Presented By:
Sruthi N

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GREEN COMPUTING
Introduction
Green computing is the study and practice of using computing resources efficiently in an eco friendly manner”
Goals of Green IT
 A shocking fact:
 Every Google search produces 0.7 g of co2
 91 million searches/day
 18.2 tonnes co2/day
 About 7000 tonnes/year
HISTORY
 In 1992 U.S Environmental Protection Agency created Energy Star program
Energy Star
 Program designed to reduce energy consumption and greenhouse gases
 Promote energy efficient products
Green IT Approaches
 Virtualization
 Power management
 Power supply
 Video card
 Displays
 IT Equipment recycling
 Product longevity
 Operating system support
 Virtualization
 Process of running two or more logical computers on one set of physical hardware
 Server virtualization
 Thin client
 Typical PC-220W
 Thin Client-4.8W
 Power Management
 Keep computers and PCs turned off ,when not in use.
 Disable screen saver.
 Use LCDs instead of CRTs as they are more power efficient
 Enforce standardized energy settings before distributing to end users
POWER CONSUMPTION
 Power supply
 Generally PCs are 70-75% efficient
 Remaining are lost in the form of heat
 «80 PLUS» certifies PSUs(Power supply Units) that are at least 80% efficient
 Energy Star 4.0-certified desktops must be at least 80% efficient
 Video Card
 Fast GPU is one of the larger power consumer in PC
Display options for Green IT are
1.No video card
 Shared terminal
 Thin client
2.Use Motherboard video output
 Low 3D performance
 Low power
 Displays
Use LCD instead of CRTs
Advantages of LCDs
 Up to 66% energy efficient than CRTs
 Produces less heat
 Easier to eyes
IT Equipment recycling
 Recycling computing equipments can keep harmful materials such as lead, mercury, and cadmium out of landfills.
 eiae.org - informations about recycling
 Lead : Common in CRTs and some batteries
 Mercury : In fluorescent tubes
 Cadmium : In some rechargeable batteries
LEAD
Common in CRTs and some batteries
The problem:
 cause damage to the central and peripheral nervous systems, blood system, kidneys, endocrine system and cause negative effects on child brain development
 lead accumulates in the environment and has toxic effects on plants, animals and microorganisms
MERCURY
• is used in
– batteries, switches, printed circuit boards
• The problem
– spreads out in water transforming into methylated mercury which easily accumulates in living organisms
– it enters the food chain through fish that swim in polluted waters
– methylated mercury can cause chronic brain damage
• Product Longevity
– Equipment should have a prolong lifetime
– Upgrade the computer instead of manufacturing a new one