DOI:10.1016/j.apenergy.2008.07.011
There is evidence suggesting that subjects become accustome... more DOI:10.1016/j.apenergy.2008.07.011
There is evidence suggesting that subjects become accustomed to levels of warmth prevailing within buildings on time scales of weeks to months. Such exposure will influence in occupants’ expectation of their thermal environments (i.e. thermal history). This paper investigates the effects of short-term physiological acclimatization on subjects’ perception of thermal and air movement preferences. Subjective thermal perception experiments were carried out in a climate chamber to evaluate temperature and air movement acceptability across a range of simulated hot-humid conditions. Experiments were carried out during the winter season in Japan so that subjects, from different nationalities, could all be brought to comparable levels of heat acclimatization. This method consists in exposing subjects to hot-humid conditions and increasing their core temperature by means of exercise on a daily basis. The physiological monitoring of subjects in these experiments established that core temperature was increased through exercise in heat. The increment in core temperature by three consecutive days appeared to be an effective short acclimatization procedure, as demonstrated by the diminution in thermal sensation, improved thermal acceptability and thermal preferences during exposure to warm thermal environments (SET∗ varying from 25 to 31 °C). The results showed that it is possible to acclimatize such ‘air-conditioning addicts’ to warmer indoor environments without, however, compromising their thermal acceptability. In warm and humid climates, such trend for saturation of air-conditioning exposure needs to be more understood. The results presented reinforce the opportunities to use higher set-points in air-conditioning buildings, contributing to significant energy consumption cut-offs within the built environment.
European Commission, Directorate General Environment, 2016
The City-zen Roadshow travels with a team of internationally recognized experts, in the field of ... more The City-zen Roadshow travels with a team of internationally recognized experts, in the field of energyplanning and design to help develop a sustainable agenda for cities and their neighbourhoods. It will visit 9 cities in total over a 5-year period who are seeking expert guidance on how to become more sustainable and wish to move towards energy neutrality. The overall aim of the Roadshow team, known as ‘Roadies’, is to work closely with people from the hosting city, whether they be city leaders, energy planners, local architects, professionals, academics, students and of course the citizens themselves. The Roadshow spends 5 days in each hosting city to deliver energy and urban design workshops in which all local stakeholders are welcome and encouraged to join and to take ownership of the final outcomes. Outcomes that will allow the cities recourses, both people and energy, to be directed effectively, by highlighting the energy challenges and potentials to be found in their neighbourhoods, and to finally present a sustainable ‘City Vision’.The following report will describe the activities and outcomes of the Roadshow that took place in Bornova, a municipality of the city of Izmir (Turkey) between the 4th & 8th of April 2016. The City-zen 'Izmir' Report would be published as part of Bornova's Municipality's 'Ideas for Bornova' document. Bornova is a district of Izmir
Heat is transferred through building envelopes by conduction, radiation, and convection. Of these... more Heat is transferred through building envelopes by conduction, radiation, and convection. Of these, convective heat transfer is often the weakest ‘link’ in the overall heat transfer model. While conduction and radiation heat transfer are supported by well-established analytical and numerical models, the treatment of convection is much less rigorous. Convection modeling involves solution of fluid dynamics problems in which the
This paper describes and demonstrates how to use the optimization program GenOpt with the buildin... more This paper describes and demonstrates how to use the optimization program GenOpt with the building energy simulation program ESP-r. GenOpt, a generic optimization program, minimises an objective function that is evaluated by an external simulation program. It has been developed for optimization problems that are computationally expensive and that may have non-smooth objective functions. ESP-r is a research oriented building simulation program that is well validated and has been used to conduct various building energy analysis studies. In this paper, the necessary file preparations are described and a simple optimization example is presented.
... Authors: Arndt, U Beausoleil-Morrison, I Davis, M D'haeseleer, William Dorer, V Entchev,... more ... Authors: Arndt, U Beausoleil-Morrison, I Davis, M D'haeseleer, William Dorer, V Entchev, E Ferguson, A Gusdorf, J Kelly, N Manning, M Peeters, Leen Sasso, M Schreiber, D Sibilio, S Siemens, K Swinton, M. Issue Date: Dec-2007. Affiliation: Katholieke Universiteit Leuven. ...
DOI:10.1016/j.apenergy.2008.07.011
There is evidence suggesting that subjects become accustome... more DOI:10.1016/j.apenergy.2008.07.011
There is evidence suggesting that subjects become accustomed to levels of warmth prevailing within buildings on time scales of weeks to months. Such exposure will influence in occupants’ expectation of their thermal environments (i.e. thermal history). This paper investigates the effects of short-term physiological acclimatization on subjects’ perception of thermal and air movement preferences. Subjective thermal perception experiments were carried out in a climate chamber to evaluate temperature and air movement acceptability across a range of simulated hot-humid conditions. Experiments were carried out during the winter season in Japan so that subjects, from different nationalities, could all be brought to comparable levels of heat acclimatization. This method consists in exposing subjects to hot-humid conditions and increasing their core temperature by means of exercise on a daily basis. The physiological monitoring of subjects in these experiments established that core temperature was increased through exercise in heat. The increment in core temperature by three consecutive days appeared to be an effective short acclimatization procedure, as demonstrated by the diminution in thermal sensation, improved thermal acceptability and thermal preferences during exposure to warm thermal environments (SET∗ varying from 25 to 31 °C). The results showed that it is possible to acclimatize such ‘air-conditioning addicts’ to warmer indoor environments without, however, compromising their thermal acceptability. In warm and humid climates, such trend for saturation of air-conditioning exposure needs to be more understood. The results presented reinforce the opportunities to use higher set-points in air-conditioning buildings, contributing to significant energy consumption cut-offs within the built environment.
European Commission, Directorate General Environment, 2016
The City-zen Roadshow travels with a team of internationally recognized experts, in the field of ... more The City-zen Roadshow travels with a team of internationally recognized experts, in the field of energyplanning and design to help develop a sustainable agenda for cities and their neighbourhoods. It will visit 9 cities in total over a 5-year period who are seeking expert guidance on how to become more sustainable and wish to move towards energy neutrality. The overall aim of the Roadshow team, known as ‘Roadies’, is to work closely with people from the hosting city, whether they be city leaders, energy planners, local architects, professionals, academics, students and of course the citizens themselves. The Roadshow spends 5 days in each hosting city to deliver energy and urban design workshops in which all local stakeholders are welcome and encouraged to join and to take ownership of the final outcomes. Outcomes that will allow the cities recourses, both people and energy, to be directed effectively, by highlighting the energy challenges and potentials to be found in their neighbourhoods, and to finally present a sustainable ‘City Vision’.The following report will describe the activities and outcomes of the Roadshow that took place in Bornova, a municipality of the city of Izmir (Turkey) between the 4th & 8th of April 2016. The City-zen 'Izmir' Report would be published as part of Bornova's Municipality's 'Ideas for Bornova' document. Bornova is a district of Izmir
Heat is transferred through building envelopes by conduction, radiation, and convection. Of these... more Heat is transferred through building envelopes by conduction, radiation, and convection. Of these, convective heat transfer is often the weakest ‘link’ in the overall heat transfer model. While conduction and radiation heat transfer are supported by well-established analytical and numerical models, the treatment of convection is much less rigorous. Convection modeling involves solution of fluid dynamics problems in which the
This paper describes and demonstrates how to use the optimization program GenOpt with the buildin... more This paper describes and demonstrates how to use the optimization program GenOpt with the building energy simulation program ESP-r. GenOpt, a generic optimization program, minimises an objective function that is evaluated by an external simulation program. It has been developed for optimization problems that are computationally expensive and that may have non-smooth objective functions. ESP-r is a research oriented building simulation program that is well validated and has been used to conduct various building energy analysis studies. In this paper, the necessary file preparations are described and a simple optimization example is presented.
... Authors: Arndt, U Beausoleil-Morrison, I Davis, M D'haeseleer, William Dorer, V Entchev,... more ... Authors: Arndt, U Beausoleil-Morrison, I Davis, M D'haeseleer, William Dorer, V Entchev, E Ferguson, A Gusdorf, J Kelly, N Manning, M Peeters, Leen Sasso, M Schreiber, D Sibilio, S Siemens, K Swinton, M. Issue Date: Dec-2007. Affiliation: Katholieke Universiteit Leuven. ...
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There is evidence suggesting that subjects become accustomed to levels of warmth prevailing within buildings on time scales of weeks to months. Such exposure will influence in occupants’ expectation of their thermal environments (i.e. thermal history). This paper investigates the effects of short-term physiological acclimatization on subjects’ perception of thermal and air movement preferences. Subjective thermal perception experiments were carried out in a climate chamber to evaluate temperature and air movement acceptability across a range of simulated hot-humid conditions. Experiments were carried out during the winter season in Japan so that subjects, from different nationalities, could all be brought to comparable levels of heat acclimatization. This method consists in exposing subjects to hot-humid conditions and increasing their core temperature by means of exercise on a daily basis. The physiological monitoring of subjects in these experiments established that core temperature was increased through exercise in heat. The increment in core temperature by three consecutive days appeared to be an effective short acclimatization procedure, as demonstrated by the diminution in thermal sensation, improved thermal acceptability and thermal preferences during exposure to warm thermal environments (SET∗ varying from 25 to 31 °C). The results showed that it is possible to acclimatize such ‘air-conditioning addicts’ to warmer indoor environments without, however, compromising their thermal acceptability. In warm and humid climates, such trend for saturation of air-conditioning exposure needs to be more understood. The results presented reinforce the opportunities to use higher set-points in air-conditioning buildings, contributing to significant energy consumption cut-offs within the built environment.
Papers by Leen Peeters
There is evidence suggesting that subjects become accustomed to levels of warmth prevailing within buildings on time scales of weeks to months. Such exposure will influence in occupants’ expectation of their thermal environments (i.e. thermal history). This paper investigates the effects of short-term physiological acclimatization on subjects’ perception of thermal and air movement preferences. Subjective thermal perception experiments were carried out in a climate chamber to evaluate temperature and air movement acceptability across a range of simulated hot-humid conditions. Experiments were carried out during the winter season in Japan so that subjects, from different nationalities, could all be brought to comparable levels of heat acclimatization. This method consists in exposing subjects to hot-humid conditions and increasing their core temperature by means of exercise on a daily basis. The physiological monitoring of subjects in these experiments established that core temperature was increased through exercise in heat. The increment in core temperature by three consecutive days appeared to be an effective short acclimatization procedure, as demonstrated by the diminution in thermal sensation, improved thermal acceptability and thermal preferences during exposure to warm thermal environments (SET∗ varying from 25 to 31 °C). The results showed that it is possible to acclimatize such ‘air-conditioning addicts’ to warmer indoor environments without, however, compromising their thermal acceptability. In warm and humid climates, such trend for saturation of air-conditioning exposure needs to be more understood. The results presented reinforce the opportunities to use higher set-points in air-conditioning buildings, contributing to significant energy consumption cut-offs within the built environment.