Fresh Water Production Rate Research Articles

A novel configuration of solar integrated waste-to-energy incineration plant for multi-generational purpose: An effort for achieving maximum performance

The efficiency of municipal solid waste to energy incineration plant is limited due to the higher amount of moisture content in the feedstock and huge heat loss. An innovative configuration is proposed in the present study to increase the performance of incineration plant. The new design consists of the integration of a solar thermal system with the incineration plant, so that the steam exiting the superheater of the municipal solid waste (MSW)incineration boiler is further heated by solar thermal system to increase its temperature and quality before entering the steam turbine. In addition, the flue gas is used to drive an iso-butane organic Rankine cycle to produce power that is utilized for hydrogen and freshwater production with the help of a proton exchange membrane electrolyzer and reverse osmosis system, respectively. Through a parametric analysis, the effect of major parameters on the performance of the proposed system is studied. The energy, exergy, and exergo-economic investigations are performed to access the system efficiencies, exergetic cost rates, sustainability index and total exergy destruction rate. The results show that the energy and exergy efficiencies of the integrated system are almost 21.34% and 16.64%, respectively, while thermal and exergy efficiencies of the MSW incineration plat are 37.35% and 35.22%, accordingly. The exergo-economic evaluation concludes that the exergy destruction rate of the system is 42965 kW with the rate of exergetic cost and total cost rate of 542 $/hr and 665 $/hr respectively. The sustainability index of the proposed system is calculated to be nearly 1.64, while fresh water and hydrogen production rates are 26.96 kg/s and 2.87 g/s, accordingly. In the end, the solar integrated waste-to-energy plant can provide multiple outputs simultaneously after adding the waste heat recovery system and the proposed system is theoretically feasible from the results of thermodynamic, economic, and environmental analysis.

Systematic analysis and multi-objective optimization of an integrated power and freshwater production cycle

This study represents the results of the analysis and optimization of an integrated system for cogenerating electricity and freshwater. This setup consists of a Solid Oxide Fuel cell (SOFC) for producing electricity. Unburned fuel of the SOFC is burned in the afterburner to increase the temperature of the SOFC's outlet gasses and operate a Gas turbine (GT) to produce additional power and operate the air compressor. At the bottom of this cycle, a combined setup of a Multi-Effect Desalination (MED) and Reverse Osmosis (RO) is considered to produce freshwater from the unused heat capacity of the GT's exhaust gasses. Also, a Stirling engine is used in the fuel supply line to increase the fuel's temperature. Using LNG and the Stirling engine will replace the fuel compressor with a pump which increases the system performance and eliminates the need for the expansion valve. To study the system performance a mathematical model is developed in Engineering Equation Solver (EES) program. Then, the system's simulated data from the EES has been sent to MATLAB to promote the best operating condition based on the optimization criteria. An energetic, exergetic, economic, and environmental analysis has been performed and a Non-dominated Sorting Genetic Algorithm (NSGA-II) is used to achieve the goal. The two-objective optimization is performed to maximize the exergetic efficiency of the proposed system while minimizing the system's total cost of production. This cost is a weighted distribution of the Levelized Cost of Electricity (LCOE) and Levelized Cost of freshwater (LCOW). The results showed that the exergetic and energetic efficiencies of the system can reach 73.5% and 69.06% at the optimum point. The total electricity production of the system is 99 MW. The production cost is 11.71 Cents/kWh, of which 1.04 Cents/kWh is emission-related and environmental taxes. The freshwater production rate is 42.44 kg/s which costs 4.38 USD/m3.

Numerical study on the effect of solar radiation intensity on the fresh water productivity of solar still equipped with Thermoelectric Cooling System (TEC) for hot and dry areas of Semnan

The fresh water crisis is one of the most important issues in the world and as a solution one of the most important methods of freshwater production is the evaporation of saline water by using of solar stills. Semnan province is one of the largest provinces in Iran. The province covers an area of 97,491 km 2 , which is 5.9% of the total area of the country. This province is the seventh largest province in Iran and is located almost in the central desert region of Iran. Due to its location on the solar belt, the desert areas of Semnan province are prone to the installation of solar cells, and according to the statistics of the General Meteorological Department of Semnan, this province has 325 sunny days in 365 days of the year. Therefore, this area is a great location for using clean solar energy. In this research, using the numerical method, the effect of the presence of the Thermoelectric Cooling System (TEC) on the performance of solar still, intensity and direction of solar radiation has been investigated to check their effect on the rate of freshwater production. The simulations were performed for Semnan city condition with the method of humid air in a three-dimensional, steady and laminar regime by solving the equations of continuity, Navier-Stokes, and water vapor concentration. The results show that there is a direct relationship between radiation intensity and water production rate and increasing radiation intensity increases the amount of produced freshwater. It was also observed that applying a TEC on a part of the glass can increase water production from 15% to 62%. The reason for this increase can be the increase in free convection due to the increase in the flow temperature gradient in designed solar still.

Thermal performance analysis of a solar still with different absorber plates and external copper condenser

Solar distillation is one of the cheapest and lowest energy consuming desalination processes to produce potable drinking water. The main obstacle of desalination process is the low production rate of fresh water owing to slow evaporation and condensation rate of the system. In this experiment, a double slope solar still (SS) is modified by using two different modified absorber plates and an external copper condenser (ECC). Absorber plates are modified by employing triangular and rectangular channels as they increase surface area of the absorber plates to increase heat transfer to the basin water and hence increase evaporation rate of water. ECC is designed in such a way that provides extended cool surface area in addition with glass surface to increase condensation rate. Experiments are done in the month of October for 7 days and comparative analysis is done to determine the best modification out of the 5 modifications (conventional SS, SS with triangular channeled (TC) with and without ECC and SS with rectangular channeled (RC) with and without ECC) in terms of productivity and efficiency. The maximum average productivity obtained among all the modifications is 1.7 ± 0.1 L/m2 while experimenting with SS with TC absorber plates and ECC. The maximum average overall efficiency and maximum average instantaneous efficiency both are obtained with SS with TC and ECC which are 17.86 ± 0.6% and 18.2 ± 1.6% respectively. Addition of ECC increased the average productivity by 0.66 L/m2 and overall efficiency by 7.52% than conventional SS. The economic analysis of the SSs is also conducted, and results represent that the modified SSs are approximately 55.57% cost effective than the conventional SS.

Performance assessment and multi-objective optimization of a multi-generation system based on solar tower power: A case study in Dubai, UAE

This paper designs and evaluates an innovative multigeneration system based on a heliostat solar field that is a combination of closed Brayton cycle, absorption refrigeration cycle, humidification and dehumidification desalination, and proton exchange membrane electrolyzer. Thermodynamic and exergoeconomic analyses are performed for the performance assessment. Moreover, the grey wolf optimization algorithm in different multi-objective optimization scenarios is implemented to obtain the optimum operating conditions and desirable performances. According to the obtained results, the simulation at the base operating conditions is led to generating 8.32 MW of power, 3.16 kg/s of freshwater, 8.37 MW of cooling load, and 0.22 kg/h of hydrogen with 39.15% exergy efficiency and 8.81 $/GJ sum unit cost of products. Moreover, the lowest payback period and maximum profitability are related to the electricity price of 0.07 $/kWh, with a payback period of 2.93 years. Also, at the optimum point, the exergetic efficiency with SUCP and freshwater production rate are considered obtained to be 45.09%, 8.27 $/GJ, and 3.89 kg/s. Finally, the proposed system performance was evaluated for a case study of Dubai, UAE. It is resulted that the maximum net power obtained in May during a yearly operation by about 7.40 MW with exergetic efficiency of 38.70%.

Designing salt transmission channel of solar-driven multistage desalination device for efficient and stable freshwater production from seawater

Solar-driven passive multistage distillation (MSD) device provides a new approach for environmentally friendly freshwater production. However, the MSD device easily forms salt crystals on the evaporation surface when treating brine, resulting in performance degradation. Here, we design an MSD device with an effective salt-resistant structure to enable rapid and automatic removal of high-concentration brine by a gravity drive. The structure was optimized by laboratory experiments and simulation. As a result, the stable freshwater production rate of the 4-stage device can reach 1.98 kg m−2 h−1 under a 1 kW m−2 light intensity. In particular, the MSD device can work stably at a high light intensity of 4 kW m−2 with an evaporation rate of 8.26 kg m−2 h−1, making its freshwater yield more than 1.7 times higher than that of a device without a salt-blocking structure. In summary, we explored a new method for salt removal in MSD devices, which is a meaningful method for long-term seawater desalination.

Upscaling 3D Engineered Trees for Off-Grid Desalination.

More than 70% of the population without access to safe drinking water lives in remote and off-grid areas. Inspired by natural plant transpiration, we designed and tested in this study an array of scalable three-dimensional (3D) engineered trees made of natural wood for continuous water desalination to provide affordable and clean drinking water. The trees took advantage of capillary action in the wood xylems and lifted water more than 1 foot off the ground with or without solar irradiation. This process overcame some major challenges of popular solar-driven water evaporation and water harvesting, such as intermittent operation, low water production rate, and system scaling. The trade-off between energy transfer and system footprint was tackled by optimizing the interspacing between the trees. The scaled system has a ratio of surface area (vapor generation) to project area (water transport) up to 118, significantly higher than the prevailing flat-sheet design. The extensive surface area evaporated water at a temperature cooler than the surrounding air, drawing on multiple environmental energy sources including solar, wind, or ambient heat in the air and realized continuous operation. The total energy for evaporation reached over 300% of the one-sun irradiance, enabling a freshwater production rate of 4.8 L m-2 h-1 from an array of 16 trees in an enclosed room and 14 L m-2 h-1 under a 3 m/s airflow. Furthermore, we found that the ambient heat in the air contributed 60%-70% of the total latent heat of vaporization when energy sources were decoupled. During long-term desalination tests, the engineered trees demonstrated a self-cleaning mechanism with daily cycles of salt accumulation and dissolution. Combining the quantification from an evaporation model and meteorology data covering the globe, we also demonstrated that the 3D engineered trees can be of particular interest for sustainable desalination in the Middle East and North Africa (MENA) regions.

Decreasing In Freshwater Production Due To Vacuum Pressure Decreasing On Multi Effect Distillation Installation


 
 
 
 A case study in a steam power plant has been conducted and reported. There was a case of decrease in the freshwater production rate in multi effect distillation installations that may disrupt the operation of the power plant. The cause was suspected by the drop in vacuum pressure in the evaporation chamber. The study was conducted by studying the MED installation process diagram and performing the theoretical calculations of energy and mass equilibrium in each chamber. To make it easier to find the properties of water in the energy calculation then add ins water_97 in Microsoft Excel is added.Calculations were undertaken in two modes, commissioning period and 2016 operation mode. The difference of the two modes was vacuum pressure level in each chamber. Vacuum pressure level in 2016 operation mode was lower than commissioning mode. The calculation at commissioning mode resulted in a production rate of 133.56 ton/h, while the actual condition at that time was 127 ton/h. Calculations in 2016 operation mode produced a theoretical fresh water production rate of 101.37 ton/h.
 
 
 

Thermo-economic comparison of two models of combined transcritical CO2 refrigeration and multi-effect desalination system

Combined refrigeration and boosted multi-effect desalination systems (B-MED) are very useful and energy efficient for water and cold cogeneration. This study aims to improve such an integrated system. An original system of a combined transcritical CO2 refrigeration and boosted multi-effect desalination is studied and analyzed at 85 ℃ inlet heat source temperature; the desalination cycle in the original system (1B-MED) consists of six effects and one booster module. The original model is modified by adding another booster module; the desalination cycle in the modified system (2B-MED) consists of six effects and two booster modules at 85 ℃. By increasing the inlet heat source temperature, the number of effects increases. A Thermo-economic analysis is obtained to analyze and assess the two systems at different inlet heat source temperatures 85–110 ℃ with a various number of effects 6–11 effects. The results show that the modified system with two booster modules is thermo-economically more efficient than the original one with one booster module since the freshwater production rate increases by around 65, 74, 82, 87, 97 and 104 m3 per day at 85, 90, 95, 100, 105, and 110 ℃, respectively, with an increasing rate of 22 % – 23 %. Moreover, the unit product cost UPC of the modified system decreases to reach its lowest value at 105, 110 ℃, with a decreasing rate of more than 25 % compared to the original model with one booster module.

Optimization of influential geometrical parameters of single slope solar still equipped with thermoelectric system to achieve maximum desalinated water

Solar water desalinators are based on water evaporation and are more important in areas with high evaporation capacity and water scarcity. Today, desalination water performance is improved using various methods. One method is to use a Thermo-Electric Cooling (TEC) system. In the present study, using the numerical solution and humid air method, the effect of the dimensions of single-slope solar still with TEC on water production rate is simulated. The simulation is steady, incompressible, and laminar. To evaluate the effect of desalination dimensions, changes in length, small height, and length of the thermal surface of the cooling system were used. The results show that production in the TEC system is higher than conventional desalination. The trend of changes in water production with increasing parameters of length, small height, and length of the thermal surface of the cooling system is descending, ascending, and ascending, respectively. One of the main reasons for these changes in the number of rotational flows is due to dimensional changes. Meanwhile, in case of increasing the flow velocity due to the increase of free convection, the water production rate will increase. Based on results with a 50 % increase in L, the freshwater production rate was decreased by about 10 %. Also by applying the thermoelectric system a 6.8 % improvement in the freshwater production rate was reported. The main purpose of this study is to increase the efficiency of freshwater production in single-slope solar still by equipping it with a thermoelectric cooling system and also by geometric optimization of solar still.

Experimental investigation of a pyramid type solar still with porous material: productivity assessment

PurposeThis study aims to investigate the effect of porous material (clay pots) and it is facing on the productivity performance of a pyramid type solar still. The clay pots are placed in the basin facing up and facing down. The numbers of clay pots considered were 9 and 25, and its performance was compared with normal (0 clay pots) solar still.Design/methodology/approachThe pyramid solar water distillation system has been designed, fabricated and tested under the actual environmental conditions of Kanchikacherla (16.6834 0N, 80.3904 0E), Andhra Pradesh, India. The solar still is used to produce the fresh water and hot water simultaneously from the brackish (i.e. containing dissolved salts) feed water for domestic applications. From open literature, it was established that the rate of evaporation is higher when the flowing water is held for a longer duration on the black color absorber plate, thereby leading to an increase in productivity of freshwater. Therefore, the pyramid solar still has been tested for smooth absorber plate and the absorber plate with porous heat storage material.FindingsThe porous material increases the production rate of freshwater compared to a base plate. However, the pyramid still with clay pots has higher productivity at a lower temperature because of the porosity effect.Originality/valueThe total dissolved solids, electrical conductivity and pH of the distilled water and the saline water have also been measured and compared.

Pore-size engineered nanoporous silica for efficient adsorption cooling and desalination cycle

Adsorption cooling and desalination (ACD) system powered by renewable energy has been considered as a promising solution to solve interconnected global problems such as freshwater scarcity, high-cost air conditioning, CO2 emission, and global warming. In this work, a new nanoporous silica was synthesized through a self-assembly process using a combination of ionic and non-ionic surfactants. The silica has shown unique pore structures, including high surface area and large pore volume, as well as ideal pore size distribution. The new silica was deposited (coated) over the ligaments of aluminum foam for use as a sorption bed. An uncoated aluminum foam packed with conventional silica RD (regular density) particles serves as a baseline sorption bed. The freshwater production rate and cooling power produced using the two sorbents were compared. Silica RD outperforms the new silica for cooling while the new silica is far better for desalination application. Insights for such results are provided.

Effect of working fluids in a novel geothermal-based integration of organic-flash and power/cooling generation cycles with hydrogen and freshwater production units

One of the essential steps to design energy conversion-based systems is choosing an efficient working fluid under the design goals to access stable products with high efficiency and overcome environmental issues. In this regard, the current paper is motivated to devise and evaluate a novel geothermal-driven multigeneration system under the effect of various working fluids. The proposed system consists of a flash-binary geothermal power plant, an organic flash cycle (OFC), a power/cooling subsystem (an organic Rankine cycle (ORC) and a thermoelectric generator incorporated with a compression refrigeration cycle), and freshwater and hydrogen production units utilizing a humidification-dehumidification desalination unit and a low-temperature electrolyzer. Considering the design potential of the OFC and ORC, four different environmentally-friendly working fluids, i.e., R123 and R600 in the OFC and R1234yf and R1234ze(e) in the ORC are selected and classified in four groups to introduce the best one, under the energy, exergy, and economic (3E analysis) approaches. Also, the whole system is optimized through a genetic algorithm, respecting the optimal solution for the energy efficiency and unit exergy cost of the products. According to the results, R123/R1234ze(e) shows the highest cooling, hydrogen, freshwater production rates, and energy efficiency. Likewise, the maximum power generation and exergy efficiency belong to R600/R1234ze(e). Moreover, R600/R1234yf has the lowest unit exergy cost of products.

The influence of fresh water production rate on the economics of two dual-purpose power/water plants: a case study

ABSTRACT The technical and economic analysis of the dual-purpose power/water Solar Rankine Cycle (SRC) coupled with Multi-Effect Desalination (MED) system was investigated. The influence of using Thermal Vapor Compression (TVC) on the unit costs of the generated power and water was also studied. Due to the population increase in the southern touristic coastal region of Iran and decreasing trend of the fuel price subsidy over the recent years, the government interest is shifting to the use of solar thermal energy and integrating the MED or MED-TVC desalination units with the conventional Rankine cycles, and to apply the solar thermal energy to reduce the fuel consumption. The water production rate of the MED or MED-TVC plants integrated into the SRC can significantly affect the electrical performance and consequently the fresh water and electricity unit of costs which has been rarely reported in the literature. In this regard, a comparison was made between the SRC-MED and SRC-MED-TVC configurations under two different scenarios of 6 and 12 hours of thermal energy storage. The output temperature of the LF solar field was considered to be regulated by defocusing the field mirrors and changing the working fluid mass flow rate. The unit costs of electricity (COE) and fresh water (COW) for both plants were determined under different scenarios of the water production capacities. Based on the results, COE and COW range from 0.20$/kWh to 0.25$/kWh and from 1.25$/to 3$/, respectively, for different water production rates. Also, for water production rates of more than 80,000/day, the SRC-MED plant has lower COE and COW as compared to the S‌RC-MED-TVC plant. While the COE and COW of the SRC-MED-TVC plant are less than those of the other plant for water production rates of less and equal to 36,000/day.

Integrated solar-driven PV cooling and seawater desalination with zero liquid discharge

<h2>Summary</h2> Utilizing the "waste heat" of solar cells for desalination enables the simultaneous production of freshwater and electricity and represents low barrier-of-entry electricity and freshwater supplies to off-grid communities for point of consumption. Herein, guided by theoretical modeling, this project demonstrated that a higher freshwater production rate and a lower solar cell temperature could be achieved simultaneously. With a five-stage photovoltaics-membrane distillation-evaporative crystallizer (PME), we experimentally demonstrated a high and stable freshwater production rate of ∼2.45 kg m⁻² h⁻¹ and a reduced solar cell temperature of ∼47°C under 1 sun irradiation, as compared to ∼62°C of the same solar cell working alone. The reduced solar cell temperature led to an 8% increase in its electricity production. Moreover, the concentrated brine produced in the process was fully evaporated by the underlying evaporative crystallizer, achieving zero liquid discharge. We expect that our work will have important implications for the understanding and advancement of solar distillation.

A Novel Electricity and Freshwater Production System: Performance Analysis from Reliability and Exergoeconomic Viewpoints with Multi-Objective Optimization

Based on the benefits of integrated gasification combined cycles (IGCCs), a cogeneration plant for providing electricity and freshwater is proposed. The main novelties of the devised system are the integration of biomass gasification and a regenerative gas turbine with intercooling and a syngas combustor, where the syngas produced in the gasifier is burned in the combustion chamber and fed to a gas turbine directly. The energy discharged from the gas turbine is utilized for further electricity and freshwater generation via Kalina and MED hybridization. The proposed system is analyzed from energy, exergy, exergoeconomic, and reliability–availability viewpoints. The optimal operating condition and optimum performance criteria are obtained by hybridizing an artificial neural network (ANN), the multi-objective particle swarm optimization (MOPSO) algorithm. According to results obtained, for the fourth scenario of the optimization process, optimal values of 45.10%, 14.27 kg·s−1, 12.95 USD·GJ−1, and 8141 kW are obtained for the exergy efficiency, freshwater production rate, sum unit cost of products, and net output power, respectively. According to reliability and availability assessment, the probability of the healthy working state of all components and subsystems is 88.4403%; the system is shown to be 87.74% available of the time over the 20-year lifetime.

Process optimization and revamping of combined-cycle heat and power plants integrated with thermal desalination processes

Optimal revamping, sizing, and operation of an existing gas-turbine combined-cycle dual-purpose power/desalination plant – simultaneous electricity and freshwater generation – which operates with a heat recovery steam generation with one-pressure level (1P-HRSG) and a multi-stage flash desalination process, is addressed. The sizes and configurations of the gas turbine and desalination unit are kept the same as in the existing plant through the study. However, the 1P-HRSG is conveniently extended to two- or three-pressure levels with different exchanger arrangements, including steam reheating. To this end, a superstructure-based representation of the HRSG simultaneously embedding several candidate structures was proposed and a mixed-integer nonlinear programming model was derived from it.One revamping case consisted in maximizing the ratio between the freshwater production rate and the heat transfer area of HRSG, keeping unchanged the electricity generation rate (around 73 MW). It was found that the inclusion of a 3P-HRSG resulted in an increase of 13.782 kg⋅s−1 in the freshwater production, requiring 22753 m2 of heat transfer area less in the HRSG. Another revamping case consisted in maximizing the profit, contemplating the possibility to sell extra amounts of electricity and freshwater. Sale prices, for which producing extra electricity and freshwater is beneficial, were determined.

Design and cost estimation of solar powered reverse osmosis desalination system

Photovoltaic assisted reverse osmosis (PV-RO) has been proven an efficient renewable energy-based desalination technique to provide drinkable water, especially in remote areas. In this manuscript, a simulation based RO design system was adopted to evaluate the desalination performance for three cities of Pakistan, that is, Lahore, Hasil Pur, and Faisalabad. The inlet concentration of Lahore, Hasil Pur, and Faisalabad was reduced from 1495, 2190, and 7683 TDS to 295.44, 237.69, and 241.98 TDS respectively, according to the WHO drinking water recommendations. The RO desalination system was integrated with the photovoltaic system to fulfill the energy requirement for desalination. The energy requirement for the RO system for the working of 10 h/day with the freshwater production rate of 0.80 m3/h for Lahore, Hasil Pur, and Faisalabad is 60, 95, and 311 kWh/month, respectively. According to PVsyst software, the energy demand can be accomplished by installing 9 PV panels in Lahore, 15 PV panels in Hasil Pur, and 40 PV panels in Faisalabad. The simulation results in PVsyst showing that the battery losses will be 52.2% in Lahore, 51.1% in Hasil Pur, and 49% in Faisalabad.

Transient performance of a solar humidification–dehumidification desalination system based on hollow fiber membrane

Abstract Solar humidification–dehumidification desalination system based on hollow fiber membrane is a promising method to produce drinkable water from brine due to its abilities for low primary energy consumption and pollution prevention for the liquid seawater droplets. As operating conditions change with temporal weather conditions, a dynamic model of this desalination system is developed and experimentally validated in this study. Transient performance is investigated and a regulation strategy is proposed. It is found that the startup time can be reduced substantially by decreasing the mean pore diameter, porosity of the membrane, solar collector area, and volume of the seawater in the storage tank, and increasing the packing fractions of the humidifier. The specific freshwater production (SWP) rate at the equilibrium state grows with longer mean pore diameter, higher porosity of the membrane, more solar collector areas, and less packing fractions of the humidifier. SWP is basically constant with different volumes of the seawater in the storage tank. Variations of solar radiation cause the low freshwater production and high energy consumption especially in the morning and afternoon. Utilizing our model, the hour-by-hour adjustment is also established. The accumulated water production in 1 day can be increased by 13.5% and the energy consumption can decrease by over 23% based on decreasing flow rates of the seawater in the morning and increasing flow rates of the cooling water in the afternoon. The proposed dynamic model will be helpful for the daily regulation of the seawater desalination system and a better performance can be realized.

Open loop heat pipes for high-efficiency desalination plant

A seawater desalination plant based on open loop heat pipes (OLHPs), coupling with the low pressure steam turbine (LPST) extraction, is presented in this work. The steam extracted from the LPST is a heat source for the sea water evaporation. The sea water circulation is provided by the siphon effect, while the sea water evaporation takes place in the specially designed heat pipes. It can utilize low-grade power plant heat for high-efficiency seawater desalination and realize co-generation of electricity and fresh water without using any additional mechanical equipment. The prototype of the installation is implemented at an existing thermal power plant in Guangdong, China. Results of this study show that the plant can start up quickly and operate stably by using power plant condensation heat. A freshwater production rate of 20.5 L/h can be sustained when working with 55 °C heat steam and the value increased to 64.8 L/h with 86 °C heat steam. The successful operation of the plant has provided valuable experience for low-grade power plant heat harvesting and an efficient approach for seawater desalination.