INTELLIGENT SOLUTIONS FOR ADIABATIC COOLING IN DATA CENTERS
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1 INTELLIGENT SOLUTIONS FOR ADIABATIC COOLING IN DATA CENTERS
2 INTELLIGENT SOLUTIONS FOR ADIABATIC COOLING IN DATA CENTERS GLOBAL EXPERTISE FOR DATA CENTERS As global leaders in energy management and humidification, Armstrong understands the complex issues your industry faces every day. We have a worldwide network of resources, and more than a century of in-depth knowledge and experience, all devoted to improving efficiency, reducing energy use, and lowering costs for your organization. Solving your problems and making things easier for you is the reason we re here. ARMSTRONG CAN SATISFY YOUR DATA CENTER S MOST UNIQUE REQUIREMENTS Armstrong offers leading-edge design, manufacturing and application of dependable products and state-of-the-art technology to help your data center achieve effective cooling and precise control of relative humidity. Our energy-efficient, cost-effective solutions combine best-in-class quality and unparalleled value to consistently deliver a superior return on your investment. For more information, or to find an Armstrong representative near you, visit armstronginternational.com 1 2
3 MAINTAIN OPTIMAL CONDITIONS IN YOUR DATA CENTER ENVIRONMENT WITH EVAPACK ADIABATIC COOLING Achieve a lower Power Usage Effectiveness ratio (PUE) for your data center with EvaPack. Armstrong s highefficiency, low-maintenance solution provides reliable, trouble-free humidity control and cooling in your data center, while reducing energy use and running costs for substantial cost savings. EVAPACK IS AN ESSENTIAL COMPONENT IN THE MOST EFFECTIVE DATA CENTER COOLING AND HUMIDIFICATION STRATEGIES. Our evaporative pad humidifier is less expensive to implement and offers the lowest operating cost of any other type of humidifier. The compact design is quick and easy to install, it s simple to use and service, and it has the flexibility to adapt to your future needs. EvaPack accepts any type of water and the natural evaporative process is safe and hygienic. ENVIRONMENTAL CONTROL IN YOUR DATA CENTER Preventing IT equipment failure requires servers to be maintained in an environment with controlled temperature and relative humidity. ASHRAE s Thermal Guidelines include the following recommended values for data centers: F [18-27 C] dry bulb temperature and 41.9 F [5.5 C] dew point to 60% RH and 34.7 F [15 C] dew point. EVAPACK IS BUILT FOR YOUR DATA CENTER S MOST DIFFICULT CHALLENGES SIMPLE, SMART AND ADAPTABLE Installation is quick and easy Works with various types of water, including: potable, reverse osmosis or soft Compact design has a maximum footprint of in [600 mm] 23.6 in [60 cm] depth including droplet separator No absorption distance Water connections are on the side Draining and overflow connections: 1.5 in/[40 mm] DESIGNED FOR FLEXIBILITY AND CUSTOMIZATION Size and configuration can be tailored for your requirements Available for AHU, duct, fan wall, direct or recirculated water applications From approximately 3.8 ft² to 96.8 ft² [0.36 mç to 9.00 mç] in one piece assembly. LOW-MAINTENANCE, EASY TO CLEAN AND SERVICE Cassettes are accessible from the side, or from the front for larger sizes, which reduces the requested replacement space. Cassette maintenance can be finished within seconds. ENERGY SAVINGS AND EFFICIENCY Designed to maximize efficiency and minimize pressure drop. Example: For a 294,288.8 CFM [500,000 m3/h] airflow, a pressure drop difference of 0.2 WC [50 Pa] represents a saving of 67,500 kwh per year ($7, [6,750 ]/year at $.01 [0,01 ]/kwh). EvaPack uses heat present in the air for humidifying and cooling, resulting in lower energy consumption Optimized to provide the highest air/water contact surface up to 12% more than traditional evaporative pads THE OPTIMIZED WATER CONTACT SURFACE HELPS ACHIEVE A LOW PUE EvaPack energy consumption: PUE = + 0W to 250 W Total Facility Energy IT Total Equipment Energy Water pump, water level detector, and manual gate valves are accessible on the service side for simplified maintenance. Elements are easy to disassemble, clean, and reassemble. SAFE, HYGIENIC AND EFFICIENT No glue or hazardous substances No fiber loss PRECISE CONTROL AND WATER SAVINGS In direct water configuration with a reverse osmosis (RO) water supply, EvaPack, used in conjunction with Armstrong s wide rangeability water valves, allows proportional control of humidification by injecting the exact quantity of water needed for the cooling process with no wastewater. 3 Encrusted silver ions prevent bacterial proliferation Fireproof High moisture absorptive capability Minimum pressure drop 4
4 HOW THE EVAPACK SERIES WORKS THE ADIABATIC PROCESS IS SIMPLE, NATURAL AND EFFICIENT EvaPack uses the adiabatic process to convert liquid water to water vapor. Dry air passes through a corrugated bank of wetted cells media made from non-organic wet fibers. EvaPack uses the sensible air heat to evaporate the water, which cools and humidifies the air. The adiabatic process consumes no electricity, making EvaPack the ideal choice for data centers trying to achieve a reduce energy footprint. Both processes have humidity ratio (Δx) increase: from Xin (A) to Xout (C). The Saturation Efficiency (η) or Cooling Efficiency is expressed in % and corresponds to the ratio between the entering dry bulb temperature and exiting dry bulb temperature over the wet bulb depression: η = Real cooling/ Ideal cooling = (Tin - Tout ) / (Tin - Twb ) with: - Tin is the inlet air dry bulb temperature, - Tout is the outlet air dry bulb temperature, - Twb is the wet bulb temperature. For the humidification process B-C: the pad efficiency is smaller, and its thickness is thinner. For the humidification process D-E: the pad efficiency is higher, and its thickness is bigger. DIRECT ADIABATIC COOLING Using the adiabatic process, outside air is cooled and humidified, then directly injected in the server room. INDIRECT ADIABATIC COOLING After warm exhaust air has been cooled using the adiabatic process, it enters a heat recovery exchanger where it is used to cool fresh air. This solution is especially convenient when outside air must be cooled without increasing its humidity. TYPICAL CONFIGURATIONS Direct evaporative humidification adds humidity to the supply air. ADIABATIC PROCESS PSYCHROMETRIC CHART There are two common psychrometric design processes for evaporative humidification Sensible heating: red horizontal lines Evaporative humidification: blue oblique lines , Heating + humidification Pre-heating + humidification + post heating Heating + humidification (line A-B-C) Pre-heating + humidification + post heating (line A-D-E-C) E ,84 C 90% 80% 20 70% 0,86 60% 50% 40% 30% 0,88 20% 0, ,82 A 0, ,80 D B
5 EVAPACK DIRECT WATER (DW) SERIES CONFIGURATION AND COMPONENTS EVAPACK RECIRCULATED WATER (RW) SERIES CONFIGURATION AND COMPONENTS OPTIONS FOR DW CONFIGURATION OPERATION SEQUENCES OPTIONS FOR RW CONFIGURATION OPERATION SEQUENCES High efficiency integral droplet separator in PP material (requested for VDI 6022 hygienic configuration) Solenoid inlet water valve Filling water pretreatment by U.V. lamp with 50μm and 5μm water filters Air relative humidity sensor Air temperature sensor Multiple stage control with solenoid valves (up to 5 stage control) Water level detector (high water level alarm) Note: For electrical options our EvaPack control panel is recommended. STANDARD COMPONENTS SUPPLIED WITH EVAPACK Water basin with draining and overflow piping Evaporative cassettes (composed of EvaPack evaporative pad and cassette frames in stainless steel AISI 304) Side and top frames in stainless AISI 304 Irrigation piping Dispersion manifold(s) with calibrated orifices A B C D Water enters from the water supply (1) and arrives to the dispersion manifold (4). Water flow is adjusted with a manual gate valve (3). Calibrated orifices deliver the water evenly over each media pad (5). Dry air passes through a corrugated bank of wetted cells media (5). Air is cooled and humidified. Excess water washes the EvaPack evaporative pad and is eliminated (with minerals) from the water basin (2) through the draining connection (6). This DW configuration is recommended with high hardness supplied water (to increase the pad life time) or with reverse osmosis water (to reduce RO water consumption). (For additional information, please consult the EvaPack installation, operation and maintenance manual.) High efficiency integral droplet separator in PP material (requested for VDI 6022 hygienic configuration) Filling water pretreatment by U.V. lamp with 50μm and 5μm water filters Water high temperature alarm Air relative humidity sensor Air temperature sensor Multiple stage control with solenoid valves (up to 4 stage control) Water conductivity sensor STANDARD COMPONENTS SUPPLIED WITH EVAPACK Water basin with draining and overflow piping Evaporative cassettes (composed of EvaPack evaporative pad and cassette frames in stainless steel AISI 304) Side and top frames in stainless AISI 304 Irrigation piping Dispersion manifold(s) A Water enters the basin, passing through the filling valve (1). The water level detector (7) controls the basin (2) filling, the pump (3) starting-up and the fill valve opening. B The recirculation water pump (3) supplies water to the different dispersion manifolds (5). The water flow of each cassette (6) is adjusted with a manual gate valve (4). Calibrated orifices deliver water evenly over each media pad (6). C Dry air passes through a corrugated bank of wetted cells media (6). Air is cooled and humidified. D Excess water washes the evaporative pad, then falls (with minerals) into the water tank. E Excess minerals are drained by the draining valve, minimizing water consumption and media scaling. This configuration is recommended when the available supplied water has low or medium hardness. (For additional information, please consult the EvaPack installation, operation and maintenance manual.) Manual adjustment gate valve(s) Water pump Manual adjustment gate valve(s) Water draining valve Solenoid water filling valve Water level sensor Note: The EvaPack control panel is required for all electrical devices
6 EVAPACK SERIES MODEL NUMBER MODEL NUMBER EVA A/D xx R/L DW/RW wwww hhhh ttt 0/1 EVAPACK EVAPORATIVE PAD The EvaPack evaporative pad is an inorganic pad made of fiberglass sheets. High degree of wetting Special impregnated glass fiber material allows for high moisture absorptive capability, ensuring continuous humidification. Installation A: for air handling unit D: for duct Modular Configuration Droplet separator 0: without droplet separator 1: with droplet separator Pad Thickness in mm Height in mm Width in mm Rigid The media has a corrugated and compact structure that allows no rigidity loss, and no fiber loss in the air flow. Safe Contains no harmful substances. Complies with the Directive Restriction of Certain Hazardous Substances (RoHS) 2011/65/UE (2002/95/CE). Hygienic Fulfils requirements from the VDI 6022, Part 1 (04/2006) in microbial inertness and is suitable for use in HVAC-systems relating to this examination of microbial inertness. Fireproof Noncombustible Euro Class A1 according to EN ISO 1716:2011 and UNE EN ISO 1182:2011. Versatile EvaPack evaporative pads accept any potable water, soft water and reverse osmosis water and can be used in all industrial and comfort applications. Free of odor No odors from chemicals or organics. Efficient The EvaPack evaporative corrugation flute angle configuration is designed to maximize efficiency and minimize pressure drop Service position R: right hand L: left hand Water System DW: Direct water RW: Recirculated Water EVAPACK MEDIA PAD PERFORMANCE CHARTS BASED ON PAD THICKNESS Optimal Saturation Very Low Pressure Drop Pressure Drop Efficiency or Cooling Effectiveness in % EVAPACK SERIES SELECTION DATA Maximum width of the installation section Maximum height of the installation section Process airflow Inlet air conditions Requested outlet air conditions Application Maximum acceptable pressure drop Efficiency in % Air velocty in ft/min [m/s] Air velocty in ft/min [m/s] Droplet separator necessary. (*) maximum air velocity 900 ft/min [4.5 m/s] Note: For additional EvaPack pad thicknesses, please consult your Armstrong representative. Inch of WC 9 10
7 BASIC CONTROL FOR RW CONFIGURATION SYSTEM EVAPACK SERIES CERTIFICATIONS WATER PUMP Protected against running dry according to DIN EN Thermic protection switches pump off in case of overheating and sends an alert to the control panel Water level detector provides additional protection SAFE Contains no harmful substances. Complies the Directive Restriction of Certain Hazardous Substances (RoHS) 2011/65/UE (2002/95/CE). Based on independent tests carried out by SGS Consumer Testing Services (IAS accredited). WATER LEVEL DETECTOR Low: Pump is stopped if water goes below the low water control level. High: Filling valve is closed when water reaches the high water control level Basic control for RW configuration system. No fiber loss in the air flow from EvaPack evaporative pad. Based on independent tests carried out by SP Technical Research Institute of Sweden. DRAIN VALVE Control panel can switch drain valve on/off Drain valve controls basin emptying and water deconcentration (or bleed-off) Deconcentration cycles can be adjusted by timer or evaporated volume method MULTIPLE-STAGE CONTROL With an RH sensor and solenoid valve(s), the EvaPack control panel can adjust water distribution on pad cassettes. Up to 4-stage control. Multiple stages control for RW configuration system. HYGIENIC Designed according to VDI 6022 Hygienic standards. All nonmetallic parts fulfil requirements from the VDI 6022, Part 1 (04/2006) in microbial inertness and are suitable for use in HVAC systems. Based on EN ISO 846 independent tests carried out by IHL BERLIN Institute for Hygiene. FIREPROOF ILH BERLIN STAGES WATERING CONTROL WITH BYPASS DAMPER With an RH sensor and solenoid valve(s), the EvaPack control panel can adjust water distribution on pad cassettes and a proportional motorized damper. OPTIONAL CONTROLS Multiple stages control for RW configuration system with by-pass damper. EvaPack evaporative pads are noncombustible according to Euro Class A1. Based on EN ISO 1716:2011 and UNE EN ISO 1182:2011 independent tests carried out by Applus+Laboratories. Filling water pretreatment by U.V. lamp with 50μm and 5μm water filters Air relative humidity sensor Air temperature sensor Water temperature sensor Water conductivity sensor 11 12
8 INTELLIGENT THERMAL UTILITIES SOLUTIONS FROM A GLOBAL LEADER IN ENERGY MANAGEMENT AND ENJOYABLE EXPERIENCES The Americas Asia Europe, Middle East, Africa Bulletin-595 Printed in U.S.A. - 03/19
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