Abstarct: One of the problems of today's world is the reduction of fossil fuels and environmental fossil fuel pollution caused by fossil fuels in order to provide power, cooling and heating to provide people with comfort. Therefore, production systems are one of the effective methods to meet these needs simultaneously with the reduction of fossil fuel consumption and reduction of pollutant emissions. On the other hand, solar energy is a clean and free energy that can play a useful role in providing part of these needs. The combination of simultaneous production systems and solar systems can have a double effect on human life and the environment. Therefore, in this research, a system of simultaneous production of gas-fired and flat panel collectors has been analyzed for energy use at the Shahrood University of Technology. The capacity of the study was 1253 kWh of power and 1500 kW of heating and 250 tonref calculated by Carrier software. Then, the collection demand has been investigated under 4 different scenarios using coding in the MATLAB software environment. The results show that supplying this demand with the help of the gas engine and solar collectors is the best scenario and there is no need for a backup boiler. The results also indicate that this compound will result in a 97% efficiency in CCHP mode and a 69% efficiency in CHP mode. Also, the CR and FESR values in this compound would be 56.14% and 40.64% respectively. Additionally, the peyback period will be around 10 years depending on the interest rate.