New solar still with energy storage: application to the desalination of groundwater in the Bou-Ismail region

Abstract

This study aims to develop efficient desalination equipment that increases the distilled water production rate and enhances heat transfer in the evaporator. It focuses on the impact of equipment geometry and energy storage during the daytime and nocturnal period. Besides, the effects of the energy storage system which is placed in two specific areas on the yield of the distillation process with and without energy storage have been studied. The heat exchanger system provides the energy to the water to be treated in the daytime while the concrete part provides the energy storage in the desalination evaporator at night time. The experimental test results showed that the increase of distilled water through the heating system is very important in comparison to the productivity of the conventional solar still. The obtained results indicate that the use of energy storage increases productivity by 50% in the nocturnal period. Indeed, the daily productivity of the concrete solar still is strongly affected by the heat transfer produced via concrete to the water evaporator is presented in this study. It was found that the average daily distillate output of concrete solar still with energy storage is more significant than the one of a solar still without energy storage.

Management of reverse osmosis concentrate by solar distillation

“…In the RO system, seawater is pressurized and passed via a specific membrane module that allows the permeation of water while eliminating all existent solutes (Tigrine et al 2021). In general, RO desalination consists of four main parts, namely pretreatment, a high-pressure pump, membrane modules, and post-treatment (Tigrine et al 2016).…”

“…According to Figure 5, the ambient temperature ranges between 24.5 and 33.9 °C, it increases as the solar radiation increases, which reaches its maximum of 850 w/m² between 12:00 h and 14:00 h PM for the study day (July 21st, 2019). The solar system reflects 11% of solar radiation considered the most influencing parameter of the functioning of the system as mentioned by several studies (Diaf et al 2016;Mohsenzadeh et al 2021;Tigrine et al 2021). During the offshine hours from 00:00 AM to 7:00 AM and from 21:00 PM to 00:00 AM, the solar irradiation, as well as the ambient temperature, is zero.…”

“…Several experimental and numerical works on solar stills have been reported in previous studies (Sheeba et al 2015;Tigrine et al 2015;Diaf et al 2016;Kumar et al 2016;Samuel & Kalidasa Murugavel 2017). Tigrine et al (2021) realized a new solar still with energy storage coupled with two solar collectors that are used for desalination of groundwater in the Bou-Ismail region. It was found that the average daily distillate output of a concrete solar still with energy storage is more significant than that of a solar still without energy storage.…”

Combined enhancement of evaporation and condensation rates in the solar still for augmenting the freshwater productivity using energy storage and natural fibres

“…It was found that the productivity of the solar still with sand troughs was enhanced by 71.4% compared to the CSS. Tigrine et al (2021) studied the performance of the solar still with energy storage and electric heater. It was observed that the solar-modified still had a better yield with 50% enhancement compared to the CSS.…”

IoT-based performance analysis of hybrid solar heater-double slope solar still

“…A recent study has been done to improve the heat transfer inside evaporator which allow increasing the yield of distilled water. It has been found that using energy storage enhance considerably the average daily of distilled output water (Tigrine et al 2021).…”