This book contains an explanation of the concept of the conditioning and cooling system. Using solar energy and how to improve it. To arrive at the best result with complete calculations.This book is also used for a university graduate project. Or a research project for a master's thesis.This talk about an absorption chiller by using solar energy, the water-lithium bromide is used in this system ( Lithium bromide is absorbent and water is refrigerant ), and the heat generated in desorbed by solar collectors.All kinds of absorption refrigeration systems are mentioned and their situations and how to take advantage of the use of each of them.The purpose of the following system is to perform a helpful air conditioning for a home space without reaching the freezing point ( not below 0 ℃ ).