Search Results - "Costa, V.A.F."

Mass, energy and exergy analysis of a biomass boiler: A portuguese representative case of the pulp and paper industry by Costa, V.A.F., Tarelho, L.A.C., Sobrinho, A.

“…•A case study representative of the energy production from eucalyptus residual biomass in the Portuguese pulp and paper industry.•Mass, energy and exergy flows…”
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Liquid leakage assessment from gas leakage tests by Costa, V.A.F.

“…•Developments relating liquid and gas leakage flows based on physical principles.•Analytical relationships involving explicitly all the governing…”
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Influence of the design parameters on the overall performance of a solar adsorption refrigerator by Brites, G.J.V.N., Costa, J.J., Costa, V.A.F.

“…This paper describes a parametric improvement study of a solar adsorption refrigerator, using a flat plate collector with silica-gel and water as the…”
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A thermal energy storage system provided with an adsorption module – Dynamic modeling and viability study by Fernandes, M.S., Brites, G.J.V.N., Costa, J.J., Gaspar, A.R., Costa, V.A.F.

“…•A dynamic model of a heat storage system with an adsorption module is proposed.•System designed to increase the storage efficiency of hot water storage…”
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Optimization of a thermal energy storage system provided with an adsorption module – A GenOpt application in a TRNSYS/MATLAB model by Fernandes, M.S., Gaspar, A.R., Costa, V.A.F., Costa, J.J., Brites, G.J.V.N.

“…•Optimization study of a heat storage system with an adsorption module is presented.•GenOpt optimization tool is applied to a TRNSYS/MATLAB model.•Assessment…”
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Emissions mitigation by control of biomass feeding in an industrial biomass boiler by Valente, L, Tarelho, L. A. C, Costa, V. A. F

“…The objective of this work is the experimental investigation and characterization of the influence of biomass feeding on combustion efficiency of an industrial…”
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Heatline and massline visualization of laminar natural convection boundary layers near a vertical wall by Costa, V.A.F.

“…The development of the similarity version of the heatfunctions for the laminar natural convection near a vertical wall, isothermal or under constant heat flux,…”
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Double diffusive natural convection in a square enclosure with heat and mass diffusive walls by Costa, V.A.F.

“…Double diffusive steady natural convection in a vertical stack of square enclosures, with heat and mass diffusive walls, is studied numerically. The main…”
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On the rate of evaporation of water into a stream of dry air, humidified air and superheated steam, and the inversion temperature by Costa, V.A.F., Neto da Silva, F.

“…The concept of inversion temperature was developed in order to assess the effectiveness of superheated steam as a drying agent when compared with dry or humid…”
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On the exergy balance equation and the exergy destruction by Costa, V.A.F.

“…The exergy balance equation can be written expressing the useful work for a general process as depending on the useful work for the corresponding reversible…”
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Modeling and parametric optimization of a liquid piston compressor with inner cooling tubes by Cerkovnik, N., Costa, V.A.F., Lopes, A.M.G.

“…•Liquid piston compressors allow more isothermal, and more efficient, compression.•Optimization of liquid piston compressor can be reliably done using a 0D…”
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ENERGY-EXERGY diagrams for states and energy and exergy balance equations representation by Costa, V.A.F.

“…This work proposes energy-exergy diagrams that clarify the relationships between energy and exergy, relevant for both the exergy teaching/learning process and…”
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In-plane thermal anisotropy of natural cork and its variability by Santos, T., Amaral, J.S., Amaral, V.S., Costa, V.A.F.

“…[Display omitted] •First-time appraisal of thermal diffusivity of cork along its main growth directions.•In-plane thermography and thermal ellipsometry…”
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A time scale-based analysis of the laminar convective phenomena by Costa, V.A.F.

“…Convective transport phenomena are usually analyzed starting from the mass, momentum and thermal energy differential conservation equations. These equations…”
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Steady mixed convection in a differentially heated square enclosure with an active rotating circular cylinder by Costa, V.A.F., Raimundo, A.M.

“…Mixed convection in a square enclosure with a rotating cylinder centered within it is numerically studied. Depending on the rotation of the cylinder, the…”
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Review and future trends of solar adsorption refrigeration systems by Fernandes, M.S., Brites, G.J.V.N., Costa, J.J., Gaspar, A.R., Costa, V.A.F.

“…This paper aims to provide the current state of the art of solar adsorption refrigeration systems operating with the single-bed intermittent cycle (also known…”
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Microwave versus conventional porcelain firing: Colour analysis by Santos, T., Hennetier, L., Costa, V.A.F., Costa, L.C.

“…Colour of microwave fired porcelain in a home-built multimode furnace is compared with electrically and gas (industrial) fired samples. Coffee cups were fired…”
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Partial replacement of EPDM by GTR in thermoplastic elastomers based on PP/EPDM: Effects on morphology and mechanical properties by Lima, Paulo, Oliveira, José, Costa, Vitor

“…ABSTRACT The formulation of recycled thermoplastic elastomeric materials (TPE) based on ground tyre rubber (GTR), generated from end of life tyres, can be an…”
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Natural convection in partially divided square enclosures: Effects of thermal boundary conditions and thermal conductivity of the partitions by Costa, V.A.F.

“…Natural convection in partitioned square enclosures filled with air is numerically studied, trying to characterize these enclosures mainly in what concerns its…”
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Global insight into microwave stoneware firing: Crystallochemical transformations by Santos, T., Gomes, C.S.F., Santos, N.F., Costa, V.A.F., Costa, L.C.

“…Microwave heating technology is presented as an alternative to conventional stoneware firing, with focus on the crystallochemical transformations. Scanning…”
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