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Vertical temperature increase in multi-storey buildings

Författare

Summary, in English

Indoor temperature is by measurements stated to rise 0.1 – 0.2°C per storey upwards in multi-storey buildings, despite occupants’ possibility to control the temperature. Due to upward air temperature gradient in rooms there will be a heat transfer through slabs upwards. The size of this depends on

insulation degree of building envelope and slabs and air flow through the building. With a linear mathematical model, considering 1 m² floor area, it is shown how some parameters affect the heat transfer. Starting position for the model is a building in the thermal balance from which deviations are calculated. The model gives, for a basic case, results that agree well with the measured values. The vertical temperature increase, results in lower temperature in lower storeys and higher temperature in upper storeys. Total temperature rise for 4 – 28 storeys are in the range 0.5 – 0.7°C,

which give vertical heat transfer of 0.6 – 1.1 W/m². A better insulated building envelope will increase the vertical temperature deviations. Better insulated slabs between the storeys will decrease the deviations. A building with well insulated envelope should also have well insulated slabs between

storeys to limit the vertical heat transfer and temperature differences between storeys.

Publiceringsår

2014

Språk

Engelska

Sidor

814-821

Publikation/Tidskrift/Serie

NSB 2014 : 10th Nordic Symposium on Building Physics,15-19 June 2014 Lund, Sweden

Dokumenttyp

Konferensbidrag

Ämne

  • Building Technologies

Nyckelord

  • Thermal indoor climate
  • indoor temperature
  • vertical temperature increase
  • case study
  • mathematical model
  • disturbance model

Conference name

10th Nordic Symposium on Building Physics

Conference date

2014-06-15

Conference place

Lund, Sweden

Status

Published

ISBN/ISSN/Övrigt

  • ISBN: 978-91-88722-53-9