– E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Marta N Peter N Ivan N XX David N Humidifier with a web interface control

| 2 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Problem Why humidifying a data center so important? Relative humidity < 40% excess of static electricity cause sparks damage servers and IT equipment

| 3 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011  humidifier to server room of 80 m3  relative humidity between 40 % and 70 % (+- 5)  two days of autonomy  on-off switch  water and humidity alarms Guidelines

| 4 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Guidelines  compliance with the EU Directives 2006/42/CE and 2006/95/CE  composite material structure to hold the control unit and the water container  include a life-cycle analysis  use open source technologies  distribution of water vapour

| 5 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Types of humidifiers Evaporative Humidifiers Impeller Humidifiers Ultrasonic Humidifiers Humidifier with air compressor Warm Mist Humidifiers State of the Art

| 6 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Evaporative Humidifiers Operation Mist is produced by blowing water through a wick filter with the use of a fan

| 7 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Evaporative Humidifiers Advantatges & Disadvantatges Ensures a pure and clean moisture output Can be powerful enough to cover large area Low power consumption Fans are noisy Growth of bacteria and mold

| 8 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Impeller Humidifiers Operation In impeller humidifiers there is a fan, which blow water through a diffuser and as a result it produces fine droplets

| 9 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Impeller Humidifiers Advantatges & Disadvantatges Fan blows water through a diffuser producing fine droplets Quiet operation No filters to replace. Low power consumption. Cheaper than evaporative humidifiers. Bacteria and minerals is spread in the air along with the mist. Limited to small rooms only.

| 10 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Ultrasonic Humidifiers Operation Ultrasonic humidifiers use high-frequency vibrations to dissipate water into the air

| 11 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Ultrasonic Humidifiers Advantages & Disadvantages Ultra quiet Low power consumption No wick filters to replace. Spreading of bacteria andminerals from water Most units are limited to small rooms only.

| 12 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Humidifier with air compressor Operation The water is blown to air through nozzles with high-pressure air

| 13 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Humidifier with air compressor Advantages & Disadvantages Very effective Provides good distribution High energy consuming It is expensive to build

| 14 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Controlling system There are two basic way to solve the controlling. Our objective to choose one from these tools what is the best to realize the controlled humidity-level in a server room Two options : PLC Microcontroller

| 15 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 PLC- Advantages Have enought I/O –puts Resistant to influences Can expand easily Programable

| 16 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 PLC- Disadvantages Cost Size Highter energy consumption

| 17 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Microcontroller - Advantages Cheaper & Smaller Programable Possible to connect trought Ethernet Low energy consumption

| 18 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Microcontroller - Disadvantages Sensitive special programming language (in our case) Need 12 V power supply

| 19 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Chosing type of humidifiers Chosing type of controling system Development

| 20 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Our humidifier - sketch

| 21 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Next steps Choosing materials as a filter Making a shopping list Start building the humidifier Desinging control system Desinging web interface

| 22 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 References & Bibliography

| 23 – E UROPEAN P ROJECT S EMESTER AT ISEP SPRING 2011 Thank you for attention