This project is based on renewable source of energy and we know that this energy is inexhaustible which reduces the dependence of power generation from fossil fuels which leads to the emission of harmful poisonous gases that results in degradation of the environment. Our project is an effort to produce electricity without degradation of environment.
The operation is based on Brayton cycle. In this project, we use two cycles, water cycle in which water is used as working fluid and ammonia cycle in ammonia is used as working fluid. In water cycle, water is heated in parabolic solar collector by absorbing solar energy. This hot water is supplied to heat exchanger in which heat is transferred from hot water to ammonia. The superheated ammonia is passed through nozzle in which pressure energy of ammonia is converted into kinetic energy which further increases velocity of superheated ammonia. The high velocity ammonia strikes the turbine blades in which expansion of high temperature ammonia takes place .A generator is coupled with the shaft of the turbine which converts mechanical power generated due to rotation of turbine blades into electrical energy. The expanded ammonia gas is cooled in condenser which is further compressed in compressor in which pressure of ammonia increases. The compressed ammonia is supplied to heat exchanger where it again gains heat from water .The water after transferring heat to ammonia ie supplied to solar collector.
I recommend that you use HYSYS chemical engineering process simulation platform to model this entire system. HYSYS has an electronic library which includes ammonia and H2O. HYSYS has all the thermodynamic models that you will need in this simulation. You can download a trial copy of this software from from ApsenTech.com
I use HYSYS to simulate chemical processes in the capstone chemical engineering course that I teach at Yale School of Engineering & Applied Science (SEAS).
Khalil, Y.F. (Fall 2016). Chemical Engineering Process Design. Lecture notes, CENG-416, SEAS, Yale University, USA
Hope thsi helps answer your question.
Professor Yehia Khalil
Yale University
USA
Yes we can do so many dairy plants are following solar absorption refrigeration system using ammonia as refrigerant
Ammonia has low melting point, it evaporates easily and using it as a working fluid for plant is also possible but the presence of nitrogen corrodes the turbine blades faster when compared to other chemicals. So we can run the turbine, not for a prolonged time
I would like to understand the nature of introducing two different working fluids, while it can be achieved by water alone. As per water's thermal properties, it is more suitable than ammonia for heaitng, if that is what you mean by expanding it in a turbine. Otherwise, there is always a possibility to look at using refrigerants for the same.
http://www.protonventures.com/wp-content/uploads/2016/06/AMMONIA.pdf
Article Feasibility of Using Ammonia-water Mixture in High Temperatu...
https://ir.library.dc-uoit.ca/bitstream/10155/780/1/Bicer_Yusuf.pdf
http://publications.lib.chalmers.se/records/fulltext/207145/207145.pdf
http://www.eng.ox.ac.uk/systemseng/publications/Ammonia-based_ESS.pdf
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