and methodology to calculating cooling capacity for a data center.
Data center free cooling use of heat wheel techMike DeCesare
The following presentation highlights the use of advanced heatwheel technology to support free cooling initiatives in a state of the art data center facility
Data center cooling infrastructure slideLivin Jose
CRAC vs CRAH, what is Air-Side Economizer, What is chillers, What is cooling tower, what is CRAC, What is CRAH, what is the importance of cooling in data center, what is Water Side Economizer,
heat gain values for equipment of hospital which is very use full for the load calculation of multi zone buildings. Each value is according to the standard of ASHRAE
Bits, Bytes and BTUs: Warm Water Liquid Cooling at NRELinside-BigData.com
In this video from the 2014 HPC User Forum in Seattle, Steven Hammond from NREL presents: Bits, Bytes and BTUs: Warm Water Liquid Cooling at NREL.
Learn more: http://insidehpc.com/video-gallery-hpc-user-forum-2014-seattle/
How to have installations with both high performance and low GWP impact? The newest solutions for the various types of format prove that now natural refrigerants and efficiency can coexist.
A short presentation that gives a unique insight into the rapidly evolving technology of heat pumps as they are become more environmentally friendly by using natural refrigerants and are designed to be applied to more novel applications such as desalination and district cooling.
Air can be effectively cooled by exploiting the evaporation of water atomised into very fine droplets: the change in state, from liquid to vapour, absorbs energy from the air, which is consequently cooled. Evaporation of 100 kg/h of water absorbs 69 kW of heat from the air, for power consumption of less than 1 kW!. In an air handling unit, the supply air can be evaporatively cooled and humidified (direct evaporative cooling, DEC). Alternatively, if the outside air humidity is already high, the exhaust air can be cooled by several degrees without limits in terms of humidity, as it is discharged by the AHU; this cooling capacity, using a heat exchanger, can be used to cool the incoming fresh air with an efficiency that depends on the heat recovery unit used, yet easily exceeds 50%! (indirect evaporative cooling, IEC). All this means lower unit energy consumption and smaller dimensions and capacity of the cooling coil and chiller.
ENERGY SAVINGS IN DOMESTIC REFRIGERATOR USING TWO THERMOELECTRIC MODULES& WAT...ijiert bestjournal
The study deals with hybrid refrigerator that combi nes thermoelectric (TER) and vapor compression refrigeration (VCR) and also entail exp erimental details of combined VCR & TER system. Objective is to configure hybrid refrig erator by introducing two Peltier modules (TER) in domestic refrigerator and to analyze compr essor cycles of conventional refrigerator with TER to increase energy efficiency of vapor com pression cycle. For this comparison of standalone VCR and Hybrid VCR+TER system is carried out. A Peltier module of size 4cm � 4cm � .4cm is introduced in the refrigerator cabinet & t he effect on energy efficiency in terms of trip time of compressor is recorded. The e ffect of Air cooled & Water cooled condenser with TER in different structures is also investigated. It is observed that by introducing thermoelectric effect,energy consumpti on of VCR is reduced by almost 10.92% annually,which accounts for 80 units per year. Thu s ultimately improving COP of the hybrid system with better control on temperature over the total run time.
heat gain values for equipment of hospital which is very use full for the load calculation of multi zone buildings. Each value is according to the standard of ASHRAE
Bits, Bytes and BTUs: Warm Water Liquid Cooling at NRELinside-BigData.com
In this video from the 2014 HPC User Forum in Seattle, Steven Hammond from NREL presents: Bits, Bytes and BTUs: Warm Water Liquid Cooling at NREL.
Learn more: http://insidehpc.com/video-gallery-hpc-user-forum-2014-seattle/
How to have installations with both high performance and low GWP impact? The newest solutions for the various types of format prove that now natural refrigerants and efficiency can coexist.
A short presentation that gives a unique insight into the rapidly evolving technology of heat pumps as they are become more environmentally friendly by using natural refrigerants and are designed to be applied to more novel applications such as desalination and district cooling.
Air can be effectively cooled by exploiting the evaporation of water atomised into very fine droplets: the change in state, from liquid to vapour, absorbs energy from the air, which is consequently cooled. Evaporation of 100 kg/h of water absorbs 69 kW of heat from the air, for power consumption of less than 1 kW!. In an air handling unit, the supply air can be evaporatively cooled and humidified (direct evaporative cooling, DEC). Alternatively, if the outside air humidity is already high, the exhaust air can be cooled by several degrees without limits in terms of humidity, as it is discharged by the AHU; this cooling capacity, using a heat exchanger, can be used to cool the incoming fresh air with an efficiency that depends on the heat recovery unit used, yet easily exceeds 50%! (indirect evaporative cooling, IEC). All this means lower unit energy consumption and smaller dimensions and capacity of the cooling coil and chiller.
ENERGY SAVINGS IN DOMESTIC REFRIGERATOR USING TWO THERMOELECTRIC MODULES& WAT...ijiert bestjournal
The study deals with hybrid refrigerator that combi nes thermoelectric (TER) and vapor compression refrigeration (VCR) and also entail exp erimental details of combined VCR & TER system. Objective is to configure hybrid refrig erator by introducing two Peltier modules (TER) in domestic refrigerator and to analyze compr essor cycles of conventional refrigerator with TER to increase energy efficiency of vapor com pression cycle. For this comparison of standalone VCR and Hybrid VCR+TER system is carried out. A Peltier module of size 4cm � 4cm � .4cm is introduced in the refrigerator cabinet & t he effect on energy efficiency in terms of trip time of compressor is recorded. The e ffect of Air cooled & Water cooled condenser with TER in different structures is also investigated. It is observed that by introducing thermoelectric effect,energy consumpti on of VCR is reduced by almost 10.92% annually,which accounts for 80 units per year. Thu s ultimately improving COP of the hybrid system with better control on temperature over the total run time.
This presentation was originally delivered at AFCOM's Data Center World conference in May, 2014 in Las Vegas, Nevada. The presentation discuss the state of cooling and airflow management, and also introduces Upsite's newest solution, AisleLok Modular containment. For more information, please visit http://upsite.com/aislelok-modular-containment
PAC 2.5 Efficiency is Attainable, What are you Waiting for?SchneiderITB
This presentation covers ways to increase data center efficiency. From what we consider the basics to more advanced techniques and then through services that are available. Many of these are covered through individual white papers and presentations but we wanted to bring these topics together under one presentation.
On September 15th, Green IT Amsterdam and Paris Region Entreprises invited you to join them in Paris and get some insight into European knowledge and expertise on datacenters, especially on the sustainability issues.
WE learned more about the PEDCA project and How to reorganize computer rooms and data centers in an energy efficient way !
Critical design elements for high power density data centersInternap
When it comes to high-power density data centers, all are not created equal. As organizations increasingly focus on heavy-duty, transactional workloads like big data analytics, they’re seeking space that can support upwards of 17kW per rack. Delivering these super high-power densities while ensuring tolerable working conditions requires careful planning and significant attention to air flow management, temperature control and electricity.
One of our most popular webinar presentations on data center cooling: 2007 Data Center Cooling Study: Comparing Conventional Raised Floors with Close Coupled Cooling Technology.
If you're looking for a solution, it's simple physics: Water is 3,500 times more effective at cooling than air. But, liquid cooling carries a large stigma particularly because of the large price tag. And, if you're like other Data Center Managers, the words of Jerry McGuire may be ringing in your head "Show me the money!"
To view the recorded webinar presentation, please visit http://www.42u.com/data-center-liquid-cooling-webinar.htm
Data Center Lessons Learned at an Intel data center. Innovations in cost and energy savings in high-density data centers including: air economizer, retrofit of factory builiding, high efficiency air-cooled cabinets, and a container data center proof-of-concept.
Utilization of Computer Room Cooling Infrastructure: Measurement Reveals Oppo...Upsite Technologies
Study of data centers reveals the average computer room has cooling capacity that is nearly four times the IT heat load. When running cooling capacity is excessively over-implemented, then potentially large operating cost reductions are possible by turning off cooling units and/or reducing fan speeds for units with variable frequency drives (VFD). Using data from 45 sites reviewed by Upsite Technologies, this presentation will show how you can calculate, benchmark, interpret, and benefit from a simple and practical metric called the Cooling Capacity Factor (CCF). Calculating the CCF is the quickest and easiest way to determine cooling infrastructure utilization and potential gains to be realized by AFM improvements.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
Have you ever wanted a Ruby client API to communicate with your web service? Smithy is a protocol-agnostic language for defining services and SDKs. Smithy Ruby is an implementation of Smithy that generates a Ruby SDK using a Smithy model. In this talk, we will explore Smithy and Smithy Ruby to learn how to generate custom feature-rich SDKs that can communicate with any web service, such as a Rails JSON API.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
FIDO Alliance Osaka Seminar: The WebAuthn API and Discoverable Credentials.pdf
Cold Aisle Containment – Maximum kW per Rack
1. COLD-AISLE CONTAINMENT IN DATA CENTRES
the smart concept for optimal energy use
www.knuerr.com
Application Report
Cold-Aisle Containment in Data Centres
The smart concept for optimal energy use
Cooling requirements in data centres are continually rising, causing conventional climate control systems to be
overloaded.
Switching to a water cooled systems is an option, but structurally and financially this is not always possible.
Cold-Aisle Containment (CoolFlex) is another option. This option consistently separates cold and warm areas
without requiring structurally changes to the data centre.
Over several weeks the efficiency of CoolFlex was tested and proved. The test was conducted using fan heaters to
simulate the heat load generated by servers.
The result: At a thermal load of ca. 14kW per rack, the required temperature of 23°C in the cold aisle was
reached. During further tests, several computer room air conditioning units (CRAC) were switched off to
simulate an emergency. During these tests the cold aisle temperature of 23°C was only marginally
exceeded.
1
2. COLD-AISLE CONTAINMENT IN DATA CENTRES
the smart concept for optimal energy use
www.knuerr.com
Description of application:
Test conditions
The raised floor provided greater energy efficiency by directing cool air through perforated plates in the cold aisle
and by sealing the cable entry in to the racks. Knürr isolated the cold and hot zones within the server racks using
infill panels. All 4 cold aisles were then enclosed using cold aisle containment.
The 342 KW heat capacity was simulated via fan heaters (38 x 9kW = 342 kW). 288 kW heat capacity was
simulated within aisle 2. Aisle 1, 3 and 4 were not in use and therefore produced no heat. The remaining 54 kW
were distributed throughout the room, simulating the heat capacity in the network and free standing racks.
To minimise the loss of circulation and pressure caused by the raised floor, Knürr used special “grate catch”
instead of perforated raised floor plates. All holes for cables through the floor were sealed to prevent hot air
shortcuts.
The CRAC units used were designed to use 250 kW in their energy-efficient, normal mode and 500 kW at high
power mode. The capacity of the fans is proportional to the third power of the circulatory. Therefore it is more
energy-efficient to run all CRAC units at lower speed, instead of using less CRAC units at their maximal speed. By
consistently isolating cold and warm air, the nominal capacity of the CRAC units is increased, therefore the same
number of CRAC units can run at a high power mode, without reducing redundancy.
2
3. COLD-AISLE CONTAINMENT IN DATA CENTRES
the smart concept for optimal energy use
www.knuerr.com
Test areas
Test 1: Energy-efficiency in normal mode
6 CRAC units in normal mode (speed ca. 30%)
Pressure test with a rising thermal load
Results during full load(ca. 288 kW in aisle + 54 kW)
Temperature of cold aisle: 23,0 °C
Temperature of warm aisle: 37,0 °C
Test 2: Emergency (Breakdown of 2 CACUs)
3 CRAC units in emergency mode (speed ca. 80%)
Results during full load(ca. 288 kW in aisle + 54 kW
Temperature of cold aisle: 23,1 °C
Temperature of warm aisle: 42,9 °C
3
4. COLD-AISLE CONTAINMENT IN DATA CENTRES
the smart concept for optimal energy use
www.knuerr.com
Test 3: Extreme emergency (Breakdown of 4 CACUs)
2 CRAC units in emergency mode (speed 100%)
Results during full load(ca. 288 kW in aisle + 54 kW)
Temperature of cold aisle: 23,5 °C
Temperature of warm aisle: 47,0 °C
With only 2 CRAC units the temperature in the cold aisle did not exceed the required 24°C.
After a time the fan heaters simulating server heat load failed due to a fail safe switch.
Results and Conclusions
To discover the maximum capacity of cold aisle containment by increasing the heat capacity in the data centre.
- Load per Rack 3.6kW (Face: 3.5 m² = ca. 1‘000 W/m²) = possible!
- Load per Rack 7.6kW (Face: 3.5 m² = ca. 2‘000 W/m²) = possible!
- Load per Rack 10.8kW (Face: 3.5 m² = ca. 3‘000 W/m²) = possible!
- Load per Rack 14.4kW (Face: 3.5 m² = ca. 4‘000 W/m²) = possible!
The cold aisle containment could possibly discharge a higher heat load however the fan heater fail safe thermostat
caused at collapsed after 4'000W/m². Also the test equipment was not calibrated for higher heat load. Therefore
we could not demonstrate the limits of the cold aisle containment.
Note: It is important to note that during this pilot project, fan heaters were used to demonstrate the cooling
capacity. Fan heaters can only simulate the heat generated by servers, as they have a lower flow volume across
the server. We are positive, that in a real situation, 10 to 12 KW per rack should be possible (various other experts
do not differentiate between the use of fan heater and real servers)
4
5. COLD-AISLE CONTAINMENT IN DATA CENTRES
the smart concept for optimal energy use
www.knuerr.com
Pictures of test site
5
6. COLD-AISLE CONTAINMENT IN DATA CENTRES
the smart concept for optimal energy use
www.knuerr.com
Services provided
Using trained personnel, Knürr is able to provide the following services:
Consulting, calculation, and simulation of a solution.
Simple installation into existing racks (dependent of make of rack).
Integration and installation without the need for down time.
• Data Centres Thermal Assessment
- Review of thermal demands and air flow within the data centre
- Thermal imaging of the computer centre, several aisles and/or racks
- Proposal of cost effective measures
- Complete report, with achievable improvements
• “Cold Aisle Containment” implementation of the solution
- Site visit (inclusive demarcation of project specific items, especially competitor racks)
- Creation of project plan
- Detailed pricing offer
Knürr AG
Mariakirchener Straße 38
94424 Arnstorf
Telefon +49 (0) 87 23-27-0
Telefax +49 (0) 87 23-27-154
E-Mail: info@knuerr.com
www.knuerr.com
6