Neven Ninić

An Alternative Energy Concept: A Solar Power Plant with a Short Diffuser

This paper elaborates an alternative energy concept involving a solar power plant with a short diffuser. The main physical part of the proposed alternative energy source is a gravitational vortex (convective vortices) that can be thought of as a heat engine. A solar power plant with a short diffuser could produce electricity without carbon dioxide emissions by transforming the available solar energy into useful mechanical shaft work. The proposed concept is similar to the solar chimney power plant concept, but without a chimney of limited height; in that sense, the design is closer to the atmospheric vortex engine concept. Specific details about the proposed alternative solution, previous research outcomes and planned future research work will be discussed in this paper.

Decomposition method as a new type of second law analysis of the combustion process of internal combustion engines

The method presented in this paper gives not only the availability loss in each elementary step of the whole process in the engine, but also an insight into how big is the part of burnt fuel available during an elementary piston motion, something which cannot even theoretically be realised as pΔV work. This method is based on decomposition of a complex real process to so–called elementary processes equivalent to the real one. Practical applications of the decomposition method favour antecedence plotting of special u–s diagrams for combustion products.