Mark Daugherty, Ph.D.
Adjunct Associate Professor
- Milwaukee WI UNITED STATES
- Mechanical Engineering
Mark Daugherty is an expert in advanced energy; research and development; and entrepreneurship and startups.
Education, Licensure and Certification
Ph.D.
Mechanical Engineering, Minor-Nuclear Engineering
University of Wisconsin-Madison
1991
J.D.
Environmental Law
University of California, Berkeley
1984
M.S.
Mechanical Engineering
University of Wisconsin-Madison
1980
B.S.
Mechanical Engineering
University of Wisconsin-Madison
1978
Biography
Areas of Expertise
Accomplishments
Award for Excellence in Industrial Partnership
Los Alamos National Laboratory
R & D 100 Award
Superconductivity, Inc
Affiliations
- New Education World Institute : Board Member
- American Society of Mechanical Engineers (ASME) : Member
- Ecology Law Quarterly : Associate Editor
- State Bar of California: Attorney
Social
Selected Publications
Ramp rate testing of an HTS high gradient magnetic separation magnet
Advances in Cryogenic EngineeringDaugherty, M.A., Roth, E.W., Daney, D.E., Hill, D.D., Prenger, F.C.
1998
We report on the ramp rate testing of a prototype high temperature superconducting (HTS) high gradient magnetic separation (HGMS) magnet. HGMS magnets asre ramped from full field to zero field to clean the separation matrix. The time spent ramping the magnet is unavailable for processing and must therefore be kept to a minimum. Existing commercial low temperature superconducting HGMS magnets are immersed in a liquid helium bath and are designed to ramp from zero to full current in one minute. The HTS magnet in our system is conductively cooled and operates in a vacuum at a temperature of approximately 30 K.
High Gradient Magnetic Separation Using a High Temperature Superconducting Magnet,
Applied SuperconductivitySelvaggi, J.A., Cottrell, D.L., Falconer, T.H., Daugherty, M.A., Daney, D.E., Hill, D.D., Prenger, F.C.
1998
We report on the operation and testing of a high temperature superconducting (HTS) high gradient magnetic separator (HGMS). The separator magnet is made of 624 m of Silver/BSCCO HTS wire and has overall dimensions of 18 cm OD, 15.5 cm height and 5 cm ID. HTS current leads are used to reduce the heat leak to the magnet. The system operates in a vacuum and is cooled by a two stage Gifford–McMahon cryocooler. A series of HGMS experiments were performed using this system to demonstrate the performance of HTS magnetic separators.
HTS high gradient magnetic separation system
IEEE Transactions on Spplied SuperconductivityDaugherty, M.A., Coulter, J.Y., Hults, W.L., Daney, D.E., Hill, D.D., McMurry, D.E., Martinez, M.C., Phillips, L.G., Willis, J.O., Boenig, H.J., Prenger, F.C.
1997
We report on the assembly, characterization and operation of a high temperature superconducting (HTS) magnetic separator. The magnet is made of 624 m of Silver/BSCCO superconducting wire and has overall dimensions of 18 cm OD, 15.5 cm height and 5 cm ID. The HTS current leads are designed to operate with the warm end at 75 K and the cold end at 27 K. The system operates in a vacuum and is cooled by a two stage Gifford-McMahon cryocooler. The upper stage of the cryocooler cools the thermal shield and two heat pipe thermal intercepts. The lower stage of the cryocooler cools the HTS magnet and the bottom end of the HTS current leads. The HTS magnet was initially characterized in liquid cryogens. We report the current-voltage (I-V) on characteristics of the HTS magnet at temperatures ranging from 15 to 45 K. At 40 K the magnet can generate a central field of 2.0 T at a current of 120 A.
Assembly and testing of a composite heat pipe thermal intercept for HTS current leads
Advances in Cryogenic EngineeringDaugherty, M.A., Daney, D.E., Prenger, F.C., Hill, D.D., Williams, P.M., Boenig, H.J.
1996
We are building high temperature superconducting (HTS) current leads for a demonstration HTS high gradient magnetic separation (HGMS) system cooled by a cryocooler. The current leads are entirely conductively cooled. A composite nitrogen heat pipe provides efficient thermal communication, and simultaneously electrical isolation, between the lead and an intermediate temperature heat sink. Data on the thermal and electrical performance of the heat pipe thermal intercept are presented. The electrical isolation of the heat pipe was measured as a function of applied voltage with and without a thermal load across the heat pipe. The results show the electrical isolation with evaporation, condensation and internal circulation taking place in the heat pipe.
A comparison of hydrogen vehicle storage options using the EPA urban driving schedule
Advances in Cryogenic EngineeringDaugherty, M.A., Prenger, F.C., Daney, D.E., Hill, D.D., Edeskuty, F.J.
1996
The three standard options for the storage of hydrogen fuel on passenger vehicles are compressed gas, metal hydride and cryogenic liquid storage. The weight of the hydrogen storage system affects the performance of the vehicle. We examine vehicle performance as a function of hydrogen storage system type and capacity. The impact of storage system volume on vehicle performance is not addressed in this paper. Three vehicles are modeled, a metro commuter, a mid size sedan and a full size van. All vehicles are powered by a fuel cell and an electric drive train. The impact of auxiliary power requirements for air conditioning is also examined. In making these comparisons it is necessary to assume a driving cycle. We use the United States Environmental Protection Agency (EPA) urban dynamometer driving schedule in all simulations to represent typical urban driving conditions.
