Aspen Systems
Marlborough, MA
508-281-5322
www.apspensystems.com

Aspen Systems are supplying Environmental Control Units (ECU’s) for critical communications electronics cooling for the Joint Light Tactical Vehicles (JLTV) being produced by Oshkosh Corporation. The first vehicle order under this contract was released by the Army on March 23, 2016 for 657 vehicles. The initial JLTV production contract calls for a delivery total of nearly 17,000 vehicles, while the total program is expected to result in over 50,000 JLTVs delivered to the US Military.

Aspen Systems specializes in a cooling technique called vapor compression. Vapor compression cooling uses the unique characteristics of refrigerants to do the work necessary to pump heat from low to high temperature. Vapor compression cooling systems take advantage of the thermodynamic characteristics of refrigerants to cool a component or secondary coolant. Heat is absorbed from its source and rejected to a warmer exterior (typically the ambient environment).

As an active thermal management solution, vapor compression cooling systems provide sub-ambient cooling. With the use of an appropriate refrigerant, compressor, and heat exchangers, a vapor compression refrigeration system provides a flexible, efficient means of active thermal management.

Aspen’s miniature vapor compression environmental control units have been successfully deployed on the SOCOM MRAP’s. These ECU’s are used to cool electronics mounted outside the passenger cabin in the rear of the vehicle. In addition to providing 550 Watts of cooling, the system also provides up to 300 Watts of heating for temperature and humidity control for critical communications systems. These ECU’s are 5 times lighter, 4 times more energy efficient, and half the size of thermoelectric based systems.

The JLTV Family of Vehicles is being designed from the ground up to provide new levels of protected mobility in the light vehicle class, while supporting advanced networking, C4ISR suites and increased fire power. The JLTV’s onboard communications electronics will include HF, VHF, UHF, SATCOM and vehicle intercoms, centralized computers and Smart Displays including network and software integration.

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Aerospace & Defense Technology Magazine

This article first appeared in the December, 2016 issue of Aerospace & Defense Technology Magazine.

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