Power Management in IT

What is Power Management in IT means ?

The IT industry developed the power management or "sleep" feature that improved the energy efficiency of office equipment like computers, while helping to extend the life and performance over the long run.

Today, virtually all office equipment manufacturers now integrate power management features into the basic design of office equipment, (computers, monitors, printers, faxes, copiers, scanners, and multi-function (all-in-one) devices).

When is power management working?

Power management works when you stop working. PM is engaged when you leave your computer idle for a set amount of time (a time the user can adjust) and the monitor goes black. The monitor should also go black after a screen saver has been on for some amount of time. However, when the screen is dark, or black, it's not really off; it is simply sleeping, cooling down and reducing wasted heat at a time when full power is not required. A simple move of the mouse or touch of the keyboard will cause it to power up. Many new computers now come with a special sleep button on the monitor or keyboard, so with a quick touch, the computer immediately powers down and sleeps. This feature is particularly popular in laptops but is finding its way into desktop and deskside designs.

Enabling the PM features of office equipment can reduce operating costs and serve as an important part of any organization's environmental program.

"Business users will benefit from lower average power consumption – up to a 60 percent

average power saving…Users will no longer be required to make critical trade-offs
between system performance, connectivity and efficient power saving."
 - David Chan, Strategic Initiatives Manager, Intel Corporation

"Continual improvement in energy efficiency of IBM's computers, monitors, and printers

through design and power management features is a key ingredient in helping our
customers reduce the total cost of ownership…this also helps the environment by
minimizing demand on electricity."
– Mary Ann Flandera Christie, Program Manager, IBM

Why to use Power Saving Mode or switch off the PC when not in used ?

PC Power Down powers down a PC if it has been left on and switches off the power to the computer's peripherals including the monitor at a scheduled time each day saving electricity and unnecessary carbon dioxide (CO2) emissions.

  • Reduce fire risk associated with leaving electronic items powered and unattended .
  • Reduce CO2 emissions by 750kg* a year per PC (the equivalent of you taking 7 return flights from London to Paris).
  • Improve computer security: PCs cannot be attacked when powered down.
  • Extend life of your PC and its peripherals.
  • The PC Power Down block comes with surge protection.
  • Save the Planet - Using PC Dower Down to eliminate electricity wasted by having a computer powered up when it is not needed will save 0.43kgCO2/kWh, that equates to 0.75 tonnes of CO2 emissions that would be created in generating the wasted electricity.

  
Some Facts :
 
  • A typical 150-watt PC consumes about 876 kilowatt hours per year.
  • A typical PC Consumes 150 Watt / Hour.
  • Working Hours: 8 Hours / Day
  • If machines are not switched off, PC ON time: 24 Hours / Day.
  • Working Day's in a Year: 220 Days.
  • Power Consumed per PC per Year ( 8 hours / Day ): 150 Watt / Hour * 8 Hours / Day * 220 Days = 264 kW.
  • Power Consumed per PC per Year( 24 hours / Day ): 150 Watt / Hour * 24 Hours / Day * 365 Days = 1314 kW.
  • Energy Charge (Paisa /kWh): 400 Paisa /kWh
  • Annual Cost ( 8 hours / Day ): 400 Paisa /kWh * 264 kWh = Rs. 1056
  • Annual Cost ( 24 hours / Day ): 400 Paisa /kWh * 1314 kWh = Rs. 5256
If the Machines are switched off after 8 hours of working, we are able to save 80 % of electricity bill.
References:  

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