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Optimization of a regional energy system including CHP plants and local PV system and hydropower: Scenarios for the County of Västmanland in Sweden
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0001-7576-760x
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0001-8191-4901
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0002-3485-5440
2019 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 230, p. 1111-1127Article in journal (Refereed) Published
Abstract [en]

Providing the energy needs of the cumulatively increasing population has become a challenge for the regional energy systems in the world. The most critical challenge is to supply enough energy in the forms of heat and power during the cold and warm periods of the year with the lowest production cost and minimum environmental impacts. A solution is to increase the green energy supply from renewable energy resources such as solar, wind power, and hydropower. In order to apply this solution in the real energy system, potentials for clean energy supply in an optimized manner should be evaluated. In this study, an optimization model is developed for a regional energy system in the central part of Sweden. The studied system consists of Combined Heat and Power (CHP)plants and heat water boilers together with renewable energy supply from rooftop Photo Voltaic (PV)- solar collectors and regional hydropower plants. The General Algebraic Modeling System (GAMS)is used to create the model based on the Mixed Integer Linear Programming (MILP)method. The goal is to evaluate the influence of local renewable energy systems on the production planning of CHP plants in a region. Two different scenarios are investigated based on the extremes in energy supply and demand concerning the increased use of Electrical Vehicles (EVs)and more application of Heat Pumps (HPs)in the system. The results show that installation of rooftop PV systems has the potential to reduce the electricity import to the region; however, it will at the same time reduce the operation time of the CHP plans during the summer period. With increased use of HPs for heating, the shut off time for CHP plants is further increased. Increase in electric passenger cars penetration in the system has no impacts on the production profiles of the plants. The regional electricity demand grows significantly by more utilization of EVs and increased application of heat pumps in the studied system. The high electricity demand will mainly be satisfied by importing electricity from outside the region together with low production from CHP plants and the power generated by the rooftop PV systems and regional hydropower. The developed optimization model with studied scenarios can be applied to other energy systems to increase the knowledge of production planning and feasibility of a fossil fuel free energy system.

Place, publisher, year, edition, pages
Elsevier Ltd , 2019. Vol. 230, p. 1111-1127
Keywords [en]
Electrical vehicle, Heat pump, Optimization, Production planning, Renewable energy resource, Algebra, Cogeneration plants, Economics, Electric power utilization, Energy policy, Environmental impact, Fossil fuels, Free energy, Heat pump systems, Hydroelectric power, Hydroelectric power plants, Integer programming, Planning, Power generation, Production control, Pumps, Renewable energy resources, Wind power, Clean energy supplies, Combined heat and power, Electrical vehicles, Heat pumps, Mixed-integer linear programming, Optimization modeling, Regional energy systems, Electric power system interconnection
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-43876DOI: 10.1016/j.jclepro.2019.05.086Scopus ID: 2-s2.0-85065879762OAI: oai:DiVA.org:mdh-43876DiVA, id: diva2:1323097
Available from: 2019-06-11 Created: 2019-06-11 Last updated: 2019-06-11Bibliographically approved

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Daraei, MahsaAvelin, AndersThorin, Eva

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