Behavior of thermoelectric generators exposed to transient heat sources

Nguyen, Nguyen Q.; Pochiraju, Kishore

doi:10.1016/j.applthermaleng.2012.08.050

Cited by 82 publications

(45 citation statements)

References 16 publications

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“…Therefore, researchers suggested and proved the use of finite element tool to solve such complexity, whereby the characteristics of TEG and their relationship to its performance can be well analysed. Additionally, the behaviour of power generation from TEG exposed to a transient heat source on the hot side and natural convection on the cold side are studied [35].…”

Section: Important Parameters Of Te Modulementioning

confidence: 99%

A comprehensive review of thermoelectric technology: Materials, applications, modelling and performance improvement

Twaha

Zhu

Yan

et al. 2016

Renewable and Sustainable Energy Reviews

482

208

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Abstract:Thermoelectric (TE) technology is regarded as alternative and environmentally friendly technology for harvesting and recovering heat which is directly converted into electrical energy using thermoelectric generators (TEG). Conversely, Peltier coolers and heaters are utilized to convert electrical energy into heat energy for cooling and heating purposes The main challenge lying behind the TE technology is the low efficiency of these devices mainly due to low figure of merit (ZT) of the materials used in making them as well as improper setting of the TE systems. The objective of this work is to carry out a comprehensive review of TE technology encompassing the materials, applications, modelling techniques and performance improvement. The paper has covered a wide range of topics related to TE technology subject area including the output power conditioning techniques. The review reveals some important critical aspects regarding TE device application and performance improvement. It is observed that the intensified research into TE technology has led to an outstanding increase in ZT, rendering the use TE devices in diversified application a reality. Not only does the TE material research and TE device geometrical adjustment contributed to TE device performance improvement, but also the use of advanced TE mathematical models which have facilitated appropriate segmentation TE modules using different materials and design of integrated TE devices. TE devices are observed to have booming applications in cooling, heating, electric power generation as well as hybrid applications. With the generation of electric energy using TEG, not only does the waste heat provide heat source but also other energy sources like solar, geothermal, biomass, infra-red radiation have gained increased utilization in TE based systems.However, the main challenge remains in striking the balance between the conflicting parameters; ZT and power factor, when designing and optimizing advanced TE materials.Hence more research is necessary to overcome this and other challenge so that the performance TE device can be improved further.

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Section: Important Parameters Of Te Modulementioning

confidence: 99%

A comprehensive review of thermoelectric technology: Materials, applications, modelling and performance improvement

Twaha

Zhu

Yan

et al. 2016

Renewable and Sustainable Energy Reviews

482

208

View full text Add to dashboard Cite

show abstract

“…To simplify reporting, sometimes, T h is measured and reported vs. time and then imposed on the model. 42 . Additionally, it has be found 21 that 1 to 5 significant figures should be used when reporting parameters in order to reproduce transient supercooling results to one decimal place accuracy.…”

Section: T Rmentioning

confidence: 99%

Peltier Supercooling with Isosceles Current Pulses: A Response Surface Perspective

Piggott

Allen

2017

ECS J. Solid State Sci. Technol.

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Using a pulsed electrical current enables a temporary state in which a Peltier element achieves temperatures below that obtained with a steady current. This is referred to as supercooling. Supercooling is followed by a period of superheating during which Peltier heat transfer is diminished and the surface temperatures increases. Most studies have found that the duration of superheating is longer than the duration of supercooling. As a result, the current pulse generates a net heating instead of enhanced cooling. There are limited studies that have shown the possibility of net cooling during a current pulse. The objective of this paper is to discuss the operating conditions for which net cooling is possible and maximized. The interaction between pulse duration and pulse height using isosceles shaped current pulses on net cooling was investigated using response surfaces generated using electrical-thermal analogies in SPICE. Pulse duration ranged from 0.1 to 10.0 seconds and pulse height ranging from 1.01 to 6.0 times steady current. Response surfaces were used to map a variety of performance factors; including the transient time to achieve a minimum temperature, the pulse cooling enhancement, transient penalty and transient advantage. The optimal combination of pulse duration and pulse height was identified.

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“…Cold side temperature data from [3] is used for the transient analysis of both single TEG and multiple TEGs arrangement. The hot side temperature is fixed at 115 C.…”

Section: Transient Analysis Of a Single Tegmentioning

confidence: 99%

“…In [2] the author converts some of the condenser wasted energy to electricity by using Bi 2 Te 3 as thermoelectric material and also focuses on the steady state analysis. According to Nguyen and Pochiraju in [3], although there are a number of papers discussing TEG modules, including analytical and numerical steady state models, fully coupled and complete transient analyses of TEG are often not been discussed. Crane [4] also discussed on the transient operating model for the application of segmented thermoelectric elements.…”

Section: Introductionmentioning

confidence: 99%