Cyclic energy harvesting from pyroelectric materials

Mane, Poorna; Xie, J.; Leang, Kam K.; Mossi, Karla

doi:10.1109/tuffc.2011.1769

Cited by 75 publications

(61 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Assuming a homogeneous pyroelectric material (constant pyroelectric coefficient) throughout which the temperature T at any time is uniform, the electric current generated (Figure 11c,d) from the pyroelectric effect is given as [104,105]:

i_{p} = \frac{d Q}{d t} = p A \frac{d T}{d t}

where Q denotes the pyroelectric charge,

i_{p}

represents the pyroelectric current, A is the surface area of the pyroelectric material, and

\frac{d T}{d t}

is the rate of temperature change. It should be noted that the current obtained from Equation (21) is under a short circuit condition and the electrodes of the capacitor are positioned as normal to the polar direction.…”

Section: Pyroelectric Energy Harvestingmentioning

confidence: 99%

A Review on Low-Grade Thermal Energy Harvesting: Materials, Methods and Devices

2018

View full text Add to dashboard Cite

Combined rejected and naturally available heat constitute an enormous energy resource that remains mostly untapped. Thermal energy harvesting can provide a cost-effective and reliable way to convert available heat into mechanical motion or electricity. This extensive review analyzes the literature covering broad topical areas under solid-state low temperature thermal energy harvesting. These topics include thermoelectricity, pyroelectricity, thermomagneticity, and thermoelasticity. For each topical area, a detailed discussion is provided comprising of basic physics, working principle, performance characteristics, state-of-the-art materials, and current generation devices. Technical advancements reported in the literature are utilized to analyze the performance, identify the challenges, and provide guidance for material and mechanism selection. The review provides a detailed analysis of advantages and disadvantages of each energy harvesting mechanism, which will provide guidance towards designing a hybrid thermal energy harvester that can overcome various limitations of the individual mechanism.

show abstract

i_{p} = \frac{d Q}{d t} = p A \frac{d T}{d t}

where Q denotes the pyroelectric charge,

i_{p}

represents the pyroelectric current, A is the surface area of the pyroelectric material, and

\frac{d T}{d t}

Section: Pyroelectric Energy Harvestingmentioning

confidence: 99%

A Review on Low-Grade Thermal Energy Harvesting: Materials, Methods and Devices

2018

View full text Add to dashboard Cite

show abstract

“…conventional Stirling devices. The AMR cycle usually performs a kind of regenerative Brayton-like cycle (see, for example [63][64][65][66][67][68][69]). …”

Section: The Amr Thermodynamic Cyclementioning

confidence: 99%

Magnetocaloric Energy Conversion

Kitanovski

Tušek

Tomc

et al. 2015

Green Energy and Technology

245

152

View full text Add to dashboard Cite

show abstract

“…With cyclic heating, the temperature changes were smaller; however, the total energy harvested could accumulate and become larger over time [10]. The present study is focused on optimizing the efficiency of PZT pyroelectric harvesters with consideration of the frequency or work cycle, radiation power, properties and dimensions of the air layer, and the dimensions and structure of the pyroelectric PZT cells.…”

Section: Resultsmentioning

confidence: 99%

Pyroelectric Harvesters for Generating Cyclic Energy

Hsiao

Jhang

2015

Energies

View full text Add to dashboard Cite

Pyroelectric energy conversion is a novel energy process which directly transforms waste heat energy from cyclic heating into electricity via the pyroelectric effect. Application of a periodic temperature profile to pyroelectric cells is necessary to achieve temperature variation rates for generating an electrical output. The critical consideration in the periodic temperature profile is the frequency or work cycle which is related to the properties and dimensions of the air layer; radiation power and material properties, as well as the dimensions and structure of the pyroelectric cells. This article aims to optimize pyroelectric harvesters by matching all these requirements. The optimal induced charge per period increases about 157% and the efficient period band decreases about 77%, when the thickness of the PZT cell decreases from 200 μm to 50 μm, about a 75% reduction. Moreover, when using the thinner PZT cell for harvesting the pyroelectric energy it is not easy to focus on a narrow band with the efficient period. However, the optimal output voltage and stored energy per period decrease about 50% and 74%, respectively, because the electrical capacitance of the 50 μm thick pyroelectric cell is about four times greater than that of the 200 μm thick pyroelectric cell. In addition, an experiment is used to verify that the work cycle to be able to critically affect the efficiency of PZT pyroelectric harvesters. Periods in the range between 3.6 s and 12.2 s are useful for harvesting thermal cyclic energy by pyroelectricity. The optimal frequency or work cycle can be applied in the design of a rotating shutter in order to control the heated and unheated periods of the pyroelectric cells to further enhance the amount of stored energy.

show abstract

Cyclic energy harvesting from pyroelectric materials

Cited by 75 publications

References 36 publications

A Review on Low-Grade Thermal Energy Harvesting: Materials, Methods and Devices

A Review on Low-Grade Thermal Energy Harvesting: Materials, Methods and Devices

Magnetocaloric Energy Conversion

Pyroelectric Harvesters for Generating Cyclic Energy

Contact Info

Product

Resources

About