The document discusses various components of air conditioning and cooling systems. It defines heat load, air conditioning, air cooling, and refrigerated air. It then describes common components like cooling towers, condenser pumps, chillers, and supply air fans. Cooling towers transfer waste heat to the atmosphere using evaporation or dry cooling. Condenser pumps move condensate water. Chillers remove heat from liquid using vapor compression or absorption cycles. Supply fans circulate cooled air through ductwork.