Accurate prediction of heating energy demand of courtyard's surrounding envelopes using temperature correction factor

verfasst von

Aysan Forouzandeh, Torsten Richter

Abstract

It is widely accepted that the climatic factors—including solar load, wind flow pattern and external air temperature—strongly affect building energy consumption. Meanwhile, the microclimate of semi-closed spaces between buildings has direct and indirect consequences on heat transfer through building envelopes. This study demonstrates how courtyard configuration can modify the climate and external air temperature and how the microclimate condition can be considered for functionally accurate calculation of heat loss and thermal loads of buildings. Based on the experimental and computational results, increasing the courtyard's depth by restricting the sky view factor (SVF) and the heat exchange with courtyard's outside at low levels, creates the individual microclimate. The thermal environment of this middle space is affected more than outside by surrounding rooms and the thermal properties of the building walls. The findings, which are limited to experimental cases in the Hanover climate region, propose to consider the temperature of courtyard depending on its aspect ratio and glazing percentage with a temperature correction factor (F _{x , Heat load} ) between 0.9 to 2.2.

Organisationseinheit(en)

Institut für Bauphysik

Typ

Artikel

Journal

Energy and buildings

Band

193

Seiten

49-68

Anzahl der Seiten

20

ISSN

0378-7788

Publikationsdatum

15.06.2019

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Tief- und Ingenieurbau, Bauwesen, Maschinenbau, Elektrotechnik und Elektronik

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie, SDG 13 – Klimaschutzmaßnahmen

Elektronische Version(en)

https://doi.org/10.1016/j.enbuild.2019.03.030 (Zugang: Geschlossen)