How can Desalination Plants be Facilitated by Small Gas Turbines

2022-05-28 13:32:32 By : Mr. Stephen Zhang

We use cookies to enhance your experience. By continuing to browse this site you agree to our use of cookies. More info.

In an article recently published in the open-access journal Energies, researchers discussed the feasibility of hybrid desalination of plants with small gas turbine combined heat and power (CHP) systems.

Study: Feasibility of Hybrid Desalination Plants Coupled with Small Gas Turbine CHP System s. Image Credit: Andrea Izzotti/

Freshwater shortages have become more prevalent in several parts of the world in recent decades. Because current desalination devices use a lot of energy, researchers wanted to see whether there were any alternatives that could improve the overall efficiency of these systems.

The most common thermal technologies are multi-effect distillation (MED) and multi-stage flash (MSF). It is incredibly easy to apply the cogeneration idea for energy savings, which is highly recommended because it can be carried out using waste heat from a standalone power plant, resulting in the lowest desalination costs.

Reverse osmosis (RO) membranes have become the most common solid removal technique among membrane desalination systems. It is believed that using hybrid desalination methods will improve the efficiency of desalination plants (DPs). In theory, this technology is being utilized as an alternative to using thermal desalination methods to improve the quality of the water generated by RO membranes.

The gas cycle integration with desalination units is recommended, as it allows for the use of waste heat from the exhaust to provide the energy needed for thermal desalination methods. From an economic standpoint, it is highly recommended to provide the required heat by utilizing the high potential exhaust gas.

Schematic of the hybrid desalination plant coupled with the GT CHP system. Image Credit: Noori, A. W. et al., Energies

In this study, the authors looked into the feasibility of combining a small gas turbine combined heat and power system (GT CHP) with hybrid desalination plants (HDPs). To better harness the electrical and thermal energy produced by the micro-CHP plant, a hybrid desalination technique based on the employment of two different desalination technologies was adopted.

The proposed system was quantitatively analyzed from both a thermodynamic and an economic standpoint. For comparison with the hybrid solutions, the economic assessment of the standalone desalination systems was also shown.

The team used the design process to utilize tiny CHP power plants for off-grid applications. Economic analysis was presented to analyze the cost of produced water. The planned plant used a simple gas topping cycle, i.e., Brayton–Joule cycle.

The maximum turbine inlet temperature was set by the material. To assure the mechanical durability of the turbine this value was chosen at 950 °C. The proposed power system was combined with a hybrid desalination plant that combined two desalination technologies. The power plant's size was determined by the upper limit of the GT architecture, which used single-stage radial machinery for the compressor and turbine.

The researchers conducted a cost-benefit analysis of various desalination methods for an integrated small gas cycle with a hybrid desalination plant. The coupling of water desalination to the proposed gas cycle-based plants on the two probable scenarios of hybrid seawater desalination was done and explored in order to attain this goal. A cost-benefit analysis of independent desalination plants was also performed.

The techno-economic evaluation flowchart based on the DEEP program.Image Credit: Noori, A. W. et al., Energies

The MSF system, which needed temperatures of the order of 90–120 °C, imposed the most restrictive temperature condition on the two types of proposed thermal processes. The heat recovery steam generator recovered a substantial amount of heat power due to the high value of the turbine outlet temperature.

It was demonstrated that the high potential of the proposed hybrid DP, which allowed for the simultaneous provision of both electric and thermal power to the two desalination processes, maximized freshwater production per unit fuel mass flow rate.

The suggested gas turbine power generation system, which was based on a single-stage centrifugal compressor and an uncooled centripetal turbine, allowed for easy design and low installation costs. The total cost of water produced by multi-effect distillation (MED) + RO was lower than the total cost of water acquired by multi-stage flash (MSF) + RO, and the energy cost of the RO + MED hybrid desalination system was roughly 15% lower than the energy cost of stand-alone RO desalination technology.

As a result, the RO + MED hybrid desalination system could be considered a potential alternative for coupling with the suggested tiny GT CHP plant, which could be easily deployed in off-grid or isolated places due to its affordability, small size, and ease of installation.

According to the results, the total cost of the water produced by MSF + RO technology was around 6.7% more than the cost of the produced water by MED + RO technology. By expanding the total capacity of both MSF + RO and MED + RO desalination facilities, the water costs were reduced from 1.085 to 0.96 $/m3 and 1.17 to 1.05 $/m3, respectively. The overall energy cost of the MED + RO desalination system was 0.341 $/m3.

Total cost of produced water versus the total capacity (degree of hybridization = 35%). Image Credit: Noori, A. W. et al., Energies

In conclusion, this study proposed the deployment of compact power plants based on gas turbine engines as the energy source. The water cost of the proposed scheme was lower than the water cost of the renewable-based power plant.

The authors mentioned that in the event that relevant fuel costs rise, the water cost differential between the methods provided in this study and those using renewable energies may become lower.

Noori, A. W., Royen, M. J., Medved’ová, A., et al. Feasibility of Hybrid Desalination Plants Coupled with Small Gas Turbine CHP Systems. Energies 15(10) 3618 (2022).

Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.

Surbhi Jain is a freelance Technical writer based in Delhi, India. She holds a Ph.D. in Physics from the University of Delhi and has participated in several scientific, cultural, and sports events. Her academic background is in Material Science research with a specialization in the development of optical devices and sensors. She has extensive experience in content writing, editing, experimental data analysis, and project management and has published 7 research papers in Scopus-indexed journals and filed 2 Indian patents based on her research work. She is passionate about reading, writing, research, and technology, and enjoys cooking, acting, gardening, and sports.

Please use one of the following formats to cite this article in your essay, paper or report:

Jain, Surbhi. (2022, May 18). How can Desalination Plants be Facilitated by Small Gas Turbines. AZoM. Retrieved on May 28, 2022 from

Jain, Surbhi. "How can Desalination Plants be Facilitated by Small Gas Turbines". AZoM. 28 May 2022. <>.

Jain, Surbhi. "How can Desalination Plants be Facilitated by Small Gas Turbines". AZoM. (accessed May 28, 2022).

Jain, Surbhi. 2022. How can Desalination Plants be Facilitated by Small Gas Turbines. AZoM, viewed 28 May 2022,

Do you have a review, update or anything you would like to add to this news story?

In this interview, AZoM talks to Chris Aylott, Senior Engineer at Newcastle University, about fatigue testing in the development of low carbon transport solutions.

AZoM speaks with Dr. Nicola Ferralis from MIT about his research that has developed a low-cost process of creating carbon fibers from hydrocarbon pitch. This research could lead to the large-scale use of carbon fiber composites in industries that have thus far been limited.

In this interview, AZoM speaks with Marco Enger, Senior Tribologist from GGB, to discuss how nano fillers affect transfer films within tribological systems.

This product profile outlines the Versa Flex Checkweighers from Thermo Fisher Scientific.

The LQA 300 FT-IR wine analyzer combines performance, accuracy, ease-of-use, and speed for the analysis of finished wine, must and must under fermentation samples in less than 45 seconds—all in one compact solution.

The SpectraStar™ XT-R Benchtop NIR can analyze virtually any sample type in less than a minute, including solid, slurry, or liquid samples.

This article provides an end-of-life assessment of lithium-ion batteries, focusing on the recycling of an ever-growing amount of spent Li-Ion batteries in order to work toward a sustainable and circular approach to battery use and reuse.

Corrosion is the degradation of an alloy caused by its exposure to the environment. Corrosion deterioration of metallic alloys exposed to the atmosphere or other adverse conditions is prevented using a variety of techniques.

Due to the ever-increasing demand for energy, the demand for nuclear fuel has also increased, which has further created a significant increase in the requirement for post-irradiation examination (PIE) techniques. - An AZoNetwork Site

Owned and operated by AZoNetwork, © 2000-2022