Lower Grade Waste Heat Recovery

Lower Grade Waste Heat Recovery
December 13-14, 2016 
San Francisco, CA

ARPA-E held a workshop on “Lower Grade Waste Heat Recovery” on December 13-14, 2016 in the San Francisco area. The workshop convened leading experts in waste heat recovery, materials development, and novel solid-state materials technology (emerging compositions, materials synthesis/processing, combinatorial screening/optimization, robust module designs) to identify innovative research paths for the development of next-generation lower grade (<400°C) waste heat recovery systems. Participants lent their expertise to help ARPA-E explore innovative technology pathways and determine relevant and compelling metrics that will define a successful research program. 

ARPA-E is interested in waste heat technologies that enable conversion of lower grade (< 400°C) waste heat from mobile and/or stationary sources. Potential recovery pathways include, but are not limited to: 

Novel pathways toward higher efficiency and/or lower cost per Watt for thermoelectric generator modules and materials

Novel pathways that would enable mechanical systems to be viable in mobile applications

Suitable thermionics for lower grade waste heat recovery

Suitable multiferroic thermoelectrics for lower grade waste heat recovery

Electrochemical approaches

Lower-grade to higher-grade waste heat conversion

Other potentially transformative technology concepts 

Areas of interest and target outcomes include: 

Identification of computational methods that may give predictive or directional insight

Identification of combinatorial technology approaches that might produce new materials or be more effective at producing existing material classes

Identification of appropriate evaluation methods and metrics across applications of interest.

Identification of technical challenges that would need to be overcome

Identification of other innovative technologies that meet the performance objectives.

Tuesday, 12/13



9:00 – 11:00 AM

Individual meetings with Dr. Joseph King and his technical team

11:00 AM – 12:00 PM

Registration Opens

11:30 AM – 12:00 PM

Lunch Served

12:00 PM – 12:15 PM

Welcome and Introduction to ARPA-E

Dr. Ellen Williams, Director, ARPA-E

12:15 - 12:35 PM

Lower Grade Waste Heat Recovery – Goals, Opportunities and Areas of Interest

Dr. Joseph King, Program Director ARPA-E

12:35 - 12:55 PM

Workshop participant introductions

12:55 – 1:20 PM

Thermomagnetics and Multiferroics

Guest Speaker:  Prof. Bharat Jalan, University of Minnesota 

1:20 – 1:45 PM


Guest Speaker: Dr. Patrick Brady, Redwave Energy

1:45 –  2:10 PM


Guest Speaker: Prof. Robert Keolian, Pennsylvania State University 

2:10 – 2:35 PM

Metamaterials and Material Synthesis

Guest Speaker: Dr. Augustine Urbas, Air Force Research Laboratory  

2:35 – 2:50 PM

Breakout 1 Overview

Dr. Joseph King,  ARPA-E

2:50 – 3:15 PM


3:15– 5:15 PM

Breakout Session 1

A: Plaza Room Salon A

B: Union Square 15-16 – 4th Floor

C: Union Square 17-18 – 4th Floor


Wednesday, 12/14



8:00 - 8:10 AM

Day 1 Summary/Readout and Day 2 Objectives

Dr. Joseph King, ARPA-E

8:10 – 8:35 AM

Thermoelectric Generators and Thermionics

Guest Speaker: Prof. Mona Zebarjadi, University of Virginia   

8:35 – 9:00 AM

Heat Transport – Capture and Rejection

Guest Speaker: Prof. Gang Chen, Massachusetts Institute of Technology  

9:00 – 9:25 AM

Mechanical Systems

Guest Speaker: Prof. Todd Bandhauer,  Colorado State University   

9:25 – 9:30 AM

Breakout 2 Overview

Dr. Joseph King, ARPA-E

9:30 – 9:50 AM


9:50 – 11:45 AM

Breakout Session 2

D: Plaza Room Salon A

E: Union Square 15-16 – 4th Floor

F: Union Square 17-18 – 4th Floor

11:45 - 11:50 AM


12:00 – 1:00 PM

Individual meetings with Dr. Joseph King and his technical team