Dissertation Defense - Cem Keskin (PHDME)

Cem Keskin - Ph.D, Mechanical Engineering

Prof. Pınar Mengüç – Advisor

Date: 11.06.2020

Time: 14:00

Location: This meeting will be held ONLINE. Please send an e-mail to gizem.bakir@ozyegin.edu.tr in order to participate in this defense.

AUGMENTING OCCUPANT THERMAL EXPERIENCE WITH CYBER-PHYSICAL-SOCIAL SYSTEMS: A CASE STUDY ON ADAPTIVE VENTS

Thesis Committee:

Prof. M. Pınar Mengüç,  Özyeğin University

Prof. Gülgün Kayakutlu, Istanbul Technical University

Asst. Prof. Özgür Ertuç,  Özyeğin University

Asst. Prof. Altuğ Başol,  Özyeğin University

Asst. Prof. Berker Yurtseven, Istanbul Technical University

Abstract:

The study presents an adaptive vent system (AVS) designed as a cyber-physical-social system (CPSS) to enable localized and customized thermal management inside the buildings. The system composed of a novel diffuser design with individually operable flaps, thermal agents, user interface and a control and communication unit. It enables asymmetric air-inlet to the rooms to manage indoor temperature distribution and aims to match varieties in temperature with the differences in occupant demands. By doing so, the system is intended to decrease the total amount of conditioned air volume that results in HVAC energy savings without sacrificing occupant comfort. However, designing and managing such a system is a challenging task. In order to overcome the complexity of the task, a novel CPSS modeling approach is proposed. The approach combines hybrid dynamical modelling (for cyber and physical aspects) with human behavior modeling (for social aspects) to assess the diverse realms of the proposed system. A prototype of the system was installed in an office in Engineering Faculty Building of Özyeğin University.  The experiments show that the system can enable demand-driven HVAC control and augment occupant interaction. On the other hand, the computational fluid dynamics (CFD) simulations were conducted to investigate the indoor airflow regime and resulting thermal conditions. Coupling CFD simulations with 1D-thermoregulation model made it possible to observe the changes in thermal sensation of occupants for different operational modes of the system. The experiments and simulations for the system performance assessment show the capabilities for controlling the temperature distribution within designated zones, which has significant potential for energy savings.

Bio: 

Cem Keskin has completed the undergraduate program of Middle East Technical University Department of Physics in 2008 and received his master's degree in 2013 from Energy Science and Technology Program of Istanbul Technical University Energy Institute. In his MSc study, he focused on industrial energy management and developed tools for implementing lean engineering and 6-Sigma tools to industrial energy efficiency projects. He had worked in the private sector for five years as an executive assistant and operations manager. In 2015, he started to work as a researcher in Center for Energy, Environment and Economy (CEEE). He was the project engineer in Horizon2020-TRIBE project of the CEEE for three years. He is currently studying on development of cyber-physical-social systems for enabling interactive task-ambient conditioning and leveraging human-building interaction for building energy efficiency.  During his Ph.D. study, he has completed two journal papers, 2 conference presentations, a patent application, and a book translation (English to Turkish).