Abstract
The need to increase the level of quality of indoor environments requires an extremely accurate definition of the microclimatic requisites to guarantee, in the spaces where people live and work, global and local conditions of comfort, considering, at the same time, the aspects related to energy savings and environmental sustainability. In this framework, the paper proposes a comparison of indoor parameters for three different types of heating emitters: fan-coils, baseboards heaters, and radiant floor systems. The comparison is based on seasonal monitoring performed in a test-room located in a Mediterranean climate; it can simulate an insulated room with office usage. The proposed indices demonstrate that the floor radiant system is characterized by lower horizontal and vertical differences in air temperature distribution that can guarantee more comfortable conditions and lower heat losses. The operative temperature is often higher than the neutral point; thus, management with a lower set-point temperature should be experimented with in further studies. More generally, the introduced method could help designers to choose the proper system and management strategy with the dual purpose to select a comfortable but energy savings-oriented operating temperature.
Highlights
During the winter, the solar radiation, the occupants, and the equipment can contribute to create the comfort conditions with lower set-points, and it is possible to implement cheap energy measures according to the type of emitters installed in the building. Considering these issues, this paper proposes an experimental comparison during the heating period of three emitters supplied by a gas boiler in a Mediterranean climate to help designers to choose the proper system and management strategy with the dual purpose of selecting a comfortable but energy saving-oriented operating temperature
This paper focuses on the evaluation of the incidence of local heating emitters on thermal comfort on seasonal and diurnal scales
The first analysis concerns the comparison of indoor thermal comfort through the analysis of the operative temperature, relative humidity, and air speed at the center of room
Summary
According to the definition by ASHRAE [1,2], thermal comfort is the condition of mind that expresses satisfaction with the thermal environment. It has a wide connotation, including physiological and psychological aspects in addition to ambient characteristics [3,4]. The overall thermal sensation and the degree of discomfort of people exposed to moderate thermal environments can be determined according to international standard. EN ISO 7730 [5] This standard allows the analytical determination and interpretation of thermal comfort conditions through the calculation of the predicted mean vote (PMV).
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