Entrance Requirements for Cold / Refrigeration Storage

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Entrance Requirements for Cold / Refrigeration Storage

Entrance Requirements for Cold / Refrigeration Storage
  • Insulation

    Lower thermal transmittance coefficient, higher insulation performance.
    Higher insulation performance, less energy consumption.

    Thermal transmittance coefficient is low at metal shutters and materials with simple structures,
    but gets higher at doors especially by metal seams, front/rear side of rail, and top/bottom spaces.

    That's why guaranteed airtight sealing and insulation are recommended for the door structure.

  • Speed

    Ambient air shut-off is one of the most important door functions.

    This function is maximized by the door's opening/closing speed.

    Doors with higher speeds have better shutting-off performance.

  • Safety

    Doors with frequent access always have hazards of collision, fall, malfunction, etc.

    For cold or refrigeration storage, damage to just one or two doors is very fatal as the number of entrances is minimized to maintain temperature.

    For this reason, manually-operable double doors are recommended at most cold/refrigeration storage facilities.

    Those doors should maintain temperature but also provide a spare door in case the other one of the pair can’t be operated.

Sealing effect
  • * Every sealing equipment has a gap.
Comparison of the module and the standard dock
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Module Dock General Dock
Door applied Spiral door, Speed door 75 mm overhead door
Form of door Double door that reaches inside and outside Single door
Outer sealing Specially-made seal Dock seal, dock shelter
Reinforcement for sealing Air ventilating equipment within module dock  
Durability Anti-corrosive and semi-permanent material Requires periodical replacement due to corrosion by condensation
Cost due to cool air loss KRW 300,850/year KRW 3,417,150/year
Total cost due to loss KRW 7,220,400 (for 24 doors) KRW 82,011,600 (for 24 doors)
Production method Manufactured at the factory before installation by module At-site installation
* Cost due to cool air loss is calculated based on R-value and energy cost simulation related to the door structure (US standard).
Detailed cost calculation on cool air loss
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Module Dock General Dock Note
Temperature in refrigeration storage 0℃ 0℃
Outer temperature 15℃ 15℃ Yearly mean temperature in Korea applied
Door size W 2,400 × H 2,400 W 2,400 × H 2,400 Cold container
Work days per week 6 days 6 days
Work hours per day 8 hours 8 hours
Number of door uses per day 30 30
Thermal transmittance coefficient (W/㎡. K) 0.5 1.3
Sealing effect (%) 99 75
Yearly power consumption (kWh) 2,384 24,768
Outer risk Impact
Cold air during winter Increase in energy consumption by heater operation
Hot air during summer Increase in energy consumption by cooling device operation
Humid/dry air Condensation
Fine/yellow dust Damages on product
Insect Damages on product
The door is the most dynamic structure in the building
Not only human and products access doors.
  • Company Name : INPACKGLOBAL CO.,LTD.CEO : Park Young SeokBusiness Number : 609-81-69988
  • Address : 59, Hagye-ro 138beon-gil, Jinyeong-eup, Gimhae-si, Gyeongsangnam-do, Republic of KoreaTel : +82-55-298-2623Fax : +82-55-298-2924E-mail : sales@inpackglobal.com
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