Energy and exergy analyses for organic Rankine cycle driven by cooling water of passenger car engine using sixteen working fluids

Elmaihy, Ali; Rashad, Ahmed; Elweteedy, Ahmed; Nessim, Waleed

doi:10.1016/j.ecmx.2023.100415

Cited by 4 publications

(4 citation statements)

References 48 publications

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“…The working fluid usually requires to satisfy the following requirements [16][17][18][19]: (1) The working fluid should meet safety requirements (non-toxic or low toxicity, nonflammable, non-explosive, non-corrosive to pipelines and equipment). (2) The working fluid should be environmentally friendly, that is, it should not cause damage to the ozone layer, and the Ozone Depletion Potential (ODP) should be 0.…”

Section: Primary Selection Of Working Fluidsmentioning

confidence: 99%

Study on the thermodynamic and economic performance of power generation cycle with small temperature difference

Hao,

Liu,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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The low thermal efficiency and low economic benefits of power generation systems under small temperature difference conditions have always hindered their practical operation. In order to explore effective ways to achieve performance optimization of thermodynamic cycle electrical power generating systems under small temperature difference conditions, this study constructs a static analysis model of an organic Rankine cycle with small temperature difference, selects six different commonly used refrigerants, and investigates the influence of key parameters on the thermodynamic and economic performance of the system using difference working fluids. The outcomes indicate that key parameters such as evaporation temperature and condensation temperature play a critical role in the thermodynamic and economic performance of the power generation system. For the working fluids, R227ea provides the highest net power output, while ammonia (R717) is the best performer in regard to system thermal efficiency and economic performance.

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Section: Primary Selection Of Working Fluidsmentioning

confidence: 99%

Study on the thermodynamic and economic performance of power generation cycle with small temperature difference

Hao,

Liu,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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“…where x, A, and I represent coordinates from the hot to the cold junction, cross section, and the electrical current through a thermocouple, respectively. For the two boundary conditions, i.e., T| x=0 = T h and T| x=L = T c , the temperature gradient is obtained at the hot junction from Equation (10) as…”

Section: Teg Efficiencymentioning

confidence: 99%

“…It is broadly categorized into two classes based on the power output mode. Organic Ranking cycles [8][9][10], vapor absorption refrigeration cycles [11][12][13], turbocharging [14,15], turbo-compounding [16,17], and Stirling engines [18,19] are the existing waste recovery systems which consume waste heat as input and create mechanical torque. On the other hand, thermionic generators [20] directly convert the heat energy into an electrical current.…”

Section: Introductionmentioning

confidence: 99%

A Review of Thermoelectric Generators in Automobile Waste Heat Recovery Systems for Improving Energy Utilization

Bhakta,

Kundu

2024

Energies

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With the progress of modern times, automobile technology has become integral to human society. At the same time, the need for energy has also grown. In parallel, the total amount of waste energy that is liberated from different parts of the automobile has also increased. In this ever-increasing energy demand pool, future energy shortages and environmental pollution are the primary concerns. A thermoelectric generator (TEG) is a promising technology that utilizes waste heat and converts it into useful electrical power, which can reduce fuel consumption to a significant extent. This paper comprehensively reviews automobile thermoelectric generators and their technological advancements. The review begins by classifying different waste heat technologies and discussing the superiority of TEGs over the other existing technologies. Then, we demonstrate the basic concept of and advancements in new high-performance TEG materials. Following that, improvements and associated challenges with various aspects, such as the heat exchanger design, including metal foam, extended body, intermediate fluid and heat pipe, leg geometry design, segmentation, and multi-staging, are discussed extensively. Finally, the present study highlights research guidelines for TEG design, research gaps, and future directions for innovative works in automobile TEG technologies.

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“…The ORC's performance comparison utilizing various working agents R600, R245fa, R290, R134a, R123 and R600a was investigated by Thangavel et al (Thangavel, Verma, Tarodiya, & Kaliyaperumal, 2021). Elmaihy et al (Elmaihy, Rashad, Elweteedy, & Nessim, 2023) numerically investigated the ORC's energy and exergy analyzes utilizing various working fluids. They calculated the highest cycle efficiency for R245fa and R123 working fluid.…”

Section: Introductionmentioning

confidence: 99%

Mühendislik Alanında Akademik Analiz ve Tartışmalar

2023

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Mühendislik bilim, teknoloji ve matematiği birbirine bağlamayı amaçlar ve bir disiplin olarak binlerce yıldır uygulanmaktadır. Mühendisler, hücre zarlarından inşaat ve protezlere, motor ve taşıma verimliliğinin iyileştirilmesine ve yenilenebilir enerji kaynaklarının geliştirilmesine kadar her konuda çalışırlar. Mühendislik, tekerleğin icadına (ve ötesine) kadar uzanıyor olsa da, terimin kendisi, bir "mühendis"in mancınık ve diğer "kuşatma makineleri" gibi askeri motorlar inşa eden kişi anlamına geldiği 14. yüzyıla kadar uzanmaktadır. Mühendislik, askeri uygulamaların ötesinde gelişerek köprüler ve binalar gibi sivil yapılara uygulanmaya başlanmıştır. Bu da onu orijinal askeri mühendislik alanından ayırmak için inşaat mühendisliği teriminin yaratılmasına yol açmıştır. Bu kitapta mühendislik bilimleri incelenmiştir.

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Energy and exergy analyses for organic Rankine cycle driven by cooling water of passenger car engine using sixteen working fluids

Cited by 4 publications

References 48 publications

Study on the thermodynamic and economic performance of power generation cycle with small temperature difference

Study on the thermodynamic and economic performance of power generation cycle with small temperature difference

A Review of Thermoelectric Generators in Automobile Waste Heat Recovery Systems for Improving Energy Utilization

Mühendislik Alanında Akademik Analiz ve Tartışmalar

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