SGBI Solutions Technology Controls

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SGBI - Solutions TechnologyControls

• Harry Swinbourne
• Saving Energy to Benefit your Business

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Solutions Technology - Controls

• Saving Energy to benefit your business
• The choices, save it or waste it.
• Every pound saved is added to the bottom line as
  profit.
• Industry has been here before, energy crisis of
  the 70s 80s Save It campaign.
• Energy saving techniques can be manual but
  greatly enhanced if automatically implemented -
  Optimiser
• Control systems permit the efficient use of
  building with minimum energy consumption while
  maintaining adequate level of comfort Digital
  controls
• Following slide explore some of the strategies
  that can be applied to commercial buildings

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Optimisation
To minimize energy cost, a building should only
be heated when needed (when used)

• Optimisation function is able through a
  self-learning algorithm mode to
• Switch on the heating as late as possible
  without sacrificing comfort
• Switch off the heating as soon as possible
  without sacrificing comfort

• The time for a building to heat up or cool down
  is influenced by
• Building characteristics
• Heat gains from additional sources
• Outside air temperature

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Outdoor Temperature Compensation
The energy required to keep a building at the
right temperature depends on the varying outside
temperature

• self adaptive algorithm maximize comfort and
  energy efficiency by
• Automatically adapting to outdoor
• conditions
• Automatically adapting to each building
• characteristic
• Condensing boilers to work in condensing mode

The energy required to keep a building at the
right temperature depends on the building
characteristics (insulation, heating equipment
used ...)
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Demand Driven Heat Generation
Typical System
- The boiler produces a fix amount of heat
energy. - Each energy user locally regulates
how much energy is used
Demand Driven solution
- Each energy user tells the boiler how much
heat he needs - The Boiler produces just enough
heat for all energy users
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Electronic Care Taker
When the outdoor temperature is high enough the
building doesnt need heat

• CentraLine Electronic Care Taker automatically
  calculates when to heat or not considering
• Outdoor temperature
• Storage masses of the building
• External heat available

- The storage masses of a building influence the
time at which to switch the heat on or off. -
There is external heat available in a building
(solar radiation, personal heat, lighting, PCs
...)
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Global Time Schedule Building Zoning
Different parts of a building will typically have
different heating / cooling schedules to
accomodate for different usage
There are periods (like holidays) where most, if
not all of the building will be empty. Different
buildings on a site or clients estate will have
different occupancy requirements. Sub zoning of
systems serving areas of a building - Part L
Building regulations requirement - England

• CentraLine Global Schedule function with a mouse
  click to-
• Define the setpoint to use in the exception
  period
• Define the exception period (like a holiday
  period)
• Define to which parts of the building the
  exception applies

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AHU Energy Management Control

• Maintain conditions with less power consumed.
• Free cooling Use cool fresh air whenever
  possible instead of chilled water
• Duty cycling Switch plant off 10 min every half
  hour 20 minutes in each hour 33 reduction
• Dead zone 2 Deg K between heating and cooling
• Variable speed electronic drives Most plant is
  20 oversized, Reduce speed 20 50 reduction
  in power. Pumps and Fans

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SGBI - Solutions TechnologyControls

• Harry Swinbourne
• Saving Energy to Benefit your Business

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