Comparative double and integer optimization of low-grade heat recovery from PEM fuel cells employing an organic Rankine cycle with zeotropic mixtures

Fakhari, Iman; Gholamian, Ehsan; Ahmadi, Pouria; Arabkoohsar, Ahmad

doi:10.1016/j.enconman.2020.113695

Cited by 76 publications

(9 citation statements)

References 40 publications

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“…and h kJ kg is the enthalpy. Equation (3) describes the building energy model, incorporating internal convective heat gains, transmission heat gains through walls, heat transfer among zones, and infiltration gains [30].…”

Section: Mathematical Modelingmentioning

confidence: 99%

Design and Parametric Investigation of an Efficient Heating System, an Effort to Obtain a Higher Seasonal Performance Factor

2021

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The present work introduces an innovative yet feasible heating system consisting of a ground source heat pump, borehole thermal energy storage, an auxiliary heater, radiators, and ventilation coils. The concept is developed by designing a new piping configuration monitored by a smart control system to reduce the return flow temperature and increase the temperature differential between the supply and return flows. The radiators and ventilation heating circuits are connected in series to provide the heat loads with the same demand. The investigation of the proposed model is performed through developed Python code considering a case study hospital located in Norway. The article presents, after validation of the primary heating system installed in the hospital, a parametric investigation to evaluate the effect of main operational parameters on the performance metrics of both the heat pump and the total system. According to the results, the evaporator temperature is a significant parameter that considerably impacts the system performance. The parametric study findings show that the heat pumps with a thermal capacity of 400 kW and 600 kW lead to the highest heat pump and total seasonal performance factors, respectively. It is also observed that increasing the heat pump capacity does not affect the performance indicators when the condensation temperature is 40 °C and the heat recovery is 50%. Moreover, choosing a heat pump with a smaller capacity at the heat recovery of 75% (or higher) would be an appropriate option because the seasonal performance values are not varied by changing the heat pump capacity. The results reveal that reducing return temperature under a proper parameters selection results in substantially higher seasonal performance factors of the heat pump and total system. These outcomes are in-line with the United Nations sustainable development goals including Sustainable Cities and Communities.

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Section: Mathematical Modelingmentioning

confidence: 99%

Design and Parametric Investigation of an Efficient Heating System, an Effort to Obtain a Higher Seasonal Performance Factor

2021

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“…In order to improve the performance or efficiency, numerous studies have focused on the fuel cell components, such as bipolar plates, gas diffusion layer, flow fields, electrolytes, catalyst, and operating conditions. [52][53][54] Thus, there are lots of work on the fabrication, testing, and optimization of fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…Fuel cell research is multidisciplinary since performance improvements and optimization requires knowledge and techniques from discplines such as; material science, chemistry, industrial engineering, electrical engineering, and mechanical engineering. In order to improve the performance or efficiency, numerous studies have focused on the fuel cell components, such as bipolar plates, gas diffusion layer, flow fields, electrolytes, catalyst, and operating conditions 52‐54 . Thus, there are lots of work on the fabrication, testing, and optimization of fuel cells.…”

Section: Introductionmentioning

confidence: 99%

Four dimensional bio‐inspired optimization approach with artificial intelligence for proton exchange membrane fuel cell

Musharavati

2022

Intl J of Energy Research

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Summary A novel hybrid 4D bio‐inspired optimization combined with an Artificial Neural Network (ANN) is proposed for finding optimal design and operational variables for a fuel cell dynamic model. In addition, a novel classification of fuel cells is proposed which can help designers and decision‐makers to set operational and contractual parameters for their desired purposes. The present article proposes three general clusters of proton exchange membrane fuel cells (PEMFCs), which help designers to choose design parameters for a vast range of applications from hydrogen vehicles to combined power generation plants. After investigating PEMFC design parameters followed by sensitivity analysis, several correlations between PEMFCs design parameters are found. For instance, the correlation between fuel cell active area and membrane thickness for optimized fuel cell units can help designers to ensure that their design is optimized. An ANN model is developed which can be used by others to ascertain in what category their fuel cell stack is.

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“…Hydrogen is the most abundant and simplest element on the earth 1 . Moreover, hydrogen is a potential, clean, and highly effective energy carrier that can be employed in various applications including transportation, fuel cell, and chemical engineering.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen is the most abundant and simplest element on the earth. 1 Moreover, hydrogen is a potential, clean, and highly effective energy carrier that can be employed in Abbreviations: TWSC, thermochemical water splitting cycle; H 2 , hydrogen; H 2 O, water; H 2 SO 4 , sulfuric acid; HI, hydrogen iodide; I 2 , iodine; SO 2 , sulfur dioxide; ORC, organic Rankine cycle; LHV, low heating value; HX, heat exchanger; T, turbine; P, pump; C, compressor. various applications including transportation, fuel cell, and chemical engineering.…”

Section: Introductionmentioning

confidence: 99%

Investigation of hydrogen production by sulfur‐iodine thermochemical water splitting cycle using renewable energy source

Mehrpooya

Ghorbani

Ekrataleshian

et al. 2021

Intl J of Energy Research

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In this study, a novel integrated structure for generation of the oxygen, hydrogen, power, and hot water by employing thermochemical reactors and solar dish collectors is proposed. The presented process including solar dish collectors, sulfuriodine thermochemical cycle, and Organic Rankine Cycle. In this configuration, for 5854 kmol/h of inlet water, 2236 kmol/h of oxygen, and 4432 kmol/h of hydrogen are produced. This system can provide 22 666 kW of power that 22 026 kW is utilized in the sulfur-iodine reaction. So, the net electrical power is found to be 640 kW. A general exergy analysis is carried out on the whole structure and equipment to find its exergy losses and improvement potential to enhance the exergy efficiency of the system. The total exergy efficiency of the process is calculated 56.33% and its exergy destruction is obtained 382 301.31 kW.Heat exchangers and solar collectors have the highest values of destructed exergy, which about 69% of destructed exergy is related to them. These devices have a strong potential for enhancement. The results showed that component P1 (pump) has the lowest exergy efficiency that is 15.58%, while its exergy destruction is not the greatest. Therefore, for having a better examination of this structure, both exergy efficiency and exergy destruction parameters should be evaluated simultaneously. Moreover, a sensitivity analysis is applied to survey the performance of some performance indicators vs different design parameters. It is concluded that by an increase in generated heat by solar collectors, exergy efficiency, energy efficiency, oxygen, and hydrogen production faces increment.

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Comparative double and integer optimization of low-grade heat recovery from PEM fuel cells employing an organic Rankine cycle with zeotropic mixtures

Cited by 76 publications

References 40 publications

Design and Parametric Investigation of an Efficient Heating System, an Effort to Obtain a Higher Seasonal Performance Factor

Design and Parametric Investigation of an Efficient Heating System, an Effort to Obtain a Higher Seasonal Performance Factor

Four dimensional bio‐inspired optimization approach with artificial intelligence for proton exchange membrane fuel cell

Investigation of hydrogen production by sulfur‐iodine thermochemical water splitting cycle using renewable energy source

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