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Solenergi och värmelagring i kvarteret Lagern
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2013 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Solar Energy and Heat Storage in the quarter Lagern (English)
Abstract [en]

Humanity stands before a huge challenge to lower its emissions of carbon dioxide and its use of energy at the same time as the global population is rising and the developing countries are being industrialized. A lot of newly built buildings are due to this challenge, designed to be more energy efficient but also use renewable energy resources instead of pollutant fossil fuels .Solar energy is one of the purest forms of energy that exists in abundant amounts, which is why it is most likely that it could come to play a major part in the future energy market.

 

The main purpose of this report is to investigate the possibility to implement a sustainable energy system with solar thermal heat and  heat storage as main sources of energy in the neighborhood “kvarteret Lagern”, which is the area where the old football stadium “Rasunda Stadion” was located. New developments within different heat storage techniques have opened up new approaches to enable buildings an all year round heat supply from solar energy. This report will focus on heat storage in boreholes.

 

At the present here is only a preliminary plan of how the neighborhood is supposed to be designed. This plan has been used in all the calculations regarding the potential areas where solar collectors and a heat Storage system could be integrated. The solar collector area has been maximized according to these conditions to be able to maximize the use of solar energy in “kvarteret Lagern”. The results show that the energy from the solar collectors would supply the total demand of heat energy during May to September, where the potential heat excess would be stored in the boreholes to be extracted and used during the winter.

 

The heat storage system that has been designed for “kvarteret Lagern” consists of 36 boreholes. The borehole system has the potential to store 977 MWh per year where the heat losses are estimated to be around 44 percent. The heat excess that would be stored during the summers will enable 611 MWh of heat to be extracted and used from the boreholes during the winter. The result of the economic calculations and the sensitivity analysis show that an implementation of this type of energy system in “kvarteret Lagern”, would lead to positive net present values and therefore be a profitable investment. They also show that the payback time is significantly shorter than the lifetime period of the solar collectors.    

Abstract [sv]

En stor utmaning som människan står inför är att minska utsläppen av koldioxid och minska energianvändningen, samtidigt som jordens befolkning ökar och utvecklingsländer  industrialiseras. Många nybyggnationer som sker idag är därfor anpassade till att vara mer energieffektiva samt utnyttja förnybara energikällor. En av de renaste formerna av energi är solenergi som ar en outtomlig resurs och således en av de främsta energikällorna som antagligen kommer spela en mycket stor roll i framtidens energimarknad.

 

Rapportens huvudsakliga syfte ar att integrera ett hållbart energisystem med solvärme och säsongsvärmelagring som energikalla i det ännu  ej byggda kvarteret Lagern, vilket kommer ligga i området där gamla Råsunda stadion låg. Utvecklingen av olika värmelagringstekniker har öppnat nya  vägar for storskalig uppvarmning året om av byggnader med solvärme. Energilagring i borrhalsystem är den teknik som  rapporten kommer att utreda.                                                              

 

Det finns i dagens läge endast en preliminär detaljplan över hur kvarteret Lagern kan komma att utformas. Denna detaljplan har använts som underlag for att dimensionera hur stor solfångararea som kan integreras i omradet. En maximering av solfångararea har beräknats utifran dessa förutsättningar for att maximera användningen av solenergi i området. Resultatet visar att den energi som produceras av solfångararean täcker det hela värmeenergibehovet under maj till september. Under dessa månader produceras även överskottsvärme som kan lagras for att anvandas under vinterhalvåret. 

 

Ett borrhålslagersystem har tagits fram som består av 36 borrhål. Detta system har en uppskattad lagringskapacitet pa 977 MWh per år där förvöntade värmeförlusterna beräknas ligga runt 44 procent.Lagring av värmeöverskottet som produceras under sommaren möjliggör därfor  att 611 MWh  solenergi kan utvinnas fran borrhålslagret under vinterhalvåret.

 

Resultatet for de ekonomiska kalkylerna visar att en implementering av ett solvärme och borrhålsvärmelagringssystem i kvarteret Lagern ar en lönsam investering som kommer att återbetala sig långt innan solfångarnas livslängd har passerat.

Place, publisher, year, edition, pages
2013.
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-123821OAI: oai:DiVA.org:kth-123821DiVA: diva2:631110
Subject / course
Energy Technology
Educational program
Master of Science in Engineering - Industrial Engineering and Management
Supervisors
Examiners
Available from: 2013-06-24 Created: 2013-06-19 Last updated: 2013-06-24Bibliographically approved

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