Power recovery exemplification using turbocompound technique on diesel engines

Power recovery exemplification using turbocompound technique on diesel engines

Lavarda, Jairo Vinícius; Lodetti, Julio

Artigo:

The turbocharges concept was developed almost at same time combustion engines, in 1890s. They were initially introduced in the naval industry, followed by aviation, after in trains and coming to road vehicles between the two world wars. In a simple way, turbochargers take energy from exhaust hot gases flow that would be wasted to ambient to force fresh air into intake manifold, increasing whole efficiency of the system. But a lot of energy still left in gas flow and turbo-compound technology aims to convert that energy in power. Thus, the present study aims to implement a simulator with thermodynamics equations that describes diesel engines with turbo-compound. The results start with validation, follow by parameters variation like expansion ratio of power turbine, exhaust gases temperature, backpressure and engine RPM. In short, the maximum fuel consumption reduction is about 10% (in a very specific configuration). The engine RPM has no influence in fuel consumption reduction. Using parameters properly set can reduct fuel consumption in up 7,5%, but outside these parameters deteriorates whole efficiency.

The turbocharges concept was developed almost at same time combustion engines, in 1890s. They were initially introduced in the naval industry, followed by aviation, after in trains and coming to road vehicles between the two world wars. In a simple way, turbochargers take energy from exhaust hot gases flow that would be wasted to ambient to force fresh air into intake manifold, increasing whole efficiency of the system. But a lot of energy still left in gas flow and turbo-compound technology aims to convert that energy in power. Thus, the present study aims to implement a simulator with thermodynamics equations that describes diesel engines with turbo-compound. The results start with validation, follow by parameters variation like expansion ratio of power turbine, exhaust gases temperature, backpressure and engine RPM. In short, the maximum fuel consumption reduction is about 10% (in a very specific configuration). The engine RPM has no influence in fuel consumption reduction. Using parameters properly set can reduct fuel consumption in up 7,5%, but outside these parameters deteriorates whole efficiency.

Palavras-chave:

DOI: 10.5151/simea2019-PAP103

Referências bibliográficas

• [1]

Como citar:

Lavarda, Jairo Vinícius; Lodetti, Julio; "Power recovery exemplification using turbocompound technique on diesel engines", p-52-68. In: XXVII Simpósio Internacional de Engenharia Automotiva. São Paulo: Blucher, 2019.
ISSN 23577592, DOI 10.5151/simea2019-PAP103