Abstarct: In the present study, the model of a simultaneous production system (cchp) that responds to the amount of heat and cold load required by a residential building located in Tehran, which has been done by Revit software, has been modeled an internal combustion engine (otto) was used as the primary actuator and a two-bed adsorption chiller with a silica gel-water pair was used for cooling operations. Adsorption chillers are a new way to replace compression refrigeration systems and absorption. These chillers are baxsed on the adsorption and desorption of an adsorbent in the adsorbent (silica gel), which is a porous solid. In this sense, the system under study has a new combination of simultaneous production systems this is because absorption systems are commonly used for cooling operations in conventional production systems. For this purpose, the initial stimulus in proportion to the amount of load required by the relevant building is first modeled and the heat dissipation of the engine is recovered using a heat exchanger. And this energy is used for the amount of heating and cooling required by the building. And now, the behavior of adsorption chillers in different modes is examined, which has a significant effect on the coefficient of performance and cooling power, which are the two basic parameters in determining the performance evaluation of the refrigeration system. EES software has also been used for calculations. The results show that with increasing the temperature of the incoming hot water, the cooling power and the coefficient of performance increase, which is the highest amount of cooling power at 90℃ equal 7.445 kW and the coefficient of performance at 58.5℃ is equal to 0.6519. Also, with the increase of cooling water temperature from 20℃ to 40℃, the amount of coefficient of performance decreases from 0.6054 to 0.4903 and the cooling power decreases from 9.834 kW to 3.874 kW. As the mass value of the hot water flow increases, the amount of cooling power and the coefficient of performance increases. Approximately 1,115 watts of cooling per kilogram of adsorption is obtained by the surface adsorption system. Also, with the help of the analysis of the second law of thermodynamics, the amount of exergy destruction and exergy efficiency at different stages of the surface adsorption cycle have been investigated, which shows the results as the temperature of the incoming hot water enters the bed, the amount of exergy destruction increases and the exergy efficiency decreases. Also, as the temperature of the cooling water entering the bed increases, the amount of exergy destruction decreases, and the exergy efficiency, like exergy destruction, declines. This is because as the cooling temperature rises, lower amounts of refrigerant are absorbed, reducing the amount of cooling power that causes the exergy efficiency to decline. Finally, we examined the parameters affecting the performance of the absorption chiller under the influence of the total efficiency and the exergy efficiency of the whole system, which shows the results., the total efficiency of the system at the inlet water temperature is 90% equal to 61.46% and the total exergy efficiency is equal to 50.05%.and increasing the cooling water temperature from 20℃ to 40℃ reduces the total efficiency and exergy efficiency of the whole system from 63.22% to 58.82% and 50.1% to 49.9%, respectively. Also, as the mass rate increases, the amount of total efficiency and exergy efficiency of the whole system increases.