A very high-temperature reactor self-sustainable oasis concept

Exergy analysis of a hydrogen and water production process by a solar-driven transcritical CO2 power cycle with Stirling engine

New trigeneration system integrated with desalination and industrial waste heat recovery for hydrogen production

Synergistic energy solutions: Solar chimney and nuclear power plant integration for sustainable green hydrogen, electricity, and water production

Integrated wind farm solutions: Harnessing clean energy for electricity, hydrogen, and freshwater production

Industrial case studies in the petrochemical and gas industry in Qatar for the utilization of industrial waste heat for the production of fresh water by membrane desalination

Exergoeconomic analysis and optimization of an integrated system of supercritical CO2 Brayton cycle and multi-effect desalination

In this study, the thermodynamic and thermoeconomic analysis of a multigeneration system which produces power, cooling, domestic heating, hydrogen and freshwater has been carried out. The main source of energy for this system is a solar parabolic trough collector (PTC). The working fluid applied for this solar collector is Al2O3-Therminol VP1 nanofluid. The subsystems of this multigeneration system are a steam Rankine cycle for power production, an organic Rankine cycle for power production, a double-effect absorption refrigeration system for cooling production, a domestic water heater for hot water production, a PEM electrolyzer for hydrogen production and a RO desalination unit for freshwater production. In the ORC cycle a TEG unit is applied instead of the condenser for extra power production. The system is analyzed by using the EES software. The effects of different parameters as well as the effects of nanoparticles on the performance of the proposed system were investigated. According to the results, the energy and exergy efficiency of the system are 33.81 % and 23.59 %, respectively. Among the studied working fluids in the ORC cycle, n-pentane shows the best performance. The energy and exergy efficiency of the system increases by the nanoparticle volume concentration and the solar radiation increase. Moreover, the collector inlet temperature has a negative effect on the hydrogen and freshwater production rates. Finally, it is proved that the PTC collector has the highest amount of exergy destruction rate in the studied system.

Design and test of a single effect thermal desalination plant using waste heat from m-CHP units

Seawater desalination has been proved as a reliable method for large-scale fresh water supply in arid and semi-arid regions, such as Middle East countries, since the middle of the twentieth century. However, those technologies are energy-intensive consumers, which rely habitually on the utilization of fossil energy sources. On the other hand, Concentrating Solar Power (CSP) plants have been proposed in those regions as clean alternatives for power production, since they have high levels of solar irradiation during the whole year. Therefore, the integration of CSP plants and desalination units for the joint production of electricity and fresh water in those zones benefits from the synergies presented. However, there is a lack of tools that determine the yearly fresh water and power production accurately, which is crucial for the proper selection of the best arrangement configuration and of the best operation strategies as a function of the electricity and water demands. The aim of this study is the development of a simulation tool that provides an accurate assessment of the annual power and fresh water production of an integrated CSP+D plant. For this purpose, models of each component of the integrated plant have been developed and implemented in different software environments. In particular, this work presents the integration between a Parabolic Trough Concentrating Solar Power (PT-CSP) plant with a Multi-Effect Distillation Thermal Vapor Compression (MED-TVC) unit that uses variable nozzle thermocompressors. The tool has been applied to a case study, taking Almería (Spain) as the location of the dual plant. Different coupling arrangements have been considered depending on the local water and power demands.

Tri-objective optimization of electricity, fresh water, and hydrogen production in a biomass-driven trigeneration plant: Thermoeconomic and environmental evaluation

Design and evaluation of a novel multi-generation system based on SOFC-GT for electricity, fresh water and hydrogen production

Dynamic multi-objective optimization applied to a solar-geothermal multi-generation system for hydrogen production, desalination, and energy storage

Summary In this study, a new integrated solar-energy based system for fresh water and electricity production is proposed and thermodynamically analyzed. The proposed system consists of a solar tower with a volumetric solar receiver, a Rankine cycle driven by solar power, molten salt storage subsystem and a multi-stage flash distillation (MFD) subsystem. In the present system, solar tower charges the molten salt, which flows through a heat exchanger to produce steam for the Rankine cycle. A part of the molten salt directly goes to hot storage tank after they are heated up by the solar tower. In order to keep the generated energy at the same level, molten salt in the hot storage tank compensates the deficient energy when direct normal irradiance (DNI) level is not sufficient. After the sunset, only the molten salt from the storage supplies energy to the cycle. The MFD produces the desired amount of fresh water from seawater. The seawater used for the distillation is heated by the saturated steam-water mixture coming from the steam turbine. Utilizing the output fluid as a heat source for the MFD also eliminates the external device for condensation. All system components of the integrated system are analyzed in the Engineering Equation Solver (EES). The overall energy and exergy efficiencies are calculated for each system component. The capacity of the power generation and fresh water production of the proposed system is also calculated. Moreover, a parametric study is undertaken to investigate the effects of varying ambient conditions on the system performance.

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

Techno-economic optimization of a biomass gasification energy system with Supercritical CO2 cycle for hydrogen fuel and electricity production