Co-Design Optimization of a Combined Heat and Power Hybrid Energy System

2021 ◽  
Author(s):  
Dongze Li ◽  
Jiaxin Wu ◽  
Jie Zhang ◽  
Pingfeng Wang
Keyword(s):  
Design Optimization ◽  
Storage System ◽  
Energy Systems ◽  
Combined Heat And Power ◽  
Mixed Integer ◽  
Production Operation ◽  
Efficient Technology ◽  
Hybrid Energy ◽  
Hybrid Energy Systems ◽  
Component Design

Abstract As an energy efficient technology that generates electricity and captures the heat that would otherwise be wasted to provide useful thermal energy, combined heat and power (CHP) hybrid energy systems have been widely used in the U.S. In the presented study, a two-stage co-design optimization model for CHP-based hybrid energy systems is developed. By applying a mixed integer programming (MIP) method, the optimization is performed from the operational and design perspectives. Six components: CHP, boiler, heat recover unit (HRU), thermal storage system (TS), power storage system (ES), and photovoltaic (PV) are considered in the CHP-based microgrids. During the optimization process, the cost-based optimal component design solutions are firstly obtained by minimizing the total installation costs of the components. The optimal operational strategy is further attained based on the component design by minimizing the costs from production, operation and maintenance, startup, and unsatisfied load. In the end, non-disruptive and disruptive scenarios are considered in the case study to testify to the model’s effectiveness in co-design and reliability improvement.

scholarly journals Techno-Economic Evaluation of Interconnected Nuclear-Renewable Micro Hybrid Energy Systems with Combined Heat and Power

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1642 ◽  
Author(s):  
Hossam A. Gabbar ◽  
Muhammad R. Abdussami ◽  
Md. Ibrahim Adham
Keyword(s):  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Ghg Emissions ◽  
Energy Systems ◽  
Energy System ◽  
Combined Heat And Power ◽  
Small Scale ◽  
Hybrid Energy ◽  
Hybrid Energy Systems ◽  
The Impact

Renewable energy sources (RESs) play an indispensable role in sustainable advancement by reducing greenhouse gas (GHG) emissions. Nevertheless, due to the shortcomings of RESs, an energy mix with RESs is required to support the baseload and to avoid the effects of RES variability. Fossil fuel-based thermal generators (FFTGs), like diesel generators, have been used with RESs to support the baseload. However, using FFTGs with RESs is not a good option to reduce GHG emissions. Hence, the small-scale nuclear power plant (NPPs), such as the micro-modular reactor (MMR), have become a modern alternative to FFTGs. In this paper, the authors have investigated five different hybrid energy systems (HES) with combined heat and power (CHP), named ‘conventional small-scale fossil fuel-based thermal energy system,’ ‘small-scale stand-alone RESs-based energy system,’ ‘conventional small-scale fossil fuel-based thermal and RESs-based HES,’ ‘small-scale stand-alone nuclear energy system,’ and ‘nuclear-renewable micro hybrid energy system (N-R MHES),’ respectively, in terms of net present cost (NPC), cost of energy (COE), and GHG emissions. A sensitivity analysis was also conducted to identify the impact of the different variables on the systems. The results reveal that the N-R MHES could be the most suitable scheme for decarbonization and sustainable energy solutions.

Exergy Analysis for Small Modular Reactor Hybrid Energy System

2015 ◽  
Author(s):  
Lauren Boldon ◽  
Piyush Sabharwall ◽  
Li (Emily) Liu
Keyword(s):  
Physical Environment ◽  
Exergy Analysis ◽  
Raw Materials ◽  
Storage System ◽  
Industrial Process ◽  
Energy Systems ◽  
Energy System ◽  
Actual System ◽  
Hybrid Energy ◽  
Hybrid Energy Systems

Nuclear hybrid energy systems (NHES) with the capability to store energy will advance the development of renewable energy technologies by providing reliable, non-carbon emitting, and integrated base-load nuclear energy. Small modular reactors (SMRs) will be significant in establishing hybrid energy systems because of their inherent financial advantages over larger commercial reactors; flexible deployment and faster onsite assembly; and ability to closely match required energy needs for industrial process heat applications. An SMR is a thermal energy plant comprised of many complex systems that interact with each other and their surroundings. To study such a system and set appropriate prices for outputs, it is important to assess thermoeconomics or the effective utility and costs of all resources. At its core, thermoeconomics is based upon the quality of energy, or exergy, flowing into and out of each component within a system. Limited research into the thermoeconomics behind SMRs has been performed, leaving an important gap in understanding. This article presents relevant exergetic cost theory and details methods behind an exergy analysis for an SMR-wind-storage system. To perform this analysis, both the physical and economic environments are identified to provide information on how overall system efficiencies and costs may be analyzed. The physical environment incorporates the actual system components, necessary raw materials, and the surroundings or reference environment. The economic environment refers to the upfront installation and operational costs in addition to market prices. In a purely thermodynamic exergy analysis, the exergetic cost may be determined from the physical environment alone and describes the necessary exergy for production to occur. To improve or optimize a system, system efficiency must be balanced with economics to make NHES more competitive and further their development.

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.

scholarly journals Modeling, Control, and Optimization of Multi-Generation and Hybrid Energy Systems

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1125
Author(s):  
Kody M. Powell ◽  
Kasra Mohammadi
Keyword(s):  
Renewable Energy ◽  
Energy Systems ◽  
Hybrid Energy ◽  
Renewable Energy Technologies ◽  
Energy Technologies ◽  
Hybrid Energy Systems ◽  
Increasing Trend

As renewable energy technologies decrease in cost and become more prevalent, there is an increasing trend towards electrification of many energy systems [...]

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