႔ Chapter-1 Introduction 1-1 Chapter-1 Introduction to Chilled Water Systems ၁ . ၁ What is heat? (heat) ႔ (temperature) ႔ ႔ (transfer) (form of energy) (temperature) တ ႔ (thermal activity) (form of energy) (quantity) ႔ (intensity) (heat energy) (form of energy) ႔ (thermal activity) (molecules) တ (thermal activity) ႔ (velocity) ႔ (thermal activity) ႔ first law (heat energy) ႔ first law “law of conservation of energy” HVAC (remove heat energy) second law (heat energy) (temperature) ႔ (transfer)