What is a characteristic of low pressure chillers compared to high pressure systems?

• A. Higher operating temperatures
• B. Lower refrigerant charge
• C. Longer life expectancy
• D. Lower operating pressures

Answer: (D)

Low pressure chillers operate at significantly lower pressures compared to high pressure systems, which is a defining characteristic of these types of chillers. This lower operating pressure allows them to use refrigerants that have a low boiling point, making them suitable for systems requiring specific cooling effects at those temperatures.

In addition to the safety advantages, low pressure systems generally experience less strain on their components, which can contribute to a longer lifespan. However, the primary defining feature of these chillers is indeed the lower operating pressures, which fundamentally differentiates them from high pressure chillers.

Operating temperatures, refrigerant charges, and life expectancy can vary and do not serve as definitive characteristics to distinguish low pressure chillers from high pressure systems. High pressure systems might have higher operating temperatures and often require a larger refrigerant charge compared to low pressure systems.