Simulation und Optimierung kombiniert/A simulation-based framework for operational optimization of industrial energy systems

2020 ◽  
Vol 110 (01-02) ◽  
pp. 12-17
Author(s):  
Niklas Panten ◽  
Heiko Ranzau ◽  
Thomas Kohne ◽  
Daniel Moog ◽  
Eberhard Abele ◽  
...  
Keyword(s):  
Synthetic Data ◽  
Cost Savings ◽  
Energy Systems ◽  
Decisive Role ◽  
Optimization Methods ◽  
Energy System ◽  
Significant Cost ◽  
Operational Optimization ◽  
Simulation Based ◽  
Industrial Energy

Die optimierte Betriebsweise von industriellen Energiesystemen ist eine Schlüsseltechnologie, um signifikante Kosteneinsparpotenziale durch Steigerung der Energieeffizienz und -flexibilität zu heben. Weil dabei eine Vielzahl dynamischer und stochastischer Einflüsse berücksichtigt werden müssen, spielt die Simulation des Energiesystems eine entscheidende Rolle. Zur Evaluierung unterschiedlicher Betriebsoptimierungsverfahren wird ein simulationsgestütztes Framework vorgestellt, welches bei KI (Künstliche Intelligenz)-Algorithmen unter anderem für das Anlernen mit synthetischen Daten verwendet werden kann.   The optimized operation of industrial energy systems is a key technology to unlock significant cost savings by increasing energy efficiency and flexibility. Since a variety of dynamic and stochastic influences must be considered, the simulation of the energy system plays a decisive role. A simulation-based framework is presented for evaluating various operational optimization methods, which can also be used for learning based on synthetic data with AI (artificial intelligence) algorithms.

scholarly journals Validating Simulation Result of Solar Hybrid System for Domestic Consumers using HOMER Software

2019 ◽  
Vol 8 (11) ◽  
pp. 1428-1431
Keyword(s):  
Fossil Fuel ◽  
Energy Systems ◽  
Energy System ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Hybrid Energy ◽  
Renewable Power ◽  
Viable Solution ◽  
Simulation Based ◽  
Optimum Utilization

Consumption of fossil fuel and its effect on the environment has become a major universal problem. It is therefore necessary to use renewable energy resources (RES) such as solar, wind, etc. to decrease dependency on conventional energy resources. Currently, solar rooftop PV hybrid energy systems are becoming popular to overcome with the disadvantages of conventional energy sources. This paper presents a simulation-based strategy with the help of HOMER software to control the optimum utilization of renewable hybrid energy system for private buildings where it helps to maximize the building’s renewable power ratio and minimizing complete net current costs and CO2 emissions so that it’s a viable solution to address to the power shortage and Greenhouse gas emissions. Finally, manual calculations measured with net-meter are being validated with HOMER software and the results are more accurate with a variation of 1%

scholarly journals Integration of Hydrogen into Multi-Energy Systems Optimisation

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1606
Author(s):  
Peng Fu ◽  
Danny Pudjianto ◽  
Xi Zhang ◽  
Goran Strbac
Keyword(s):  
Hydrogen Production ◽  
Carbon Capture ◽  
Low Cost ◽  
Carbon Capture And Storage ◽  
Cost Savings ◽  
Energy Systems ◽  
Energy System ◽  
Total Power ◽  
Carbon Target ◽  
Production Processes

Hydrogen presents an attractive option to decarbonise the present energy system. Hydrogen can extend the usage of the existing gas infrastructure with low-cost energy storability and flexibility. Excess electricity generated by renewables can be converted into hydrogen. In this paper, a novel multi-energy systems optimisation model was proposed to maximise investment and operating synergy in the electricity, heating, and transport sectors, considering the integration of a hydrogen system to minimise the overall costs. The model considers two hydrogen production processes: (i) gas-to-gas (G2G) with carbon capture and storage (CCS), and (ii) power-to-gas (P2G). The proposed model was applied in a future Great Britain (GB) system. Through a comparison with the system without hydrogen, the results showed that the G2G process could reduce £3.9 bn/year, and that the P2G process could bring £2.1 bn/year in cost-savings under a 30 Mt carbon target. The results also demonstrate the system implications of the two hydrogen production processes on the investment and operation of other energy sectors. The G2G process can reduce the total power generation capacity from 71 GW to 53 GW, and the P2G process can promote the integration of wind power from 83 GW to 130 GW under a 30 Mt carbon target. The results also demonstrate the changes in the heating strategies driven by the different hydrogen production processes.

Optimization Models and Methods Developed at the Energy Systems Institute

2013 ◽  
Vol 2 (4) ◽  
pp. 1-15 ◽  
Author(s):  
N.I. Voropai ◽  
V.I. Zorkaltsev
Keyword(s):  
Lagrange Function ◽  
Flow Distribution ◽  
Energy Systems ◽  
Optimization Methods ◽  
Energy System ◽  
General Idea ◽  
Optimization Models ◽  
Hydraulic Systems ◽  
Reduced Gradient Method ◽  
Reduced Gradient

The paper presents shortly some optimization models of energy system operation and expansion that have been created at the Energy Systems Institute of the Siberian Branch of the Russian Academy of Sciences. Consideration is given to the optimization models of energy development in Russia, a software package intended for analysis of power system reliability, and model of flow distribution in hydraulic systems. A general idea of the optimization methods developed at the Energy Systems Institute is given including the reduced gradient method, interior point algorithms, method of modified Lagrange function, and cutting-plane algorithms.

scholarly journals Optimal Design Model of the Energy Systems in Iron and Steel Enterprises

2019 ◽  
Vol 9 (22) ◽  
pp. 4778 ◽  
Author(s):  
Zhengbiao Hu ◽  
Dongfeng He ◽  
Kai Feng ◽  
Pingze Liu ◽  
Yongwei Jia
Keyword(s):  
Energy Source ◽  
Energy Conversion ◽  
Optimization Design ◽  
Design Method ◽  
Energy Systems ◽  
Optimization Methods ◽  
Energy System ◽  
Economic Benefits ◽  
Steel Plant ◽  
Energy Sources

In steel enterprises, the design of energy systems mainly depends on experience and lacks systematic optimization methods. Therefore, it is of great significance to propose an overall optimization design method for the energy system of steel enterprises. In this paper, a linear model is proposed to select the energy conversion equipment types and distribute energy sources with the aim of maximizing the economic benefits of an energy system. In the model, the choice of energy conversion technology and the distribution of energy source are considered comprehensively. For the S steel plant, the case analysis results show that under the condition of keeping the original energy conversion equipment unchanged and optimizing the distribution of energy source, the economic benefits of the energy system can be increased by 15.77 CNY/t steel, and under the conditions of optimizing the distribution schemes of the energy conversion equipment types and energy sources, the economic benefits of the energy system can be increased by 180.26 CNY/t steel. In addition, the effects of different energy conversion equipment configurations, different energy sources prices and different pollution cost standards on the steel plant energy economic benefits were analyzed.

scholarly journals Review on Coordinated Planning of Source-Network-Load-Storage for Integrated Energy Systems

2021 ◽  
Vol 9 ◽  
Author(s):  
Hong Fan ◽  
Zichun Yu ◽  
Shiwei Xia ◽  
Xuan Li
Keyword(s):  
Collaborative Planning ◽  
Energy Systems ◽  
Energy Coupling ◽  
Optimization Methods ◽  
Energy System ◽  
Research Direction ◽  
Development Trend ◽  
Future Research ◽  
Environmental Benefit ◽  
Network Load

The integration of electricity, gas, and heat (cold) in the integrated energy system (IES) breaks the limitation of every single energy source, which is the development trend of future energy systems. To realize the coordinated planning of “source-network-load-storage,” the IES has to be conducive to improving energy efficiency, bringing economic and environmental benefit, and achieving sustainable development of energy. In this paper, the techniques and methods involved in IES planning are summarized. First, the structure and characteristics of the IES are briefly introduced. Second, the key findings of the IES planning are summarized from four perspectives: source, network, load, and storage. Then, the modeling methods of the IES collaborative planning are summarized, and the optimization methods for solving complex planning problems are analyzed. Compared with previous reviews, this paper focuses on the modeling of multi-energy coupling of each part of source-network-load-storage and modeling of the overall collaborative planning. Finally, the future research direction of IES planning is forecast.

scholarly journals Operational optimization of a building-level integrated energy system considering additional potential benefits of energy storage

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Sai Liu ◽  
Cheng Zhou ◽  
Haomin Guo ◽  
Qingxin Shi ◽  
Tiancheng E. Song ◽  
...  
Keyword(s):  
Energy Storage ◽  
Operating Cost ◽  
Economic Cost ◽  
Energy System ◽  
Peak Shaving ◽  
Operational Optimization ◽  
Integrated Energy System ◽  
Potential Benefits ◽  
The Times ◽  
Building Level

AbstractAs a key component of an integrated energy system (IES), energy storage can effectively alleviate the problem of the times between energy production and consumption. Exploiting the benefits of energy storage can improve the competitiveness of multi-energy systems. This paper proposes a method for day-ahead operation optimization of a building-level integrated energy system (BIES) considering additional potential benefits of energy storage. Based on the characteristics of peak-shaving and valley-filling of energy storage, and further consideration of the changes in the system’s load and real-time electricity price, a model of additional potential benefits of energy storage is developed. Aiming at the lowest total operating cost, a bi-level optimal operational model for day-ahead operation of BIES is developed. A case analysis of different dispatch strategies verifies that the addition of the proposed battery scheduling strategy improves economic operation. The results demonstrate that the model can exploit energy storage’s potential, further optimize the power output of BIES and reduce the economic cost.

scholarly journals Dynamic Modelling of LNG Powered Combined Energy Systems in Port Areas

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3640
Author(s):  
Davide Borelli ◽  
Francesco Devia ◽  
Corrado Schenone ◽  
Federico Silenzi ◽  
Luca A. Tagliafico
Keyword(s):  
Energy Savings ◽  
Ghg Emissions ◽  
Dynamic Modelling ◽  
Energy Systems ◽  
Energy System ◽  
Primary Energy ◽  
Time Behavior ◽  
Vapor Compression Refrigeration Cycle ◽  
Integrated Energy System ◽  
Energy Share

Liquefied Natural Gas (LNG) is a crucial resource to reduce the environmental impact of fossil-fueled vehicles, especially with regards to maritime transport, where LNG is increasingly used for ship bunkering. The present paper gives insights on how the installation of LNG tanks inside harbors can be capitalized to increase the energy efficiency of port cities and reduce GHG emissions. To this purpose, a novel integrated energy system is introduced. The Boil Off Gas (BOG) from LNG tanks is exploited in a combined plant, where heat and power are produced by a regenerated gas turbine cycle; at the same time, cold exergy from LNG regasification contributes to an increase in the efficiency of a vapor compression refrigeration cycle. In the paper, the integrated energy system is simulated by means of dynamic modeling under daily variable working conditions. Results confirm that the model is stable and able to determine the time behavior of the integrated plant. Energy saving is evaluated, and daily trends of key thermophysical parameters are reported and discussed. The analysis of thermal recovering from the flue gases shows that it is possible to recover a large energy share from the turbine exhausts. Hence, the system can generate electricity for port cold ironing and, through a secondary brine loop, cold exergy for a refrigeration plant. Overall, the proposed solution allows primary energy savings up to 22% when compared with equivalent standard technologies with the same final user needs. The exploitation of an LNG regasification process through smart integration of energy systems and implementation of efficient energy grids can contribute to greener energy management in harbors.

scholarly journals Accessibility and Sustainability of Hybrid Energy Systems for a Cement Factory in Oman

2020 ◽  
Vol 13 (1) ◽  
pp. 93
Author(s):  
Wesam H. Beitelmal ◽  
Paul C. Okonkwo ◽  
Fadhil Al Housni ◽  
Wael Alruqi ◽  
Omar Alruwaythi
Keyword(s):  
Functional Limitations ◽  
Energy Systems ◽  
Energy System ◽  
Electricity Production ◽  
Diesel Generator ◽  
Hybrid Energy ◽  
Electric System ◽  
Cement Factory ◽  
Hybrid Energy Systems ◽  
Cost Of Energy

Diesel generators are being used as a source of electricity in different parts of the world. Because of the significant expense in diesels cost and the requirement for a greener domain, such electric generating systems appear not to be efficient and environmentally friendly and should be tended to. This paper explores the attainability of utilizing a sustainable power source based on a cross-breed electric system in the cement factory in Salalah, Oman. The HOMER software that breaks down the system setup was utilized to examine the application and functional limitations of each hybridized plan. The result showed that a renewable-energy (RE)-based system has a lower cost of energy (COE) and net present cost (NPC) compared to diesel generator-based hybrid electric and standalone systems. Although the two pure renewable hybrid energy systems considered in this study displayed evidence of no emissions, lower NPC and COE values are observed in the photovoltaic/battery (PV/B) hybrid energy system compared with photovoltaic/wind turbine/battery (PV/WT/B). The PV/WT/B and PV/B systems have higher electricity production and low NPC and COE values. Moreover, the PV/B has the highest return on investment (ROI) and internal rate of return (IRR), making the system the most economically viable and adjudged to be a better candidate for rural community electrification demands.

Gamma-Irradiated Cornea in Combat-related Ocular Trauma

2020 ◽  
Author(s):  
Brian M Davis ◽  
Carson Clabeaux ◽  
Anton Vlasov ◽  
Paul Houghtaling
Keyword(s):  
Ocular Trauma ◽  
Cost Savings ◽  
Corneal Tissue ◽  
Significant Cost ◽  
Visual Rehabilitation ◽  
Military Health ◽  
Corneal Injury ◽  
Gamma Irradiated ◽  
The Military ◽  
Penetrating Ocular Trauma

ABSTRACT Corneal injury is a known risk for deployed troops worldwide. To the authors’ knowledge, there has been no reported use of gamma-irradiated corneas in the setting of severe corneal trauma. Our report highlights the case of a 36-year-old active duty solider who sustained bilateral penetrating ocular trauma from a nearby ordnance explosion. We propose that ocular surgeons should consider utilizing gamma-irradiated corneas in (1) a situation where the corneal tissue is so damaged that it would be challenging to accomplish an adequate repair while providing the opportunity for future visual rehabilitation and (2) remote and/or deployed environments where storage of fresh donor tissue is limited. The long shelf life of gamma-irradiated corneas reduces the need for specialized storage equipment and the need for continuous resupply, both potentially leading to significant cost savings for the Military Health System.

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