Cooling IT infrastructure, high availability, low energy costs and
System solution for data centres
Energy-efficient air conditioning with ServeLine
Secure and efficient cooling.
Data centers guarantee high security for IT infrastructure; the requirements for building services equipment are equally high. In particular, an absolutely reliable cooling system is essential for cooling server rooms. Hoval ServeLine has been specially designed for this application – it provides absolutely secure cooling with extremely high energy efficiency: mechanical cooling is not required for 97 % of the overall operating time.
Take advantage of ServeLine
Maximum energy efficiency
■ Air conditioning by free cooling interacting with adiabatic and mechanical cooling
■ For 97 % of the overall operating time without switching on mechanical cooling
■ Continuous optimisation by the control system High availability
■ Redundant generation of cooling energy for emergency cooling with cooling coil
■ Indirect cooling with plate heat exchangers, which means no problems with dust and humidity in the IT infrastructure
Complete modular system
■ Space-saving, compact single modules
■ Scalable cooling capacity
■ Expandable in stages
Low Total Cost of Ownership (TCO)
■ Fast payback of investment with very low energy consumption
■ Low maintenance costs with service-friendly design and high-quality components
Sophisticated solution. ServeLine cools the IT environ- ment indirectly with high-efficiency plate heat exchangers.
The air in the server room remains completely separated from the fresh air; this eliminates the possibility of dust or varia- tions in humidity affecting highly sensitive IT equipment. The system uses the interaction of different resources for cooling with minimal energy consumption depending on the current environmental conditions:
■ indirect free cooling with fresh air
■ adiabatic cooling
■ mechanical cooling over cooling coil
Redundant generation of cooling energy guarantees the required high availability.
ServeLine is suitable for use in data centers with one hundred to several thousand square metres of air-conditioned IT area.
The modular construction allows the cooling capacity of the system to be scaled up as required. The required cooling capacity can be adjusted or expanded step by step simply by parallel installation of additional compactly designed individual ServeCool modules. Hoval supports and advises you with its
expertise during design and implementation of the cooling system to ensure that it is optimally set up for the layout of the computer rooms.
Capacity-optimised control. The newly designed ServeNet control system seamlessly records all relevant parameters. It compares the current efficiencies of the indirect free cooling and the adiabatic and mechanical cooling, and controls the interaction of the different systems to ensure energy-optimised, demand-led operation.
ServeNet can be fully integrated into the Datacenter Infrastructure Management (DCIM). It supplies all relevant information for real-time evaluation of the Power Usage Effectiveness (PUE) and continuous maximisation of the availability and efficiency of the data center.
Minimise energy costs.
Air conditioning the server rooms offers the greatest potential for reducing energy consumption in data centers. Hoval ServeLine is setting standards: for optimum efficiency fresh air is used for free cooling; however, indirect cooling with plate heat exchangers means that there is no need to worry about adverse influences from the outside. If fresh-air cooling is no longer sufficient, adiabatic cooling is used, which saves energy and resources. There are only a few days in the year that require mechanical cooling.
400 350 300 250 200 150 100 50
0-20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38
83% 14% 3%
400 350 300 250 200 150 100 50
0-20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38
83%50% 14%25% 3%
25%
Annual curve Hoval ServeLine
Free cooling Adiabatic cooling
Mixed mode (adiabatic + mechanical cooling) Refers to: Extract air temperature ....38 °C
Supply air temperature ....24 °C Supply air flow rate ...20000 m³/h Cooling capacity ...120 kW Location ...Frankfurt
Annual curve
Conventional cooling system (water-cooled chilled water systems with dry cooler)
Free cooling
Mixed mode (free + mechanical cooling) Mechanical cooling
Refers to: Extract air temperature ....38 °C Supply air temperature ....24 °C Supply air flow rate ...20000 m³/h Cooling capacity ...120 kW Location ...Frankfurt Fresh air temperature in °C
Fresh air temperature in °C Annual hours
Annual hours
Vast energy savings. Comparison of the annual operating data of Hoval ServeLine with those of a conventional cooling system clearly shows the huge potential for savings:
■ ServeLine reaches its full cooling capacity with indirect free cooling up to an outside temperature of 18 °C. That is equivalent to 83 % of the total operating time (in compari- son with 25 % with the conventional cooling system).
■ If temperatures increase further, cooling is exclusively adiabatic up to about 27 °C outside temperature (depending on the humidity).
■ Only at even higher outside temperatures – i.e. only 3%
of the operating time – does ServeLine operate in mixed mode with adiabatic and mechanical cooling.
In comparison: A conventional cooling system cools in mixed mode from an outside temperature of 5 °C (free and mechanical cooling) and exclusively with mechanical cooling from 17 °C.
The results: A massive improvement in power usage effective- ness, fast payback and not least a positive climate balance.
Thinking in solutions.
As a specialist in indoor climate solutions in all possible applications, Hoval concentrates on thoroughly researched integrated solutions. The development of Hoval ServeLine concentrated on the specific requirements for data centers. The result: A refined cooling solution that offers modular design, efficiency and availability. ServeLine offers operators of data centers low total cost of ownership and maximum reliability.
Modularity. ServeLine has a modular structure; the system consists of a number of individual ServeCool modules and the associated ServeNet control system. The total output is therefore freely scalable. It can be flexibly adjusted to the actual growth phase of the data center, which means that the investment can be made in stages.
Efficiency. Hoval ServeLine operates with three cooling pro- cesses: indirect free cooling, adiabatic cooling and mechanical cooling. This combination gives the highest efficiencies; the energy efficiency ratio (EER) rises to values above 18.
Availability. The cooling coils are designed so that the data center can be cooled exclusively from the cold supply of chilled water systems in an emergency. The generation of cooling energy is therefore redundant and guarantees the required high availability.
Economical
Low total cost of ownership
Ecological
Uses indirect free and adiabatic cooling
Sophisticated
Modular structure and adjustable
Easy to use
Maintenance-friendly access ports
ServeCool
Multifunctional air conditioning unit
■ Indirect free cooling with fresh air in combination with adiabatic and mechanical cooling
■ Heat exchange over plate heat exchangers with high heat recovery efficiency
■ Separate air streams (no problems with dust and humidity)
■ Fitted with high-efficiency EC fans
■ Compact design, low space requirements
■ Easily maintained with simple access and large inspection openings
ServeNet Control system
■ Demand-led control of the overall system
■ Ensures maximum energy efficiency with continuous comparison of the efficiency of the individual cooling processes
■ Seamless recording of all relevant parameters
■ Visualisation directly at the unit
■ Simple integration into building management and DCIM systems
■ Integrated safety system with warning function
Exhaust air fan Plate heat exchanger Extract air filter (G4) Spray nozzles Cooling coil
Supply air fan Plate heat exchanger Fresh air filter (M5) Bypass damper Adiabatic pump (option)
Technical data of ServeCool
Sensible cooling capacity kW 120 103
Share of mechanical cooling kW 4.3 0
Fresh air temperature / humidity °C / g/kg 35 / 7.0 35 / 7.0 Supply air temperature / humidity °C / g/kg 24 / 6.2 24 / 6.2 Extract air temperature / humidity °C / g/kg 38 / 6.2 36 / 6.2 Power consumption supply air fan kW 6.6 6.0 Power consumption exhaust air fan kW 4.6 4.6 Power consumption adiabatic pump kW 0.17 0.17
Supply air flow rate m³/h 25714 25750
Exhaust air flow rate m³/h 22000 22000
Water quantity l/h 700 0
Flow / return temperature 1) °C 14/20 –
Water-side pressure loss kPa 0.1 –
Footprint x height mm 2810 x 2825 x 4225
1) Water / glycol mixture with 30 % glycol
Saving energy with system.
Operators of data centers today are responsible for significantly reducing the energy requirements of IT infrastructure. The international company e-shelter colocation GmbH is meeting this challenge. The company has set up a new data center in Rüsselsheim in the MW range, but the energy consumption is significantly lower than that of comparable systems. For air conditioning e-shelter is using the solution developed in cooperation with Hoval.
Hoval ServeLine uses fresh air throughout the year to condition the environment of the high- tech servers; it cools indirectly using plate heat exchangers.
■ The system can provide the required cooling capacity of 80 kW per module by fresh-air cool- ing up to an outside temperature of 18 °C. That means: 7470 annual hours of high-availability operation without using even one compressor.
■ The system cools with the patented adiabatic system from 18 °C to 27 °C outside temperature (an average of around 1160 hours per year) without switching on mechanical cooling.
■ During the remaining 130 hours the mechani- cal cooling system is run under partial load in combination with adiabatic cooling for optimum effi ciency.
Hoval ServeLine is also a good choice with its extremely space-saving design. The system only requires an installation area of about 14 m² (including space for service and maintenance) for an output of 100 kW.
The instrumentation and control system, developed with e-shelter, uses an industrial controller and provides the optimum control strategy at all times.
The system selects the most effi cient system for the current conditions from indirect free cooling, adiabatic cooling and mechanical cooling to optimise the operating costs for the innovative housing provider.
Facts
Data center of e-shelter colocation GmbH in Rüsselsheim:
■ 3 suites each with 1 MW cooling capacity
■ 9 ServeCool individual modules are installed in every suite
■ Performance tested by TÜV
■ More than 85 % of the total
operating time is exclusively indirect free cooling
Weather is inspiration. Particularly so when it is as change- able as it is here in the Alps. It infl uences life in the mountains more than any other factor. We have not only learnt to forecast the weather but we also know how to use technology to integrate the qualities of the weather to our everyday life:
warmth, cold, humidity and wind – judiciously measured and correctly applied – give us a comfortable indoor climate.
Weather is motivation. Extreme conditions in the mountains inspire our employees to their best performance. This is seen in our outstanding heating and climate control solutions.
Our approach also lends clear contours to entirely different, simple and central values: We are friendly and family-run, responsible, solution-oriented, sophisticated, knowledgeable, enthusiastic and technology-driven. This shapes a culture in which the men and women at Hoval enjoy participating day by day.
Responsibility for energy and environment. Indoor climate and world climate are in an ever-changing relationship. We design our heating and ventilation systems fully aware of our responsibilities to the climate. We protect our environment with the highest possible effi ciencies and the use of regenera- tive energy sources. We all profi t from this.
Engineering the weather.
Inside and outside.
Take our word for it! Energy efficiency and alternative energy sources are what propels our company development.
This helps you to save money and raw materials.
We offer solutions tailored to your particular needs. It goes without saying that this also means providing systems that are easy to commission and operate.
We place great importance to the quality of our products, consultation and services. As suppliers of complete solutions, we often exceed our customers’ expectations.
The educational background and competence of our staff are the foundation of your satisfaction. Dedicated engineers guarantee professional, sophisticated solutions – without compromises.
We are open to unusual ideas and innovations. This, in turn, benefits your project.
As an owner-managed company, we are honest and sincere in our dealings with our employees and with our customers and suppliers.
Hoval heating technology
As a full range supplier Hoval helps its customers to select innovative system solutions for a wide range of energy sources, such as heat pumps, biomass, solar energy, gas, oil and district heating. Services range from small commercial to large-scale industrial projects.
Responsibility for energy and environment
The Hoval brand is internationally known as one of the leading suppliers of indoor climate control solutions. More than 65 years of experience have given us the nec- essary capabilities and motivation to continuously develop exceptional solutions and technically advanced equipment. Maximising energy effi ciency and thus protecting the environment are both our commitment and our incentive. Hoval has established itself as an expert provider of intelligent heating and ventilation systems that are exported to over 50 countries worldwide.
Hoval comfort ventilation
Increased comfort and more effi cient use of energy from private housing to business premises: our comfort ventilation products provide fresh, clean air for living and working space.
Our innovative system for a healthy room climate uses heat and moisture recovery, while at the same time protecting energy resources and providing a healthier environment.
Hoval indoor climate systems
Indoor climate systems ensure top air quality and economical usability. Hoval has been installing decentralised systems for many years. The key is to use combinations of multiple air-conditioning units, even those of different types, that can be controlled separately or together as a single system. This enables Hoval to respond fl exibly to a wide range of require- ments for heating, cooling and ventilation.
Hoval heat recovery
Effi cient use of energy due to heat recovery. Hoval offers two different solutions: plate heat exchangers as a recuperative system and rotary heat exchangers as a regenerative system.
International
Hoval Aktiengesellschaft Austrasse 70
9490 Vaduz, Liechtenstein Tel. +423 399 24 00 Fax +423 399 27 31
[email protected] www.hoval.com
United Kingdom Hoval Ltd.
Northgate, Newark Nottinghamshire NG24 1JN
Tel. 01636 672711 Fax 01636 673532 [email protected] www.hoval.co.uk
. 4 211 807 - 09 / 2014
