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Industrial DSM focuses its energy electricity efficiency activities on the
following areas:
Motor supervision
and control
Fans and pumps
Compressed air and
gas systems
Lighting
Variable speed
drives
DSM load management
Motor supervision and control
- Switch off any drive that is running when it is not
adding value to the operation for which it was intended (an example,
switching off auxiliary pumps and saving water needed for cooling process
equipment when a plant is not running).
- Use electricity efficient motors.
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Fans and pumps
- Evaluate pump and fan systems regularly to
check for leaks and proper placement:
- Assure thorough maintenance of systems
- Replace fan belts and filters at the
appropriate times
- Match the pump of and fan curve to the load
curve
- Ensure the right-sizing of pumps and fans
match the load
- Consider alternatives to conventional
pumping where feasible
- Check conditions of fan belts
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Compressed air and gas systems
- Replace let-down valves by with expanders to
recover energy
- Optimise the operation of cooling systems
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Lighting
- Install electricity-efficient lighting
systems
- Use electronic ballasts and save up to
60(?)% of the required energy
- Switch off lights
- Install lighting control systems
- Install energy-efficient lighting
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Variable
speed drives
- Install variable speed drives on cubed law
loads(?) and save up to 60(?)% on energy
- Replace efficient motors rather than
rewinding them
- Upgrade to higher efficiency motors
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DSM load
management
In the industrial sector the Eskom focus is on
giving industrial consumers an incentive to shift load form from peak periods
to quiet off peak periods during the day. Industries would be able to manage
their own load shifting activities without disrupting normal process flows or
impinging on the worker's environment productivity. Investigate load
management in the following cases:
- Water pumps that feed into or from dams
- Cooling equipment that operates in
conjunction with cool storage media (for example, ice storage and fridge
plants in mines)
- Heating equipment that operates in
collaboration with heat storage facilities (for example, electrical elements
in hot water storage tanks)
- Materials handling equipment that work in
conjunction with silos or stockpiles (for example, conveyors and bunkers)
- Dual fuel systems that operate onswitch
between electricity and other energy sources carriers sources at the
discretion of the consumer.
- Discretionary loads that can be shed for
short periods of time (for example, cycling air conditioners and tolerating
higher temperatures)
- Maximum demand control devices that shed
loads in a load priority sequence
- Production equipment and plant utilities
that do not need to run all the time - can be scheduled to run off-peak
- Maintenance can be scheduled to switch
equipment off during on-peak periods
- Test equipment requiring large amounts of
power should be utilized (used ?)at off-peak periods.
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