Ghassan Al-Hassan

An investigation of the air contained water extraction using a solar vapor absorption chiller working under the climatic condition of Riyadh city is carried out. Three typical days from different seasons were chosen for the study to evaluate the best operating conditions. Despite that the maximum cooling production is in July, the maximum water production is in January due to the high relative humidity, in fact the maximum of daily production 10.22 L/day. The performances of the absorption chiller and the solar collector are also evaluated and are found to be much influenced by the operating climatic conditions.

Abst ract- The purpose of this paper is to investigate the extraction of fresh water from humid air in Saudi Arabia by direct solar absorption system using aqueous ammonia 0.45 mass fractions (ammonia–water). In the system, ammonia is boiled out of the water then condensed in an air cooled condenser. The refrigerant is then expanded and evaporates in the evaporator exists inside a tunnel where humid air flows, and therefore the temperature of humid air is reduced beyond its dew point temperature so a process of water separation from humid air starts. To analyze the performance of the system, first a comprehensive mathematical model describing the entire processes accomplished within the major components in the cycle is introduced based on heat and mass conservation balancing considering steady flow processes. The results of calculations are to find out the actual real sizes of all involved major components within the system based on simulation analyzing. The amount of the extracted ...