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”.

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

G. Cannistraro *
;
2015

Abstract

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”.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11570/3054373
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