In internal combustion engines, a significant share of the fuel energy is wasted via heat losses. This study aims to understand losses and analyze potential waste recovery when biofuels are used in SI engines. A numerical model developed for single-cylinder, four-stroke air-cooled engine carry out analysis. To verify solution, experiments first conducted gasoline engine. Biofuels including pure...

Currently, global warming has been a serious issue, which is closely related to anthropogenic emission of Greenhouse Gas (GHG) in the atmosphere, particularly Carbon Dioxide (CO2). To help achieve carbon neutrality by decreasing CO2 emissions, Oxy-Fuel Combustion (OFC) technology becoming hot topic recent years. However, few findings have reported about implementation OFC dual-injection Spark I...

The demand for transportation energy is growing and thus improving the efficiency reducing pollutant emissions from this sector critical. Transportation has historically been powered by internal combustion engine (ICE). Many alternative technologies are being evaluated to replace ICE, such as hydrogen fuel cells battery electrics. These appear attractive at vehicle-level but have many challenge...

We present a theoretical and numerical analysis of a quantum system that is capable of functioning as a heat engine. This system could be realized experimentally using cold bosonic atoms confined to a double well potential that is created by splitting a harmonic trap with a focused laser. The system shows thermalization, and can model a reversible heat engine cycle. This is the first demonstrat...

The fast development of the internet and the growth of digital contents available led to the development of search engines that facilitate the recovery of information in the Web. However, these engines have limitations mainly when recovering specialized contents. Geospatial data are created by local governments, companies and people, but these data aren’t available in a systematized way. In thi...

in this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. the engines are assumed to be implemented as composite web services. current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. the difficulty is to rollback the execution state of the workflo...