Turbocharged Diesel Engine Power Production Enhancement: Proposing A Novel Thermal-Driven Supercharging System Based on Kalina Cycle

In this paper, a novel thermal-driven supercharging system is proposed for downsizing of a turbocharged diesel engine. furthermore, the kalina cycle is used as a waste heat recovery system to run the mounted supercharging system. the waste heat of air in engine exhaust and intake pipes is converted to the cooling and mechanical power by the kalina cycle. the mechanical power produced by the kalina cycle is transferred to an air compressor to charge extra air to the engine in order to generate more power. this feature can be used for downsizing the turbo-charged heavy duty diesel engine. in addition, the heat rejected from the engine intercooler is transferred to the kalina cycle vapor generator component, and part of the engine exhaust waste heat is also used for superheating the kalina working fluid before entering the engine. then the first and second law analyses are performed to assess the operation of the engine in different conditions. moreover, an economic model is provided for the kalina cycle, which is added to the engine as a supplementary component. finally, the simple payback and net present value methods are used for the economic evaluation of the added supplementary system. according to the results obtained, mounting the novel waste heat-driven air charging system results in the incrementation of air mass flow rate, which leads to an extra power generation (between 9 kw and 25 kw). the payback period and the profitability index of the project are approximately 3.81 years and 1.26, respectively.