CFD MODELING AND EXPERIMENTAL INVESTIGATION OF SPRAY EVAPORATIVE COOLING (Ph.D. Thesis, Mehdi Nabati)

Evaporative cooling is a technology that 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 systems are partial evaporation and non- uniform distribution of temperature. This project will investigate the effect of critical parameters for solving the mentioned problems. BURET low-speed wind tunnel, water supply system and Particle Image Velocimetry system (PIV) will be used for conducting experimental tests.

PARAMETER OPTIMIZATION OF ALPHA, BETA & GAMMA-TYPE STIRLING CYCLES FOR WASTE HEAT RECOVERY FROM A HEAVY-DUTY TRUCK ENGINE (Ph.D. Thesis, Metin Güven)

This study demonstrates a first order analysis by using Schmidt  method, to investigate possibility of waste heat recovery (WHR) using Stirling engine from a heavy duty diesel. Alpha, Beta, and Gamma type Stirling engines are analyzed. Effect of each parameter in the work equation is defined and an optimum design for a set of given boundary conditions (temperature, pressure, total volume inputs) is obtained. Theoretical analysis shows that Beta-type Stirling engine is the most suitable for WHR. Further analysis for Beta-type will be done with second order analysis by considering efficiency of the exchangers and other heat losses.