Carrier Transicold’s X4 Series

Carrier Transicold has introduced its ultra-high efficiency X4 Series, delivering what it claims to be the highest refrigeration capacities currently offered in a trailer refrigeration platform. It’s also compliant with EPA Tier 4 emissions requirements.

The new line offers the highest refrigeration capacities ever delivered by Carrier trailer units, the company says, combined with lower fuel consumption, lower maintenance costs, lighter weight, and quieter operation than the previous platform.
 
The X4 Series includes the new 7500 and 7300 single-temperature, belt-driven models, which both require less power than Carrier’s prior platform as well as competitive equipment designed for 2013 Tier 4 compliance, the company says. Respectively, the new units provide 68,000 and 66,000 BTUs of cooling at a setpoint of 35 degrees F (100 F ambient).
 
The new units are said to achieve 35 to 50% more BTUs of cooling per gallon of fuel, at AHRI rating conditions, than Carrier’s current designs.

The company’s  ecoForward technologies refine the design of unit components and equip the 2.2-liter engine with sensors and an electronic control module that communicates with Carrier’s APX control system for optimized performance.

Compared to the X2 series models they succeed – the 2100 and 2500 respectively – the new X4 units weigh 30 lb less; provide 3 to 10% higher cooling capacity; achieve up to 20% faster pulldown; consume 5 to 22% less fuel over a full range of operating conditions and up to 35% less fuel during pulldown; require 24% less refrigerant; and operate at up to 18% slower speeds and reduce engine runtime by up to 15%, resulting in improvements in durability and longevity as a result of more lightly loaded components, Carrier says.

Proportionately, the greatest fuel savings come when the units are operating under the most demanding circumstances, says Carrier. For example, when hauling frozen loads in higher ambient temperatures, fuel savings of up to 22% are possible compared to the company’s earlier models.

System improvements include high-efficiency components like optimized V-Force fans and Novation micro-channel condenser coils. An electronic expansion valve is now standard, replacing mechanical expansion valves found on previous models.

Using 18% less engine power than previous Carrier models, the X4 unit engines are certified for compliance with the 2013 EPA Tier 4 standard for engines less than 25 hp. Fleets will be able to equip units with an optional engine emissions system, further reducing emissions to provide future compliance in California beyond the initial seven years.