👉 A system fluid refers to the medium through which various substances, typically liquids or gases, circulate within a closed system, facilitating essential processes such as heat transfer, mass transport, and chemical reactions. These fluids can be pure liquids like water or oils, or mixtures such as air, blood, or industrial solvents. In mechanical and thermal systems, system fluids are crucial for transferring heat from a source to a sink or vice versa, enabling processes like cooling in refrigeration units or heating in HVAC systems. The properties of system fluids, including viscosity, density, and thermal conductivity, significantly influence the efficiency and performance of these systems.
