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Evaluation of potential fossil fuel free energy system: Scenarios for optimization of a regional integrated system
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: 0000-0002-3485-5440
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: 0000-0001-9230-1596
2017 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 142, p. 964-970Article in journal (Refereed) Published
Abstract [en]

Population growth and urbanization have led to increases in energy demand and consequently, greenhouse gas emissions. Therefore, the availability of the fossil fuel as the main source of energy supply has been changed. Utilization of renewable resources including solar, wind, and hydropower together with distributed energy systems could eliminate the dependency on fossil fuel energy sources. In this paper, energy use and supply trends have been studied for the Counties of Västmanland and Södermanland in Sweden in order to develop a scenario for the regional energy system in 2030. The aim is to use the scenario for evaluation of the impacts of regional renewable energy resources on the production planning of CHP plants. The scenario shows that there is not enough potential for electricity production from renewable resources such as solar, wind, and hydropower to fulfill the estimated demand in 2030. Around 75% of electricity needs in Västmanland and 89% of power demands in Södermanland need to be met by imported electricity to these regions. Efficiency improvements and a more complex energy system integrating also with other energy resources like biomass, waste and industrial waste heat are necessary to develop a sustainable energy system.

Place, publisher, year, edition, pages
2017. Vol. 142, p. 964-970
Keywords [en]
CHP, Renewable resources, regional energy system, Sweden, Integrated energy system.
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:mdh:diva-37274DOI: 10.1016/j.egypro.2017.12.154ISI: 000452901601020Scopus ID: 2-s2.0-85041543943OAI: oai:DiVA.org:mdh-37274DiVA, id: diva2:1158963
Conference
9th International Conference on Applied Energy, ICAE 2017; Cardiff; United Kingdom; 21 August 2017 through 24 August 2017
Available from: 2017-11-21 Created: 2017-11-21 Last updated: 2019-10-23Bibliographically approved
In thesis
1. Production planning of CHP plants integrated with bioethanol production and local renewables
Open this publication in new window or tab >>Production planning of CHP plants integrated with bioethanol production and local renewables
2019 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Production planning of an energy system is dependent on parameters such as energy demand and energy conversion technologies, which are influential in making decisions on operation strategy and optimal performance of the system. In accordance with the European Union energy policy, the share of renewable resources in the energy supply is growing. Improvement in energy technology is considered to be a pathway to achieve the target of 100% renewable power supply in Sweden by 2040. Increased utilization of renewable resources in energy systems and transportation sectors as well as improved energy conversion technologies would add complexity to the systems. Development of such complex systems depends on several key parameters, including availability of local resources, changes in daily energy use behavior, market price and weather conditions. Therefore, optimization and long-term production planning of such systems will be crucial considering the alternating nature of renewable resources.  

The aim of this thesis is to develop an optimization model for a regional energy system to provide advanced knowledge for production planning for combined heat and power (CHP) plants. The energy system in the county of Västmanland in central Sweden is used as the case for study. The regional system consists of CHP plants, heat only boilers and renewable resources. Two different optimization cases are developed for the analysis, one with increased energy supply from local renewables, and the other with integrated transport fuels production in a polygeneration system. The model includes the whole chain from availability of resources to the final energy use. 

The effect of different parameters relating to trends in energy demand and supply on operational strategy of the studied system is investigated by developing different scenarios. The potential solar power production from grid-connected solar cells installed on the rooftops of buildings in the region is added to the system in the base scenario. Then, the first scenario analyzes the increased application of heat pumps to replace the district heating in some of the buildings in the region. The influence of electrification of the transportation system as a result of increased penetration of electric vehicles is investigated in the second scenario. Two further scenarios evaluate the effects of integration of bioethanol production with existing CHP plants and increased application of bioethanol cars and hybrid vehicles in the regional transportation system. 

The study demonstrates the importance of production planning of the energy system at the regional scale in relation to resource availability and energy imports. The main conclusion of this thesis is that the polygeneration and increased use of heat pumps could influence the production planning of the system in terms of fuel use, plants operation, fossil-based emissions, and energy demand and import. However, increased use of hybrid vehicles represents the optimal case for the mentioned parameters.

Place, publisher, year, edition, pages
Västerås: Mälardalen University, 2019
Series
Mälardalen University Press Licentiate Theses, ISSN 1651-9256 ; 285
Keywords
CHP, Energy systems, Optimization, Polygeneration, Production planning, Renewable resources
National Category
Energy Engineering Energy Systems
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-45801 (URN)978-91-7485-445-9 (ISBN)
Presentation
2019-12-16, Beta, Mälardalen University, Västerås, 09:15 (English)
Opponent
Supervisors
Projects
SYDPOL-System Development for Power Plant Production Planning and Optimal Operations
Available from: 2019-10-23 Created: 2019-10-23 Last updated: 2019-11-14Bibliographically approved

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Daraei, MahsaThorin, EvaAvelin, AndersDotzauer, Erik

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