Oct
17
Thu
Amgen Seminar Series in Chemical Engineering – Dr. Stephen J. Kmiotek @ Cherry Auditorium, Kirk Hall
Oct 17 @ 12:45 pm – 1:45 pm

Chemical Process Safety in the Chemical Engineering Curriculum

Speaker

Dr. Stephen J. Kmiotek
Chemical Engineering Department, Worcester Polytechnic Institute


Overview

In 2011, ABET modified its accreditation criteria for Chemical Engineering programs to include “….. the hazards associated with (chemical, physical and/or biological) processes.” The new criterion was added in large part because of continued serious process safety incidents within the chemical industry and, based on the incident investigations, an apparent lack of understanding of these hazards by chemical engineering graduates. ABET left it to universities to address how best to meet the criterion at their institutions. Despite resources provided by, for instance, the Center for Chemical Process Safety, it has proven a challenge to add significant new content to a packed course of study. To address the needs, the chemical engineering faculty turned to their roots: spiraling the core content into the curriculum in foundational courses and turning to project-based learning for a summative experience.

This talk will discuss how we have implemented these process safety requirements within the context of WPI’s program, including examples of some of the projects our students have conducted.

Bio: Dr. Kmiotek is a Professor of Practice in Chemical Engineering at WPI, primarily focused on chemical process safety and environmental issues as they pertain to chemical plant design. Prior to joining the WPI faculty in 2012, he was the Responsible Care Leader for the Dow Chemical Company’s northeast operations, with overall responsibility for environmental, health, safety, industrial hygiene, emergency response, and security at Dow’s northeast manufacturing sites. In total, he has more than 30 years of experience in the chemical industry, and consulting engineering. He has worked and managed operations in manufacturing and in research and development and has designed environmental control systems and process safety systems for companies as diverse as pulp and paper mills, foundries, organic and inorganic chemical manufacturers, and electronics and microelectronics manufacturers throughout North America. At WPI, he is also the Faculty Advisor for Tau Beta Pi and for the student chapter of AIChE. His awards include the 1986 Sigma Xi award for outstanding doctoral research and the 2017 WPI Trustee’s Award for Outstanding Teaching. He holds a PhD in Chemical Engineering from WPI and is a Registered Professional Engineer.


This series at the University of Rhode Island is made possible through the generosity of Amgen, West Greenwich, R.I.

Refreshments provided by the Joseph Estrin Endowment

Oct
24
Thu
Amgen Seminar Series in Chemical Engineering – Dr. Anju Gupta @ Cherry Auditorium, Kirk Hall
Oct 24 @ 12:45 pm – 1:45 pm

Graphene and Copper Coatings for Phase Change Heat Transfer

Speaker

Dr. Anju Gupta
Chemical Engineering Department, Rochester Institute of Technology


Overview

Phase change heat transfer is crucial to various engineering applications. Some prominent examples include distillation reboiler, nuclear reactor, high-powered electronic systems, and  refrigeration. Boiling is a heat transfer process accompanied by phase change from liquid to vapor, subsequently, pool boiling involves the boiling of a stagnant liquid over a heated surface. This talk aims to examine the physical mechanisms of boiling heat transfer that are of prime importance to quantify the efficacy of the process. For various manifestations, the pool boiling performance of a surface is dictated by higher critical heat fluxes and heat transfer coefficients. This talk examines various strategies to create multiscale surface-active engineered surfaces with tunable properties essentially roughness, porosity, hydrophilicity, wickability and wicking rates and their influence on the heat transfer properties. First, several surface engineering methods and the resultant physical properties that can effectively modify the vapor bubble dynamics will be discussed using multiscale graphene coatings as an example. The second part of the talk will focus on electrodeposited graphene nanoplatelet (GNP) enriched copper composite coatings formed systematically by increasing the GNP concentration to yield hierarchal porous structures. These superhydrophilic with very high wicking rates resulted in high critical heat flux (CHF) and heat transfer coefficient (HTC). The copper/2 wt% GNP (weight/volume) composites exceeded the highest pool boiling performance reported in literature with a CHF of 286 W/cm² and HTC of 204 kW/m²-°C, representing an improvement of 130% in CHF and 290% in HTC over a polished copper surface. High thermal conductivity along with improved hydrophilicity and wickability of the copper/GNP coatings are attributed for the enhanced CHF. High-speed images revealed reduced bubble departure diameters and micro-size pores on the electrodeposited surface serving as nucleation sites. The increase in the bubble frequency and delayed formation of vapor blanket resulted in enhanced heat transfer properties.

Bio: Anju Gupta graduated from University of Rhode Island with her doctorate in Chemical Engineering from Geoff Bothun’s laboratory in May 2012. Her Intefacial Thermal and Transport lab studies phase change heat transfer on novel substrates, and transport mechanisms across the cell membrane. Dr Gupta has received funding from NSF, ACS PRF and Ward Ford Foundation and hold two patents. Dr. Gupta is an active member of AIChE , ACS, North American Thermal Analysis Society and ASEE and has published her work in a variety of scientific and education journals.


This series at the University of Rhode Island is made possible through the generosity of Amgen, West Greenwich, R.I.

Refreshments provided by the Joseph Estrin Endowment