U.S. Army Awards Research Contract For Building Advanced CO2 Refrigeration System


S-RAM Dynamics was awarded a Small Business Independent Research (SBIR) Phase 2 contract for $1 million by the U.S. Army Natick Soldier Systems Center (NSSC). The research contract is to help build and test a mobile refrigeration system demonstration prototype utilizing the new S-RAM energy recovery compressor that uses CO2 refrigerant. The upcoming CO2 refrigeration system is projected to decrease energy consumption of the Army’s mobile refrigeration assets in excess of 50 percent. This will reduce fuel consumption for forward operating bases without making use of synthetic refrigerants. The mobile CO2 demonstration refrigeration system will be installed on the Army’s Multi-Temperature Refrigerated Container System or MTRCS.

The high speed and advanced S-RAM CO2 energy recovery compressor are designed to make refrigeration, HVAC, and heat pump systems climate friendly and essentially more efficient. The patented product incorporates an axial piston compressor with an opposed axial piston expander to recapture normally lost energy and enhance system performance. The company said the energy recovery compressor will be applicable to the millions of refrigerated transport containers that travel road and rail across the country and world and millions of stationary refrigeration units as well. This technology is also used for an external heat recovery engine to generate power and axial internal combustion engine for unmanned systems like a drone. The S-RAM CO2 energy recovery compressor will be manufactured in Tennessee.

Lee Jestings, the President of S-RAM said, “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. This demonstration contract will help accelerate our commercialization efforts for a broad range of refrigeration and heat pump products.”

Compressor expert and Mechanical Engineering Professor Eckhard Groll of Purdue University leads the development of S-RAM compressor technology at the Ray W. Herrick laboratories.

“We are excited to be part of testing S-RAM’s technology and to assist S-RAM with commercializing the energy recovery compressor along with the mobile CO2 refrigeration system. This cutting-edge technology has the potential of setting a new standard for innovative cleantech products,” Groll said.