SOME OBSERVATIONS ON THE RADIATIVE EXCHANGES INFLUENCE ON THERMAL COMFORT IN RECTANGULAR OPEN-SPACE ENVIRONMENTS

There are many parameters belonging to environmental or subjective kind and influencing thermohygrometric well-being conditions in both living and working places : thermo-hygrometric indexes measurable in the environment directly (Tba, Tbu, φa, va) or analytical ones (Tmr, Top) both give only a superficial and partial assessment of the environmental conditions because they do not take into account subjective evaluation parameters. A typical individual sensation of non-thermal comfort occurs in case of heat exchange phenomena in presence of sources of radiation. The heat exchange - in case of sources of radiation marked by a surface temperature such different from the mean value of the remaining surfaces (for example a large glass surface in winter and / or summer conditions) - enhances the feeling of radiative heat exchange with the body surfaces of the exposed subject. The ISO7726 standard "Thermal Environments-Instruments and Methods for Measuring Physical Quantities" has been developed to give guidance on the correct methods to be adopted in the measurement of environmental parameters; this paper presents a study on the influence of radiative exchange on the thermo hygrometric comfort in living and working environments. Two cases will be examined: case "A" with the radiant wall only formed by single wall named "1" from the wall, and case “B” with two radiating walls named “1” and “2”.