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Solcellssystem med åtgärder för ökad egenanvändning av solel i fastigheter: Investeringsanalys av solcellssystem åt Rikshem AB
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
2019 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Rikshem AB is one of the leading private housing corporations in

Sweden with an annual revenue of 2.8 billion. The company own

close to 500 real estate properties with leasable area of 2.3

million square meters, mostly in larger cities from southern to

northern Sweden. Rikshem have ambitious goals aiming to minimizing

their environmental impact. Despite this, the knowledge about

photovoltaic systems and its contribution to an emission free

power production, is low within the company. Previously,

photovoltaics hasn’t been an option for investment strategies at

Rikshem, due to its high investment cost. In recent years the

price for such systems has fallen and probability is easier

reached due to many of Sweden’s economic incentives for

photovoltaic systems.

This thesis main goal was to create an investment model for

Rikshem to use when determining the probability of a photovoltaic

system. The model was to evaluate the suitability of PV-systems

for different real estate properties with different profitability

measurements, such as net present value, payback, internal rate of

interest, life cycle cost and levelized coast of energy.

Since the value of the self-consumed photovoltaic produced

kilowatt-hour is more valuable than the one exported to the grid,

a high self-consumption is important for good probability of a PVsystem.

Therefore, three actions for improving the selfconsumption

of photovoltaic electricity was considered in this

thesis: energy storage in batteries, common grid connection and a

DC-microgrid. This was evaluated through a case study of three

real-estate properties with different activities. The probability

of the different actions was determined with the investment model.

The results from the case study shows that the most profitable

action for increasing self-consumption is common grid connection,

since it necessarily doesn’t mean an extra cost for Rikshem when

implemented. Energy storage was the overall worst action, due to

the high cost and short life time. Implementation of a DCmicrogrid

generated good probability results for two of the three

properties. It can be concluded that microgrids suits buildings

differently and that the probability is mostly dependent of nearby

buildings with high electricity demands.

Place, publisher, year, edition, pages
2019. , p. 64
Series
UPTEC ES, ISSN 1650-8300 ; 19013
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-386288OAI: oai:DiVA.org:uu-386288DiVA, id: diva2:1327302
Educational program
Master Programme in Energy Systems Engineering
Supervisors
Examiners
Available from: 2019-06-20 Created: 2019-06-19 Last updated: 2019-06-20Bibliographically approved

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CiteExportLink to record
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