Ongoing Projects
Multi-Objective Optimization Of ORCs That Operate On Low-Grade Heat Source And Use Zeotropic Mixtures
(Ph.D. Thesis, Hasan Eren Bekiloğlu)
The main purpose of this study is to examine the performance of zeotropic mixtures for very low-grade heat sources. A multi-objective optimization will be carried out to maximize net power output and minimize capital cost using a genetic algorithm. The cycle model will incorporate a mean-line radial inflow turbine design with loss calculations to add dynamic turbine stage efficiency. Heat transfer models will be established for the evaporator, condenser, and recuperator, and ideal geometric parameters will be sought for each heat exchanger in the system regardless of working fluid and heat source temperature. The total heat transfer area will be calculated using the heat transfer models, and it will be used as an economic indicator for the heat exchangers. Different ORC configurations such as simple, regenerative, and recuperative will be compared, zeotropic mixtures will be used to generate work from moderate, low, and very low-grade heat sources. With the comprehensive data, it will be tried to find a method to determine constituents of the zeotropic mixtures instead of blind trials.
Numeric Simulation and Experimental Investigation of a Lab-Scale Organic Rankine Cycle with Scroll and Radial Inflow Turbines
(Ph.D. Thesis, Ertuğrul Altun)
The Organic Rankine Cycle (ORC) has emerged as a promising technology for waste heat recovery and renewable energy conversion due to its adaptability to low-temperature heat sources. It finds applications in various sectors including industrial processes, geothermal energy, and solar power generation. Turbine technology selection is crucial for determining the performance and efficiency of ORC systems. This research aims to investigate the dynamic behavior of an ORC system equipped with an existing scroll turbine and to perform design and computational analysis on a radial inflow turbine. The scroll turbine will be implemented and tested experimentally, while the radial inflow turbine will be studied through simulations without manufacturing and implementation.
CFD modeling and experimental investigation of spray evaporative cooling
(Ph.D. Thesis, Mehdi Nabati)
Evaporative cooling technology can be utilized in natural draft cooling towers. The advantage of this technology is lower consumption power. The main objective of this project is to design and test an evaporative cooling system using water spray nozzles. The main problems in this type of cooling system are partial evaporation and non-uniform temperature distribution. This project will investigate the effect of critical parameters on solving the mentioned problems. BURET low-speed wind tunnel, water supply system, and Particle Image Velocimetry system (PIV) will be used for experimental tests.
