Publicomos

Notice (permalien)

Réf.

45299

Type

article

Titre

Target-based visibility assessment on building envelopes : applications to PV and cultural-heritage values

Langues

English

Auteurs

Lingfors, David / Johansson, Tim / Widén, Joakim / Broström, Tor

Lieu de publication

Amsterdam

Pays de publication

Netherlands

Maison d'édition

Elsevier

Date

2019

Pages

8 p.

Titre de la revue

Energy and Buildings

Vol. & n°

v. 204

ISSN

0378-7788 [print]
1872-6178 [web]

Mots-clés

solar panels / roofs / built heritage / integration in the landscape / evaluations / preservation / case studies

Pays mentionnés

Sweden

Monuments et sites

Stockholm, Sweden / Hanseatic town of Visby, Gotland, Sweden

N° Patrimoine mondial

731

Résumé en anglais

Solar energy applications have, in recent years, become a common element in the urban landscape, especiallyon roofs and facades. However, it is important that the integration of solar energy in the built environment donot distort the fabric or expression of the existing building envelope, not at least in areas of high cultural-heritage values. The aesthetics depend, to a large extent, on how visible the new technology, such asphotovoltaic (PV) panels, is. This paper describes a method for visibility assessment of building envelopes.It is referred to as target-based as it, in contrast to previously reported methods, bases the assessmentfrom the perspective of the building envelope itself, rather than possible vantage points on the ground.The method was evaluated for two Swedish cities; Stockholm and Visby. In Stockholm, each building wasevaluated based on its cultural-heritage values, solar irradiation and visibility. Deploying PV only on theroofs with the lowest cultural-heritage values, with insolation>900 kWh/m2, and with no visibility fromground, results in a total PV yield of up to 2% of the total electricity demand. In Visby, various definitionsof the vantage area were evaluated, from which the building envelope can be seen. It was found that thechoice of vantage area greatly impacts the solar energy potential. If the vantage area is defined by thepublic domain, i.e., streets and other public open spaces, the non-visible roof area doubles compared to ifall ground/terrain defines it. Compared to previous studies, the use of a vantage area, instead of discretevantage points, seems to result in higher visibility of the roofs.

URL

http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-397881

DOI

https://doi.org/10.1016/j.enbuild.2019.109483

Document joint

FULLTEXT01.pdf

Licence

Creative Commons Attribution-Non Commercial-No Derivatives (BY-NC-ND)