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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 [email protected] (208)991-5961Robert Spence Sales Manager [email protected] (208)991-5959