The Experts below are selected from a list of 1976208 Experts worldwide ranked by ideXlab platform
Santo Marcello Zimbone - One of the best experts on this subject based on the ideXlab platform.
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a simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems
Renewable Energy, 2016Co-Authors: Demetrio Antonio Zema, Angelo Nicotra, Vincenzo Tamburino, Santo Marcello ZimboneAbstract:A simple method is proposed to site turbines and choose their power output, evaluate costs and incomes and provide useful indications for Micro Hydro Power (MHP) plant design in existing irrigation systems. This method, based on simple models available in literature and requiring a reduced number of input parameters easy to survey in preliminary design stages, has been applied and verified in an existing irrigation system located in Calabria (Italy).
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a simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems
Renewable Energy, 2016Co-Authors: Demetrio Antonio Zema, Angelo Nicotra, Vincenzo Tamburino, Santo Marcello ZimboneAbstract:Abstract A simple method is proposed to site turbines and choose their power output, evaluate costs and incomes and provide useful indications for Micro Hydro Power (MHP) plant design in existing irrigation systems. This method, based on simple models available in literature and requiring a reduced number of input parameters easy to survey in preliminary design stages, has been applied and verified in an existing irrigation system located in Calabria (Italy). The results have highlighted that in the case study the smallest profitable turbine would produce 5 kW. A lower number of plants (with higher output) would produce no particular monetary savings compared to a greater number of smaller turbines. Furthermore, neither was the option of increasing pipeline diameter found to provide savings. In general, an appreciable potential from MHP operation has been shown in existing irrigation systems, providing a return on investment higher than that provided by the Italian financial market. Finally, MHP profitability noticeably increases with total annual operation time, being on average 55% higher in a wet year (eight months of electrical production/four month of irrigation) compared to a dry year (six months of electrical production/six months of irrigation).
Demetrio Antonio Zema - One of the best experts on this subject based on the ideXlab platform.
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a simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems
Renewable Energy, 2016Co-Authors: Demetrio Antonio Zema, Angelo Nicotra, Vincenzo Tamburino, Santo Marcello ZimboneAbstract:A simple method is proposed to site turbines and choose their power output, evaluate costs and incomes and provide useful indications for Micro Hydro Power (MHP) plant design in existing irrigation systems. This method, based on simple models available in literature and requiring a reduced number of input parameters easy to survey in preliminary design stages, has been applied and verified in an existing irrigation system located in Calabria (Italy).
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a simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems
Renewable Energy, 2016Co-Authors: Demetrio Antonio Zema, Angelo Nicotra, Vincenzo Tamburino, Santo Marcello ZimboneAbstract:Abstract A simple method is proposed to site turbines and choose their power output, evaluate costs and incomes and provide useful indications for Micro Hydro Power (MHP) plant design in existing irrigation systems. This method, based on simple models available in literature and requiring a reduced number of input parameters easy to survey in preliminary design stages, has been applied and verified in an existing irrigation system located in Calabria (Italy). The results have highlighted that in the case study the smallest profitable turbine would produce 5 kW. A lower number of plants (with higher output) would produce no particular monetary savings compared to a greater number of smaller turbines. Furthermore, neither was the option of increasing pipeline diameter found to provide savings. In general, an appreciable potential from MHP operation has been shown in existing irrigation systems, providing a return on investment higher than that provided by the Italian financial market. Finally, MHP profitability noticeably increases with total annual operation time, being on average 55% higher in a wet year (eight months of electrical production/four month of irrigation) compared to a dry year (six months of electrical production/six months of irrigation).
Angelo Nicotra - One of the best experts on this subject based on the ideXlab platform.
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a simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems
Renewable Energy, 2016Co-Authors: Demetrio Antonio Zema, Angelo Nicotra, Vincenzo Tamburino, Santo Marcello ZimboneAbstract:A simple method is proposed to site turbines and choose their power output, evaluate costs and incomes and provide useful indications for Micro Hydro Power (MHP) plant design in existing irrigation systems. This method, based on simple models available in literature and requiring a reduced number of input parameters easy to survey in preliminary design stages, has been applied and verified in an existing irrigation system located in Calabria (Italy).
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a simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems
Renewable Energy, 2016Co-Authors: Demetrio Antonio Zema, Angelo Nicotra, Vincenzo Tamburino, Santo Marcello ZimboneAbstract:Abstract A simple method is proposed to site turbines and choose their power output, evaluate costs and incomes and provide useful indications for Micro Hydro Power (MHP) plant design in existing irrigation systems. This method, based on simple models available in literature and requiring a reduced number of input parameters easy to survey in preliminary design stages, has been applied and verified in an existing irrigation system located in Calabria (Italy). The results have highlighted that in the case study the smallest profitable turbine would produce 5 kW. A lower number of plants (with higher output) would produce no particular monetary savings compared to a greater number of smaller turbines. Furthermore, neither was the option of increasing pipeline diameter found to provide savings. In general, an appreciable potential from MHP operation has been shown in existing irrigation systems, providing a return on investment higher than that provided by the Italian financial market. Finally, MHP profitability noticeably increases with total annual operation time, being on average 55% higher in a wet year (eight months of electrical production/four month of irrigation) compared to a dry year (six months of electrical production/six months of irrigation).
Vincenzo Tamburino - One of the best experts on this subject based on the ideXlab platform.
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a simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems
Renewable Energy, 2016Co-Authors: Demetrio Antonio Zema, Angelo Nicotra, Vincenzo Tamburino, Santo Marcello ZimboneAbstract:A simple method is proposed to site turbines and choose their power output, evaluate costs and incomes and provide useful indications for Micro Hydro Power (MHP) plant design in existing irrigation systems. This method, based on simple models available in literature and requiring a reduced number of input parameters easy to survey in preliminary design stages, has been applied and verified in an existing irrigation system located in Calabria (Italy).
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a simple method to evaluate the technical and economic feasibility of micro hydro power plants in existing irrigation systems
Renewable Energy, 2016Co-Authors: Demetrio Antonio Zema, Angelo Nicotra, Vincenzo Tamburino, Santo Marcello ZimboneAbstract:Abstract A simple method is proposed to site turbines and choose their power output, evaluate costs and incomes and provide useful indications for Micro Hydro Power (MHP) plant design in existing irrigation systems. This method, based on simple models available in literature and requiring a reduced number of input parameters easy to survey in preliminary design stages, has been applied and verified in an existing irrigation system located in Calabria (Italy). The results have highlighted that in the case study the smallest profitable turbine would produce 5 kW. A lower number of plants (with higher output) would produce no particular monetary savings compared to a greater number of smaller turbines. Furthermore, neither was the option of increasing pipeline diameter found to provide savings. In general, an appreciable potential from MHP operation has been shown in existing irrigation systems, providing a return on investment higher than that provided by the Italian financial market. Finally, MHP profitability noticeably increases with total annual operation time, being on average 55% higher in a wet year (eight months of electrical production/four month of irrigation) compared to a dry year (six months of electrical production/six months of irrigation).
Hongyong Sun - One of the best experts on this subject based on the ideXlab platform.
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assessing the performance of different irrigation systems on winter wheat under limited water supply
Agricultural Water Management, 2018Co-Authors: Qin Fang, Xiying Zhang, Liwei Shao, Suying Chen, Hongyong SunAbstract:The rapid decline of groundwater table is threatening sustainable irrigation agricultural development in the North China Plain (NCP). Optimized irrigation scheduling and water-saving irrigation technologies need to be developed to reduce irrigation water use and maintain the grain production potential for the region. This study was conducted at Luancheng experimental station in the NCP during 2012–2015 to evaluate the effects of different irrigation methods (basin irrigation, BI; tube-sprinkler irrigation, SI; pillow irrigation, PI and drip irrigation, DI) with various irrigation amount/frequency on yield, economic returns and water use efficiency (WUE) of winter wheat. Under the same limited irrigation amount (90mm/season), two irrigation applications (45mm/application) conducted using DI significantly increased the yield and WUE as compared with the BI using one single application. Increasing the seasonal irrigation amount to 160mm, the increase in the application frequency by reducing the irrigation amount per application didn’t significantly affect the yield using either PI or SI. Results showed that soil water depletion (SWD) contributed 40–60% of the seasonal evapotranspiration (ET) under limited water supply. The smaller root length density (RLD) in deep layers of the soil restricted the soil water uptake by the crop. Therefore, increasing irrigation frequency would maintain the top soil layers with higher soil water contents where RLD was greater that improved crop water use and yield under limited water supply. However, when irrigation water was plentiful, Micro-Irrigation methods did not increase yields. Due to the high cost in installation of the three Micro-Irrigation systems, their net income was reduced by 30% as compared with the BI method. The economic water productivity ratio (EWPR) was only 3–4 for the three Micro-Irrigation systems, much less than the basin irrigation method, which had an average value of 16. Currently, the basin irrigation method is more economic for growing winter wheat in the NCP.
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evapotranspiration and its partitioning in an irrigated winter wheat field a combined isotopic and micrometeorologic approach
Journal of Hydrology, 2011Co-Authors: Yucui Zhang, Hongyong Sun, Yanjun Shen, John B GatesAbstract:summary Groundwater overdraft threatens the future of irrigated agriculture in the North China Plain. Because irrigated winter wheat is the dominant user of extracted groundwater, improved understanding of water cycling through the soil–plant–atmosphere continuum during wheat cultivation in the North China Plain is necessary for improving the sustainable utilization of limited water resources and promoting food security. In this paper, a combination of micrometeorological and stable isotope techniques was used to investigate evapotranspiration and soil water dynamics in a typical winter wheat agro-ecosystem (Luancheng Agro-ecosystem Experiment Station, Hebei Province). Stable isotope mixing models were used with eddy covariance evapotranspiration estimates and micro-lysimeter evaporation measurements to partition evapotranspiration and determine temporal variability of root water uptake depths. Results suggest that evaporation during the winter wheat irrigation season can reach up to 30% of the total water consumption (almost two typical irrigations). The main depths of root water uptake were 0–40 cm. Therefore, it is suggested that the planned irrigation wetting depth can be reduced at least to 40 cm, rather than the traditional 100 cm, as a means of water conservation. Widespread implementation of these practices could amount to a significant water savings for the North China Plain.