Infiltration Reduction Vestibule (IRV) PAT. PENDING

Minimizing Infiltration Into Refrigerated Spaces

Project ObjectiveSignificantly reduce heat and/ or moisture infiltration

Into freezer Caused by conveyor/ forklift systems

Secondary objectives Reduce energy waste Increase productivity/ decrease down time Save labor and material

Reduced maintenance labor Eliminate excessive defrost cycles

Improve product quality Reduce product loss

Resulting IssuesInfiltration into causes: Excess energy consumption Additional maintenance cost Problems achieving required temperature

Additional equipment purchases Adverse product quality effect

Product contamination from frost

Increased Energy Use Infiltration causes up to 50% of total heat

load on typical refrigeration system

Increased Refrigeration

Load

Decreased Ability to

Maintain temp

Drastically increased electricity expense*

The increases can be accurately calculated

Maintenance and Labor Cost Defrost Cycles are expensive

Energy Labor

Frost Buildup More frequent defrost cycles needed Reduces overall freezer system capacity

Decreased air flow through the coils Insulating effect Parasitic heat load

Associated costs Hard to calculate Vary depending on many factors

Specific facility, Type and age of equipment Defrost method used.

Food Safety & Quality Failure to maintain temp can cause

Product safety concerns Product quality issues

Reputational concerns Loss of product

Additional Costs Wasted product

Frost falling into/ onto product or packaging

Reduced/ restricted production Safety hazards

The Cold Chain Solution

Infiltration Reduction Vestibule (IRV) Modular three chamber vestibule Uses venturi effect to create air barrier Vacuum offsets the pressure differential between

two environments Multiple airlocks impede airflow between

chambers System dynamically adjusts vacuum pressure

using feedback based control loop Eliminates warm air infiltration while minimizing

exfiltration of refrigerated air

Still of flow simulation

IRV’s Features Modular design for easy install and removal

for cleaning/ maintenance Stainless steel construction for food grade

applications High R-factor insulation between chambers

and environment Long-life/ high efficiency brushless motor

reduces operating cost

Cold Chain’s IRV System

Engineered Solution Install Cold Chain’s IRV*

@ opening IRV Creates “reverse

vacuum” suction Lowers pressure inside

freezer Located outside freezer*Patent Pending

* Patent Pending

* Patent Pending

Previous Success Spiral IRV on Tot line

Reduced infiltration by 90%

Capacity increase of 22%

Previous Success

Potato Processing into Freezer Bulk dump Significant frost

infiltration IRV eliminated

infiltration Decreased temp by

23oF

Previous Success

Potato Processing into Freezer Add Back Conveyor Significant frost

infiltration (notice heat on image)

IRV eliminated infiltration Decreased temp by

34oF (yellow indicates warm hydraulic lines)

Previous Success

Packaging Conveyor Significant frost

impeding product flow IRV eliminated

infiltration Decreased temp by

28oF

Thermal Imaging Performance Results

Thermal Imaging Examples

These pallet conveyors inside a -10o F cold storage freezer are fitted with high speed roll up doors.

Thermal imaging shows that the low R-value and poor perimeter seal of these high speed roll-up doors allows large amounts of 72o F/ 80% humidity infiltrating air.

For more information contact:

Dan Aragon Director of R&D daragon@coldchainllc.com (208)991-5961Robert Spence Sales Manager Rspence@coldchainllc.com (208)991-5959