The BallTech System

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The BallTech System

• On-Line cleaning system for chiller condenser
  tubes

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• The efficiency of water cooled condensers
  deteriorates over time due to fouling of the
  tubes.
• Fouling is recognised as an unavoidable
  performance impediment by chiller manufacturers
  and is allowed as part of their design spec.
  described as fouling factor.
• This deterioration in condenser efficiency
  adversely affects the chiller C.O.P. (Co-efficient
  of performance)
• A chillers output per unit of energy consumed by
  its compressor is described as the chiller C.O.P.
• A deterioration of the chiller C.O.P results in
  an unnecessary increase in energy consumption.

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Effect of Scale on Energy Consumption of Chillers
Source Philip KotzClean System Approach to Air
ConditioningHeating Piping Air Conditioning
Journal
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• Microbiological film, which is prevalent in all
  chillers, impedes heat transfer at a greater rate
  than scale.
• Scientific evidence has shown that
  microbiological film deposited on a condensers
  tubes surface has five times the heat transfer
  reduction effect of a layer of scale at the same
  thickness.

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Source N. Zelvar, WG. Charackils FL.
RoeCooling Tower Institute Houston Texas USACTI
Paper No. TP239A
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• condensers are affected by biofilm growth and
  other hard sediments like scale.
• Chemical treatment can only control the fouling
  but cannot eliminate it.
• Regular mechanical cleaning is required to
  maintain condenser efficiency within acceptable
  limits.

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The Alfred Hospital Chiiller 4Microscopic view
of condenser tubes without the BallTech System
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The Alfred Hospital Chiller 3 With BallTech
system
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Online cleaning has the greatest potential
advantage for a plant owner

• Reduces energy consumption
• Reduces water consumption
• Reduces chemical consumption
• Reduces maintenance costs
• Eliminates the risk of tube damage

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The BallTech System
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Westmead hospital - Sydney
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Melbourne Airport
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The Alfred Hospital Chiller 3
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Measuring and Verification

• Chiller output is calculated after measuring the
  chilled water flow rate and the difference in the
  chilled water temperature across the evaporator.
• Measuring the chiller C.O.P under the same steady
  state conditions before and after mechanical
  cleaning or BallTech installation will illustrate
  the chiller improvement and highlight the impact
  of fouling on operational efficiency.
• The results demonstrate the energy savings
  achieved by maintaining perpetually clean
  condenser tubes.

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385 Burke St. Melbourne
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Pay back period

• Return on investment will be a function of
• System cost
• Energy cost usage and peak demand
• Annual chiller operating hours.
• Annual average chiller load.
• In addition - water, chemical and maintenance
  savings will be observed after the first year.
• The typical payback period for an office building
  is between 2 and 3 years.