Air Force wants new electronics
thermal management techniques
for fighter aircraft
August 4, 2015
cool the electronics on future fighter aircraft, which could be at least 10
times more demanding than they are today.
Officials of the Air Force Research Laboratory at Wright-Patterson Air Force
Base, Ohio, issued a broad agency announcement Friday
(BAA-AFRL-RQKP-2015-0002) for the Hybrid-Cycle Power and Thermal
Management System (PTMS) project.
The Air Force Research Lab's Power and Control Division,
Mechanical & Thermal Systems Branch are asking industry for electronics
cooling ways to blend air-cycle cooling, vapor-cycle cooling, chilled fuel,
and other thermal energy storage mechanisms to keep electronics
cool on future jet fighters.
Next-generation fighter aircraft will require an unprecedented level of
Next-generation fighter aircraft will require an unprecedented level of
advanced capabilities to operate in contested environments, including
advanced electronic attack, high-power lasers, and low-observability features,
researchers say. These systems will require as much as 10 times more power
than today's fighters do.
On these future power-hungry aircraft, thermal management may be an even
bigger concern than generating power because component efficiencies and waste
heat qualities will be low, researchers say.
Compounding the electronics-cooling problem will be modern jet fighter design
factors like composite aircraft skins, high-efficiency engines, and deeply embedded
aircraft systems compound these challenges. Other challenges involve varied duty
cycles of power loads on these future aircraft, which on a typical mission can change
from continuous to less than 5 percent. This will require a wide thermal management
system.
Conventional air cycle systems offer relatively high temperature lifts over comparable
vapor cycle systems, yet vapor cycle systems generally are 10 times more efficient
at moving heat, which could reduce heat-rejection demands on vehicle thermal sinks.
Vapor cycle systems also could reduce shaft power requirements, and engine-cycle
cooling is more efficient than bleed-air-driven air cycle systems. Researchers also are
interested in using chilled fuel or other thermal energy storage mechanisms for
electronics cooling.
In sum, researchers are interested in the ability to use available heat sinks selectively
in the most optimal way to ensure sufficient and efficient electronics cooling.
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industrial base adherence to standards such as IEEE, ANSI and ISO are nothing new.
However, there has been very little standards-based activity born out of defense.
Meaning, when a standards-based approach is called for, almost all of the activity
comes out of the commercial sector.
Brought To You By
The Hybrid-Cycle Power and Thermal Management System project could be worth
Brought To You By
The Hybrid-Cycle Power and Thermal Management System project could be worth
as much as $24 million and involve as many as six companies through 2019.
Companies interested should notify the Air Force of their intent to propose no later
than 19 Aug. 2015. Full proposals are due no later than 11 Sept. 2015. Email intents
and proposals to the Air Force's Sally Roliff atSally.Roliff@us.af.mil.
For technical questions contact the Air Force's Capt. Daniel Hatzung by email at daniel.hatzung@us.af.mil, or by phone at 937-255-6214.
For contracting questions contact Sally Roliff by email atSally.Roliff@us.af.mil, or
by phone at 937-713-9954; or Sarah Chaffe by email at sarah.chaffe@us.af.mil
or by phone at 937-713-9952, sarah.chaffe@us.af.mil.
More information is online athttps://www.fbo.gov/spg/USAF/AFMC/AFRLWRS/BAA-AFRL-RQKP-2015-0002/listing.html.
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