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High Intensity Thermal Exchange through Materials and Manufacturing Processes
Program Status: 
Program Description: 

The projects comprising ARPA-E’s HITEMMP program will develop new approaches and technologies for designing and manufacturing high temperature, high pressure, and highly compact heat exchangers that enable highly efficient and power-dense systems across a wide range of applications. Heat exchangers are critical to efficient thermal energy exchange in numerous industrial applications and everyday life. They have valuable applications in electricity generation, transportation, petrochemical plants, waste heat recovery, and more. HITEMMP projects target heat exchangers in power cycles capable of operating for tens of thousands of hours in temperatures and pressures exceeding 800°C (1,472°F) and 80 bar (1,160 psi), respectively. This new class of hardware requires novel manufacturing techniques, design topologies, and high performance materials for its design and manufacture. Such hardware would enable more compact and novel high efficiency power cycles using supercritical fluids, boosting the performance of a variety of power generation and industrial processes.

Innovation Need: 

Operations at high temperature permit increased efficiency. Simultaneous use of high pressure and high temperature enables substantial component size reduction but requires finer heat transfer surface and fin features at the limits of existing manufacturing capabilities. This is challenging because high temperature resistant materials are also notoriously difficult to manufacture, resulting in accrued cost. To overcome these challenges, HITEMMP project teams must adapt promising advanced manufacturing techniques with high performance materials that can withstand high temperature and pressure cycling operations with minimal degradation of their mechanical properties and loss of their structural integrity. Just as important, the enabling technology will refine existing technologies or develop new ones that enable attractive performance at an acceptable cost. Durable, reliable, and cost-effective higher-temperature and pressure heat exchangers that exceed current operating conditions could lead to substantially higher power conversion efficiencies that could reduce fuel consumption, system footprint (and thus capital and operation costs), and CO2 emissions.

Potential Impact: 

HITEMMP projects will enable a revolutionary new class of heat exchangers, along with innovative advanced manufacturing, with applications for a wide range of commercial and industrial energy producers and consumers.


High performance, efficient heat exchangers could increase industrial efficiency, supporting domestic industries. The developed manufacturing techniques for high temperature materials will re-establish and strengthen our nation’s leadership in advanced manufacturing.


More efficient electricity generation and industrial processes could significantly reduce related sector emissions.


HITEMMP technologies could enable more efficient and compact modular power for multiple applications.

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Program Director Name: 
Dr. Michael Ohadi
Press and General Inquiries Email: 
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