Desalination industry has become essential for the survival of the population in places with shortages of fresh water. Because is a costly process, the constant search for the best local renewable energy sources is a necessity.

A theoretical Multi-effect distillation plant of 9000 m³/d located in the southeast Spanish (Almería) is intended to fed thermally with solar (parabolic trough collectors) and geothermal energy.

Starting from the history of solar irradiation and temperatures of the province of Almería from 1994 to 2016 provided by Solargis database, a discrimination of the profile of temperatures is obtained at the exit of the solar panels. Putting in common the profile exit temperatures and the potentiality of the geothermal resource at the depth in the area under study, a series of possible configurations are obtained.

The theoretical results of the study indicate that during 76% of the annual time is achieved with both resources (solar and geothermal) at that depth of the well in that specific climatological zone (490 m, t = 41.8 °C).

Since the thermal gradient in the area is 8.87 °C per 100 m depth according to the studies carried out, only geothermal energy would be necessary at deep of 790 m to obtain working temperatures of the desalination plant at 70 °C.

Applying the results to the existing desalination plants of the Spanish project named Actions for the Management and Utilization of Water is obtained 6 years of amortization and 510,387,920 kg/y CO₂ avoided to the atmosphere for all of these plants.

在淡水短缺的地区，海水淡化行业已成为人们生存的关键。由于这是一个昂贵的过程，因此必须不断寻找最佳的本地可再生能源。

位于西班牙东南部（Almería）的理论上多效9000 m ³ / d的多效蒸馏装置旨在为太阳能（抛物槽收集器）和地热供热。

从Solargis数据库提供的1994年至2016年阿尔梅里亚省的太阳辐射历史和温度开始，就可以在太阳能电池板的出口处获得温度曲线的判别力。将研究区域的深度处的剖面出口温度和地热资源的潜力放在一起，得出了一系列可能的配置。

该研究的理论结果表明，在该特定气候区（490 m，t = 41.8°C）的井深处，两种资源（太阳能和地热资源）均可在全年的76％时间内实现。

由于根据所进行的研究，该地区的温度梯度为每100 m深度8.87°C，因此仅深层热能就可以在790 m的深处获得淡化厂在70°C的工作温度。

将结果应用于西班牙项目名为“水的管理和利用行动”的现有海水淡化厂，可以获得6年的摊销，所有这些厂均避免了向大气排放510,387,920千克/年的CO ₂。