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Loading Dock Equipment
Cooldock (ISO-Loadhouse)
   Categories: Loading Dock Equipment
   published and updated: 17. February 2021

What is COOLDOCK doing?

The Nani COOLDOCK is the most energy-efficient truck loading system, which it is currently available on the market. The loading house is highly insulated as a “box” designed, which is set just in front of the building opening. Truck and dock with closed rear doors and they are only opened after the truck has already been sealed. Then the docked trucks are 4-sided round sealed and the energy loss is limited as a maximum.
functional model ot the COOLDOCK loading lockfunctional model ot the COOLDOCK loading lock
The placement of the loading lock in front of the building saves cost-intensive interior space. The exact technical design is adapted to the existing building or, if a new building is built, to the requirements of the customer.
Cooldock open side viewCooldock open side view


The 11 components of the COOLDOCK:

1. stepped steel plateau (dockleveller with feed)
2. High-speed freezer door
3. ISO-FloorPanel
4. front steel construction
5. hydraulic crash guard with quiver foundation
6. thermo sectional door
7. four-sided inflatable Dockshelter
8. electronic wheel wedge and master control
9. traffic light
10. ISO-panels
11. drive-in aids


more detail views:


11 Components from reference objects:


more detail views:



Nani COOLDOCK – new features compared to conventional loading locks

1. Docking with closed hedges
2. Complete isolation of the built-in-front lock; sectional door closes in front of the dockleveller
3. drvie down ability with loading shelf walls
4. no impact forces by putting through into quiver foundation in the building
5. less energy loss and drafts inside the building
6. vewer insects and vermin inside the building
7. Improvement of noise protection
8. interruption of the loading process without shunting the truck
9. loading directly into the freezing zone, on pre-zones can be dispensed with

Verladung mit VorzoneVerladung mit Vorzone
Verladung ohne Vorzone mit COOLDOCKVerladung ohne Vorzone mit COOLDOCK
10. Usually no dehumidifier is necessary
11. automatic function process guarantees safe loading and securing for the next loading: protection against damage to the gates and façade
11. The inside of the rear doors is not polluted by door seals


The steps of loading

1. The place of loading is closed
No truck there – Dockleveller in the rest position – Gate closed – Crash Guard protection in the safety position – Gate seal is vented
2. The truck is docked and is detected by a sensor which switches the system on and off
Traffic light outside flashes red after 20 seconds
3. Truck driver secures the truck with the electronic wheel wedge
The sectional door is opened by pressing the button in self-locking mode. Right before the door seal is automatically inflated. The gate opens with a time delay. The crash guard protection is lowered at the push of a button in the loading position. The rear doors are opened and secured by the open door obove the loading bridge. The loading bridge is put on. When the feed is extended and is lowered to the truck loading area, the lower air bag is automatically inflated.
4. The loading takes place
The traffic light is switched to red. The indoor traffic light is green. The forklift truck starts loading.
5. The loading is finished
The loading bridge is moved to rest position by pushing the relevant button. Before the laoding bridge rises with a delay, the door seal is automatically switched off and deaerated. After reaching the rest position, the rear doors of the truck are closed. The sectional door is closed by pushing the button, meanwhile the door seal is automatically switched off and deaerated. The outer traffic light flashes red.
6. The electronic wheel wedge is being removed
7. The truck moves out of the loading position and the crash guard protection automatically moves into its safety position.
The traffic light switches to green.


Implementation of different COOLDOCKs



The COOLDOCK can also be designed for applications in which the loading and unloading of trucks of different heights must be possible and where the slope of the adjustment ramp may not be too high (for example, a hand truck is being loaded or there is a risk that if the truck is loaded too fast, the truck is tilted by the forklift truck). The following figures show an application in which such a loading lock is set before an existing loading ramp and the existing loading bridge pit is used.
Continuous Upper-Curtain Shelter

Inflatable Dockshelter
Four-Sided Inflatable Dockshelter
Loading House
Insulated Loading House
Explanation of the experimental setup

Comparison of conventional Loading Docks with the COOLDOCK

Three types of docking modules were compared in a simulation model by an independent climatic engineer for thermal building physics: P-TAD-2, A-TAD-2 and A-TAD-U-2. Three cold stores were compared with one another. Each hall was provided with six docking stations. All thermal processes in the docking station during, before and after the unloading process from the truck transport area via the loading ramp into the interior of the deep-freeze warehouse were simulated over a period of one year. The aim was to determine the energy flows for the cooling capacity and the dehumidification required in conventional systems.

The following table is intended as an example of the various concepts. For one
Realization of the stated values cannot be guaranteed.
* Reference weather data set Germany 2011

Infiltration surfaces
Air inflow and heat input
approx. 55%
of the door cross-section
approx. 35%
of the door cross-section
approx. 5%
of the door cross-section
Air Exchange reducing internal
Air exchange between trucks, ramp cold store
10 % to 20 %
40 % to 50 %
Volume Flow 1
Air exchange between the truck dock hall
approx. 800 l/s
approx. 700 l/s
approx. 450 l/s
Heat Input2 Air exchange between the truck dock hall per dayapprox. -12 kW
approx. -9 kW
approx. -2 kW
average Air Temperature 3 (hall)
Temperature fluctuation in summer
Temperature fluctuation in winter
-23,5 °C
5-6 K
10-12 K

-24,5 °C
3 K
5-6 K
-25,5 °C
0-1 K
0-1 K

possible final energy savings
for cold supply and freeze protection
0 %
approx. 5-10 %
approx. 15-25 %
U-Values4 - Isopanels
40mm profile
80mm profile
0,30 / 0,24
80mm profile / 100mm profile
Dehumidifier to prevent the icing of the ramp (depending on rest of the building and the docked Truck)requiredrequiredusually not required
1 The Volume Flow indicates how much volume of a medium is transported through a specified cross-section per period of time.
2 The Heat Input indicates how much thermal energy is transferred from one body to another. Heat always flows
from a place of higher temperature to a place of lower temperature.

3 The Air Temperature is the temperature of the atmosphere close to the ground that is not affected by solar radiation or by soil heat or by heat conduction.
4 The U-Value is therefore a measure of the “thermal permeability” or the thermal insulation properties. The U-Value indicates the heat that per hour and
square meters of space is lost if the temperature difference between inside and outside is one degree celsius. The smaller the U-Value, the more
better are the insulation properties.

Industry: Coldstore Logistics, Construction Logistics
State: Saxony-Anhalt
Year of construction: 2012
Industry: Coldstore Logistics, Frozen Food Logistics, Food Logistics
State: Saxony
Year of construction: 2011
Industry: Meat Products Logistics, Coldstore Logistics
State: Mecklenburg-Vorpommern
Year of construction: 2011

Produktvideo: NANI - Cooldock - Construction & Design
Content (TOC): 


1. Plateau with feed
2. Deep-Freeze-High-Speed-Door
3. ISO-FLoorpanel
4. Scaffolding
5. Hydraulic crash guard protection with quiver foundation
6. Thermo-sectional-door
7. Four-sided inflatable dockshelter
8. Electronic wheel wedge and control
9. Traffic light system
10. ISO-Panels
11. Drive-in aids


Product-Video:  NANI - Cooldock Loading - operation (Part 2/2)
Inhalt (TOC): 


1. Turn on the Coolingdock on the master control
2. Detection of the truck by light button
3. Green traffic light - ready for loading
4. Docking of the truck to hyraulically height-adjustable crash guard protection
5. Redirect of the impact forces by quiver foundation
6. Control is released by applying the electronic wheel wedge
7.Press the "Open Door"-button
8. Three sides of the truck are sealed
9. Sectional door opens
10. Crash guard protection is driven downwards
11. The doors of the truck are opened inwards
12. Inserted dockleveller and sealed air bag from below
13. Temporarily suspend or interrupt loading
14. Continue loading
15. Stop loading
16. Truck leaves loading point
17.Crash guard moves to protection position
18. Credits




How to find us

Nani Verladetechnik GmbH & Co.KG
Siegerslebener Str.12
39365 Eilsleben

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Phone: +49 (0) 39409 - 914 0

Fax: +49 (0) 39409 - 345

E-mail: info[at]nani.de