DXR refers to direct expansion refrigeration equipment or systems, which include walk-in refrigerators, single circuit refrigeration systems for cold storage or industrial refrigeration equipment.

Digi-DXR is an optimizer of direct expansion refrigeration systems, which can have up to eight (8) compressors. The compressor can be reciprocating compressors with/without unloaders, screw compressors with step or modulation slide valves. The compressor can be either constant speed or variable speed compressor(s). If the system have one or two compressors only, one VFD compressor is required.

Digi-DXR controllers are plug and play controllers, which control all compressors, condensers (air cooled, water cooled, or evaporative cooling tower), and one evaporator. If there are more than one evaporator, additional evaporator controllers shall be added.

Users can purchase Digi-Controllers from Bes-tech directly and hire local HVAC technician to install. Bes-tech engineers provide on-line assistance for installation and CX as needed.

Bes-tech provides customers turn-key projects as well. Call for details.

• Precision suction pressure and/or space temperature control or modulation: Control temperature within ±2°F and suction pressure within ±1Psi.
• Energy and/or Cost Savings: Reduction in electricity consumption or cost by 20% to 35%.
• Peak Demand Reduction: Reduced peak energy demand by 30% to 50%.
• Defrosting Efficiency: Decreased defrosting energy consumption by 20% to 80%.
• Extended Equipment Lifespan: Increased equipment lifespan by over 5 years due to more efficient operation and reduced motor cycling.
• Lower O&M Costs: Reduced operational and maintenance costs by 20% to 50%, primarily from fewer compressor and fan failures.
• Utility Incentives: Many utilities provide incentives to this technology and controllers. Consult your local utility energy program for details.

1. PSP: Plug, set, and play.
2. Retrofit existing equipment: No impact on current system operation and no interference with existing equipment.
3. Replace existing equipment: Purchase base equipment and add Digi-DXR to the existing refrigeration equipment.
4. Standalone or Integrated operation: Local touch screen  for system setup and information graphic viewing; and standard data communication port with any supervisory system or controller.

Digi-DXR leverages AI technologies to optimize refrigeration systems’ performance. Here are the key principles and advantages:

• Load Projection and Estimation Using AI: AI-based technologies predict future loads by analyzing historical data and real-time variables such as occupancy, weather, and usage patterns.
• Optimal Suction Pressure and/or Space Air Temperature Setpoints: AI identifies the ideal suction pressure or space temperature setpoints to minimize the energy consumption or cost based on the real time load, demand response requirement, and real time pricing.
• Load-Based Compressor Control: AI algorithms manage the optimal sequences for turning compressors on or off based on real-time demand, improving efficiency.
• Compressor Speed Modulation: Patented technology modulates the speed of conventional compressors to match system capacity with load, reducing energy consumption.
• Capacity and Load Matching: AI algorithms continuously adjust compressor and fan speeds to dynamically match capacity with demand in real-time.
• Smart defrosting control: AI algorithms identify the frost built-up and melt-down, and defrosting start and stop time based on heat transfer value variation pattern, fan power value and pattern, and evaporator surface temperature value and pattern.
• Fan and Compressor Motor Dual Safety Protection: Motor doctor technology and virtual pressure sensor to protect compressor motor failure or damage due to over current, phase drop out, motor vibration, high and low pressure, and indoor fan and condenser fan failure; and to protect indoor fan motor failure or damage due to over current, phase drop out, and motor vibration. Eliminated conventional pressure sensor failure points and maintenance cost.

• What are the primary benefits to facility owners who install the Digi-DXR?

• Why do facility service providers recommend the Digi-DXR?

• What important facts should ESCOs and Energy Consultant know about the Digi-DXR?

• Why should MEP and BAS contractors install Digi-DXR?

• Why should CX providers consider offering Digi-DXR?

• How does the Digi-DXR perform automatic demand response and real time pricing?

• What makes the Digi-DXR stand out?

• Does installing the Digi-DXR void any manfacture warranties?

• How does the Digi-DXR communicate with existing BAS and/or controller?