Experimental investigation of an organic Rankine cycle with liquid-flooded expansion and R1233zd(E) as working fluid

Li, Xiaoya; Lecompte, Steven; Nieuwenhuyse, Jera Van; Couvreur, Kenny; Tian, Hua; Shu, Gequn; Paepe, Michel De; Markides, Christos N.

doi:10.1016/j.enconman.2021.113894

Cited by 24 publications

(3 citation statements)

References 42 publications

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“…The results indicate that the basic ORC system has a higher heat source temperature utilization than the regenerative ORC system [19]. With R1233zd(E) as working fluid, Li et al [20] also constructed another experimental test facility based on a conventional recuperative ORC system. A single-screw expander was employed as the expansion device.…”

Section: Introductionmentioning

confidence: 99%

Experimentally Identifying the Influences of Key Parameters for an Organic Rankine Cycle Using R123

Gao

Song

et al. 2023

Sustainability

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As an efficient energy conversion technology, the organic Rankine cycle (ORC) has been widely applied in medium- and low-grade heat sources. In order to explore the experimental performance of ORC and reveal the effects of operation parameters, an experimental setup was built and R123 was selected as the working fluid. In the experiments, the heat source temperature as well as the mass flow rates of the working fluid and cooling water were controlled. Under the design conditions, the net work and cycle efficiency can, respectively, reach up to 0.55 kW and 8.7%. As for the influences of key parameters, with the increase in heat source temperature from 130 °C to 160 °C, the involved heat has a small increase, while the net work increases from 0.44 kW to 0.55 kW, and the cycle efficiency greatly increases from 6.71% to 8.72% at a mass flow rate of working fluid 25 g/s. As for the mass flow rate of cooling water, it has a similar impact on the cycle performances. The difference is that the effect of the cooling water rate is relatively smaller. At the mass flow rate 25 g/s, when the cooling water rate increases from 0.68 kg/s to 0.83 kg/s, the net work varies from 0.46 kW to 0.55 kW, the cycle efficiency increases in the range 7.41~9.4%. Furthermore, except cycle efficiency, all performances are proportional to the mass flow rate of working fluid. In the test range, the difference of cycle efficiency among different mass flow rates is less than 0.7%.

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Section: Introductionmentioning

confidence: 99%

Experimentally Identifying the Influences of Key Parameters for an Organic Rankine Cycle Using R123

Gao

Song

et al. 2023

Sustainability

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“…Li et al [229] also published an expander-focused study, exploring the concept of flooded expansion as a means to improve ORC efficiency. Several historical efforts have considered a type of flooded expansion for scroll expanders [230,231], yet this study belongs to a smaller group focusing on screw expanders [232].…”

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confidence: 99%

Review of Organic Rankine Cycles for Internal Combustion Engine Waste Heat Recovery: Latest Decade in Review

Sprouse

2024

Sustainability

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The last decade (2013–2023) was the most prolific period of organic Rankine cycle (ORC) research in history in terms of both publications and citations. This article provides a detailed review of the broad and voluminous collection of recent internal combustion engine (ICE) waste heat recovery (WHR) studies, serving as a necessary follow-on to the author’s 2013 review. Research efforts have targeted diverse applications (e.g., vehicular, stationary, and building-based), and it spans the full gamut of engine sizes and fuels. Furthermore, cycle configurations extend far beyond basic ORC and regenerative ORC, particularly with supercritical, trilateral, and multi-loop ORCs. Significant attention has been garnered by fourth-generation refrigerants like HFOs (hydrofluoroolefins), HFEs (hydrofluoroethers), natural refrigerants, and zeotropic mixtures, as research has migrated away from the popular HFC-245fa (hydrofluorocarbon). Performance-wise, the period was marked by a growing recognition of the diminished performance of physical systems under dynamic source conditions, especially compared to steady-state simulations. Through advancements in system control, especially using improved model predictive controllers, dynamics-based losses have been significantly reduced. Regarding practically minded investigations, research efforts have ameliorated working fluid flammability risks, limited thermal degradation, and pursued cost savings. State-of-the-art system designs and operational targets have emerged through increasingly sophisticated optimization efforts, with some studies leveraging “big data” and artificial intelligence. Major programs like SuperTruck II have further established the ongoing challenges of simultaneously meeting cost, size, and performance goals; however, off-the-shelf organic Rankine cycle systems are available today for engine waste heat recovery, signaling initial market penetration. Continuing forward, next-generation engines can be designed specifically as topping cycles for an organic Rankine (bottoming) cycle, with both power sources integrated into advanced hybrid drivetrains.

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“…The utilization of ubiquitous low-grade heat from industrial or geothermal sources for electric power generation is a promising way to produce zero-emission clean energy . Many heat-to-electricity conversion technologies have been attractive in the past a few decades including solid-state thermoelectrics (TEs) and organic Rankin cycles (ORCs). − However, the low Seebeck coefficient (below 200 μV/K) and limited heat-to-electricity efficiency at low temperature regime (below 100 °C) of TEs and high complexity of ORCs system hinder their application in low-grade heat energy harvesting. − Thermally regenerative electrochemical cycle (TREC) is an alternative approach based on the temperature dependence of cell voltage of electrochemical systems, which has a great potential in low-grade heat harvesting for its high energy conversion efficiency. − …”

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confidence: 99%

Engineering of Solvation Entropy by Poly(4-styrenesulfonic acid) Additive in an Aqueous Electrochemical System for Enhanced Low-Grade Heat Harvesting

Lee

et al. 2023

Nano Lett.

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The thermally regenerative electrochemical cycle (TREC) is a reliable and efficient approach to converting low-grade heat into electricity. A high temperature coefficient (α) is the key to maximize the energy conversion efficiency of the TREC system. In this study, we present significant improvement of α of a Prussian blue analogue (PBA)-based electrochemical cell by adding poly(4-styrenesulfonic acid) (PSS) to the electrolyte. Raman spectra showed that water-soluble charged polymers strongly affect the ion hydration structure and increase the entropy change (ΔS) during ion intercalation in PBA. A large α of −2.01 mV K–1 and high absolute heat-to-electricity conversion efficiency up to 1.83% was achieved with a TREC cell in the temperature range 10–40 °C. This study provides a fundamental understanding of the origin of α and a facile method to boosting the temperature coefficient for building a highly efficient low-grade heat harvesting system.

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Experimental investigation of an organic Rankine cycle with liquid-flooded expansion and R1233zd(E) as working fluid

Cited by 24 publications

References 42 publications

Experimentally Identifying the Influences of Key Parameters for an Organic Rankine Cycle Using R123

Experimentally Identifying the Influences of Key Parameters for an Organic Rankine Cycle Using R123

Review of Organic Rankine Cycles for Internal Combustion Engine Waste Heat Recovery: Latest Decade in Review

Engineering of Solvation Entropy by Poly(4-styrenesulfonic acid) Additive in an Aqueous Electrochemical System for Enhanced Low-Grade Heat Harvesting

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