5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 1 Chilled Engineering Systems “Engineering with Nature” Ice Pond Refrigeration Derek Britten Roger Connolly Ben Francis Adam Trudeau Steve Vines

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 2 Outline OverviewOverview HistoryHistory LimitationsLimitations BenefitsBenefits

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 3 Overview Seasonal Refrigeration SystemSeasonal Refrigeration System Winter - Ice ProductionWinter - Ice Production –Fine Sprayed Water –Cold Ambient Air (Natural Resource) Summer – Load CoolingSummer – Load Cooling –Ice Melts from Load Warmed Medium –Latent Heat Cools Medium via Heat Exchanger –Medium Cools Load (Building)

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 4 Overview System ComponentsSystem Components –Watertight Reservoir (Ice Pond) –Ice Making System –Cooling System –Load

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 5 History Winter Ice Storage for Summer Cooling Dates Over 2000 YearsWinter Ice Storage for Summer Cooling Dates Over 2000 Years –Used for Food Storage –Ice Insulated by Organic Waste –Still Used Globally Water Spray Ice Making Patented in the US in 1836Water Spray Ice Making Patented in the US in 1836

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 6 History Ice Pond Refrigeration Research Began in the late 70’sIce Pond Refrigeration Research Began in the late 70’s Organizations involvedOrganizations involved –Princeton University –Illinois State University –Public Works Canada –Commonwealth Edison Company A Prototype was Successfully Tested in 1980A Prototype was Successfully Tested in 1980

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 7 History Theodore Taylor later opened NOVA Inc.Theodore Taylor later opened NOVA Inc. –Developed Several Commercial Ice Ponds An Automated Ice Pond was Built by Japan in the Late 90’s to Cool ProduceAn Automated Ice Pond was Built by Japan in the Late 90’s to Cool Produce Presently Dalhousie Mechanical Engineering Students Studying the Potential of Ice PondsPresently Dalhousie Mechanical Engineering Students Studying the Potential of Ice Ponds

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 8 Limitations Requires Extra Land AreaRequires Extra Land Area Susceptible to PermafrostSusceptible to Permafrost Depends Heavily on Climate ConditionsDepends Heavily on Climate Conditions Conventional Cooling Systems Control Humidity, Ice Pond Refrigeration Does Not.Conventional Cooling Systems Control Humidity, Ice Pond Refrigeration Does Not.

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 9 Benefits Can Increase COP by 40% (Japanese System)Can Increase COP by 40% (Japanese System) –Uses 70% of Conventional Energy Requirements Requires only 1/20 the Land Area of LoadRequires only 1/20 the Land Area of Load Environmental BenefitsEnvironmental Benefits –No Refrigerants Used –Reduction of Greenhouse Gas Emissions

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 10 Questions?

5/10/2004Chilled Engineering Systems Ice Pond Refrigeration 11 Thank you!