Experimental Investigation and CFD Analysis of Heat Transfer in Single Phase Subcooler of a Small Scale Waste Heat Recovery ORC

Roumpedakis, Tryfon C.; Chapaloglou, Spiros; Pallis, Platon; Leontaritis, Aris-Dimitrios; Braimakis, Konstantinos; Karellas, Sotiriοs; Vourliotis, Panagiotis

doi:10.1016/j.egypro.2017.09.166

Cited by 11 publications

(6 citation statements)

References 27 publications

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“…V HTF = V st + 0.12A col + 0.05 (31) The factor 0.12 is a typical value provided by a manufacturer, while the added constant of 0.05 is an approximation for the intermediate pipelines between the solar field, the storage tank and the ORC evaporator. The quantity of working fluid used in the ORC is calculated based on its capacity and the size of heat exchangers, as well as the requirement of an 80 lt receiver tank, in accordance with experience from similar experimental systems [81][82][83]. Overall, the total amount of working fluid is taken equal to 1.5 times the total capacity of the receiver tank (120 lt).…”

Section: Cost Estimationmentioning

confidence: 99%

Techno-Economic Optimization of Medium Temperature Solar-Driven Subcritical Organic Rankine Cycle

Roumpedakis

Fostieris

Braimakis

et al. 2021

Thermo

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The present work focuses on the techno-economic assessment and multi-objective genetic algorithm optimization of small-scale (40 kWth input), solar Organic Rankine Cycle (ORC) systems driven by medium-to-high temperature (up to 210 °C) parabolic dish (PDC) and trough (PTC) collectors. The ORCs are designed to maximize their nominal thermal efficiency for several natural hydrocarbon working fluids. The optimization variables are the solar field area and storage tank capacity, with the goal of minimizing the levelized cost of produced electricity (LCoE) and maximizing the annual solar conversion efficiency. The lowest LCOE (0.34 €/kWh) was obtained in Athens for a high solar field area and low storage tank capacity. Meanwhile, the maximum annual solar conversion efficiencies (10.5–11%) were obtained in northern cities (e.g., Brussels) at lower solar field locations. While PTCs and PDCs result in similar efficiencies, the use of PTCs is more cost-effective. Among the working fluids, Cyclopentane and Cyclohexane exhibited the best performance, owing to their high critical temperatures. Notably, the systems could be more profitable at higher system sizes, as indicated by the 6% LCoE decrease of the solar ORC in Athens when the nominal heat input was increased to 80 kWth.

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Section: Cost Estimationmentioning

confidence: 99%

Techno-Economic Optimization of Medium Temperature Solar-Driven Subcritical Organic Rankine Cycle

Roumpedakis

Fostieris

Braimakis

et al. 2021

Thermo

Self Cite

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“…The results show that a higher heat transfer coefficient can be achieved in the R245fa system, because of its high density and pressure. Roumpedakis et al displays the ORC system using R134a. The system can be driven by 82°C of waste heat and produce 3.7 kW net electrical power.…”

Section: Introductionmentioning

confidence: 99%

Experimental and simulation analysis of low temperature heat sources driven adsorption air conditioning, refrigeration, integrating ammonia, and organic expanding power generation

Wang

2018

Int J Energy Res

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Summary Adsorption cooling technology is an effective method to use low‐temperature heat sources, such as solar energy, waste heat from industry, etc. However, there exists one bottleneck in the adsorption system application, because of its low energy usage efficiency. In this paper, one novel integrated cycle is designed, investigated, and tested. It includes adsorption cooling cycle, ammonia expanding power generation, and organic Rankine cycle. By the performance comparison of 16 different organics, R600 is the most suitable choice for organic Rankine cycle in this system, due to its highest potential exergy and proper working pressure. The system total exergy efficiency can be improved significantly by the two parts of power generation. The results show that when the heating source, cooling water temperature, and evaporation temperature are approximately 120.1°C, 29.6°C, and −5.3°C, the specific cooling power, coefficient of performance, and total exergy efficiency can arrive at 351.4 W/kg, 0.17, and 0.34, respectively.

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“…All experimental data derived from the second test campaign were used in parallel research activities [45], [47], [61] & [62]. The main goal was to establish models of critical components.…”

Section: Conclusion From the Second Experimental Campaign Resultsmentioning

confidence: 99%

“…A Renewable Energy Source could be coupled to the ORC system, such as a geothermal or solar collector field source. The parallel arrangement of two identical expanders provides the ability to the system to operate independently each scroll expander at nominal design conditions with the half heat flux (35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45). The coupling of the ORC system with a solar collector field will provided valuable information, in order to access the operating profile of the ORC system / solar collector field arrangement.…”

Section: No Further Actions Plannedmentioning

confidence: 99%

Experimental investigation and economic assessment of a fully automated organic Rankine cycle for waste heat recovery from marine engine jacket cooling water

Pallis¹,

Πάλλης²

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Η διδακτορική διατριβή επικεντρώθηκε στην αξιοποίηση της απορριπτόμενης θερμότητας κινητήρων εσωτερικής καύσης και πιο συγκεκριμένα από το κύκλωμα νερού ψύξης του χιτωνίου. Στα πλαίσια της πραγματοποιήθηκε η κατασκευή, η πειραματική αξιολόγηση, διερεύνηση και η πλήρη αυτοματοποίηση ενός συστήματος αξιοποίησης απορριπτόμενης θερμότητας για παραγωγή ηλεκτρικής ενέργειας με τη χρήση οργανικού κύκλου Rankine, ειδικά σχεδιασμένο για το κύκλωμα ψύξης του χιτωνίου ενός ναυτικού πετρελαιοκινητήρα.

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Experimental Investigation and CFD Analysis of Heat Transfer in Single Phase Subcooler of a Small Scale Waste Heat Recovery ORC

Cited by 11 publications

References 27 publications

Techno-Economic Optimization of Medium Temperature Solar-Driven Subcritical Organic Rankine Cycle

Techno-Economic Optimization of Medium Temperature Solar-Driven Subcritical Organic Rankine Cycle

Experimental and simulation analysis of low temperature heat sources driven adsorption air conditioning, refrigeration, integrating ammonia, and organic expanding power generation

Experimental investigation and economic assessment of a fully automated organic Rankine cycle for waste heat recovery from marine engine jacket cooling water

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