Computational Models Analysis of Diesel Engine Exhaust Waste Heat Recovery

With the increasingly prominent problem regarding rapid economy development and a relative shortage of energy, the internal combustion engine exhaust waste heat and thermal pollution has been more emphasized heavily recently. In order to reduce diesel engine exhaust waste heat and thermal pollution, a large number of heat recovery equipments have been maken, such as heat pipe boilers, thermoelectric generators(TEGs), heat energy store exchangers and modern air cooling and heating systems. Z12V190 diesel engine has high fuel consumption and low thermal efficiency, and releases large amounts of diesel exhaust waste heat (DEWH) into the atmosphere, causing energy waste problems. In this work, the diesel combustion reactions (DCRs) and diesel exhaust components (DECs) are analysed, and the computational models determining diesel exhaust emissions rates (DEERs) and diesel exhaust waste heat rates (DEWHRs) have been constructed, respectively, by employing mass and energy conservation. A typical example is given, with results as follows. Firstly, the Z12V190 DEERs are very large and increase sharply with increasing diesel exhaust O-2 mass percentage (OMP); Secondly; an increase in DEER leads to a linear increase. Thirdly, the DEWHRs is large enough to have potential for economic development.