Photovoltaics, Status of

Jäger-Waldau, Arnulf

doi:10.1007/978-1-4614-5806-7_459

Cited by 81 publications

(101 citation statements)

References 30 publications

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“…As the total annualized costs of an office building equipped with LEDs and distributed generation have been studied before [19], [20] and the costs of the PV [27] [28], and LED [29] technologies are decreasing rapidly, it was decided to concentrate only on energy costs rather than on the total system costs in this thesis [V].…”

Section: Aim Of the Research And Methodsmentioning

confidence: 99%

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Viitanen

Halonen

2014

Journal of Renewable and Sustainable Energy

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Ene rgy e ffic ie nt l igh t ing syst e ms in buil dings w it h int e grat e d ph o t o vo l t aic s J a nne V i i t a ne n D O C T O R A L D I S S E R T A T I O N SAalto University publication series DOCTORAL DISSERTATIONS 18/2015 Energy efficient lighting systems in buildings with integrated photovoltaics Janne Viitanen A doctoral dissertation completed for the degree of Doctor of Science (Technology) to be defended, with the permission of the Aalto University School of Electrical Engineering, at a public examination held at the lecture hall S1 of the school on 6 March 2015 at 12. Aalto University School of Electrical Engineering Department of Electrical Engineering and Automation Lighting Unit AbstractThe goal of this thesis was to study how a building integrated photovoltaic system, choice of lighting technology and the selected system voltage affect the energy efficiency of an office building. The quality of the lighting was considered also, as it is essential that users accept the lighting.The energy production of photovoltaic system (PV) was evaluated in Southern Finland through onsite PV measurements from several different compass points and tilt angles during 2010-2013. Based on the measurements, the PV system was sized to provide energy for lighting and office appliances. The energy efficiency of the devices had considerable effect on the sizing of the PV system. The seasonal variations in the PV production were considerable, as only few per cent of the summer time insolation was available during the winter.The energy efficiency and quality of lighting was studied. Fluorescent lighting (FL) and LED lighting were compared, as they are the most used options in offices today. Lighting measurements and a user study was conducted. Different illuminance levels and correlated colour temperatures (CCT) were studied. The studied parameters included glare, reading task performance, identification of detail, colour naturalness and pleasantness, illuminance level sufficiency and pleasantness, pleasantness of the lighting in general and naturalness of the shadows. The subjects also set their own preferred illuminance levels and CCTs. No major differences were found in the subjective preferences at equal illuminance levels between luminaire types. On average, an illuminance level around 600 lx and a CCT around 4000 K were preferred. LEDs were found more energy efficient than FLs and the difference increased when the luminaires were dimmed.In the last part of the research the electricity consumption of an office building was compared with system voltages 12 VDC, 24 VDC, 48 VDC and 230 VAC through computer simulations in a Matlab-Simulink environment. It was found that 230 VAC was the most energy efficient option as a general system voltage, with the selected components and system variables. The 24 VDC was the most energy efficient option with fluorescent lighting and the 48 VDC with LED lighting, if only the lighting system was considered. Aurinkosähkön tuotantoa Etelä-Suomessa tutkittiin mittausten avulla eri il...

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Section: Aim Of the Research And Methodsmentioning

confidence: 99%

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Viitanen

Halonen

2014

Journal of Renewable and Sustainable Energy

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“…This is due to different energy policies and public support programs for renewable energies and especially photovoltaics, as well as the varying grades of liberalization of domestic electricity markets [20]. After a 20-fold increase of solar photovoltaic electricity generation capacity between 2001 and 2011, the capacity of newly installed PV systems decreased continuously from the peak in 2011 with almost 19 GW of new installations to about 5.8 GW in 2016.…”

Section: Uncertainties In Market Statisticsmentioning

confidence: 99%

Snapshot of Photovoltaics—March 2017

Jäger-Waldau

2017

Sustainability

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Renewable energy use, especially from solar photovoltaic electricity generation, is growing at a much faster pace than the rest of the economy world-wide. The significant cost reduction of solar PV over the last decade and the zero-fuel cost volatility have increased solar PV's attractiveness. In 2016, the newly installed solar PV power of about 75 GW was more than all the world-wide installed capacity until the end of 2011. The fact that the Paris Agreement went into force on 4 November 2016 will be another accelerating factor for the use of electricity from renewable energy sources. Apart from the electricity sector, renewable energy sources for the generation of heat and environmental friendly synthetic-fuels for the transport sector will become more and more important in the future.

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“…Additionally, buildings should be able to contribute to a significant extent with the production of renewable energies, in order to achieve another EU target: "nearly zero-energy" buildings (Directive 2010/31/EU, 2010. The effect of these measures is supported by the fact that nearly two-thirds of the world's new solar panels were installed in Europe in 2011 (Jager-Waldau, 2012). In a broader spectrum than limiting the environmental concerns to technical solutions, it is the entire concept of the building that should be revised and improved, in order to meet the targets set by the EU.…”

Section: Introductionmentioning

confidence: 99%

Assessment of building operational energy at early stages of design – A monthly quasi-steady-state approach

Santos

Martins

Gervásio

et al. 2014

Energy and Buildings

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Please cite this article as: P. Santos, R. Martins, H. Gervásio, L.S. Silva, Assessment of building operational energy at early stages of design ndash a monthly quasi-steady-state approach, Energy and Buildings (2014), http://dx.doi.org/10. 1016/j.enbuild.2014.02.084 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Photovoltaics, Status of

Cited by 81 publications

References 30 publications

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Snapshot of Photovoltaics—March 2017

Assessment of building operational energy at early stages of design – A monthly quasi-steady-state approach

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