Cooling and Ventilation Technologies

Transcription

1 Cooling and Ventilation Technologies IT, Server and Telecoms Fresh Air Systems Energy Efficient Direct Evaporative Cooling EcoCooling Ltd. Bury St Edmunds, IP28 6RE T: +44 (0) E:

2 The Fresh Air Direct Evaporative Cooling and Ventilation Innovation Specialists Established in 2002, EcoCooling are the largest manufacturer and distributor of fresh air direct evaporative coolers in the UK, with over 3,000 installations worldwide. Based in Suffolk, the UK manufacturer has over 15,000m 2 of warehouse and manufacturing space ensuring short lead times on orders. EcoCooling are credited with revolutionising the control systems required to use the equipment in IT and AHU systems. The in-house R&D department works to incorporate the latest energy efficient technologies into all product ranges ensuring our clients have some of the most innovative ventilation and cooling systems in the world. This focus on innovation has also resulted in EcoCooling holding a number of patents for fresh air technologies. Our complimentary in-house design consultancy service capitalises on our vast industry experience to work closely with consultants and clients to design the most efficient systems possible. EcoCooling systems are designed to be used across the IT industry, specific applications include data centre, UPS and comms room cooling. Please contact sales@ecocooling.org if you require a bespoke design or would like to discuss your project with our technical sales department. HOW ECOCOOLING SYSTEMS WORK: Ventilation: Energy efficient EC fans move fresh air through the building at a specified flow rate. Attemperation: Using the EcoCooling control system hot exhaust air is mixed with cold external air to supply air at a constant temperature. Evaporative Cooling: Air is passed over a wetted cooling pad, the air temperature is reduced as the water evaporates. Controls: EcoCooling s advanced control system has been developed based on our extensive experience in fresh air cooling of IT equipment. It automatically optimises the energy savings and operation of the system once commissioned. Filtration: EcoCooling offers a number of filtration options to satisfy the air quality levels required in different IT environments. ADVANTAGES OF USING DIRECT EVAPORATIVE COOLING No refrigerants, completely natural cooling process Low running and maintenance costs Low carbon and energy use (~3% of AC alternative) Exploits the maximum amount of free cooling available Low energy use even at partial population ADVANTAGES OF USING ECOCOOLING SYSTEMS The Energy Efficient Alternative to Air Conditioning Experienced innovators in fresh air solutions and controls Free solution consultancy and design assistance Modular systems can reduce capital cost Advanced control system Patented products and controls 100% ASHRAE compliant conditions Internal and external product ranges UK manufacturers - coolers and spares all ex-stock Worldwide remote commissioning Qualify for Salix funding.

3 ENERGY EFFICIENT IT AND COMMS ROOM COOLING Free Cooling: While evaporative cooling is an extremely efficient way of providing cooling on hot days, the majority of savings come from free cooling. This is because most of the time in the UK the weather is colder than the desired supply temperature. It is during these cooler periods that the CREC (Computer Room Evaporative Cooler), fresh air ventilation and attemperation system can exploit free cooling. Case Study 1: Data Centre Operator Location: London Desired Supply Temp: 18 C, No. of free cooling days in 2013: 296 Case Study 2: Data Centre Operator Location: Manchester Desired Supply Temp: 21 C, No. of free cooling days in 2013: 330 ENERGY EFFICIENT EC FANS: As the majority of power used when the system is in free cooling mode is to drive the fans, EcoCooling incorporates low energy EC (Electrically Commutated) technology into all its IT systems and products. The majority of power savings can be made by optimising the control of the fans via the following methods: Fan speed is automatically adjusted by EcoCooling controls to meet cooling demands, lowering fan energy use. Low energy use at slower speeds (1/2 speed reduces energy consumption by 85%), meaning partial population of rooms is efficient. IT INDUSTRY COOLING GUIDELINES ASHRAE: Temperature, humidity and contamination must all be considered when designing a cooling system for a server room or data centre. The graph at the bottom shows the ASHRAE recommended allowable zones for temperature and humidity and the EcoCooling operating envelope: ASHRAE: While ASHRAE has an allowable zone from C, care should be taken as server ventilation has been shown to increase its energy use at temperatures over 25 C. EcoCooling: EcoCooling systems can provide supply air temperatures below 25 C all year round in the UK. Control systems provide close control (+/-1 C) and a large percentage of the year 16 C supply air temperature delivery is achievable. ASHRAE: The ASHRAE allowable zone is between 20-80% relative humidity. Low humidity can damage legacy equipment, however there is little evidence for detrimental effects of high or low humidity on modern equipment in IT environments. EcoCooling: The EcoCooling control system can adjust the supply set points automatically within the system to ensure that relative humidity is kept within the set point limits. CONTAMINANTS: As EcoCooling uses fresh air systems, all IT cooling systems can be designed with G4/EU4 grade filtration standards at both the supply and recirculation points. Filtration up to F7 is available upon request. CIBSE 19-23C 45-55%RH 100% 90% 80% 70% 60% 50% 40% ASHRAE 2011 Recommended 18-27C CDP 60%RH ASHRAE 2008 Class 1 Allowable 15-32C 16.5CDP 20-80%RH Manufacturer Specifications 10-35C 5-80%RH EcoCooling Capability -5 o C 0 o C 5 o C 10 o C 15 o C 20 o C 25 o C 30 o C 35 o C 40 o C 45 o C 50 o C 55 o C

4 IT COOLING AND VENTILATION PRODUCTS CREC SYSTEM - COOLING AND VENTILATION PROCESS INTERNAL PRODUCT RANGE (ECT): Compact and Flexible Solutions The ECT range of coolers are designed to be installed internally. They have multiple configuration options to allow for easy installation into rooms with limited space. Worried about getting it into your room? The ECT5400 will fit through a single door! Worried about water in your facility? For complete peace of mind a sophisticated alarm and leak detection system, capable of cutting off the water supply, has been incorporated into all of our internal products EXTERNAL PRODUCT RANGE (ECP): Proven Technology and Results The ECP range of coolers can be installed externally or inside a plant room. The standard unit is downflow however top and side discharge configurations are available. Cooling Capacity (kw) CREC (4-SIDED) SINGLE MODULE - 12,600m 3 /hr Type of Cooling System Nominal Flow Rate ΔT=5 (comms) ΔT=10 (normal servers) ΔT=15 (blade servers) Hot Air Exhaust Exhaust Damper EC Extraction Fan ECT5400 5,400m 3 /hr 9.6kW 19.2kW 28.8kW ECT ,800m 3 /hr 19.2kW 38.4kW 57.6kW ECP CREC (4-sides) 12,600m 3 /hr 22.4kW 44.8kW 67.2kW ECP CREC (3-sides) 9,600m 3 /hr 16.8kW 33.6kW 50.4kW ECP WBL 18,000m 3 /hr 38kW 64kW 96kW Choosing the right solution for you: Contact us for a short scoping document or to request a site visit from an approved installers. ECP CREC D/T Cold External Air EC Supply Fan Recirculated Hot Air Recirculation Damper Attemperated Supply Air Attemperated Air Cold Air Hot Air

5 CONTROL SYSTEMS An EcoCooling control panel is integral to the success of a CREC installation. The control system is Schneider Crouzet and the program has been developed by EcoCooling in-house over the last 10 years to optimise both the energy savings and operation of the CREC system. KEY FEATURES: Versatile Communication Options: Modbus TCP/IP allows for easy links into most major BMS systems and an in built VNC server allows the HMI to be viewed remotely on most mobile phones. EcoCooling can assist with converting data and SMPT logging on request (e.g. Provide sample scripts). SAVINGS AND PERFORMANCE DATA The EcoCooling savings calculator can estimate the possible energy savings for all of our systems based on historical weather data. We can perform cost analysis for any size data centre or comms room in most locations worldwide. Please contact us for more information. EXAMPLE COST ANALYSIS: System Design EcoCooling Limited 2015 Cooling Demand kw Flow rate required 8.3 Kg/s 7 m³/s ΔT (change in temperature) 12.0 C Resilience: All systems are fail-safe and incorporate manual control and back-up power options to ensure fans may be run independently if communication with the PLC is lost. Redundancy: All key sensors are duplicated and refrigeration can be automatically activated as a backup option. Alarm Notification: The control system automatically notifies the BMS system in the event of a problem. notification is also available on request. The control system is directly linked to the fire system, when activated it automatically closes fire dampers and switches on the backup. Historical Data and Event Logging: The HMI can log and present different variables as a trend display. Chosen data can be stored on the HMI for download at a later point via USB. This data can also be ed after a fixed time interval chosen by the user. Remote Commissioning - EcoCooling offer a remote commissioning service, saving time and money, particularly in foreign locations. The IT load of 100kW with a 12C ΔT requires a mass flow rate of 8.3kg/s with an air flow rate of 7m³/s. This equates to 25,000 m³/hr, 15,000 cfm or 221 million cubic metres of air per year. Running Cost Comparison with Refrigeration Refrigeration Coefficient of performance AC Electricity Use 50.0 kw 0 kw EcoCooler Fan Power 0.53 kw/m³/s Total Electricity Usage 50.0 kw 3.7 kw Effect on PUE Annual Usage Annual Hours 8760 hrs Operating Costs Bleed rate Cost /kwr /m³ 30% Electricity Use 438,000 kwhr 32,412 kwhr 405,588 kwhr Water Use 0 m³ m³ m³ Electricity Cost Water Cost Electricity Refrigeration 43,800 0 EcoCooling Water EcoCooling 3, Annual Savings 40, AC CRAC Chilled water CREC Energy Use Comparison Example- 100kW IT load Total Cost 43,800 3,386 40,414 Carbon Dioxide Impact kg/kwhr Carbon Dioxide UK value tonnes PUE (Power Utilisation Efficiency) The EcoCooling CREC system can help data centres achieve PUEs of below 1.1. Exploiting the EC fan technology can reduce the amount of power required further, meaning PUEs of 1.05 are now achievable in the right environments.

6 ENERGY SAVING EC FANS What does EC mean? EC stands for Electrically Commutated, which means the fan is fitted with a permanent magnet motor (PMM). What products use it? All ECT units use EC fans. They are specified by EcoCooling for any CREC/ECP systems as standard. FILTRATION FOR FRESH AIR VENTILATION AND COOLING SYSTEMS When fresh air is used in a data centre there can be a risk of either particulate or gaseous contamination. The quality of the air in the locality of the data centre can affect the feasibility of the use of fresh air. ECOCOOLING FILTRATION OPTIONS Adequate filtration is critical to a successful fresh air cooling solution in IT environments. As part of an EcoCooling system it is advised to use a minimum EU4 filtration on both the supply and attemperated air. The standard filtration options for CREC systems are: WHAT DOES IT ME FOR ME? Increased speed control: EC technology enables continuous adjustment of the fan speed to meet the cooling demands of the data centre. EcoCooling control systems are designed to take advantage of the energy savings which can be gained by modulating fan speed. EU4 pre-filter jackets these are available ex-stock to order and fit around the cooler filtering the external air. EU4 cartridge filter these are available ex-stock and can be fitted as part of the attemperation loop to ensure recirculated air is also filtered. Low power usage at partial loads: The graph to the right shows the relationship between fan speed and power utilisation. The power/speed relationship is subjected to a x 3 relationship, meaning that at half the speed the fan will be using an eighth of the electricity. Operating the EcoCooling system at half speed reduces the fan energy use by over 85%. Dual Filtration: Systems can be implemented with a combination of air intake filtration (pre-filter jackets) designed to eliminate potential contamination from external air. In addition cartridge filters can be used as part of the installation to ensure recirculated air is also filtered. EC Fan Speed/Power Relationship Curve

7 FREQUENTLY ASKED QUESTIONS What temperatures can be expected using a CREC? In the UK the temperature will not go above 23 C. What will be the levels of humidity? The CREC control system dynamically changes the air supply temperature to control RH levels. In the UK this can ensure 100% compliance with ASHRAE Class 1 Allowable standards for Relative Humidity. How is the air filtered? The standard CREC has a low level of filtration. This can be supplemented by G3 pre-filters and G4 panel filters. How much maintenance is required? It is normal to maintain an EcoCooling CREC every 3 months. A number or approved contractors can provide maintenance. How long do the filter pads last? Filter pads last from 3 to 5 years. What happens in freezing conditions? The CRECs automatically drain when not in cooling mode. The water supply system is also automatically drained to prevent frost damage in cold weather. Can you catch Legionnaires disease from an EcoCooling Evaporative Cooler? No, primarily because the circulating water is less than 20 C and no droplets are formed. An EcoCooler is classed as low risk (the same as a hot and cold water supply system). A legionella risk assessment is produced as part of the commissioning process. Is the water re-circulated? Yes, the water is re-circulated until the evaporation has concentrated it to its scaling point or when the cooling is turned off and the cooler automatically drains. What is the warranty? The EcoCooling CREC has a parts-only warranty of 2 years. Is the EcoCooling CREC suitable for all IT equipment? Older equipment such as main frame computers and paper media systems require close control of relative humidity and so evaporative cooling cannot be used. Is the EcoCooling CREC suitable for all global locations and climates? No, it is not suitable for tropical climates where the wet bulb temperature of the ambient air can exceed 25 C. EcoCooling can provide specific advice on performance for any location in the world. What is the availability of spare parts? EcoCooling holds a complete inventory of spare parts in the UK. Is the EcoCooling CREC CE marked? All EcoCooling ECP products are CE marked using UK based approved testing and assessment facilities. EcoCooling Ltd. Bury St Edmunds, IP28 6RE T: +44 (0) E: sales@ecocooling.org W: