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Model TR-200 small truck refrigeration unit Type chiller & freezer system Applied for 6m³ - 15m³ box volumes or 2m small refrigerated trucks Refrigeration capacity 2,200W Temperature range -18&#; to +30&#; Usage used to transport frozen or fresh cargoesMedium Truck Refrigeration Units ( frozen: -20&#; to 30&#; )
TR-350 TR-450 TR-550 15~25m³ medium refrigerated trucks 18~25m³ container volumes 20~30m³ refrigerated truck bodies 4.2m refrigerated trucks 4.5m 5.5m W cooling capacity W W front mount front mount front moun or undermount used to transport frozen or fresh goodsLarge Truck Refrigeration Units ( frozen: -20&#; to 30&#; )
- (8.6m length refrigerated trucks)
TR-960 Refrigeration Unit for Truck- (9.6m length refrigerated trucks)
The Difference Between Direct Drive and Diesel Drive Truck Refrigeration Units
Composition structure of truck refrigeration unit
How do Truck Refrigeration Units Work?
Truck Refrigeration Unit Maintenance
As the best truck refrigeration unit manufacturer in China, Guchen Industry supplies 3 models of meidum-size truck freezer systems: TR-350, TR-450, and TR-550 unit. No matter what your truck volume is, you can always find a suitable refrigeration unit at Guchen.Need any assistance? Please mail to TR-600 truck freezer units are suitable for high temperature up to 50&#;, with W cooling capacity at 0 &#;, can make temp. range from -30 to 30&#; to keep foods frozen or fresh, applying in 30~40m³ big refrigerated truck bodies.With W cooling capacity, TR-650 vehicle refrigeration units are suitable for lager refrigerated truck bodies with 22-35 m³ volume and 6.5m truck bodies&#; length.TR-760 transport refrigeration units have W cooling capacity, which can make 35-45 m³ refrigerated truck bodies temperature down to -20&#;. With condenser front mounted or under mounted, suitable for most of truck conditions with 7.6m length.TR-860 refrigerator unit for truck is suitable for 40-50 m³ refrigerated truck bodies, with W cooling capacity, can make 8.6m length truck container temperature range from -20&#; to 30&#; on the road.TR-960 refrigeration unit for truck with the biggest cooling capacity ( W) in Guchen&#;s direct engine driven refrigeration units, which are able to make 60m³ refrigerated truck box with 9.6m length temperature down to -20&#; on the road.The main difference between direct-drive and diesel-driven truck refrigeration units is how they are powered.Direct-drive truck refrigeration units are powered by the truck engine. These units are usually integrated with the truck's existing engine and use the engine's power to run the refrigeration system. Here are some key features:Power source: The direct drive is connected to the truck's powertrain and uses the mechanical energy of the engine to drive the refrigeration compressor and other components.Fuel consumption: Direct drives get their power directly from the truck's engine, which means they consume fuel from the truck's tank. The fuel efficiency of a truck engine directly affects the efficiency of the refrigeration unit.Cooling performance: Direct drive units typically have excellent cooling due to the power provided by the truck engine. They are ideal for refrigerated car boxes that require high cooling capacity and frequent door openings.Diesel-powered truck refrigeration units, also known as self-contained units, have their own separate diesel engine powering the refrigeration system. Here are the main features:Power source: Diesel drives have their own dedicated diesel engine, usually mounted on the front or side of the truck. These engines drive the refrigeration system independently of the truck engine.Fuel Consumption: The diesel drive has its own fuel tank and consumes diesel to power the refrigeration system.Cooling Performance: Diesel-powered units offer strong cooling performance and are often preferred for long hauls or where the truck engine may be shut down while remaining cool.Flexibility: Diesel drives offer flexibility as they can operate independently of the truck engine. This allows the refrigeration system to continue running even when the truck engine is not running or during breaks.The following are key components commonly found in truck refrigeration units:A compressor is an important component that circulates and compresses refrigerant gas, increasing its pressure and temperature.The condenser is responsible for releasing the heat of the refrigerant. It is a heat exchanger that helps transfer heat from high-pressure refrigerant to the surrounding environment.The evaporator is another heat exchanger located inside the cargo area of the truck. It absorbs heat from the cargo, cooling it down.An expansion valve, also known as a thermal expansion valve or a metering device, regulates the flow and pressure of refrigerant. It is located between the condenser and the evaporator.A refrigerant is a working fluid that undergoes a phase transition from gas to liquid and back to gas during the refrigeration cycle. It is responsible for absorbing and releasing heat, allowing the cooling process to take place.The Control Panel contains the control and monitoring system for the cooling unit. Includes a variety of switches, buttons, and displays that allow operators to set and adjust desired temperatures, monitor system performance, and receive alerts or alerts of any problems or deviations.The airflow system ensures proper circulation of cool air within the cargo area. Includes fans, ducts, vents and baffles to evenly distribute cooling air throughout the cargo compartment.Truck refrigeration units are often enclosed in an insulated enclosure or compartment to effectively reduce heat transfer between the interior and exterior environment.These components work together to create a refrigeration cycle that extracts heat from the cargo area and releases it to the surrounding environment, maintaining the temperature needed to transport perishable goods.Truck refrigeration units work on the principles of thermodynamics and the refrigeration cycle. A refrigeration cycle involves transferring heat from one area to another using a refrigerant as the working fluid.The compressor draws low-pressure refrigerant gas from the evaporator and compresses it, increasing its pressure and temperature.The refrigerant gas then flows into a condenser located outside the cargo area. In the condenser, the hot refrigerant gas is cooled by transferring heat to the surrounding environment.An expansion valve is a small orifice that restricts the flow of refrigerant, causing a drop in pressure and temperature. This allows a mixture of liquid and gas to enter the evaporator.As the low-pressure refrigerant mixture expands in the evaporator, it absorbs heat from the cargo and the surrounding air. This process cools the cargo area as the refrigerant evaporates into a low-pressure gas.The low-pressure gas is then drawn into the compressor to start the cycle again. The compressor increases the pressure and temperature of the refrigerant gas, starting a new refrigeration cycle.Throughout the cycle, the components of the truck refrigeration unit work together to extract heat from the cargo area and release it to the outside environment, maintaining the desired temperature inside the truck.The heat transfer and phase change process of the refrigerant is repeated to provide the desired cooling effect. The temperature control system in the unit monitors the temperature in the cargo area and adjusts the operation of the compressor and other components to maintain the set temperature.The actual refrigeration system in the truck unit may have additional components, sensors, and controls to ensure efficient and precise temperature control.Proper maintenance of your truck refrigeration unit is critical to ensuring its reliable operation and peak performance. Regular maintenance helps prevent breakdowns, prolongs the life of equipment, and maintains the temperature control needed to transport perishable goods.Perform routine visual inspections of equipment for any signs of damage, leaks, loose connections, or worn components. Check for oil leaks, refrigerant leaks, loose belts, damaged wiring, and any other visible problems. Address these issues promptly to prevent further damage.Keep the refrigeration unit clean inside and out. Remove any dirt, debris, or built-up grime from unit components, including the condenser, evaporator, fan, and air filter.Check and clean the filter regularly to ensure proper airflow and prevent contamination of the evaporator coil.Check the lubrication needs of unit components such as compressors and fan motors. Lubricate moving parts as recommended to reduce friction, prevent premature wear, and maintain smooth operation.Monitor refrigerant levels regularly to ensure they are within the recommended range. A low refrigerant level can affect cooling performance and may indicate a leak in the system.Check the electrical connections, wiring, and control panel for any signs of damage, corrosion, or loose connections.
Mar 04,
The Five Different Types of Transport Refrigeration Systems
At present, there are five types of refrigeration systems widely used in road transport refrigeration, which includes
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The five types of refrigeration systems have many differences. To help you better understand every system,has broken down each one in some summaries below.
Chilled-water refrigeration
At atmospheric pressure, the melting point of ice is 0&#;. If the temperature below 0 degree Celsius is required, then the mixture of ice and salt is used. Salt lowers the melting point of water, which means that the more salt being added in the ice water within a certain range, the lower the melting point would be. It was proved that when you add salt whose quality equals to 29% of that of the ice water to the ice water, the melting temperature of the ice will be lowered down to the lowest value of -21.2&#;.
In refrigerated transport, ice water with different salt content is selected in accordance with the required temperature of the refrigerated goods. For example, using salt ice water with a salt content of 22%, the temperature in the compartment can be maintained at -18&#; to -13&#;.
Benefits: Chilled-water refrigeration system has low investment and low operating cost.
Drawbacks: Ice water is with relatively smaller latent heat absorption compared with the rest, therefore chilled-water refrigeration system has limited effect on the cooling of vehicle compartment. In addition, the mixture of salt and ice will pollute the environment/refrigerated food, corrode the carriage and damp the cargo.
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Conclusion: chilled-water refrigeration system is mainly used for refrigerated transportation of fish and other aquatic products.
Dry Ice Refrigeration
Benefits: Dry ice refrigeration system is with low operating cost, simple design, and convenient to use. The low temperature and direct sublimation to a gas makes dry ice an effective refrigeration system.
When compared with chilled-water refrigeration, it can not only obtain a lower temperature, but also a larger cooling capacity. Therefore, the dry ice refrigeration method is suitable for frozen food transportation.
Drawbacks: The CO2 gas produced by the sublimation of dry ice can inhibit the reproduction of microorganisms, slow down the oxidation of fat and weaken the respiration of fruits and vegetables.
However, dry ice sublimation can easily cause frosting; too much CO2 gas will cause breathing difficulties and necrosis of refrigerated goods such as fruits and vegetables;
Besides, the temperature in the compartment is difficult to adjust; the cost of dry ice is high and the consumption is large, so it is less practical.
Cold Plate Refrigeration
Before transporting the goods, cold plates are pre-chilled, to make the refrigerant freeze. During refrigerated products transportation, the chilled refrigerant in the cold plates melt and absorb heat from the environment, thus keeping commodities at proper temperatures.
Structurally, cold plate refrigeration system is divided into integral type and split type.
In integral system, the power unit, cold plates and refrigeration unit are all placed on the refrigerated vehicle.
In split system, there is only refrigeration unit and cold plates. When parking, the power system drives the refrigeration unit to freeze the cold plates.
The commonly-used refrigerant is salt brine/eutectic solution whose melting point is usually about 10&#; lower than the temperature in the compartment. The components of the eutectic solution should be changed according to the desired temperature of transported goods.
Disadvantage: The cold plate device itself is heavy and large in size, occupying a certain volume of the carriage. And the traditional cold plate systems hold the body&#;s temperature during daily delivery runs of 8-15 hours.
Conclusion: cold plate refrigeration method is best suitable for short- to medium-distance refrigerated transportation in light or medium trucks.
Liquid Nitrogen Refrigeration
The system is to use liquid nitrogen vaporization to absorb heat from the compartment, to cryogenically chill food. Under atmospheric pressure, the boiling point of liquid nitrogen is -196&#;, and the latent heat of vaporization is 200kj/kg. The specific heat of nitrogen is 1.05J/g K. When every kilogram of liquid nitrogen is vaporized and heated to -20&#;, the absorbed heat is about 358kj. Liquid nitrogen has a low boiling point and is a by-product of oxygen production, so it has been widely used.
The liquid nitrogen refrigeration device has a simple structure, reliable operation, no noise and pollution; liquid nitrogen has a large refrigeration capacity, rapid refrigeration, and is suitable for quick freezing. Liquid nitrogen vaporization will not make the compartment damp, and nitrogen is good for keeping food fresh. In addition, liquid nitrogen refrigeration has precise temperature control (+/-2&#;). However, the cost of liquid nitrogen is high, and it needs to be charged frequently, so its promotion is subject to certain restrictions.
Mechanical Compression Refrigeration System
road transport refrigeration systems
Due to factors such as transport distance & time, supporting facility and running cost, mechanical refrigeration is the most widely used refrigeration cycle method among all the 5 different types of
The main reason for the widespread use of mechanical refrigeration equipment is that the refrigeration unit can provide great refrigeration performance and with heating option, which significantly extends the application scope.
truck reefer units
Compartment temperatures can be automatically and accurately adjusted. Takingfor example, its temperature range is +30&#; to -30&#; which can be used for various refrigerated goods transportation.
cold chain industry
Although mechanical refrigeration systems are with relatively complicated structures and high purchase/operation costs, it is still the most reliable and effective refrigeration method used in worldwide
Contact us to discuss your requirements of Truck Electric Refrigeration Units. Our experienced sales team can help you identify the options that best suit your needs.