SharePressure exchanger enhances efficiency of CO2 refrigeration systems
A new pressure exchanger technology, adapted from the desalination industry, offers significant energy efficiency improvements for CO2 refrigeration systems, addressing challenges of high energy consumption in hot climates.
This innovative device recycles pressure energy within the refrigeration system by transferring energy between high- and low-pressure CO2 refrigerant streams through a series of continuously rotating ducts. Recent findings [1] suggest it can improve the coefficient of performance (COP) of CO2 systems by up to 30%, with projected annual energy savings of around 15%.
Baptized PX G1300, the exchanger has also demonstrated an ability to increase cooling capacity by up to 15% at 35°C, ensuring greater system resilience during heatwaves. Unlike conventional solutions that rely on water, it achieves efficiency gains without additional water requirements, addressing concerns over cost, availability, and maintenance.
The technology originates from the seawater desalination sector, where pressure exchangers have been used for over three decades to significantly reduce energy consumption in reverse osmosis processes. By recovering and reusing energy from high-pressure brine streams, these systems have helped make seawater desalination more efficient and sustainable.
Adapted for CO2 refrigeration, the PX G1300 highlights the versatility of this pressure exchanger technology, capable of handling liquid, gas, and two-phase flows. Its implementation reduces compression work, contributing to both energy savings and lower emissions.
The PX G1300 represents a step forward in sustainable refrigeration, aiding the transition from hydrofluorocarbons (HFCs) to low global warming potential refrigerants like CO2.
Sources
[1] Sarawate N., Tan Y. A., Bordbar B., McLean J., Thatte A. 2024. Field Experience of PX G1300® Pressure Exchanger in Commercial CO2 Refrigeration Systems: Performance Measurement & Validation. Energy Recovery. [Link]
Additional sources
https://www.coolingpost.com/world-news/pressure-exchanger-improves-co2-refrigeration-efficiency