US Army awards SBIR contract for CO2 refrigeration system

US Army awards SBIR contract for CO2 refrigeration system

The US Army Natick Soldier Systems Center (NSSC) has awarded S-RAM Dynamics a Small Business Independent Research (SBIR) Phase 2 contract for $1 million to build and test a mobile refrigeration system demonstration prototype using the new S-RAM energy recovery compressor that uses the natural refrigerant carbon dioxide (CO2).

This next-generation CO2 refrigeration system will reduce energy consumption of the Army’s mobile refrigeration assets in excess of 50%, decreasing fuel consumption for forward operating bases without using synthetic refrigerants. The mobile CO2 demonstration refrigeration system will be installed on the Army’s Multi-Temperature Refrigerated Container System (MTRCS).

The S-RAM CO2 energy recovery compressor is the enabling technology that makes HVAC, refrigeration, and heat pump systems more efficient and climate friendly. This patented energy recovery compressor integrates an axial piston compressor with an opposed axial piston expander to recapture normally lost energy and boost system performance. The energy recovery compressor will be applicable to millions of refrigerated transport containers worldwide, as well as millions of stationary refrigeration units. This technology is also being used for an external heat recovery engine to generate power as well as an axial internal combustion engine for unmanned systems, such as drones. The S-RAM CO2 energy recovery compressor will be manufactured in Tennessee.

“We are pleased the Army recognized the impact of our proprietary CO2 compressor and expander technology to reduce energy consumption while eliminating harmful greenhouse gas emissions,” said Lee Jestings, S-RAM Dynamics president. “This demonstration contract will help accelerate our commercialization efforts for a broad range of refrigeration and heat pump products.”

The S-RAM compressor technology is being developed with the assistance of Purdue University at the Ray W Herrick laboratories, led by Professor Eckhard Groll.

S-RAM Dynamics, based in Nashville TN, is a privately held energy technology company focused on commercializing energy-efficient technologies including natural refrigerant HVAC (heating, ventilation, and air-conditioning) applications, waste heat to power engines and power generation axial engines. The company has 47 patents for its variable power conversion technology and three patents pending.

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