Browsing by Author "Casimiro, Sergio"
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- CSP technology developments and cost reduction: Innovative heat storage and desalination: Cogeneration simulationsPublication . Casimiro, Sergio; Cardoso, João P.; Mendes, J. Farinha
- Experimental validation of MED forward feed steady-state modelPublication . Casimiro, Sergio; Alarcón-Padilla, Diego-César; Ioakimidis, C.; Mendes, J. FarinhaIn this work the validation of a physical model to simulate the performance of an MED forward feed system is done by comparing results of the model with real data obtained. The data was obtained using the experimental MED plant at Plataforma Solar de Almeria (PSA) under steady-state operation near design conditions. The results indicate that the model can be used to make a first analysis on these type of systems.
- MED parallel system powered by concentrating solar power (CSP): model and case study: Trapani, SicilyPublication . Casimiro, Sergio; Cardoso, João P.; Ioakimidis, C.; Mendes, J. Farinha; Mineo, Carmelo; Cipollina, AndreaThis work presents an overlook on a new model that simulates the physical operation in steady state of a multi-effect distillation (MED) plant with parallel-feed (P) configuration. This model includes the consumption of steam with steam ejectors, and its validation was done using data from a real MED industrial plant using a thermal vapor compressor (TVC) operating in Italy, in the Sicilian city of Trapani. Results show that the MED model returns accurate predictions of the plant behavior, very useful for a first analysis on such type of investments. This MED model was also integrated into the system advisor model developed by the US National Renewable Energy Laboratory. Simulations with this new tool were run using the location of Trapani as case study for a concentrating solar power (CSP) plant working in cogeneration with a low-temperature MED-P plant vs. other cooling options available for CSP plants (wet cooling, dry cooling, and a once through seawater cooling circuit). These results were compared with the existing TVC-MED plant, and indicate that CSP+MED has the potential to be economically attractive.
- Modeling in TRNSYS of a single effect evaporation system powered by a Rankine cyclePublication . Casimiro, Sergio; Ioakimidis, C.; Mendes, J. Farinha; Lima, Maria Margarida de Lemos Canedo GiestasThe paper presents an analysis of a Single Effect Evaporation (SEE) system as a pre-study to the feasibility of concentrated solar power plants (CSP) powering desalination units for cogeneration of water and electricity. An algorithm to model a SEE system in steady-state operation was made and is described in this work. This algorithm was implemented in TRNSYS environment, and a simple analysis was conducted of a SEE system powered by a Rankine cycle used in CSP plants.
- Modeling multi effect distillation powered by CSP in TRNSYSPublication . Casimiro, Sergio; Cardoso, João P.; Alarcón-Padilla, Diego-César; Turchi, Craig; Ioakimidis, C.; Mendes, J. FarinhaThis work presents the results of using a new tool to simulate the cogeneration of water and electricity with Concentrating Solar Power (CSP) and Forward Feed Multi-Effect-Desalination (FF-MED) plants, by adding a new functionality to the System Advisor Model (SAM) developed by the US National Renewable Energy Laboratory (NREL). The controlling strategy of the MED model is presented in detail, and a case study application is shown. This study compares the results obtained with a CSP plant operating in San Diego, CA, with four different cooling systems: an MED/Seawater Cooling Circuit (SWCC), dry cooling, wet cooling, and a SWCC standalone. The results show that the usage of an MED/SWCC system in cogeneration with a CSP plant can be feasible and has the potential to be economically interesting.
- Modeling Multi Effect Distillation powered by CSP in TRNSYS: Case Study using System Advisor Model (SAM): San Diego, CAPublication . Casimiro, Sergio; Cardoso, João P.; Alarcón-Padilla, Diego-César; Turchi, Craig; Ioakimidis, C.; Mendes, J. Farinha
- Reverse osmosis powered by concentrating solar power (CSP): a case study for Trapani, SicilyPublication . Ahmed, Mahran K. A.; Cardoso, João P.; Mendes, J. Farinha; Casimiro, SergioThe objective of this paper is to analyse the physical performance of two technologies in a water and electricity co-generation scheme: Concentrated Solar Power (CSP) plant coupled to a Reverse Osmosis (RO) unit for a location in the city of Trapani, in southern Italy. The modelled system is compared with the results of another study [2], in which a Multi-Effect Desalination (MED) is powered by a CSP plant for the same location in Italy, using as reference an existing stand-alone gas powered MED plant located at Trapani [3] (which has operated until very recently). The overall aim is to assess and compare these two cogeneration schemes, using as reference the existing MED plant. This work was conducted using as the main simulation tool: the System Advisor Model (SAM) developed by the US National Renewable Energy Laboratory (NREL); a recent upgrade to SAM made available to this work through Laboratório Nacional de Energia e Geologia I.P. (LNEG); and the Reverse Osmosis System Analysis (ROSA) developed by the Dow Chemical Company. A technical visit to a real commercial RO plant in the south of Portugal (Alvor) was conducted, and the data gathered was used in the validation of the ROSA model. The results for the Trapani case study show that the CSP-RO arrangement has the capability to produce ~50% of the total production of the full scale plant at Trapani, if operated at nominal capacity, year round. Also, the CSP-RO system provides ~20% more electricity and water than the CSP-MED system throughout the studied period of one year. The two co-generation schemes provide promising potential to fight the issues related to fresh water shortages and dependency on fossil fuelled desalination. Thus, they can aid in decreasing the effects associated with CO2 emissions and climate change.