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Refrigerator trucks can be cooled with ice, dry ice, liquid carbon dioxide, or mechanical refrigeration systems (transport refrigeration units, TRUs) powered by small displacement engines or by the truck's main engine. [4] They are often equipped with small "vent doors" at the rear and front of the trailer.
In order to further expand storage capacity, some trucks, typically called stinger units, are equipped with an "overhead" — an extra storage space mounted above the truck cabin which is accessible via the top ramp of a car carrier trailer. Up to 3 vehicles can be loaded on the truck: one on the roof, and two over the 5th wheel/drive tires. [3]
Truckload shipping is freight transport in which a semi-trailer or intermodal container is filled entirely with one type of cargo. It differs from less-than-truckload shipping (LTL) in which freight from multiple customers is combined in one trailer. A truckload carrier is a trucking company that contracts entire trailer-load to a single customer.
The Santa Fe Refrigerator Despatch (SFRD) briefly experimented with dry ice as a cooling agent in 1931. The compound was readily available and seemed like an ideal replacement for frozen water. Dry ice melts at −109 °F or −78.33 °C (versus 32 °F or 0 °C for conventional ice) and was twice as effective thermodynamically.
Some reefers are equipped with a water cooling system, which can be used if the reefer is stored below deck on a vessel without adequate ventilation to remove the heat generated. [ 2 ] Water cooling systems are more expensive than air current ventilation to remove heat from cargo holds, and the use of water cooling systems is declining. [ 1 ]
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A trailer between 26 feet (7.9 m) and 29 feet (8.8 m) long that can be used singularly as a delivery trailer in congested areas or in combination with another trailer for over the road. [10] [45] A standard dry van trailer Dropdeck A flatbed with a lowered deck, featuring a raised step at the front, where the trailer attaches to the fifth wheel ...
The 40-foot-long trailer, chilled to 20 degrees Fahrenheit, is a more than $200,000 investment by team owners David and Nicole Tepper and the Panthers’ organization.