
For companies that regularly transport cold shipments, understanding and managing reefer fuel usage is critical. Reefer fuel is designed to run the refrigeration units attached to reefer trailers to ensure the cargo remains at the right temperature even when the truck isn't running. Modern reefer units use between 0.4 and 1.1 gallons of diesel per hour of engine runtime, but older trailers can use between 1 and 3 gallons per hour. This article will explore how much fuel a Thermo King reefer uses and how to manage its fuel usage.
| Characteristics | Values |
|---|---|
| Fuel tank size | 50 gallons |
| Fuel type | Diesel |
| Fuel consumption | 0.4-1.1 gallons of diesel per hour of engine runtime |
| Fuel-saving features | Automatic mode, QuickTemp technology, Cycle Sentry mode, ThermoLite solar panels |
| Fuel usage factors | Temperature setpoint, age of trailer, size of load, maintenance |
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What You'll Learn
- Thermo King's T-90 Series offers faster pull-down, faster recovery, and less fuel burned
- Fuel usage depends on the temperature inside the trailer
- Modern reefer units use 0.4-1.1 gallons of diesel per hour
- Automatic mode reduces fuel consumption and engine runtime
- Reefer fuel is designed to run refrigeration units when the truck isn't running

Thermo King's T-90 Series offers faster pull-down, faster recovery, and less fuel burned
Thermo King, a provider of transport refrigeration solutions, has introduced the T-90 Series of truck transport refrigeration units (TRU) with standard integrated telematics hardware. This hardware easily connects fleets with their cargo, allowing them to monitor, control, and analyze their refrigerated fleet operations effectively.
The T-90 Series offers faster temperature pull-down, faster recovery, and reduced fuel consumption compared to competitive units. Specifically, it boasts up to 50% quicker temperature pull-down and up to 30% faster recovery time after door openings. Moreover, the T-90 Series burns up to 48% less fuel during pull-down to the set point and up to 35% less fuel throughout a full day of use.
The improved performance of the T-90 Series is attributed to its latest reciprocating compressors, enhanced coil designs, and optimized engine management, resulting in a 35% increase in cooling capacity. The T-90 Series also includes the T-90 MAX models, which deliver industry-leading refrigeration capacity with larger coils and heat exchangers, optimized compressor and engine speeds, and a sound-reduction kit for quieter performance.
The T-90 Series provides lower maintenance costs and better fuel efficiency, ensuring that fleets can uphold the quality of their cargo while reducing operational expenses.
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Fuel usage depends on the temperature inside the trailer
The Thermo King T-90 Series of self-powered truck refrigeration units offers industry-leading capacity and reliability, with faster pull-down and recovery rates, resulting in less fuel burned and fewer engine run hours. The T-90 Series features the latest Thermo King-designed reciprocating compressors, which offer improved reliability and performance.
Thermo King's QuickTemp technology has been shown in tests to reduce fuel consumption by up to 35% compared to competitors, while also improving cargo temperature control and extending unit life. Additionally, Thermo King's Cycle Sentry mode helps to improve fuel savings by matching temperature set points and ranges to the specific needs of the cargo.
The temperature inside the trailer can also be managed by using the automatic mode. This mode reduces fuel consumption and engine runtime by shutting off the system when the temperature inside the trailer reaches the set point. The system then automatically restarts when the temperature rises above the set point.
By understanding the temperature requirements of the cargo and utilizing the features offered by Thermo King, fuel usage can be optimized to maintain control of costs while ensuring the cargo is delivered on time and at the right temperature.
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Modern reefer units use 0.4-1.1 gallons of diesel per hour
Reefer fuel is specifically designed to power the refrigeration units attached to reefer trailers. It has a lower energy density and a higher flashpoint than tractor fuel. Reefer fuel is formulated to work effectively in colder temperatures, ensuring the safe operation of the refrigeration unit.
The amount of fuel consumed by a reefer unit depends on several factors, including the manufacturer, the age of the trailer, and the size of the load. Older trailers tend to use more fuel, with consumption rates ranging from 1 to 3 gallons of reefer fuel per hour. Modern reefer units, on the other hand, are more fuel-efficient, with some models offering industry-leading fuel savings.
To optimize fuel efficiency, it is essential to maintain the refrigeration unit properly. Regular maintenance ensures the unit operates efficiently, reducing fuel consumption and lowering costs. Additionally, certain modes, such as automatic mode, can help reduce fuel consumption by running the engine only when necessary.
By understanding the factors that impact fuel usage and adopting efficient practices, companies can effectively manage their reefer fuel usage, control costs, and ensure timely deliveries of cargo under optimal temperature conditions.
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Automatic mode reduces fuel consumption and engine runtime
The Thermo King T-90 Series offers a range of features that improve fuel efficiency and reduce engine runtime. The T-90 Series includes the T-690, T-890, and T-1090 models, which are designed to meet various extreme temperature control requirements.
The T-90 Series features the latest Thermo King-designed reciprocating compressors, which offer improved reliability and performance. The X-214 and X-430 reciprocating compressors are a key component of the new design, providing maximum capacity and improved fuel efficiency. The T-90 Series also includes larger coils and heat exchangers, as well as optimized compressor and engine speeds, which contribute to reduced fuel consumption and engine runtime.
Thermo King's QuickTemp technology further enhances the fuel efficiency of the T-90 Series. Laboratory tests have shown that the use of QuickTemp technology in the T-90 Series results in a reduction of fuel consumption by up to 35% and a decrease in engine runtime by up to 25% compared to competitive products. This technology also provides better control of cargo temperature and extends the unit's life.
Additionally, Thermo King offers the Cycle Sentry mode, which is an automatic mode that reduces fuel consumption and engine runtime. This mode is similar to a household refrigerator's operation, where the system shuts off when the set temperature is reached and restarts when the temperature rises above a predetermined level. This feature ensures that the refrigeration unit operates only when necessary, optimizing fuel efficiency and engine runtime.
Thermo King's OptiSet Plus profiles also contribute to fuel savings. Thermo King certified dealers can preload these profiles to match specific operational needs, ensuring that temperature set points, ranges, and Cycle Sentry mode usage are optimized for each trip. This customization helps to improve fuel efficiency and reduce engine runtime by tailoring the refrigeration unit's performance to the specific requirements of each journey.
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Reefer fuel is designed to run refrigeration units when the truck isn't running
Reefer fuel is designed to power refrigeration units attached to reefer trailers. These refrigeration units have their own motors and reefer fuel tanks, which ensure that the cargo remains at the right temperature even when the truck engine is off. Reefer fuel is refined to have a lower energy density and a higher flashpoint, allowing it to operate safely in colder temperatures. This design ensures that the refrigeration unit can maintain the cargo's optimal temperature even when the truck is stationary.
The amount of reefer fuel consumed depends on several factors, including the manufacturer, the trailer's age, and the load's size and temperature requirements. Older trailers tend to use more fuel, with an average consumption of 1 to 3 gallons of reefer fuel per hour, depending on the load and the refrigeration unit's workload. In contrast, modern reefer trailers are more fuel-efficient, with newer units consuming between 0.4 and 1.1 gallons of fuel per hour.
To optimise fuel efficiency, it is crucial to maintain the refrigeration unit properly. When a unit is not adequately maintained, it has to work harder to maintain the desired temperature, resulting in increased fuel consumption. Regular maintenance, according to the manufacturer's recommended schedule, can help prevent this issue and ensure the unit operates efficiently.
Additionally, selecting the appropriate operating mode for your cargo can help manage reefer fuel usage. For goods that can tolerate slight temperature variations, the automatic mode is ideal. This mode operates similarly to a household refrigerator, turning off when the set temperature is reached and restarting when the temperature rises above a predetermined level. This feature reduces fuel consumption and engine runtime, making it a cost-effective option.
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Frequently asked questions
Modern reefer units, including Thermo King's T-90 Series, use between 0.4 and 1.1 gallons of diesel per hour of engine runtime. Older trailers can use between 1 and 3 gallons of reefer fuel per hour.
Thermo King's T-90 Series offers improved fuel efficiency compared to older models. Additionally, you can reduce fuel consumption by using the automatic mode, or Thermo King's "Cycle Sentry" mode, which only runs the engine when the temperature inside the trailer rises above a predetermined level.
The amount of fuel a Thermo King reefer uses depends on factors such as the temperature setpoint, the size of the load, the age of the trailer, and how well the refrigeration unit is maintained. Proper maintenance can help reduce fuel consumption by ensuring the unit operates efficiently.











































