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Scientific project: New Ascpect of Solar Chimney Power Plant Optimization

Project code 023-0231751-3011

Project name New Ascpect of Solar Chimney Power Plant Optimization

Senior researcher Sandro Nižetić

Institution of employment University of Split, Faculty of Electrical Engineering, Mechanical Engineering a...

Program name The Modeling and Development of The Sustainable Energy Systems

Scientific area technical science

Peer review group Mechanical Engineering;Shipbuilding;Traffic Technology and Transportation;Aeronautics and Space Technology

Summary In power plants of”solar chimney” type (solar chimney–SC) the air receives low-temperature heat at the ground level solar collector and flows towards the foot of the tall “chimney”. In Australia the first world power plant of this type is just being built – its nominal power will be up to 200 MW. In our opinion, the key starting cognition for the full development of SC type power plants is the following. The air heated in the collector would reach the state of (mechanical) equilibrium with the atmosphere only at the top of the troposphere, at approx. 10,000 m, while the Australian SC power plant chimney concentrates smaller part of the total work capacity of the air, which corresponds the lifting force of air rising only to the top of the 1,000 m tall chimney. For this reason, the SC-type power plants can be broadly considered as quality energy sources – like hydroelectric power plants – if by a broader optimisation discovers and utilises all heated humid air work potential. Such potential may realise only the particularly formed air turmoil column to the top of troposphere, with considerable sub pressure at the ground level around its axis. Such elaborated proposal of ours, accompanied by air work potential calculations, and has been accepted for publication in the respectable international magazine «Solar Energy» ( see article proof in Appendix). The project hypothesis is that by the warm collector air work capacity, left after its leaving the turbines, the gravitation vortex column (GVC) can be formed and maintained as a specific heating engine. Its function would be the one of a very tall “chimney” and it would provide for the improvement of techno economic performances of SC-type power plants. The aim is workout and improvement of its mathematical model, already conceived late last year. Working on it and its numerical exploitation in the following three years are the subject matter of this project and the planned doctoral thesis by the junior researcher Sandro Nižetić. Verification of the mathematical model prior to prototype testing is in critical analysis of the applied laws credibility, and the by the numerical results to be obtained by the model exploitation. The achieved results will represent the work out of constructive approach to a new and prospective aspect of solar energy production – being a contribution rather at Croatian (see 9.4 ) and even more at the global level.

Key words |Solar chimney| available energy, vortex

Contract from 2.1.2007

Croatian scientific bibliography http://bib.irb.hr/lista-radova?sif_proj=023-0231751-3011&print=true&lang=EN

Address for communication
 Name and surname Sandro Nižetić
 Street and no. T.P.Marović 8a, 21209, Mravince
 E-mail snizetic@fesb.hr
 Web address www.kt.fesb.hr/sandro.htm
Project assistants 
  Name and Surname  Status
Orest Fabris Researcher
Neven Ninić Researcher
Sandro Nižetić Project leader
Živko Trošić Researcher