[1] Santa Clara Univ, Mech Engn Dept, Santa Clara, CA 95053 USA
[2] Calif State Polytech Univ Pomona, Mech Engn Dept, Pomona, CA 90066 USA
[3] Natl Renewable Energy Lab, Golden, CO 80111 USA
[4] Mississippi State Univ, Mech Engn Dept, Mississippi State, MS 39762 USA