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首页> 外文期刊>Journal of Cleaner Production >Dynamic mathematical model design of photovoltaic water pumping systems for horticultural crops irrigation: A guide to electrical energy potential assessment for increase access to electrical energy
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Dynamic mathematical model design of photovoltaic water pumping systems for horticultural crops irrigation: A guide to electrical energy potential assessment for increase access to electrical energy

机译：园艺作物灌溉用光伏水泵系统的动态数学模型设计：电能潜力评估指南，以增加获取电能的机会

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摘要

In developing countries where most population does not have access to the conventional electricity network and depends on agriculture for their subsistence, the agricultural sector has been negatively affected by the low coverage of the national energy network in areas with potential for irrigation. The low index of the population with access to electricity leads to the development of affordable and clean energy for agricultural and domestic uses. Photovoltaic water pumping systems for irrigation (PVWPSI) have been widely used to increase access to energy for irrigation in many countries and several models' design are being developed to improve their performance and deployment. However, during the PVWPSI design, many of the existing models' somehow fail by considering the water demand as constant throughout crops productive cycle. In this paper, a new dynamic mathematical model design of PVWPSI is presented as a guide tool to electrical energy potential assessment for irrigation and supply other energy demands through the horticultural crops water demand characteristic in its different development phases. In this context, a PVWPSI design is made, using as a case study a typical 0.5ha for tomato production in Boane district, Mozambique. The results show that, generally horticultural crops have four development phases. Yet, PVWPSI should be sized according to the crop development phase, whose water demand is maximum. The tomato sizing phase is the flowering, and the daily averages surplus electrical energy in the system in the four tomato development phases, after irrigation, are 5.02 kWh, 2.87 kWh, 1.02 kWh, and 2.55 kWh, that can be saved and redirected to cover other electrical energy needs. (c) 2019 Elsevier Ltd. All rights reserved.
机译：在大多数人口无法获得常规电力网络并依靠农业维持生计的发展中国家，农业部门受到国家能源网络在潜在灌溉地区覆盖率低的不利影响。能够使用电力的人口指数较低，导致了可负担得起的清洁能源用于农业和家庭用途的发展。光伏灌溉用水泵系统（PVWPSI）在许多国家被广泛用于增加灌溉能源，并且正在开发几种模型以提高其性能和部署。但是，在PVWPSI设计过程中，许多现有模型由于考虑到整个作物生产周期中的需水量恒定而以某种方式失败了。在本文中，提出了一种新的PVWPSI动态数学模型设计，作为通过园艺作物在不同发展阶段的需水特征来灌溉和供应其他能源需求的电能潜力评估的指导工具。在这种情况下，以莫桑比克博恩地区典型的0.5公顷番茄生产案例为例，进行了PVWPSI设计。结果表明，通常园艺作物具有四个发展阶段。但是，PVWPSI应该根据作物的最大需求量来确定。番茄上浆期是开花期，灌溉后的四个番茄发育期中系统的日平均剩余电能分别为5.02 kWh，2.87 kWh，1.02 kWh和2.55 kWh，可以保存并重新定向以覆盖其他电能需求。 （c）2019爱思唯尔有限公司。保留所有权利。

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