The power efficiency of the Tajo-Segura transfer and desalination

Melgarejo, Joaquín; Montaño, Borja

doi:10.2166/wst.2011.254

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…The energy cost is of particular importance, as it is not only a financial cost but also an environmental cost in terms of greenhouse gas emissions, as the main source of energy used is fossil fuels. In this aspect, the transfer of water is associated with an energy cost, but this is significantly lower than that of desalination [58] and, although it is higher than that of water reuse, this is a resource with limited capacity to increase the available resources [57]. In addition, both non-conventional sources would imply a higher economic cost of water supply [28].…”

Section: Discussionmentioning

confidence: 99%

The Tariff Structure in the Tagus-Segura Water Transfer

García‐López

Montaño

Melgarejo

2022

Water

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The Tagus-Segura water transfer has generated significant value in the region that receives its water resources. Despite this value, some agents seek the cancellation of this important infrastructure, arguing economic, environmental, social, and political problems. With the aim of providing information on the efficiency of the Tagus-Segura aqueduct as a water resource management measure, especially in terms of the importance of water and the tariffs paid by the users of the aqueduct, this paper presents valuable information to analyse how to improve the functioning of the infrastructure. Thus, the southeast of Spain obtains a high return on the water received from the water transfer while covering all the financial costs derived from it. However, in 2017 a modification was introduced in the tariff that forced water users to cover the construction and fixed costs of the infrastructure as if the total amount of water agreed upon had been received, when in reality a lower amount had been received. This problem was not solved by the proposed tariffs for 2021, and it is therefore essential for the efficient operation of water transfer to modify these tariffs so that they are fair and reduce existing problems, thus avoiding the cancellation of an infrastructure that has not yet been amortised and which provides many benefits to the receiving region.

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Section: Discussionmentioning

confidence: 99%

The Tariff Structure in the Tagus-Segura Water Transfer

García‐López

Montaño

Melgarejo

2022

Water

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“…Por tanto, la problemática energética es fundamental a la hora de determinar la viabilidad de un instrumento capaz de incrementar los recursos hídricos disponibles. Este aspecto puede incidir de manera significativa en el momento de tomar la decisión de qué instrumento utilizar para afrontar la escasez [21]. En cualquier caso, no debe olvidarse que el coste financiero del consumo energético va directamente vinculado a la evolución de los precios de la energía.…”

Section: Consumo Energético De La Desalinización De Aguasunclassified

“…Para aportar información concreta, la Tabla 3 [21] presenta el consumo energético por tramos del trasvase Tajo-Segura. Se pueden encontrar grandes variaciones en función de dónde se produzca el consumo de agua a consecuencia de aspectos como la elevación o la distancia.…”

Section: Consumo Energético De Los Trasvases De Aguaunclassified

“…Todas estas actividades presentan un coste energético que condiciona en gran medida el desarrollo de las actividades. Los trasvases, debido a la necesidad de transportar el agua a una distancia considerable, con cambios de altitud, requieren de energía para poder funcionar [21]. La depuración de aguas residuales y la desalación de aguas, también presentan un coste energético significativo debido a los tratamientos que deben aplicarse [22,23].…”

Section: Introductionunclassified

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La viabilidad del autoconsumo energético por medio de placas solares en los servicios del agua en España

García¹,

Montaño²,

Molgarejo³

2022

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El consumo energético es uno de los principales componentes del gasto financiero en la provisión de los servicios del agua. Este deriva, en gran medida, del suministro tradicional a través de la compra de energía a las empresas suministradoras, lo que lleva asociada una determinada contaminación. Esto justifica una persecución constante del desarrollo de fuentes alternativas de energía con un menor impacto ambiental y, si es posible, con un menor coste financiero. Afortunadamente, en los últimos años se han dado constantes mejoras en la tecnología de las placas solares, por lo que su viabilidad ya no depende exclusivamente de sus beneficios ambientales o de subvenciones públicas, sino, que es una alternativa que puede ser viable económicamente en determinados casos. En concreto, en algunas regiones con una elevada escasez de recursos hídricos existe un importante desarrollo de las fuentes no convencionales, las cuales consumen una cantidad importante de energía, por lo que este trabajo estudia la posibilidad de sustituir parte de esa energía por autoconsumo a partir de placas solares fotovoltaicas. En términos generales, esta posibilidad se muestra viable desde el punto de vista financiero cuando el consumo energético es reducido, pues el ahorro que surge del autoconsumo año tras año permite compensar la importante inversión inicial que debe realizarse. No obstante, los menores precios unitarios cuando el consumo es elevado dificultan que las instalaciones de placas solares de elevado tamaño sean rentables en términos financieros.

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“…Between 2016 and 2020, an estimated 18.4 million m 3 /d is expected to be added to the world's contracted desalination capacity [6]. In Spain alone, the average CO2 emission of desalination plants was 6.99 kg/m 3 [33]. However, using a value of 1.8 kg/m 3 as the CO2 emission from recent plants with improved performance [9], one-third reduction in CO2 emission would lead to 4 Mt CO2 saving every year between 2016 and 2020.…”

Section: Fig 1 Decreasing Available Fresh Water Resources Per Head mentioning

confidence: 99%

Biomimetic membranes: A critical review of recent progress

et al. 2017

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A membrane material that can concurrently provide commercially acceptable levels of water permeability, high salt rejection, and of sufficient stability to withstand mechanical and chemical stresses seems to be necessary to guarantee the energy and environmental sustainability of desalination systems and other membrane separation processes. Recent developments in desalination have shown that bio-inspired membranes are moving steadily in this direction. Sustainable desalination via aquaporin-based bio-inspired membranes is elucidated in this paper in terms of recent commercialization exploitation and progress towards real operations. Current large-scale applications, viable opportunities, remaining challenges and sustainability of operations, in terms of comparison with established technologies, are discussed in this paper. The major drawback of aquaporin-based membranes, which has been highlighted repeatedly in recent studies, is the stability of the membranes during real operations. This review is focused on recent solutions provided by scientists towards the mitigation of these problems and commercialization of aquaporin-based membranes.

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The power efficiency of the Tajo-Segura transfer and desalination

Cited by 8 publications

References 8 publications

The Tariff Structure in the Tagus-Segura Water Transfer

The Tariff Structure in the Tagus-Segura Water Transfer

La viabilidad del autoconsumo energético por medio de placas solares en los servicios del agua en España

Biomimetic membranes: A critical review of recent progress

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