Active systems utilize which of the following to increase heat transfer?

Active systems utilize fans and pumps to increase heat transfer because these components are essential for circulating fluids (such as air or water) within a system. Fans move air across heat exchangers or through ducts, which enhances the transfer of heat by increasing the airflow. Similarly, pumps circulate liquids through piping systems or heat exchangers, ensuring efficient heat exchange by promoting fluid movement.

This active engagement in moving heat transfer fluids is what distinguishes active systems from passive ones, which rely on natural methods like convection or conduction without additional energy input. Fans and pumps directly contribute to more effective climate control, heating, and cooling processes, thereby improving the overall efficiency and performance of thermal systems.