A new design for cooling exhaust gases for commercial vehicles

The management of thermal systems in ground vehicles is great importance in terms of safety and standards. Basics of the thermal systems are the heat sources, the heat from these heat sources and the management of the waste gases. Basically, when the air and fuel components are burned in the engine and the resulting heat energy is converted into useful work, the energy is transferred and taken out of the engine in various ways. Some amount of this thermal energy is converted to mechanical energy, some of it is thrown through the engine walls and the remainder is thrown into the atmosphere as exhaust gas. The temperature of the exhaust gas varies depending on the conditions of use, performance, emission values, standards and energy usage strategies of the vehicle. Three basic and critical situations can be considered: maximum power, maximum torque and idle. In these cases, different applications are carried out to achieve the standard emission values. Various catalysts are used to reduce emissions, as well as various processes, such as afterburning before and after the main combustion, after the exhaust gas is recycled back to the system and then sent back to the combustion chamber together with clean air and recirculated. All of these affect the exhaust gas temperature or increase the exhaust gas temperature in order to interact. Temperature of exhaust gases in trucks are at 500° C and above. This high temperature gas; can cause damage to parts are sensitive to heat in the vehicle and the parts that provide security risk when they lose their functions and which allow the vehicle to functionally work. Apart from this, with the risk of harming people and other living things around the vehicle, low ignition timing and temperature such as weed around at the exhaust outlet can cause ignition. For this reason, reducing the exhaust temperature is critical. To reduce exhaust gas temperature there various way, one of these reducing combustion efficiency and other is taking out heat from engine walls. If these two substances are carried out, engine performance is getting lower. This is why it is not appropriate to realize the first case. In the other case, if a much higher amount of heat is blown from the walls, the temperature of the combustion chamber falls below the temperatures suitable for combustion and directly affects the combustion efficiency, which in turn increases the amount of stress on the engine materials, resulting in reduced life in the engine blocks and pistons. However, in the two substances, the catalysts designed for the emission of exhaust gases at the low temperature of the combustion end result in low emissions due to low temperature, or the catalyst size is increased and the additional cost is incurred. For all these reasons, the exhaust gas must be taken to the atmosphere immediately after the catalyst and separators where the emission process is performed. In this way, a positive effect can be created instead of a negative effect on vehicle performance and emissions. A new cooling system was designed for the part just before the exhaust gas was thrown into the atmosphere. The primary goals of this cooler design are to be able to operate without using active energy and the use of energy in a passive environment. Therefore, the vehicle does not add to the operating and maintenance costs. The absence of moving parts on the cooler design is crucial to the fact that the parts life is longer and maintenance is not required in terms of not having energy consumption again. In many the industry has been developed jet pump to carry particulers however in this study jet pump is designed as a cooling system, it is another point of view to jet pump and this is why this study is unique. Factors affecting the performance of the jet pump have been investigated, as well as performance values related to temperature have been developed in this study. Jet pump performance is calculated by the function of the pressure drop and the fluid values that can be dragged. It was further enhanced by adding previously unworked temperature drop performance. There are various analytical formulations in the literature for jet pump design. These have been studied. These formulations have been investigated by using a computational fluid dynamics program as an advanced solution mechanism because of the implementation of geometries, the use of standard empirical data, the inability of symmetric flow effects and the lack of uniformity of the three axes of flow. Optimum geometry is achieved under desired conditions and the jet pump design procedure and also new formulations are created for design of jet pump.