mdh.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Economic and energy analysis of three solar assisted heat pump systems in near zero energy buildings
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0002-8287-8735
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0002-8604-9299
2013 (English)In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 66, 77-87 p.Article in journal (Refereed) Published
Abstract [en]

The European Union's directive of the energy performance of buildings makes energy systems with local energy generation interesting. To support local energy generation the government has appointed a commission to investigate the possibility to implement net metering for grid connected PV-systems. In this paper three different systems are simulated and analyzed with regards to economics and energy: a PV-system and a heat pump (alternative 1), a heat pump and a solar thermal system (alternative 2) and a heat pump, a PV-system and a solar thermal system (alternative 3). System alternative 1 is profitable with daily net metering and monthly net metering and unprofitable with instantaneous net metering. The solar electrical fraction of the system is 21.5%, 43.5% and 50%, respectively. System alternative 2 is unprofitable and has a solar electricity fraction of 5.7%. System alternative 3 is unprofitable and has a solar electricity fraction of just below 50. The conclusion is that a PV system in combination with a heat pump is a superior alternative to a solar thermal system in combination with a heat pump.

Place, publisher, year, edition, pages
2013. Vol. 66, 77-87 p.
Keyword [en]
Energy system simulation, Ground source heat pump, Near zero energy building, Photovoltaics, Solar collector
National Category
Social Sciences
Identifiers
URN: urn:nbn:se:mdh:diva-21197DOI: 10.1016/j.enbuild.2013.07.042ISI: 000327904200009Scopus ID: 2-s2.0-84881521779OAI: oai:DiVA.org:mdh-21197DiVA: diva2:644063
Available from: 2013-08-29 Created: 2013-08-29 Last updated: 2016-03-18Bibliographically approved
In thesis
1. Low energy buildings equipped with heat pumps for high self-consumption of photovoltaic electricity
Open this publication in new window or tab >>Low energy buildings equipped with heat pumps for high self-consumption of photovoltaic electricity
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The building sector is a prioritized area in the European Unions (EU) ambition to reduce the total final energy use by 20 %; lower the emission of greenhouse gases by 20 % and using energy 20 % more efficient by 2020. The residential sector in the European Union accounts for 27% of the un-ion’s final energy use and the EU views decentralized energy generation and heat pumps as important measures in reducing the energy demand in the building sector.

In recent years a rapid decrease in photovoltaic system prices has led to a growing popularity in Sweden. This fact in combination with a large in-crease of heat pump systems in residential buildings the last decade makes a combination of heat pumps and solar energy systems an interesting sys-tem configuration to analyze. In addition, the electricity price structure in Sweden and the uncertainty of the sustainability of the Swedish solar energy support schemes makes the topic of self-consumption an important research area.

Different solar energy systems for residential buildings and two different storage technologies, batteries and hot water storage tanks, have been analyzed with regards to profitability, solar energy fraction and self-consumption levels.

The results suggest that the system with a heat pump in combination with a photovoltaic system can be profitable and have high solar energy fractions and high levels of self-consumption and that the systems with storage are not profitable but give high levels of self-consumption and relatively high solar energy fractions. The hot water storage gives almost as high level of self-consumption as batteries but have half of the batteries levelized cost of electricity.

A system with a ground source heat pump and a solar thermal system are ineffective, unprofitable and give low solar energy fractions.

A system with a weather forecast controller gives a small increase in self-consumption and is unprofitable.

The proposed near energy zero building definition proposed by the Swedish National Board of Housing, Building and Planning in 2015 is unclear in terms of what electrical load the PV electricity reduces in the building. This has a fairly large impact on the building specific energy demand.

Place, publisher, year, edition, pages
Västerås: Mälardalen University, 2016. 59 p.
Series
Mälardalen University Press Dissertations, ISSN 1651-4238 ; 200
National Category
Energy Engineering
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-31314 (URN)978-91-7485-255-4 (ISBN)
Public defence
2016-04-29, Delta, Mälardalens högskola, Västerås, 09:15 (English)
Opponent
Supervisors
Available from: 2016-03-18 Created: 2016-03-18 Last updated: 2016-04-04Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Thygesen, RichardKarlsson, Björn
By organisation
Future Energy Center
In the same journal
Energy and Buildings
Social Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 224 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf