DESIGN AND CONSTRUCTION OF LITHIUM BROMIDE - WATER BASED SINGLE EFFECT SOLAR VAPOR ABS ORPTION AIR CONDITIONING SYSTEM

The objective of this work is to design and construct a lithium bromide ? water (LiBr - H 2 O) based single effect solar vapor absorption air conditioning system up to 1TR capacity . Absorption air conditioners are machines which produce cooling by using heat energy and have no moving parts. The various st ages of design are presented including the design of the evaporator, absorber, solution heat exchanger, generator and condenser. The major problem faced during the design stage was the calculation of the heat transfer coefficient (U - value) of the various c omponents. Single - pass vertical - tube heat exchangers have been used for the absorber and for the evaporator. The solution heat exchanger was designed as a single - pass annulus heat exchanger. The condenser and the generator were designed using horizontal tu be heat exchangers. The condenser handles pure water vapor and adequate equations exist for the determination of the U - value. In design the area of all the major components of the system is calculated on the basis of enthalpy parameters at different points in the system. Water is used as the refrigerant in the system and Lithium bromide as absorbent in the physic - chemical process. The various stages of refrigeration system are presented including the design of the evaporator, absorber, solution heat exchang er, generator and condenser and finally COP is calculated.