Heat in courtyards: A validated and calibrated parametric study of heat mitigation strategies for urban courtyards in the Netherlands

Mohammad Taleghani, Martin Tenpierik, Andy van den Dobbelsteen, David J. Sailor

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

Outdoor thermal comfort in urban spaces is an important contributor to pedestrians' health. A parametric study into different geometries and orientations of urban courtyard blocks in the Netherlands was therefore conducted for the hottest day in the Dutch reference year (19th June 2000 with the maximum 33. °C air temperature). The study also considered the most severe climate scenario for the Netherlands for the year 2050. Three urban heat mitigation strategies that moderate the microclimate of the courtyards were investigated: changing the albedo of the facades of the urban blocks, including water ponds and including urban vegetation. The results showed that a north-south canyon orientation provides the shortest and the east-west direction the longest duration of direct sun at the centre of the courtyards. Moreover, increasing the albedo of the facades actually increased the mean radiant temperature in a closed urban layout such as a courtyard. In contrast, using a water pool and urban vegetation cooled the microclimates; providing further evidence of their promise as strategies for cooling cities. The results are validated through a field measurement and calibration.

Original languageEnglish (US)
Pages (from-to)108-124
Number of pages17
JournalSolar Energy
Volume103
DOIs
StatePublished - May 1 2014
Externally publishedYes

Keywords

  • Climate change
  • Heat island mitigation strategies
  • Urban courtyard blocks
  • Urban microclimate

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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