Experimental and theoretical study of thermoelectric generator waste heat recovery model for an ultra-low temperature PEM fuel cell powered vehicle

Sulaiman, M. Saufi; Singh, Baljit; Mohamed, Wan Ahmad Najmi Wan

doi:10.1016/j.energy.2019.05.022

Cited by 82 publications

(31 citation statements)

References 51 publications

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“…In fact, after the discharge at higher current, the LiBr concentration in the H and L solutions is not the same, but the voltage reached the 0 V value due to the ohmic loss that reduces the available energy. In these conditions, the cell was able to deliver 4.9 Wh dm À 3 , The corresponding energy efficiency is thus 30.3 % as calculated by Equation (7). The energy loss is due to the effect of both the charge transfer resistance and the ohmic drop dominated by the ceramic membrane resistance (see Figures S7 and S8 and discussion thereof).…”

Section: Power Density and Discharge Profilementioning

confidence: 88%

“…[3,4] At present day, there are no commercial systems that can harvest this type of energy, reaching satisfactory heat conversion efficiency at an affordable price. Different devices have been proposed, for example, the organic Rankine cycle (ORC) [5] and solid-state thermoelectric system (SST), [6][7][8] but still they have not found a real application in large-scale recovery of LTH due to the low efficiency, high costs [9] and, more important, lack of capacities for energy storage. [10,11] Recently, technologies based on electrochemical cells [12,13] were developed to directly convert LTH in electricity.…”

Section: Introductionmentioning

confidence: 99%

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Thermally Regenerable Redox Flow Battery

et al. 2020

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The efficient production of energy from low-temperature heat sources (below 100°C) would open the doors to the exploitation of a huge amount of heat sources such as solar, geothermal, and industrial waste heat. Thermal regenerable redoxflow batteries (TRBs) are flow batteries that store energy in concentration cells that can be recharged by distillation at temperature < 100°C, exploiting low-temperature heat sources. Using a single membrane cell setup and a suitable redox couple (LiBr/Br 2), a TRB has been developed that is able to store a maximum volumetric energy of 25.5 Wh dm À 3 , which can be delivered at a power density of 8 W m À 2. After discharging 30 % of the volumetric energy, a total heat-to-electrical energy conversion efficiency of 4 % is calculated, the highest value reported so far in harvesting of low-temperature heat.

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Section: Power Density and Discharge Profilementioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Thermally Regenerable Redox Flow Battery

et al. 2020

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“…In the event that all the quantities entering into equation (3) refer to small elements of the body surface, then the average coefficient of heat transfer from the heat transfer surface was determined for each individual experiment, respectively, from the expression [9] to [10]:…”

Section: Methodsmentioning

confidence: 99%

“…The cooling capacity of the thermoelement, taking into account losses, is determined from the expression [10]:…”

Section: Heat Flow Calculation Wmentioning

confidence: 99%

Version of a mathematical model of purge ventilation system with a complex recuperative heat exchanger

Ezhov¹,

Semicheva²,

Tyutyunov³

et al. 2021

J Appl Eng Science

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The aim of the study is to develop a design of an air-heating recuperator for a purge ventilation system of a building inbuilt for the purpose of utilizing lower-grade heat from ventilation gases and emissions with the associated production of thermoelectricity. An experimental design of an air-heating recuperator as part of an experimental purge unit has been developed. It includes a thermoelectric source of electromotive difference, which operates as a result of the associated conversion of heat into electricity, which allows utilizing lower-potential heat of ventilation releases from 40 ° C to 60 ° C.

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“…[13][14][15] At present, it only uses the electric energy generated by the fuel cell. [16][17][18] The internal heat generated by the fuel cell engine is not utilized but discharged directly. 19,20 However, there are few studies on the use of fuel cell waste heat in automobile heating in winter and its impact on automobile economy.…”

Section: Introductionmentioning

confidence: 99%

Research on matching design method of waste heat reuse system of fuel cell vehicle considering system energy consumption and waste heat exchange rate

Sun

et al. 2020

Intl J of Energy Research

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The research of hydrogen fuel cell waste heat recovery is a new field of fuel cell thermal management, which helps to improve the overall fuel utilization. At present, the research on the waste heat utilization of fuel cell vehicles is less, and it is more based on the traditional vehicle waste heat management ideas without systematic summary of the factors affecting the system performance. This study takes the waste heat reuse system of fuel cell vehicle as the research object, and established the waste heat exchange rate model and energy consumption model of the waste heat reuse system. Through the study of relevant parameter variables, the effects of parameters on system energy consumption and waste heat exchange rate at low temperature were obtained. The matching design of waste heat reuse system of 60 kW fuel cell vehicle was carried out, and the simulation analysis and experimental verification were done. The results showed that when the ambient temperature is −3 C and −6 C, the waste heat exchange rate of the new matching scheme is 16.2% and 16.3% higher than that of the original scheme, respectively. Also, the total energy consumption of the system is reduced by 62.02% and 60.62%, respectively.

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Experimental and theoretical study of thermoelectric generator waste heat recovery model for an ultra-low temperature PEM fuel cell powered vehicle

Cited by 82 publications

References 51 publications

Thermally Regenerable Redox Flow Battery

Thermally Regenerable Redox Flow Battery

Version of a mathematical model of purge ventilation system with a complex recuperative heat exchanger

Research on matching design method of waste heat reuse system of fuel cell vehicle considering system energy consumption and waste heat exchange rate

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