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M A Moreno - One of the best experts on this subject based on the ideXlab platform.

  • design of sprinkler irrigation subunit of minimum cost with Proper Operation application at corn crop in spain
    Water Resources Management, 2014
    Co-Authors: F Carrion, J M Tarjuelo, J Montero, M A Moreno
    Abstract:

    MATLAB™ software named PRESUD (Pressurized Subunit Design) was developed to identify the optimum solid set sprinkler irrigation subunit design with a criterion of minimizing the annual water application cost (CT). This CT is defined as the cost per cubic meter of water applied to the soil for crop use. In this study, only rectangular subunits are considered, using an iterative method for calculating the lateral and manifold pipelines. The results indicate that water cost (Cw), which includes the investment and Operation costs for pumping water from the source to the subunit inlet, makes up 75 % of CT. Another important factor is energy cost, which comprises 14 % of CT. The remaining variables, such as sprinkler spacing and layout, or application rate (ARa), have a lower impact on CT. In cases of use groundwater, the proportion of energy cost in CW can reach 40 %; thus, energy is an important part of CT. Results shows that the criterion of limiting the maximum difference in pressure heads in the irrigation subunit (Δh < 20 %), widely used when designing a sprinkler irrigation subunit, does not always lead to a minimum CT, and the use of tools such as PRESUD can help obtain better solutions.

  • design of microirrigation subunit of minimum cost with Proper Operation
    Irrigation Science, 2013
    Co-Authors: F Carrion, J M Tarjuelo, D Hernandez, M A Moreno
    Abstract:

    Matlab software named PRESUD (Pressurized Subunit Design) was developed to identify the optimum microirrigation subunit design using the annual water application cost per unit of irrigated area (C T). This is defined as the cost per cubic meter of water applied to the soil for crop use, calculated as the sum of investment, maintenance, energy, and water (C w) costs. In this study, only rectangular subunits are considered, using an iterative method for calculating the lateral and manifold pipelines. The infrastructure necessary for water delivery to the subunit inlet was taken into account in the price of water. The results indicate that C w is the most important factor in C T, which includes the investment and energy costs for moving water from the source to the subunit inlet. Other important factors, in order of importance, are the emission exponent (x), coefficient of variation of emitter manufacturer (CVqmf), and emitter spacing (s e). The minimum water application cost for a typical subunit to irrigate vegetable crops such as pepper is obtained with a subunit of 0.3–0.5 ha, with 80 m of paired lateral pipe length of 16 (13.6 mm) PE 0.25 MPa diameter, and 50 (44 mm) PE 0.4 MPa of manifold pipe diameter. The cost of a typical drip irrigation subunit design for a crop, such as grapevines on trellises, is equivalent to 25 % of the C T of a typical subunit to irrigate vegetable crops, such as pepper.

Fernando D. Bianchi - One of the best experts on this subject based on the ideXlab platform.

  • Control of a supercapacitor energy storage system for microgrid applications
    IEEE Transactions on Energy Conversion, 2013
    Co-Authors: Fernando A. Inthamoussou, Jordi Pegueroles-queralt, Fernando D. Bianchi
    Abstract:

    The Proper Operation of a microgrid requires storage devices that increase the inertia and avoid instability of the system. This paper presents the control of an energy storage system (ESS) based on supercapacitor in the context of grid-connected microgrids. The ESS is composed of AC/DC and DC/DC converters tied by a dc link. A single sliding mode strategy is proposed to control a bidirectional dc/dc converter, capable of working Properly under all operating conditions. The switching devices are commanded by a single sliding function, dynamically shaped by references sent from the microgrid central controller. This feature facilitates the implementation and design of the control law and simplifies the stability analysis over the entire operating range. The effectiveness of the proposed control strategy is illustrated by experimental results.

J Prat - One of the best experts on this subject based on the ideXlab platform.

F Carrion - One of the best experts on this subject based on the ideXlab platform.

  • design of sprinkler irrigation subunit of minimum cost with Proper Operation application at corn crop in spain
    Water Resources Management, 2014
    Co-Authors: F Carrion, J M Tarjuelo, J Montero, M A Moreno
    Abstract:

    MATLAB™ software named PRESUD (Pressurized Subunit Design) was developed to identify the optimum solid set sprinkler irrigation subunit design with a criterion of minimizing the annual water application cost (CT). This CT is defined as the cost per cubic meter of water applied to the soil for crop use. In this study, only rectangular subunits are considered, using an iterative method for calculating the lateral and manifold pipelines. The results indicate that water cost (Cw), which includes the investment and Operation costs for pumping water from the source to the subunit inlet, makes up 75 % of CT. Another important factor is energy cost, which comprises 14 % of CT. The remaining variables, such as sprinkler spacing and layout, or application rate (ARa), have a lower impact on CT. In cases of use groundwater, the proportion of energy cost in CW can reach 40 %; thus, energy is an important part of CT. Results shows that the criterion of limiting the maximum difference in pressure heads in the irrigation subunit (Δh < 20 %), widely used when designing a sprinkler irrigation subunit, does not always lead to a minimum CT, and the use of tools such as PRESUD can help obtain better solutions.

  • design of microirrigation subunit of minimum cost with Proper Operation
    Irrigation Science, 2013
    Co-Authors: F Carrion, J M Tarjuelo, D Hernandez, M A Moreno
    Abstract:

    Matlab software named PRESUD (Pressurized Subunit Design) was developed to identify the optimum microirrigation subunit design using the annual water application cost per unit of irrigated area (C T). This is defined as the cost per cubic meter of water applied to the soil for crop use, calculated as the sum of investment, maintenance, energy, and water (C w) costs. In this study, only rectangular subunits are considered, using an iterative method for calculating the lateral and manifold pipelines. The infrastructure necessary for water delivery to the subunit inlet was taken into account in the price of water. The results indicate that C w is the most important factor in C T, which includes the investment and energy costs for moving water from the source to the subunit inlet. Other important factors, in order of importance, are the emission exponent (x), coefficient of variation of emitter manufacturer (CVqmf), and emitter spacing (s e). The minimum water application cost for a typical subunit to irrigate vegetable crops such as pepper is obtained with a subunit of 0.3–0.5 ha, with 80 m of paired lateral pipe length of 16 (13.6 mm) PE 0.25 MPa diameter, and 50 (44 mm) PE 0.4 MPa of manifold pipe diameter. The cost of a typical drip irrigation subunit design for a crop, such as grapevines on trellises, is equivalent to 25 % of the C T of a typical subunit to irrigate vegetable crops, such as pepper.

Juan Jose Vegas Olmos - One of the best experts on this subject based on the ideXlab platform.

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