Performance assessment and parametric study of a hybrid system consisting of an alkali metal thermoelectric converter and an absorption refrigerator

Wang, Yuan; Zhang, Houcheng; Hao, Haoshan; Li, Haidong

doi:10.1016/j.enconman.2019.03.064

Cited by 25 publications

(6 citation statements)

References 35 publications

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“…With the increase of

β

, the maximum power density

P_{m}^{*}

increases remarkably from 0.4730 to 0.7381 W/cm 2 , and the temperature of the condenser

T_{italicco}

is 646.5 K when

β = \infty

, indicating that more heat energy is wasted. Those heats can be efficiently used to further power thermoelectric converters 46 and absorption refrigerators 47 . Table 6 lists the maximum efficiency and the corresponding parameters for different

β

.…”

Section: Resultsmentioning

confidence: 99%

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A cost‐efficient path to utilize coal via solid oxide fuel cells and alkali metal thermoelectric converters

Yang

Ren

Zhang

2022

Intl J of Energy Research

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In addition to directly burning in firepower plants, coal can be alternatively gasified into gaseous carbon monoxide and then fed into solid oxide fuel cells for efficient power generation. Carbon monoxide solid oxide fuel cells (CO-SOFCs) not only avoid the drawbacks of expensive hydrogen fuel but also facilitate carbon dioxide's separation and enrichment. In this paper, an integrated system is first presented to efficiently recycle the waste heat released from CO-SOFCs via alkali metal thermoelectric converters (AMTECs) for additional electricity generation. Key performance indicators such as power density and energy efficiency are mathematically expressed by including the heat-transfer losses between heat sources and AMTEC. The maximum power density of the integrated system gains 18% improvement compared with that of the sole CO-SOFC. The maximum efficiency can reach 60.84%. The optimum ranges of the current density, efficiency, and power density for the whole integrated system are determined. Furthermore, the influences of the fuel cell temperature on the optimum ranges are also studied. The correlations between the critical parameters and the maximum power density and efficiency of the system are revealed. The maximum power density and efficiency as well as the corresponding parameters are calculated numerically. The findings show that waste heat can be recycled efficiently by employing AMTECs. Novelty Statement• A numerical model of the CO-SOFC/AMTEC integrated system is established.• The maximum efficiency of the hybrid system can reach 60.84%.• The optimum ranges of key parameters are determined and discussed.

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“…With the increase of

β

, the maximum power density

P_{m}^{*}

increases remarkably from 0.4730 to 0.7381 W/cm 2 , and the temperature of the condenser

T_{italicco}

is 646.5 K when

β = \infty

β

.…”

Section: Resultsmentioning

confidence: 99%

“…Those heats can be efficiently used to further power thermoelectric converters 46 and absorption refrigerators. 47 increase of j fc . The higher j fc increases the total energy Δ _ H released by the CO-SOFC.…”

Section: Parameters Valuesmentioning

confidence: 94%

A cost‐efficient path to utilize coal via solid oxide fuel cells and alkali metal thermoelectric converters

Yang

Ren

Zhang

2022

Intl J of Energy Research

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“…Söylemez et al developed and evaluated hybrid refrigerators, which include vapor compression and thermoelectric cooling; the test results showed that the hybrid refrigerators had at least three times higher energy consumption levels over the serial ones due to lower operating efficiencies of the TECs and higher transmission losses [10]. Yuan Wang et al presented a model to establish the energy conversion efficiency of an alkali metal thermoelectric converter (AMTEC) by combining it with an absorption refrigerator (AR) [11]. Finally, in 2011 Zheng et al presented a review of TEC in vehicular heating and cooling, medical service, the food industry, and electronic devices [12].…”

Section: Theoretical Framework 21 Overview Of Thermoelectric Generatorsmentioning

confidence: 99%

Recent Developments in Thermoelectric Generation: A Review

Sanin-Villa

2022

Sustainability

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The world’s growing energy demand poses several concerns regarding the rational and efficient use of energy resources. This is also the case for many industrial processes, where energy losses and particularly thermal losses are common. Thermoelectric generators offer an alternative to address some of these challenges by recovering wasted heat and thereby increasing the overall efficiency of these processes. However, the successful operation of the thermoelectrical modules meant to carry this process is only possible when pairing these to an external control system; such a system plays an important role in predicting and operating such modules at its maximum power point. In this review paper, recent developments in the field of thermoelectric technology are discussed along with their mathematical models, applications, materials, and auxiliary devices to harvest thermal energy. Moreover, new advancements in phenomenological models are also discussed and summarized. The compiled evidence shows that the thermal dependence properties on the thermoelectric generator material’s modules and the mismatching thermal conditions play an important role in predicting power output in those systems, which prove the importance of including those parameters to enhance the accuracy of the energy production prediction. In addition, based on the evaluation of the mathematical models, it is shown that more studies are required to fill the gap between the current state-of-the-art of the technology and adjacent modeling techniques for the design and evaluation of thermal energy harvesting systems employing thermoelectric arrays under mismatching thermal conditions.

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“…On the other hand, the tactics to enhance the performance of the Na-TEC was to employ the exhaust heat released from the condenser. Various coupled devices combined the Na-TEC with a bottoming subsystem were established [14][15][16][17][18]. For example, Wang et al [14] established a system which is an absorption refrigerator driven by a Na-TEC and obtained the MEFs of the integrated system and stand-alone Na-TEC are 0.392 and 0.266, respectively.…”

Section: Introductionmentioning

confidence: 99%

A two-stage sodium converter coupled to a two-stage TEG: Parametric optimization

Peng

González-Ayala

Guo

et al. 2023

Applied Thermal Engineering

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Performance assessment and parametric study of a hybrid system consisting of an alkali metal thermoelectric converter and an absorption refrigerator

Cited by 25 publications

References 35 publications

A cost‐efficient path to utilize coal via solid oxide fuel cells and alkali metal thermoelectric converters

A cost‐efficient path to utilize coal via solid oxide fuel cells and alkali metal thermoelectric converters

Recent Developments in Thermoelectric Generation: A Review

A two-stage sodium converter coupled to a two-stage TEG: Parametric optimization

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