International Grocery Chain- Mid-Atlantic

International Grocery Chain

A large international Grocery chain was experiencing high energy costs and was interested in validating energy conservation measures (ECM) offered by Energy Efficient Technologies. After a thorough energy audit a number of  ECM’s were recommended.  The focus of this case study is the validation of a third generation HVAC and refrigeration ECM, now in its 4th patented generation called CryoGenX4.

We figured it out:

There is a known problem in every oil lubricated HVAC and refrigeration system that gets worse over time. It is called thermal degradation (also called oil fouling) and is well documented by the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) and the original equipment manufacturers (OEM’s). It is a major cause of capacity loss in Heating, Ventilation, Air Conditioning and Refrigeration (HVAC/R) systems, preventing them from operating at the original design efficiency. For the past seven years, the licensed professional engineers at Energy Efficient Technologies (EET) have been working with, testing and deploying the Tri-S Technologies Energy Control Measure (ECM) used to reduce energy consumption and improve the performance and capacity of all oil lubricated HVAC and refrigeration systems.
During 2014-2015, EET and Tri-S have been verifying the effectiveness of the ECM in Rooftop unit HVAC systems (RTUs) and refrigeration racks in two locations of this mid-Atlantic grocery store chain based in MD. The purpose of this study is to document the performance improvements and future energy cost reductions associated with the energy conservation measure (ECM).
The study was a success as it clearly achieved the following:

• Ability of the equipment to better satisfy fluctuating store and refrigeration loads
• Produced additional cooling capacity at no extra cost or interruption to store operations
• Improved cooling equipment efficiency, lowering cost to produce each ton of cooling
• Restored thermal efficiency, allowing equipment to achieve thermostat set points faster
• Reduced overall energy consumption and peak demand charges (KVA)

HVAC Validation Results:

  • Capacity was increased 54.2 %
  • energy usage to perform the same cooling load decreased by 32.6%
  • Payback 7.6 months

Refrigeration Rack Results:

  • overall 10% reduction in energy costs
  • 6.1% Reduction on compressor rack consumption
  • 16.6% Reduction on Condenser units

As you can see from this graph of the utility grade meter measuring electricity of the entire rack system over time, there is no doubt our ECM is saving kWh and reducing carbon footprint:

Deployed in all equipment in one store:

  • Savings at .095 kWh are $18,291

  • 1.47 year payback

  • 732.7% ROI over the equipment life

To read about other Grocery Store Success:

Grant’s Supermarket

Bi-Rite Grocery

Price Choppers Grocery