Adjusting the floating discharge pressure in a refrigeration system is a technique used to optimize the system's efficiency and reduce its carbon footprint. The floating discharge pressure is the set-point for the refrigeration system's compressor discharge pressure, which varies according to the outdoor temperature. By adjusting the set-point, the compressor can work more efficiently, reducing energy consumption and lowering greenhouse gas emissions.
There are several reasons why adjusting the floating discharge pressure can help decarbonise industrial cooling:
Increases efficiency: By reducing the discharge pressure set point during cooler outdoor temperatures, the compressor consumes less energy, resulting in increased efficiency and lower operating costs.
Reduces energy consumption: The compressor uses less energy when it operates at lower discharge pressure, thus reducing the amount of energy needed to cool a given space.
Lowers carbon footprint: Lower energy consumption translates to lower carbon emissions, making this technique an eco-friendly way to decarbonise industrial cooling.
Maintains temperature control: Although adjusting the floating discharge pressure can save energy, it is important to maintain temperature control. By utilising advanced control systems, such as a variable speed drive or demand-based control, the cooling system can operate efficiently without compromising temperature control.
Improves reliability: By reducing the compressor's workload, adjusting the floating discharge pressure can extend the life of the system and increase its reliability. The higher the lift across the compressor the harder the compressor has to work and not only more energy is being used but compressor lifespan is reduced.