Building-Integrated Photovoltaic/Thermal (BIPVT): LCA of a façade-integrated prototype and issues about human health, ecosystems, resources

Chrysovalantou Lamnatou, Mervyn Smyth, Daniel Chemisana

Research output: Contribution to journalArticle

6 Citations (Scopus)
17 Downloads (Pure)

Abstract

Building-Integrated Photovoltaic/Thermal (BIPVT) technology offers multiple advantages; however, these types of installations include materials such as Photovoltaic (PV) cells and metals which considerably influence BIPVT environmental impact. Therefore, there is a need to evaluate BIPVT environmental profile, for instance by means of Life Cycle Assessment (LCA). In light of the issues mentioned above, the present article is an LCA study that assesses the environmental performance of a BIPVT prototype that has been developed and patented at the Ulster University (Belfast, UK). The investigation places emphasis on material manufacturing, based on Cumulative Energy Demand (CED), Global Warming Potential (GWP), ReCiPe, Ecological footprint and USEtox. The results show that according to all the adopted methods/environmental indicators and based on primary materials, the PV cells and the two vessels (steel) are the components with the three highest impacts. Scenarios which include recycling of steel, plastics and brass (landfill for the other materials has been assumed), based on CED, GWP 100a and ReCiPe endpoint, have been examined. It was found that steel recycling offers a considerable impact reduction, ranging from 47% to 85%. Furthermore, the impact of the proposed BIPVT module per m 2 of thermal absorber has been calculated. The results, based on primary materials, show 4.92 GJ prim /m 2 and 0.34 t CO 2.eq /m 2 (GWP 100a). In addition, according to USEtox/ecotoxicity, USEtox/human toxicity-non-cancer (scenario based on primary materials), the PV cells present the highest contributions to the total impact of the module: 55% in terms of ecotoxicity and 86% concerning human toxicity/non-cancer. A comparison with literature is provided. Moreover, a separate section of the article is about factors which influence BIPVT environmental profile, discussing parameters such as the storage materials and the end-of-life management.

Original languageEnglish
Pages (from-to)1576-1592
Number of pages17
JournalScience of the Total Environment
Volume660
Early online date4 Jan 2019
DOIs
Publication statusPublished - 10 Apr 2019

Keywords

  • Life Cycle Assessment (LCA
  • Building-Integrated Photovoltaic/Thermal (BIPVT)
  • Greenhouse-Gas (GHG) emissions
  • Cumulative Energy Demand (CED)
  • Human health
  • Ecosystems
  • Resources
  • Human toxicity
  • Ecotoxicity
  • Life Cycle Assessment (LCA)
  • Ecosystems Resources

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