Refrigeration and Air Conditioning (Lecture Notes)

A complete reference book on refrigeration and air conditioning, covering the refrigeration cycle, refrigerants, system components, air conditioning, and hands on servicing. One of the most comprehensive free titles in this list.

SCERT

A university lecture series on air conditioning and refrigeration, with a strong focus on psychrometry, cooling load, and air conditioning processes. Full of diagrams and solved examples for engineering students.

Mushtaq Ismael Al-Ebrahimy

A focused chapter on HVAC and refrigeration systems, covering the vapor compression cycle, refrigerants, coefficient of performance, and vapor absorption systems. Includes the factors that affect performance and where energy savings come from.

Bureau of Energy Efficiency

A reference chapter on refrigerants, their properties, performance, and safety classifications, plus the phaseout of ozone depleting substances. A handy technical guide to choosing the right working fluid.

ASHRAE