Spot-Monitoring zum thermischen Komfort in Bürogebäuden

ERNESTO KUCHEN

Der Andere Verlag GmbH

Lugar: Tönning; Año: 2008 p. 203

978-3-89959-783-7

The main objective of this work is to develop a validated model by the use of comfort measurements that makes possible the forecast of a quantified assessment of the indoor thermal conditions at the work place in office building in middle European climatic conditions. The thermal comfort conditions at the work space, as part of the energy optimization in new and existing office buildings have an increasing importance. Today standards ? in particular the [DIN EN ISO 7730], the successor of standard [ISO 7730] ? represent the "state of the art". A feedback of user requirements or assessments is not done in practice. Based on the results of measurements in real buildings, the thermal comfort in office building is identified in the practice, the standards to evaluation are reviewed and it make more precise with regard to their applicability. In addition, a new short-term measurement method is designed to determine the thermal comfort conditions in work spaces and it is validated in terms of its forecasting ability. The ?Spot-Monitoring? concept as a short-term assessment procedure consists on measurements of a duration of 5 minutes, which is applied to defined places into the office building at different times of the day in winter, summer and in the transitional period. In addition to measuring the climate parameters with self-configured mobile measurement system is both a short-term survey (KZF) of the user thru questionnaire regarding the thermal and non-thermal aspects of the indoor environment. The aim is to identify an optimum operative temperature across a comparison of objective data from the measurement and subjective evaluation of the work space from the users. During the field study 280 work spaces in 30 office buildings in Germany have been assessed, taking into account the external and internal climate parameter relevant for the thermal comfort. All investigations were conducted between autumn 2004 and 2006. With the help of the users subjective evaluations of the indoor climate areas are identified within which the operative temperature felt as warm, cold or comfortable. For naturally ventilated spaces, a wider temperature range is available. This suggests that the adaptability of users in naturally ventilated spaces is better than in mixed-mode and air conditioned spaces. Compared to naturally ventilated spaces, users in air conditioned spaces have an up to 1.5 times more sensitive thermal perception. This value is an evidence of the different thermal adaptation levels, which differ significantly in naturally ventilated spaces during the summer and the transitional period and from those in mixed-mode and air conditioned spaces. The strong influence of the outdoor climate on the expectations and willingness of users to adjust the thermal conditions of the work spaces leads to a differentiation between thermal comfort areas into two zones, depending on the ventilation and air conditioning system.