Cool black roof impacts into the cooling and heating load demand of a residential building in various climates

Mehdi Baneshi, Hiroki Gonome, Shigenao Maruyama

Research output: Research - peer-reviewArticle

  • 5 Citations

Abstract

This paper describes the impacts of different cool black paints on cooling and heating load demand of a residential building in different climates. Cool paints with dark appearance and high reflectance in near infrared portion of sunlight are of great interest by the owners of homes to satisfy both desired visual and energy saving aspects. Three copper oxide (CuO) powders, different in pigment size, and a chromium-iron oxide (Cr2O3-Fe2O3) powder, as a commercial cool black pigment, are used to make the black paints. The samples are made on both conventional black and cool white base coats. The spectral reflectance of all samples in solar range (0.3-2.5 μm) and infrared region (2.5-25 μm) is measured. The thermal emittance of the samples is estimated using the spectral reflectance measurement and validated by the measurement of infrared camera. A typical residential single-stage single-family home in three different climates of Iran is considered and the impacts of applying the different black paints on cooling and heating load demand are discussed. The results show that the peak and annual cooling load demand decrease by 0.4-1.4 kW (6-13%) and 405-2202 kWh (6-14%), respectively, depends on the type of pigmented coating and climate conditions.

LanguageEnglish
Pages21-33
Number of pages13
JournalSolar Energy Materials and Solar Cells
Volume152
DOIs
StatePublished - 2016 Aug 1
Externally publishedYes

Fingerprint

Paint
Roofs
Loads (forces)
Cooling
Heating
Infrared radiation
Pigments
Powders
Reflectometers
Chromium
Energy conservation
Cameras
Coatings
ferric oxide
cupric oxide
Hot Temperature
Copper oxides
Iron oxides

Keywords

  • Coating
  • Cool black paint
  • Cooling load
  • CrO-FeO
  • CuO
  • Heating load

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films

Cite this

Cool black roof impacts into the cooling and heating load demand of a residential building in various climates. / Baneshi, Mehdi; Gonome, Hiroki; Maruyama, Shigenao.

In: Solar Energy Materials and Solar Cells, Vol. 152, 01.08.2016, p. 21-33.

Research output: Research - peer-reviewArticle

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