Development of MEMS based pyroelectric thermal energy harvesters

Conference · Sat Jan 01 04:00:00 EST 2011

OSTI ID:1025393

Hunter, Scott Robert ^[1]; Lavrik, Nickolay V ^[1]; Bannuru, Thirumalesh ^[1]; Mostafa, Salwa ^[1]; Rajic, Slobodan ^[1]; Datskos, Panos G ^[1]

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1. ORNL

The efficient conversion of waste thermal energy into electrical energy is of considerable interest due to the huge sources of low-grade thermal energy available in technologically advanced societies. Our group at the Oak Ridge National Laboratory (ORNL) is developing a new type of high efficiency thermal waste heat energy converter that can be used to actively cool electronic devices, concentrated photovoltaic solar cells, computers and large waste heat producing systems, while generating electricity that can be used to power remote monitoring sensor systems, or recycled to provide electrical power. The energy harvester is a temperature cycled pyroelectric thermal-to-electrical energy harvester that can be used to generate electrical energy from thermal waste streams with temperature gradients of only a few degrees. The approach uses a resonantly driven pyroelectric capacitive bimorph cantilever structure that potentially has energy conversion efficiencies several times those of any previously demonstrated pyroelectric or thermoelectric thermal energy harvesters. The goals of this effort are to demonstrate the feasibility of fabricating high conversion efficiency MEMS based pyroelectric energy converters that can be fabricated into scalable arrays using well known microscale fabrication techniques and materials. These fabrication efforts are supported by detailed modeling studies of the pyroelectric energy converter structures to demonstrate the energy conversion efficiencies and electrical energy generation capabilities of these energy converters. This paper reports on the modeling, fabrication and testing of test structures and single element devices that demonstrate the potential of this technology for the development of high efficiency thermal-to-electrical energy harvesters.

• Research Organization: Oak Ridge National Laboratory (ORNL); Center for Nanophase Materials Sciences
• Sponsoring Organization: ORNL LDRD Director's R&D
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1025393
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
COMPUTERS
EFFICIENCY
ELECTRICITY
ENERGY CONVERSION
FABRICATION
MONITORING
ORNL
SECURITY
SENSORS
SIMULATION
SOLAR CELLS
TEMPERATURE GRADIENTS
TESTING
WASTE HEAT
WASTES