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A refrigerator truck or chiller lorry (also called a reefer), is a van or truck designed to carry perishable freight at low temperatures. Most long-distance refrigerated transport by truck is done in articulated trucks pulling refrigerated hardside (box) semi-trailers , although insulated curtainsiders are common in some countries.
Dry cooling towers (or dry coolers) are closed circuit cooling towers which operate by heat transfer through a heat exchanger that separates the working coolant from ambient air, such as in a radiator, utilizing convective heat transfer. They do not use evaporation and are air-cooled heat exchangers.
Full-size intermodal containers equipped with these "cryogenic" systems can maintain their temperature for the 30 days needed for sea transport. [4] Since they do not require an external power supply, cryogenically refrigerated containers can be stored anywhere on any vessel that can accommodate "dry" (un-refrigerated) ocean freight containers.
Designed as an entire family of trucks, only the semi-tractor and cargo/prime mover were built. 392 M123 were built between 1955 and 1957 and 552 M125 were built between 1957 and 1958. In 1965 CONDEC began building 3188 diesel powered M123A, Mack began building 420 in 1968.
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.
Later, manufactured ice was used, but this rapidly gave way to other means of cooling; the simplest was the substitution of normal (water) ice by dry ice. With the increasing reliability of combustion engines, engine-powered refrigerator vans emerged. There are even vans whose cooling is achieved by the evaporation of liquid gas.
Medium trucks are larger than light but smaller than heavy trucks. In the US, they are defined as weighing between 14 001– 26 000 lb (6 351– 11 793 kg). In North America, a medium-duty truck is larger than a heavy-duty pickup truck or full-size van. Some trucks listed as medium also are made in heavy versions. Box truck; Van; Cutaway van ...
International 9400i tow truck For 2000, International introduced the third generation of its Class 8 highway trucks, distinguished by an "i" suffix. Previewed by the 1997 update to the 9200/9400 and the 1999 introduction of the 9900, the redesign was the most extensive update since the 1971 introduction of the model range.