EPSCO Ltd Energy Sector – Cooling System Solutions
EPSCO Chemically Engineered Solutions, Practically Applied to Solve Emission and Efficiency-Related Problems in Cooling Systems
Common Problems • Sedimentary and • Biological Fouling Scaling Deposits – biofilms formed by organics, fungi and – solids naturally bacteria in present in water circulating water form surface deposits
Effects • Restricted Contact Between Air and Water – reduced heat transfer – decrease in condenser performance • Spiralling Build Up from Deposits – significant weight on pack – system contaminants
Impacts of Effects • • Exhaust steam not Increasing water treatment sufficiently cooled costs • • Air & water flow restrictions Pack collapse
Fouled Fill-Pack Restricted Decreased Air Flow Water Flow Warmer Water Reduced Condenser Temperature Performance
Fouled Fill-Pack Restricted Decreased Air Flow Water Flow Warmer Water Reduced Condenser Temperature Performance
Potential Costs & Risks • Maintenance Issues – costly pack repairs and replacements – excessive downtime • System Inefficiencies – increase in fuel usage – decreased condenser performance • Environmental Concerns – surplus water usage – increased carbon emissions – increased plume • Health Concerns – airborne particulates (bacteria and water treatment chemicals) • impacts on company employees and local residents
Traditional Methods of Cleaning Cooling Towers • High Pressure Water Jetting – causes irreparable damage to pack and drift eliminators – damages the surface of timber structures – removes wet rot protection – substantial down-time - largely ineffective
Traditional Methods of Cleaning Cooling Towers • Changing the Pack – results in substantial down-time – incurs the cost of new pack – disposal cost of old pack – access and handling Health & Safety concerns • Biocide Dosing – prolonged, regular treatment required – does not remove existing deposits or bio- film – limited ability to stop build-up
Patented EPSCO System
Patented EPSCO System • Initial No-Obligation Survey – pack assessed by our operatives – samples taken for laboratory analysis – specifically tailored to individual towers and cells – tower/cell mapped due to variation of deposit accumulations – chemical solution determined by survey and laboratory analysis
Patented EPSCO System • Downtime Minimised – 12 days for hyperbolic towers, 3-4 hours for conventional forced draft cells – un-treated towers or cells may remain active – minimum disruption to production – non-intrusive • A Fraction of the Cost of Pack Replacement – temperature difference improved by up to 3-4°C – cost of treatment recouped in around 6 months from resulting efficiency gains
Patented EPSCO System Pre v's Post Treatment Weight (pounds) 1000 Pre Treatment 500 Post Treatment 0 1 2 3 4 5 Pack Layers 214 522 548 576 563 Pre Note: Results from Treatment a 5-layer system 197 195 191 197 195 Post Treatment • Tangible results of EPSCO treatment • Weight reduction in 15m³ section of pack = 1448lbs/658kg • Pack condition returned to as good as new
EPSCO – Cost Savings • Significant Efficiency Gains – temperature reduction minimises plume • less requirement to introduce make-up water into the system as less water is discharged into the atmosphere – drastic improvements in condenser efficiency • generating greater power output from the same fuel usage
Summary • Level of IPPC Compliance is Increased • EPSCO Treatment will Save Money
EPSCO Ltd +44 1738 446363 Arran Road Perth PH1 3DZ Scotland info@epsco.co.uk UK
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