1. Dept. of Mechanical and Industrial Engineering, Univ. of Illinois at Chicago, 842 W. Taylor St., Chicago, IL 60607.
2. Assistant Professor, Dept. of Mechanical and Industrial Engineering, Univ. of Illinois at Chicago, 842 W. Taylor St., Chicago, IL 60607 (corresponding author).
3. Energy Systems Division, Argonne National Laboratory, 9700 South Cass Ave., Bldg. 362, Argonne, IL 60439.