5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

1

Chilled Engineering SystemsChilled Engineering Systems“Engineering with Nature”“Engineering with Nature”

Ice Pond RefrigerationIce Pond Refrigeration

Derek BrittenDerek BrittenRoger ConnollyRoger Connolly

Ben FrancisBen FrancisAdam TrudeauAdam Trudeau

Steve VinesSteve Vines

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

2

OutlineOutline

• OverviewOverview

• HistoryHistory

• LimitationsLimitations

• BenefitsBenefits

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

3

OverviewOverview

• 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)

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

4

OverviewOverview

• System ComponentsSystem Components– Watertight Reservoir (Ice Pond)– Ice Making System– Cooling System– Load

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

5

HistoryHistory

• Winter Ice Storage for Summer Cooling Dates Winter Ice Storage for Summer Cooling Dates Over 2000 YearsOver 2000 Years– Used for Food Storage– Ice Insulated by Organic Waste– Still Used Globally

• Water Spray Ice Making Patented in the US in Water Spray Ice Making Patented in the US in 18361836

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

6

HistoryHistory

• Ice Pond Refrigeration Research Began in the Ice Pond Refrigeration Research Began in the late 70’s 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

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

7

HistoryHistory

• 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 An Automated Ice Pond was Built by Japan in the Late 90’s to Cool Producethe Late 90’s to Cool Produce

• Presently Dalhousie Mechanical Engineering Presently Dalhousie Mechanical Engineering Students Studying the Potential of Ice PondsStudents Studying the Potential of Ice Ponds

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

8

LimitationsLimitations

• 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 Conventional Cooling Systems Control Humidity, Ice Pond Refrigeration Does Not.Humidity, Ice Pond Refrigeration Does Not.

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

9

BenefitsBenefits

• 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

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

10

Questions?Questions?

5/10/2004 Chilled Engineering SystemsIce Pond Refrigeration

11

Thank you!Thank you!