4: Mechanical Cooling Last updated Save as PDF Page ID 18016 Aaron Lee BCcampus 4.1: Mechanical Cooling – General Applications 4.2: Mechanical Cooling – Principles 4.3: Hydronic Cooling Systems 4.4: Gas Laws 4.5: Phase Changes 4.6: Direct Expansion Air Conditioning Systems 4.7: The DX Cooling Cycle 4.8: Self Test 4 Thumbnail: Air conditioners (Unsplash license; Ashkan Forouzani via Unsplash )