Projects per year
Abstract
At present a lack of guidelines for the design of thermal comfort in naturally ventilated office buildings leads to uncertainty when planning such buildings in Germany. The present work was carried out in order to identify differences in the perception of thermal comfort of office workers in naturally ventilated and air-conditioned buildings. It is based
on both subjective data from interviews as well as on objective data from physical measurements. The analysis includes data collected in 14 German office buildings from the ProKlimA-Survey. The analysis of the interviews shows that occupants in naturally ventilated office buildings are significantly more often satisfied with their thermal environment than occupants in
air-conditioned buildings. Several non-thermal parameters influence thermal comfort. The impact of the non-thermal variables depends on the type of ventilation and the perception of the indoor environment temperature (hot or cool).
In the literature it is mentioned that occupants in naturally ventilated offices accept a wider range of indoor temperatures than occupants in air-conditioned offices. The bandwidths of temperature found in the present work are the same for both types of ventilation. Relevant literature comprises four major approaches. On the one hand there is the PMV-Model by Fanger and its modification by Mayer. On the other hand there are two adaptive approaches: a Dutch guideline and the ASHRAE approach.
Both adaptive approaches determine the indoor comfort temperature dependent on a mean outdoor temperature.
The suitability of the four approaches for assessing and predicting thermal comfort in naturally ventilated and air-conditioned offices was investigated. The closest agreement between predictions and interviews for air-conditioned
offices is achieved by Mayer’s modification of the PMV-Model. For naturally ventilated offices the ASHRAE approach shows the best match.
So far Fanger's PMV-Model is the standardized method to assess thermal comfort in Germany and Europe. The results demonstrate that new guidelines
for assessing and planning of thermal comfort in office buildings are required for both natural ventilation and air-conditioning.
on both subjective data from interviews as well as on objective data from physical measurements. The analysis includes data collected in 14 German office buildings from the ProKlimA-Survey. The analysis of the interviews shows that occupants in naturally ventilated office buildings are significantly more often satisfied with their thermal environment than occupants in
air-conditioned buildings. Several non-thermal parameters influence thermal comfort. The impact of the non-thermal variables depends on the type of ventilation and the perception of the indoor environment temperature (hot or cool).
In the literature it is mentioned that occupants in naturally ventilated offices accept a wider range of indoor temperatures than occupants in air-conditioned offices. The bandwidths of temperature found in the present work are the same for both types of ventilation. Relevant literature comprises four major approaches. On the one hand there is the PMV-Model by Fanger and its modification by Mayer. On the other hand there are two adaptive approaches: a Dutch guideline and the ASHRAE approach.
Both adaptive approaches determine the indoor comfort temperature dependent on a mean outdoor temperature.
The suitability of the four approaches for assessing and predicting thermal comfort in naturally ventilated and air-conditioned offices was investigated. The closest agreement between predictions and interviews for air-conditioned
offices is achieved by Mayer’s modification of the PMV-Model. For naturally ventilated offices the ASHRAE approach shows the best match.
So far Fanger's PMV-Model is the standardized method to assess thermal comfort in Germany and Europe. The results demonstrate that new guidelines
for assessing and planning of thermal comfort in office buildings are required for both natural ventilation and air-conditioning.
Translated title of the contribution | Thermal Comfort - Natural Ventilation versus Air-Conditioning in Office Buildings from the Occupant's Point of View |
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Original language | German |
Place of Publication | Munich |
Publisher | |
Publication status | Published - 2005 |
Externally published | Yes |
Keywords
- Thermal comfort
- Adaptation
- personal control
- Post-occupancy evaluation
- Logistic regression
- interrelation of indoor environment parameters
- non-physical impact parameters
- occupant perception
- user perception
- multi-domain
- perceived control
Fingerprint
Dive into the research topics of 'Thermal Comfort - Natural Ventilation versus Air-Conditioning in Office Buildings from the Occupant's Point of View'. Together they form a unique fingerprint.Projects
- 2 Finished
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01 - Human well-being and technology in architecture: Overview on projects at my previous affiliations and actual projects
Hellwig, R. T. (Other)
01/08/1995 → 30/09/2018
Project: Research
File -
05 - Office Buildings: Overview on projects at my previous affiliations
Hellwig, R. T. (Other)
01/08/1995 → 30/09/2018
Project: Research
File
Research output
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Design of adaptive opportunities for people in buildings
Hellwig, R. T., Teli, D., Schweiker, M., Choi, J.-H., Lee, J. M. C., Mora, R., Rawal, R., Wang, Z. & Al-Atrash, F., 19 Apr 2022, Routledge Handbook of Resilient Thermal Comfort. Nicol, F., Rijal, H. B. & Roaf, S. (eds.). 1 ed. Routledge, 17 p. (Routledge International Handbooks).Research output: Contribution to book/anthology/report/conference proceeding › Book chapter › Research › peer-review
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Indoor environment in office buildings - Perception of personal control und use of adaptive opportunities at workplaces
Al-Atrash, F., Hellwig, R. T. & Wagner, A., Oct 2022, In: Bauphysik. 44, 5, p. 264-281 bapi.202200026.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile1 Citation (Scopus)109 Downloads (Pure) -
Teaching the concept of adaptive thermal comfort in building design education
Teli, D., Hellwig, R. T., Schweiker, M., Choi, J.-H., Lee, J. M. C., Mora, R., Rawal, R., Wang, Z. & Al-Atrash, F., 1 Nov 2020, Proceedings 16th Indoor Air 2020. ABS-0556Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review