Which law is used to help determine the pump size required to move liquid?

The Second Law of Thermodynamics is pertinent when determining the pump size required to move liquid. This law addresses the efficiency of energy transfer and the direction of energy flow in thermodynamic processes. In terms of pump sizing, it helps engineers understand the energy required to move fluids within a system, taking into account factors such as frictional losses, pressure changes, and flow rates.

Understanding the Second Law is crucial because it influences how much energy will be needed to overcome resistance in the pumping system and maintain an effective flow of liquid. By applying this law, calculations can be made to ensure that the pump selected will efficiently handle the required flow rates and operate within its optimal range, thus ensuring system reliability and efficiency.