Overview and assessment of radiant systems in three administrative buildings.

Abstract

Administrative buildings should provide an acceptable environment for people's work where is no excess heat, draught, noise, or low internal air temperatures. It is necessary to provide thermal well-being in each administrative building, but especially in those where the facade is of the prevailing glazed window structures.
The aim is to eliminate thermal gains and to ensure the required conditions for residence and work in administrative buildings. It is necessary to propose appropriate systems of building environment techniques. Radiant systems, low-temperature heating and high-temperature cooling, can suitably ensure an optimal environment throughout the year.
In this contribution, three applications of radiant systems in three different administrative buildings are described. In the first administrative building is the dry application system - suspension radiant covers; in the second administrative building the capillary mats are applied. The concrete core activation system has been applied in the last administrative object. The parameters of the inner environment were examined: air temperature, operating temperature, relative humidity, and airflow rate. The CO2 concentration was measured for further measurement to assess the quality of the internal air. These objective measurements and subsequently subjective evaluations of people located in the measured space were compared with the requirements of international standards for the evaluation of the internal environment.
From the measurement overview, we can say that in most measured offices, the parameters of the internal environment meet the normal values of the comfortable environment, suitable for work and residence in the workplace. During the summer season, objective evaluations corresponded to the requirements of the standard, in terms of subjective evaluation, the results were evaluated at the upper range of acceptability. For the winter period, the internal air temperature was slightly increased compared to the standards requirements, but in terms of subjective perception, the space was perceived as favorable.