Dr. Michael Ohadi

Director, Professor of Mechanical Engineering, and CEEE Founding Faculty Member

Dr. Ohadi is a CEEE founding faculty member and founder of the Advanced Heat Exchangers and Process Intensification Consortium. He is internationally recognized for his research in heat and mass transfer and smart energy systems . He is the inventor/co-inventor of eight issued U.S. patents and has published more than 150 refereed technical publications. Dr. Ohadi has actively participated in promoting the support for fostering technological innovation and entrepreneurship. In 2002, he was featured in Washington Post for his efforts involving innovation and technology transfer. From 2003 to 2010 he was on leave assignment to the Petroleum Institute (Abu Dhabi) where served as Director of Mechanical Engineering (2003-2006) and Provost and Acting President (2006 to 2010). He is a fellow member of both ASME and ASHRAE and has won numerous awards from both societies.

Dr. Amir Shooshtari

Research Associate Professor

Amir H. Shooshtari is an Associate Research Professor in the Advanced Heat Exchangers and Process Intensification Lab at the University of Maryland, College Park. He received his Ph.D. in 2004 in Mechanical Engineering. Since 2005, he has been a member of research faculty at the University of Maryland. His research interests include design and development of advanced thermofluid processes, electronic cooling, two-phase flow and fluid flow in porous media. Dr. Shooshtari is the author or co-author of over 20 publications in international journals and conferences. He is a member of ASHARE and ASME. He is recipient of ASHRAE Grant-in-aid Fellowship (2003–2004) and ASHRAE National Capital Chapter Scholarship Award (2003).

Dr. Raphael Mandel

Assistant Research Scientist

Raphael Mandel joined the S2TS lab as an undergraduate research assistant in winter 2010. After graduating with a B.S. in Mechanical Engineering from the University of Maryland in spring 2010, Raphael elected to stay with the S2TS lab as a graduate research assistant in order to pursue his Ph.D. As a graduate student, Raphael has received numerous awards, including the Dean’s Fellowship, ASHRAE Graduate Grant-In-Aid Award, EMERC Hulka Energy Research Fellowship, and L-3 Graduate Fellowship. In addition, Raphael was accepted into the Future Faculty Program and served as a Future Faculty Fellow, where he mentored graduate students and co-taught a course with a faculty member. In his dissertation research, Raphael developed and modeled a novel cooling concept utilizing Film Evaporation with Enhanced fluid Delivery System (FEEDS), capable of achieving high heat fluxes (>1kW/cm2) and heat densities (>490W/cm3) at high vapor qualities (>85%) and moderate pressure drops. He is currently employed as an Assistant Research Scientist in S2TS, where he serves as technical lead on numerous projects, and has authored or co-authored more than 25 publications in international journals and conferences.

Dr. Ratnesh Tiwari

Assistant Research Professor

Dr. Ratnesh Tiwari received his Ph.D. in Mechanical Engineering from University of Maryland in 2015. He received his undergraduate degree from the Indian Institute of Technology (IIT) Kanpur, India in 2006. Prior to joining the University of Maryland, Dr. Tiwari has worked in the process and oil and gas industry for more than six years in the area of Heat Exchanger design and process development. He has extensive experience of designing experimental loops related to thermo fluidic systems, microchannel heat exchangers and micro reactor design and building energy modeling. He is currently involved in design and development of low cost microchannel heat exchangers for industrial system. He is also working on techno economic analysis and market analysis of the ongoing research projects.

Soumya Agrawal

Assistant Faculty

Soumya completed his M.Eng in Mechanical Engineering from UMD. He obtained his bachelor’s degree in Mechanical Engineering from RGPV University. He is working as a Faculty Assistant for the Project of Energy Audit. His work involved Energy Utility analysis, modeling using eQuest software and proposing Energy conservation measures (ECMs).  

Soham Joshi

Assistant Faculty

Soham started working with the S2TS lab in April 2020 – on projects with the Office of Energy & Sustainability, where he continued to work until graduation from UMD with a master’s degree in Mechanical Engineering – Energy & Environment, in December 2020, and resumed working with the lab after graduation – on their energy audit projects.


Sevket Yuruker

Sevket obtained his BSc in Mechanical Engineering in 2015 from Ozyegin University – Turkey, with his thesis focusing on optothermal characterization of LEDs. He was then admitted to University of Maryland as a graduate research assistant and completed his MSc in 2017 focusing on thermoelectric cooling of high heat flux hotspots. After working as a thermal engineer at a private aerospace company in Turkey, he joined SSTS in 2018 to pursue his PhD in Mechanical Engineering. His current research topic is modeling and experimental characterization of manifold microchannel systems for cooling of high power electronics.

Zhengda Yao

Zhengda Yao joined S2TS lab as a Ph.D. student in Mechanical Engineering in 2019 after completing his B.S. in Harbin Engineering University. In the fourth year of his Undergraduate degree, he conducted simulations based on turbulent flow.  In University of Maryland, his field is about computational fluid dynamics and experiments about additive manufacturing. Currently, he is working on topology optimizations of heart exchangers with CFD Software.  

Gargi Kailkhura

Gargi Kailkhura is currently pursuing Ph.D. in Mechanical Engineering as a Graduate Research Assistant at S2ST, since Spring 2018. She works on the Design, Testing and Analysis of Composite Polymer Heat Exchangers (HX) with varied applications like for electronics and power plants cooling. Her research includes optimization of HX, performing its CFD simulations and conducting experimental testing of the HX. She is also a student member of ASME and ASHRAE. She completed her MS from Arizona State University and B.Tech. from National Institute of Technology Surat, India.

Harsimranjit Singh

Harsimranjit received his bachelor’s degree in Aerospace Engineering from PEC University of Technology, Chandigarh, India. He pursued his Master’s degree in mechanical engineering at New Jersey Institute of Technology, Newark.  Before joining UMD as a doctoral student, he worked on synthesis and characterization of fuel cell cathode catalyst material. Primarily, he worked on the characterization of stability and durability of metal-free catalysts for oxygen reduction reactions in alkaline medium.  His research focus at UMD  is ultra-high flux two-phase cooling of laser diodes.

Veeresh Ayyagari

Veeresh received his Bachelors degree from SVNIT, Surat India in 2015. He worked at Larsen & Toubro, Mumbai for 2 years as a Mechanical Design Engineer. He joined University of Maryland in 2017 to pursue a masters in mechanical engineering. His master’s thesis was focused on the design of Atmospheric Water Harvesters. Veeresh joined S2TS as a Graduate Research Assistant in spring 2021 to pursue a Phd in Mechanical Engineering.  At S2TS he will be working on Thermal energy storage systems and Additive manufacturing of Composite Polymer Heat Exchangers.


Rohit Choudhary

Rohit is currently working as a Graduate Research Assistant
for the S2TS lab, in the Energy & Sustainability Data
Department as a Data Assistant. He is pursuing his Master’s
in Software Engineering from the University of Maryland. He
received his Bachelor’s degree in Computer Science from
Symbiosis University, India.

Ji ‘Joe’ Bae

Ji is currently pursuing his M.S. in Mechanical Engineering from UMD. He obtained his bachelor’s degree in Mechanical Engineering from UMD as well. He is currently working as a Graduate Research Assistant for the Project of Energy Audit on Maryland Government Buildings. Ji is also currently employed full-time 
as a Mechanical Engineer at an MEP engineering consulting firm called CMTA, which is located in Arlington, VA.

Oluwaferanmi Kolade Akinpelu

Feranmi Akinpelu is one of the students in the Energy Audit Team. He is currently pursuing M.Eng in Energy Systems Engineering from UMD. He obtained his bachelor’s degree in Petroleum & Natural Gas Engineering from Penn State University (May 2020). He is currently working as a Graduate Research Assistant for the Project of Energy Audit.

Winston Wang

Winston graduated with his B.S. in Mechanical Engineering at UMD in 2020. And he is currently pursuing his M.Eng. in Mechanical Engineering focusing on Energy and the Environment. He is currently working as a Graduate Assistant in the S2T2 lab for the Maryland Executive Order on energy saving on all Maryland state buildings and he is working directly with the Department of General Services on energy-related data.


Alexander Dessiatoun

Alexander Dessiatoun, also known as Sasha, is an undergraduate research assistant for the S2TS lab. He is currently an undergraduate student in the mechanical engineering field. His work focuses on helping graduate students with experimental test setups, research, and design implementation.


Akash Dewan

Akash has been working as a Website and Developer and Administrative Assistant with the ST2S lab since June 2020. He is currently pursuing his Masters in Advanced Engineering in Cybersecurity. He has over 3 years of work experience as an Application Security Analyst and a Systems Engineer. He is an alumni of Guru Gobind Singh Indraprastha University, New Delhi, India where he graduated from in 2016 as a Computer Science Engineer.

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