Energy evaluation at a winery: a case study at a Portuguese producer

Correia, João Carlos Pimenta Freire Martins; Mourão, António; Cavique, Miguel

doi:10.1051/matecconf/201711210001

Cited by 5 publications

(4 citation statements)

References 8 publications

(9 reference statements)

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“…To achieve this, the fluid is seeded with neutrally buoyant glass-hallow spheres (9-13 mm; 1.1 g cm À3 ) which generate sufficient light scattering and excellent traceability of the flow. The flow analysis in Figure 2 displays a behavior correlated to the sign of the low thermal gradient imposed [7,11,12]. A positive thermal gradient induces upward vertical motion of the fluid along the receptacle wall.…”

Section: Flow Dynamics and Resuspension Of Light Leesmentioning

confidence: 99%

Passive wine macromixing from 3D natural convection for different winery tank shapes: application to lees resuspension

Bogard

Beaumont

Murer

et al. 2020

Mechanics & Industry

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The works presented in this paper aim at investigating the problems related to the clarification of wines when random passive resuspension of lees occurs. More precisely, resuspension is addressed when temperature variations occur between the wine stored in tanks and the external surroundings of the tanks. From in situ laboratory studies involving laser tomography techniques, it is shown that low temperature gradients between a wine containing light lees and its external environment induce mass transfer by natural convection, generating enough fluid energy to resuspend the light lees in the liquid phase. The experiments are then complemented by numerical, CFD-based simulations focused on the role played by the geometry of different commercial tanks in the intensity of internal mixing. Finally, the groundwork for a study on a new internal design of the tanks by helical grooving is presented. To the best of the authors' knowledge, no literature study mentions the influence of thermal gradients on the resuspension of light lees and the influence of winery tank shapes on the internal fluid mixing intensity.

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Section: Flow Dynamics and Resuspension Of Light Leesmentioning

confidence: 99%

Passive wine macromixing from 3D natural convection for different winery tank shapes: application to lees resuspension

Bogard

Beaumont

Murer

et al. 2020

Mechanics & Industry

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“…The flow analysis within the wine bulk resulting from the low thermal gradients between the wine and the external environment is displayed in Figure 1 . As shown in Figure 1 , the flow dynamics showed radically different overall behavior depending on the thermal gradient direction [ 15 , 16 , 17 ]. A positive thermal gradient drove overall upward vertical movement of the wine along the receptacle wall.…”

Section: Experimental Procedure: Highlighting the Thermal Resuspenmentioning

confidence: 99%

Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension

Bogard

Beaumont

Simescu-Lazar

et al. 2020

Foods

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In winemaking, clarification and stabilization are the processes by which insoluble matter suspended in the wine (called lees) is removed before bottling. The light lees represent 2–4% of the total wine volume. Under certain circumstances, resuspension of lees may occur. The resuspension of lees has been attributed to temperature variations between the wine stored in tanks and the environment of the cellar. From in situ, laboratory-scale studies involving laser tomography techniques, it was shown that low (positive or negative) thermal gradients between a wine tank containing light lees and its external environment induce mass transfer by natural convection. To extrapolate these findings to full-scale tanks, an Eulerian-Eulerian multiphase CFD model was applied to simulate the two-phase flow behavior as a function of temperature variations on a 24–h cycle. Numerical temperature and time-dependent flow patterns of both wine and lees confirm that low thermal gradients induce sufficient fluid energy to resuspend the lees, thus showing that the laboratory results can be extrapolated to full-scale tanks.

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“…High temperatures can lead to the rapid aging of wine, reducing its quality and increasing wine losses. In these types of warehouses, natural lighting can play a key role due to its low thermal inertia and its influence on the variance in temperature and humidity [25].…”

Section: Introductionmentioning

confidence: 99%

Construction Solutions, Cost and Thermal Behavior of Efficiently Designed Above-Ground Wine-Aging Facilities

Gómez-Villarino,

Barbero-Barrera,

Cañas

et al. 2024

Buildings

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The wine industry requires a considerable amount of energy, with an important fraction corresponding to the cooling and ventilation of above-ground aging warehouses. The large investments made in aging facilities can compromise the viability and competitiveness of wineries if their design is not optimized. The objective of this study was to provide guidance for the efficient design of new above-ground warehouses. To this end, multiple construction solutions (structure, envelopes, levels of integration, etc.) were characterized, and their costs and the resulting interior environments were analyzed. The results offer a comprehensive view of potential construction solutions and benchmark price ranges for viable and profitable designs. With a total cost of 300 EUR/m2, an average damping of 98% per day can be achieved. Increasing the costs does not imply better effectiveness. A double enclosure with internal insulation—with or without an air chamber—can achieve excellent results. Greater integration as a result of several enclosures being in contact with other rooms and/or the terrain allows for a high effectiveness to be achieved without air conditioning. Perimeter glazing and ventilation holes can reduce the effectiveness of the construction, resulting in greater instability and a lower damping capacity.

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Energy evaluation at a winery: a case study at a Portuguese producer

Cited by 5 publications

References 8 publications

Passive wine macromixing from 3D natural convection for different winery tank shapes: application to lees resuspension

Passive wine macromixing from 3D natural convection for different winery tank shapes: application to lees resuspension

Combined Experimental and CFD Approach of Two-Phase Flow Driven by Low Thermal Gradients in Wine Tanks: Application to Light Lees Resuspension

Construction Solutions, Cost and Thermal Behavior of Efficiently Designed Above-Ground Wine-Aging Facilities

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