Abstarct: Absorption air conditioning systems are divided into two categories: volumetric and surface. Although these systems have many advantages over compression systems, they also have drawbacks and disadvantages that make their study and analysis important. One of their most important advantages is very low energy consumption due to the elimination of electric compressors, low consumption and noise due to the lack of mechanical components, suitable for hot and dry desert areas due to the use of collectors and solar panels. One of the problems of this system is the high consumption of water in condensers and adsorbents, which is used to condense the refrigerant and cool the adsorbent, which is a big problem due to the lack of water in our country. The aim of this dissertation is to eliminate the evaporative cooling tower using heat pipes. Also, thermodynamic modeling of the absorption parts of the system was done in order to design a suitable heat pipe for the system and the effect of different input parameters on the system performance was investigated. The results showed that it is possible to use a heating pipe in the system and according to the input conditions, the amount of heat transfer load from each thermosyphon pipe with a length of 70 cm with water working fluid, 140 watts and the value of system performance coefficient for silica gel-water working pair 0/46. The cost of building the device is about $ 7,378 depending on the materials used in the system. This system prevents the release of 3265 kg of carbon dioxide annually and also due to the closure of the system and the use of water as a refrigerant, it has no water consumption and is not dangerous for the environment.