The study included an investigation to analyze the Absorption Heat Pump (AHP) and
Absorption Heat Transformers (AI-IT) using ammonia-water and water-lithium bromide
solutions. A fundamental AHP and AHT systems are described and the operating sequence
is explained. Since the AI-IT systems widely use ammonia-water solution with ammonia as
the refrigerant and water-lithium bromide solution with water as the refrigerant, the
comparison of the two is presented in respect of the coefficient of performance (COP), the
flow ratio (FR) and the maximum system pressure. It is concluded that the AI-IT system
using water-lithium bromide solution provided better performance than the system using
ammonia-water SOlUtiOU.