Feasibility Assessment of a Dual Intake-Port Scroll Expander Operating in an ORC-Based Power Unit

Fatigati, Fabio; Giovine, Giammarco Di; Cipollone, Roberto

doi:10.3390/en15030770

Cited by 12 publications

(16 citation statements)

References 34 publications

(57 reference statements)

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“…Fatigati et al [14] investigated scroll expanders as novel technology to be integrated into a small-scale power unit with an organic Rankine cycle (ORC). This technology, in the case of small applications, operates in off-design conditions.…”

Section: Other Components For Renewable Applicationsmentioning

confidence: 99%

“…and hybrid bioenergy systems (e.g., heat and power plant with thermal and battery energy storage [12]). Section 3 reviews component enhancement in renewable systems, including heat exchangers (e.g., cooling and thermal recovery devices for photovoltaics [13]) and other components for renewable applications (e.g., scroll expander for ORC [14], nozzle for compressible systems [15]). Section 4 collects papers that address the topic of sustainable development for buildings, including energy supply and demand analysis (e.g., sediment heat energy [16], lifecycle analysis [17]) and lowtemperature direct heating and cooling (DHC) systems [18].…”

Section: Introductionmentioning

confidence: 99%

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Recent Advances in Technologies, Methods, and Economic Analysis for Sustainable Development of Energy, Water, and Environment Systems

et al. 2022

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Sustainability has become a broad societal goal, aiming to ensure that human beings coexist safely and harmoniously with nature over a longer time. The influence of the COVID-19 pandemic on the global economy is coming to an end. The development and merits of sustainable energy supply, advanced technology, and economic features have received significant attention over the last few decades. However, significant gaps still exist with respect to how to design, construct, and implement hybrid and optimal energy systems with the lowest investment and cost. Since 2002, the Sustainable Development of Energy, Water, and Environment Systems (SDEWES) conferences have become a significant meeting venue for researchers to introduce, discuss, share, and disseminate novel concepts and ideas. This paper presents an overview of published articles in the Special Issues (SIs) dedicated by the series SDEWES conferences, especially those published in Energies recommended by the 16th SDEWES Conference, which was held on 10–15 October 2021 in Dubrovnik, Croatia. This SI in Energies focused on four main topics, including the application of renewable bioenergy, component enhancement in renewable systems, sustainable development for buildings and economic analysis and evaluation for sustainability. The collected papers provide insight into the topics related to recent advances in improving sustainable efficiency, including studies on waste-to-wealth techniques, utilization of hybrid bioenergy systems, heat exchangers and other components for performance enhancement, energy supply and demand analysis, low-temperature DHC systems, techno-economic assessment, and environmental evaluation.

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Section: Other Components For Renewable Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Advances in Technologies, Methods, and Economic Analysis for Sustainable Development of Energy, Water, and Environment Systems

et al. 2022

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“…Scroll expander application in the automobile industry has been tested (Fatigati et al, 2022). In this research, the scroll expander's feasibility as a dual intake port is analyzed.…”

Section: Literature Reviewmentioning

confidence: 99%

“…

additional advantages when it comes to replacing equipment in automobiles for smooth, frictionless operation (Fatigati et al, 2022). They can also work in both dry and wet conditions, which is useful in heat-generating applications.The operation of the scroll machine is very simple and makes its simplicity a major factor in many industries.

…”

mentioning

confidence: 99%

Numerical and Experimental Investigation of Nonlubricated Air Scroll Expander Derived From a Refrigerant Scroll Compressor

Konijeti¹,

Kottapalli²

2022

Front. Heat Mass Transf.

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additional advantages when it comes to replacing equipment in automobiles for smooth, frictionless operation (Fatigati et al., 2022). They can also work in both dry and wet conditions, which is useful in heat-generating applications.The operation of the scroll machine is very simple and makes its simplicity a major factor in many industries. The other factors like compactness and durability are the added advantages of the scroll machine. These factors make it a viable choice as an expander in various industries including small-scale ORC systems (Fatigatib, 2020). The scroll expander was divided into three major categories like hermetic scroll-type expanders, semi-hermetic scroll-type expanders, and open scroll-type expander drive expanders were studied in the literature study done by Fatigatib (Fatigatib, 2020) in the year 2020. A review by Fatigatib (Fatigatib, 2020) , studied a small-scale ORC-based test bench. The working fluid considered in the study is R134a for debuting a hermetic scroll expander. The scroll-type expander used in the study is derived from a compressor and used three poles asynchronous engine for integrating the hermetic scroll-type expander developed. Literature ReviewScroll expander application in the automobile industry has been tested (Fatigati et al., 2022). In this research, the scroll expander's feasibility as a dual intake port is analyzed. Similarly, research on a large number of micro-to small-scale organic Rankine cycle (ORC) applications are Frontiers in Heat and Mass Transfer

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“…The Dual Intake Port (DIP) is one of the most interesting technologies allowing introduction of significant benefits [24,25]. It consists of introducing an auxiliary secondary inlet port after the closure of the main one, able to refill a vane which has an increased volume with respect to that it had when the first port was closed.…”

Section: Introductionmentioning

confidence: 99%

Development of Dual Intake Port Technology in ORC-Based Power Unit Driven by Solar-Assisted Reservoir

Fatigati,

Cipollone

2024

Energies

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The ORC-based micro-cogeneration systems exploiting a solar source to generate electricity and domestic hot water (DHW) simultaneously are a promising solution to reduce CO2 emissions in the residential sector. In recent years, a huge amount of attention was focused on the development of a technological solution allowing improved performance of solar ORC-based systems frequently working under off-design conditions due to the intermittence of the solar source availability and to the variability in domestic hot water demand. The optimization efforts are focused on the improvement of component technology and plant architecture. The expander is retained as the key component of such micro-cogeneration units. Generally, volumetric machines are adopted thanks to their better capability to deal with severe off-design conditions. Among the volumetric expanders, scroll machines are one of the best candidates thanks to their reliability and to their flexibility in managing two-phase working fluid. Their good efficiency adds further interest to place them among the best candidate machines to be considered. Nevertheless, similarly to other volumetric expanders, an additional research effort is needed toward efficiency improvement. The fixed built-in volume ratio, in fact, could produce an unsteady under- or over-expansion during vane filling and emptying, mainly when the operating conditions depart from the designed ones. To overcome this phenomenon, a dual intake port (DIP) technology was also introduced for the scroll expander. Such technology allows widening the angular extension of the intake phase, thus adapting the ratio between the intake and exhaust volume (so called built-in volume ratio) to the operating condition. Moreover, DIP technology allows increasing the permeability of the machine, ensuring a resulting higher mass flow rate for a given pressure difference at the expander side. On the other hand, for a given mass flow rate, the expander intake pressure diminishes with a positive benefit on scroll efficiency. DIP benefits were already proven experimentally and theoretically in previous works by the authors for Sliding Rotary Vane Expanders (SVRE). In the present paper, the impact of the DIP technology was assessed in a solar-assisted ORC-based micro-cogeneration system operating with scroll expanders and being characterized by reduced power (hundreds of W). It was found that the DIP Scroll allows elaboration of a 32% higher mass flow rate for a given pressure difference between intake and expander sides for the application at hand. This leads to an average power increase of 10% and to an improvement of up to 5% of the expander mechanical efficiency. Such results are particularly interesting for micro-cogeneration ORC-based units that are solar-assisted. Indeed, the high variability of hot source and DHW demand makes the operation of the DIP expander at a wide range of operating conditions. The experimental activity conducted confirms the suitability of the DIP expander to exploit as much as possible the thermal power available from a hot source even when at variable temperatures during operation.

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Feasibility Assessment of a Dual Intake-Port Scroll Expander Operating in an ORC-Based Power Unit

Cited by 12 publications

References 34 publications

Recent Advances in Technologies, Methods, and Economic Analysis for Sustainable Development of Energy, Water, and Environment Systems

Recent Advances in Technologies, Methods, and Economic Analysis for Sustainable Development of Energy, Water, and Environment Systems

Numerical and Experimental Investigation of Nonlubricated Air Scroll Expander Derived From a Refrigerant Scroll Compressor

Development of Dual Intake Port Technology in ORC-Based Power Unit Driven by Solar-Assisted Reservoir

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