Supporting municipal energy transition through modelling of possible future energy scenarios: A case study of Kungälv, Sweden
Typ
Examensarbete för masterexamen
Program
Sustainable energy systems (MPSES), MSc
Publicerad
2022
Författare
Jahn, Benedikt
Nivit, Mital
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Municipalities and municipal utility companies have been found to be excellent
drivers for the energy transition that is required to meet climate goals [1, 2]. However,
municipal energy planning procedures and tools frequently do not account for
the interactions between electric distribution grids and district heating networks
[2, 3]. Storage solutions for either heat or electrical energy have been similarly
disregarded.
In this thesis, a methodology for design and evaluation of transition scenarios for
a mid-sized municipality is proposed and applied in a case study of the Swedish
municipality of Kungälv. Historical data on load profiles in both electrical and
district heating grids is analyzed and used for creation of compound load profiles,
which serve as the basis for a robust approach to generating synthetic load curves
in alternative development scenarios. A time-discrete numerical calculation model
for simulation of cost-optimal system operation on a seasonal scale is introduced.
The effects of a range of growth scenarios for local renewable electricity generation
and the district heating system on the system behaviour and associated costs are
investigated. Heat storage systems are proposed and their effect on the system is
analysed.
The results suggest that utility-scale battery storage and seasonal heat storage could
be beneficial to the system by lowering energy prices. Synergies between storage
and increased local intermittent electricity production are shown. Seasonal heat
storage is especially beneficial in scenarios with high usage of district heating, where
significant peak generation capacities can be replaced.
Beskrivning
Ämne/nyckelord
energy transition , district heating , heat storage , battery storage , intermittent renewables