Analysis of transient thermal sensation for “overheating” and “subcooling” conditions in a room

Abstract

Thermal comfort is a very important issue for the design of HVAC systems. The aspects of thermal comfort are also significant in the operation of the heating/cooling systems in rooms. Many investigations studied the stationary boundary conditions, while transient conditions were not in focus. Therefore, this paper describes measurements carried out in a climate room under transient conditions. After an introduction, the second part of this paper gives an overview about the experimental setup and the methodology of the dynamic investigations. The third part describes the main results of the analyzes. The fourth part includes a discussion of these results and the contribution to potential regulation systems and further investigations. As a result of these analysis, it can be stated, that the individual comfort temperature as set by the user is mostly (operative room temperature). With regard to the dynamic behavior, it must be concluded that most subjects accept a room temperature increase of without directly expressing a change request. When the operative temperature falls below the individual comfort temperature, the desire for an increase in the operative temperature is immediately expressed, even in the case of small deviations. The paper ends with a summary of the results.