Design of plywood and paper flywheel rotors. Final report

Technical Report · Sat May 01 00:00:00 EDT 1982

OSTI ID:6745544

Erdman, A G; Hagen, D L; Gaff, S A

Technical and economic design factors of cellulosic rotors are compared with conventional materials for stationary flywheel energy storage systems. Wood species, operation in a vacuum, assembly and costs of rotors are evaluated. Wound kraft paper, twine and plywood rotors are examined. Two hub attachments are designed. Support stiffness is shown to be constrained by the material strength, rotor configuration and speed ratio. Preliminary duration of load tests was performed on vacuum dried hexagonal birch plywood. Dynamic and static rotor-hub fatigue equipment is designed. Moisture loss rates while vacuum drying plywood cylinders were measured, and the radial and axial diffusion coefficients were evaluated. Diffusion coefficients of epoxy coated plywood cylinders were also obtained. Economics of cellulosic and conventional rotors were examined. Plywood rotor manufacturing costs were evaluated. The optimum economic shape for laminated rotors is shown to be cylindrical. Vacuum container costs are parametrically derived and based on material properties and costs. Containment costs are significant and are included in comparisons. The optimum design stress and wound rotor configuration are calculated for seventeen examples. Plywood rotors appear to be marginally competitive with the steel hose wire or E-glass rotors. High performance oriented kraft paper rotors potentially provide the lowest energy storage costs in stationary systems.

• Research Organization: Minnesota Univ., Minneapolis (USA). Dept. of Mechanical Engineering
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6745544
• Report Number(s): UCRL-15504; ON: DE83002276
• Resource Relation: Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
FLYWHEELS
COST
FABRICATION
PAPER
PHYSICAL PROPERTIES
WOOD
COMPARATIVE EVALUATIONS
FATIGUE
FLYWHEEL ENERGY STORAGE
MATERIALS TESTING
MOISTURE
ENERGY STORAGE
MECHANICAL ENERGY STORAGE EQUIPMENT
MECHANICAL PROPERTIES
STORAGE
TESTING
250500* - Energy Storage- Flywheels
360600 - Other Materials