Experimental yield study of bifacial PV modules in Nordic conditions

Molin, ElinHögskolan Dalarna,Energiteknik,Dalarna Univ, Energy Technol, SE-79188 Falun, Sweden.;PPAM Solkraft AB, Corp Res, SE-59072 Ljungsbro, Sweden. (author)

Funding Agencies|industrial post-graduate school Reesbe - Knowledge Foundation (KK-stiftelsen)
This study reports on the first full-year field study in Sweden using bifacial photovoltaic modules. The two test sites are located on flat roofs with a low albedo of 0.05 in Linköping (58 °N) and were studied from December 2016 to November 2017. Site 1 has monofacial and bifacial modules with a 40° tilt facing south, which is optimal for annual energy yield for monofacial modules at this location. Site 2 has monofacial 40° tilt south-facing modules and bifacial vertical east–west orientated modules. The annual bifacial energy gain (BG E ) was 5% at site 1 and 1% at site 2 for albedo 0.05. The difference in power temperature coefficients between bifacial and monofacial modules was estimated to influence BG E by +0.4 and +0.1 percentage points on site 1 and 2, respectively. A higher albedo could be investigated on a sunny day with fresh snow for the bifacial east–west modules. The specific yield was 7.57 kWh/kW p , which was a yield increase of 48% compared with tar paper at similar solar conditions.

Stridh, Bengt,UniversitetslektorMälardalens högskola,Framtidens energi,Malardalen Univ, Sweden(Swepub:mdh)bsh01 (author)
Molin, AndreasLinköpings universitet,Institutionen för ekonomisk och industriell utveckling,Tekniska fakulteten,PPAM Solkraft AB, Sweden(Swepub:liu)andmo37 (author)
Wäckelgård, EwaHögskolan Dalarna,Energiteknik,Dalarna Univ, Energy Technol, SE-79188 Falun, Sweden.(Swepub:du)ewc (author)
Högskolan DalarnaEnergiteknik (creator_code:org_t)

In:IEEE Journal of Photovoltaics: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC8:6, s. 1457-14632156-33812156-3403

By the author/editor: Molin, Elin; Stridh, Bengt, U ...; Molin, Andreas; Wäckelgård, Ewa

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Energy Engineeri ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Industrial Biote ...; and Bioenergy

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Environmental En ...; and Energy Systems

By the university: Högskolan Dalarna; Mälardalen University; Linköping University

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