چكيده به لاتين
The wear and tear of the rail fleet can lead to more fuel consumption, reduced safety, increased environmental pollution, and passenger dissatisfaction. Currently, due to economic sanctions and financing problems, the average life of the passenger rail fleet in the country is more than 27 years. Therefore, it is necessary to take measures to modernize the fleet. Renovation of the rail fleet is often done with different goals; In this research, the main goal is to evaluate different scenarios of renovation and reconstruction of the passenger rail fleet and choose the best scenario.In this study, the passenger fleet of Raja Passenger Train Company as the largest passenger rail transport company in the country has been investigated. At first, by studying the previous research, criteria such as passenger comfort, safety, quality of travel, car cost-to-income ratio, accident rate, noise pollution, car life, the distance traveled by the car, and changes in the appearance of the car were taken into consideration. Using the opinion of experts and the conditions of the company, the final criteria were selected. Next, the number of passenger fleets that are eligible according to the conditions of the defined scenarios was determined. In the next step, the economic evaluation of the renewal of the passenger fleet was carried out in the form of six scenarios and using Comfar software.
In all scenarios, wagons with a lifespan of more than 30 and less than 45 years have been evaluated. In the first scenario, 119 worn-out wagons are replaced with new Chinese wagons, in this plan, subsidy is also paid. The second scenario is similar to the first scenario, with the difference that the subsidy is not considered in this scenario. In the third scenario, 119 worn-out wagons have been replaced with new Iranian wagons, in this plan, subsidy is also paid. The fourth scenario is similar to the third scenario, with the difference that subsidy is not considered in this scenario. The fifth scenario is the reconstruction of 119 worn-out wagons taking into account the subsidy and the sixth scenario is the reconstruction of 119 worn-out wagons without considering the subsidy. The obtained results show that the best scenario under consideration is scenario number five, that is, "rebuilding the worn-out passenger fleet including the subsidy" with a capital return rate equal to 99.17 percent.
