Multi-objective optimization for efficient modeling and improvement of the high temperature PEM fuel cell based Micro-CHP system
TL;DR: This study presents a multi-objective optimization method to provide an optimal design parameters for the HT-PEMFC based micro-CHP during a 14,000 h lifetime by considering the effect of degradation to optimize the net electrical efficiency and the electrical power generation.
About: This article is published in International Journal of Hydrogen Energy.The article was published on 2020-02-28. It has received 29 citations till now. The article focuses on the topics: Multi-objective optimization & Electrical efficiency.
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TL;DR: In this article, a three-dimensional non-isothermal dynamic model is developed to investigate start-up time and temperature distribution during the startup process of a high temperature proton exchange membrane fuel cell (HT-PEMFC).
25 citations
TL;DR: A comprehensive mixed integer linear programming (MILP) model for unit commitment (UC) in CHP MGs including fossil-fueled power-only DGs, boilers, CHP units, photovoltaic, wind and geothermal power units, solar heater, battery charging station (BCS), adjustable thermal loads, battery energy storage (BES) and thermal energystorage (TES) units is proposed.
Abstract: Combined heat and power (CHP) microgrids (MGs) are a set of CHP units, boilers, power-only distributed generation (DG) units and storage systems that simultaneously supply heat and power demand. In this research, the objective is to provide a comprehensive mixed integer linear programming (MILP) model for unit commitment (UC) in CHP MGs including fossil-fueled power-only DGs, boilers, CHP units, photovoltaic, wind and geothermal power units, solar heater, battery charging station (BCS), adjustable thermal loads, battery energy storage (BES) and thermal energy storage (TES) units. In the proposed model, all operational constraints of CHP units, boilers and power-only units such as minimum up/down time and start-up/ shut-down ramp rate limits are considered and the commitment history of generation units prior to operation horizon is considered. In the proposed model, type II CHPs with non-convex feasible operating region (FOR) are used and their non-convex FOR is transformed into two convex FORs. The proposed model is solved with CPLEX solver in general algebraic modeling system (GAMS) which guarantees the achievement of the global optimum. The model is solved for different scenarios wherein the effect of BCS, effect of storage systems as well as the effect of adjustability of loads on MG operation is investigated. According to the results, BES and TES respectively decrease MG operation cost by 7.4% and 1.82%.and BCS adds 20.19% to the MG operation cost. The results also show that with replacement of adjustable thermal loads with evenly distributed loads, MG operation cost increases by 0.6%.
24 citations
TL;DR: In this article , a novel combined cooling, heating and power (CCHP) system with dehumidification is proposed, which can provide cooling and heating, electricity and dehumidity simultaneously.
16 citations
TL;DR: In this paper, an innovative and new fuel cell-based cogeneration plant is studied, and its performance is compared with other cogenerations technologies to evaluate the potential reduction degree in energy consumption and CO2 emissions.
Abstract: Achieving European climate neutrality by 2050 requires further efforts not only from the industry and society, but also from policymakers The use of high-efficiency cogeneration facilities will help to reduce both primary energy consumption and CO2 emissions because of the increase in overall efficiency Fuel cell-based cogeneration technologies are relevant solutions to these points for small- and microscale units In this research, an innovative and new fuel cell-based cogeneration plant is studied, and its performance is compared with other cogeneration technologies to evaluate the potential reduction degree in energy consumption and CO2 emissions Four energy consumption profile datasets have been generated from real consumption data of different dwellings located in the Mediterranean coast of Spain to perform numerical simulations in different energy scenarios according to the fuel used in the cogeneration Results show that the fuel cell-based cogeneration systems reduce primary energy consumption and CO2 emissions in buildings, to a degree that depends on the heat-to-power ratio of the consumer Primary energy consumption varies from 40% to 90% of the original primary energy consumption, when hydrogen is produced from natural gas reforming process, and from 5% to 40% of the original primary energy consumption if the cogeneration is fueled with hydrogen obtained from renewable energy sources Similar reduction degrees are achieved in CO2 emissions
16 citations
TL;DR: The formalization, implementation, and validation of an innovative multi-objective optimization model for CCHP poly-generative energy systems, which uses a technical-economic optimization function based on the Net Present Value to optimize the size of the plant.
15 citations
References
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05 Jul 1995
TL;DR: C Culling is near optimal for this problem, highly noise tolerant, and the best known a~~roach in some regimes, and some new large deviation bounds on this submartingale enable us to determine the running time of the algorithm.
Abstract: We analyze the performance of a Genetic Type Algorithm we call Culling and a variety of other algorithms on a problem we refer to as ASP. Culling is near optimal for this problem, highly noise tolerant, and the best known a~~roach . . in some regimes. We show that the problem of learning the Ising perception is reducible to noisy ASP. These results provide an example of a rigorous analysis of GA’s and give insight into when and how C,A’s can beat competing methods. To analyze the genetic algorithm, we view it as a special type of submartingale. We prove some new large deviation bounds on this submartingale w~ich enable us to determine the running time of the algorithm.
4,520 citations
TL;DR: In this paper, the authors derived intrinsic rate equations for the steam reforming of methane, accompanied by water-gas shift on a Ni/MgAl2O4 catalyst, using a large number of detailed reaction mechanisms.
Abstract: Intrinsic rate equations were derived for the steam reforming of methane, accompanied by water-gas shift on a Ni/MgAl2O4 catalyst. A large number of detailed reaction mechanisms were considered. Thermodynamic analysis helped in reducing the number of possible mechanisms. Twenty one sets of three rate equations were retained and subjected to model discrimination and parameter estimation. The parameter estimates in the best model are statistically significant and thermodynamically consistent.
2,016 citations
TL;DR: A novel optimization algorithm, called Emperor Penguin Optimizer (EPO), which mimics the huddling behavior of emperor penguins, which is compared with eight state-of-the-art optimization algorithms.
Abstract: This paper proposes a novel optimization algorithm, called Emperor Penguin Optimizer (EPO), which mimics the huddling behavior of emperor penguins (Aptenodytes forsteri). The main steps of EPO are to generate the huddle boundary, compute temperature around the huddle, calculate the distance, and find the effective mover. These steps are mathematically modeled and implemented on 44 well-known benchmark test functions. It is compared with eight state-of-the-art optimization algorithms. The paper also considers for solving six real-life constrained and one unconstrained engineering design problems. The convergence and computational complexity are also analyzed to ensure the applicability of proposed algorithm. The experimental results show that the proposed algorithm is able to provide better results as compared to the other well-known metaheuristic algorithms.
508 citations
Book•
21 Oct 1992
TL;DR: A Mathematical and Historical Tour of Dynamical Systems and Graphical Analysis of the Quadratic Family, and the Role of the Critical Orbit.
Abstract: * A Mathematical and Historical Tour * Examples of Dynamical Systems * Orbits * Graphical Analysis * Fixed and Periodic Points * Bifurcations * The Quadratic Family * Transition to Chaos * Symbolic Dynamics * Chaos * Sarkovskiis Theorem * The Role of the Critical Orbit * Newtons Method * Fractals * Complex Functions * The Julia Set * The Mandelbrot Set * Further Projects and Experiments
376 citations