COOLNOMIX Validation


Validating an Energy Saving Compressor Controller

Space cooling and refrigeration comprise close to 15% of commercial building site energy use. For the U.S. Department of Defense (DoD), this amounts to more than $500M per year in energy expenditure. One cost-effective way to improve the energy efficiency of existing cooling and refrigeration systems is to implement more advanced and intelligent controls.

Fraunhofer USA is working with CoolGreenPower to independently test the performance of the COOLNOMIX® retrofit solution, a standalone sensor-based control retrofit technology for vapor-compression air-conditioners and refrigerators. The technology uses a multi-sensor controller to optimize compressor runtime and stabilize space temperature to save energy without reducing thermal comfort.

An award from the DoD’s Strategic Environmental Research and Development Program (SERDP) and Environmental Security Technology Certification Program (ESTCP) supports field testing at Fort Bliss in El Paso, TX and Joint Base Anacostia Bolling near Washington, D.C., two locations with distinct climates (dry vs. humid) that allow researchers to measure performance across a range of environmental and loading conditions.

The COOLNOMIX® controller aims to achieve at least 15% end-use savings in targeted applications. If this savings figure applies to 70% of cooling and refrigeration at DoD facilities, the technology could yield more than $60M in annual savings opportunity, or 1.5% of total facility energy utilization.

Over the course of one year, Fraunhofer USA researchers are evaluating the energy performance and cost effectiveness of the COOLNOMIX® technology in single-zone air conditioning and refrigeration applications, across the following metrics:

  • Annual energy savings
  • Cost effectiveness
  • Ability to maintain or improve space temperature control
  • Ease of installation
  • Reliability of operation
  • End-user satisfaction