Refrigeration is a process in which work is done to move heat from one location to another. The work of heat transport is traditionally driven by mechanical work, but can also be driven by heat, magnetism, electricity, laser, or other means. Refrigeration has many applications, including, but not limited to: household refrigerators, industrial freezers, cryogenics, and air conditioning.
Refrigeration Van System
Creating a refrigeration van system requires a sealed atmosphere. The first step is to insulate the compartment with high-density polymer foam and seal it, resulting in a heat-resistant environment. The next step is to remove the rest of the heat from inside the compartment, which is achieved using a system made up of three parts: a condenser, a compressor, and an evaporator.
How It Works
The condenser is a metal pipe twisted into an intricate shape, which is then filled with coolant fluid. The fluid flows around the pipe, absorbing all the heat in the compartment. The heat causes the coolant to convert into a gas form, which is then transferred into the condenser.
The condenser compresses the gas under extreme pressure. This pushes the molecules of the gas together, making it similar to aerosol gas. This condensed gas is placed into the evaporator, where air from outside the compartment passes through the high pressure gas. This process releases the heat outside the compartment and depressurizes the gas, which then goes back into the condenser for the cycle to repeat itself. The continuous repetition of this cycle causes the temperature inside the compartment to drop even lower.
What to Consider in a Refrigeration Van System
The type of goods to be transported determines the temperature at which the compartment will be kept. Ice cream needs to be transported at -25℃, frozen raw meat at -10℃, and fruits and vegetables at 4-8℃. It is also important to take into account the ambient, or surrounding, temperature, and how often the compartment door is opened. All cargo must be kept at an appropriate temperature, as botched deliveries could drive up operational costs.
Most van refrigeration van units place the condenser on top of the van, while trucks usually have front-mounted condenser units. Some refrigeration van units rely on the vehicle to generate power for the cooling system to work. This is unsuitable for long distance transportation. Diesel engine truck refrigeration van units have their own diesel-powered cooling systems, allowing the cooling process to continue even after the truck’s engine is turned off. It is also important to have a standby or backup power system for whenever the cargo needs to be kept for a long period of time, or during stopovers.
The type of door for the compartment depends on the type of delivery. The two most common types of doors are roll-up doors and hinge doors. Roll-up doors are good for one-time deliveries. This is because roll-up doors allow a large quantity of cold air to escape at a time, creating an insulation deficit that requires more energy to fill. This places extra stress on the refrigeration van system, unless a power interrupt switch is incorporated into the refrigeration van unit to control the loss. Hinged doors are better at maintaining insulation over time, and, as such, are good for multiple deliveries.
Browse through our stock of Renault, Mercedes-Benz, Vauxhall, Peugeot, Toyota and Ford refrigerated vans at Glacier Vehicles to choose which one of our refrigerated van best suits your needs.