Effects of building refurbishment on the operative temperature and ACH

Ferenc Kalmár, Tünde Kalmár, Edit Varga, Imre Csáki, Tünde Jenei

Research output: Contribution to conferencePaper

Abstract

In residential buildings and block of flats built until 1980, because of the poor thermal insulation of the external building elements, the energy consumption is high in order to assure the thermal comfort needs of the occupants. The air tightness of the closing elements is also low so the infiltration is high enough to avoid the capillary condensation. The mean radiant temperature of the building elements is slightly low because of the poor insulation. To obtain a certain operative temperature value the indoor air temperature has to be kept at a higher value. In both cases appears supplementary energy consumption. In this paper two side effects of additional thermal insulation are analysed from energy point of view. On one hand to avoid capillary condensation lower ACH is needed, therefore energy savings up to 7% are obtained. On the other hand because of the higher mean radiant temperature to obtain the same operative temperature lower air temperature should be provided, so the energy savings can reach even 20%.

Original languageEnglish
Publication statusPublished - Dec 1 2009
Event9th International Healthy Buildings Conference and Exhibition, HB 2009 - Syracuse, NY, United States
Duration: Sep 13 2009Sep 17 2009

Other

Other9th International Healthy Buildings Conference and Exhibition, HB 2009
CountryUnited States
CitySyracuse, NY
Period9/13/099/17/09

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Keywords

  • ACH
  • Additional insulation
  • Energy consumption
  • Operative temperature

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

Cite this

Kalmár, F., Kalmár, T., Varga, E., Csáki, I., & Jenei, T. (2009). Effects of building refurbishment on the operative temperature and ACH. Paper presented at 9th International Healthy Buildings Conference and Exhibition, HB 2009, Syracuse, NY, United States.