TY - JOUR
T1 - A larger statistical basis and a wider application area of a re-derived PPD equation in the (NEN-)EN-ISO 7730 model
AU - Roelofsen, Paul
AU - Jansen, Kaspar
AU - Vink, Peter
PY - 2022
Y1 - 2022
N2 - This paper has the objective to initiate a discussion on potential improvements or extension of the validity of the original equation of the Predicted Percentage of Dissatisfied (PPD), according to (NEN-)EN-ISO 7730. This paper is to be regarded as a supplement to a paper on a re-derivation of the PMV equation in the Fanger model (Roelofsen, Jansen, and Vink 2021). In practice, in scientific research it regularly appears that the PMV (Predicted Mean Vote), and by extension the PPD, are applied outside the range based on which the PMV and the PPD equation are derived. In practice, this can occur, for example, in the evaluation of the measurement or calculation of temperature exceedances in a room, for sedentary activities. As it turns out, a PMV equation with an application of −3 to 3, for at least sedentary activities, would be useful in the different fields of study. For that reason, Roelofsen has adapted the PMV equation in the (NEN-)EN-ISO model. But to what extent should the PPD equation also be adjusted? After all, the PPD is also derived from and limited to a PMV of −2 to 2, according to (NEN-)EN-ISO 7730.
AB - This paper has the objective to initiate a discussion on potential improvements or extension of the validity of the original equation of the Predicted Percentage of Dissatisfied (PPD), according to (NEN-)EN-ISO 7730. This paper is to be regarded as a supplement to a paper on a re-derivation of the PMV equation in the Fanger model (Roelofsen, Jansen, and Vink 2021). In practice, in scientific research it regularly appears that the PMV (Predicted Mean Vote), and by extension the PPD, are applied outside the range based on which the PMV and the PPD equation are derived. In practice, this can occur, for example, in the evaluation of the measurement or calculation of temperature exceedances in a room, for sedentary activities. As it turns out, a PMV equation with an application of −3 to 3, for at least sedentary activities, would be useful in the different fields of study. For that reason, Roelofsen has adapted the PMV equation in the (NEN-)EN-ISO model. But to what extent should the PPD equation also be adjusted? After all, the PPD is also derived from and limited to a PMV of −2 to 2, according to (NEN-)EN-ISO 7730.
KW - HVAC systems
KW - Mathematical modelling
KW - performance
KW - thermal comfort
KW - workplace
UR - http://www.scopus.com/inward/record.url?scp=85124360517&partnerID=8YFLogxK
U2 - 10.1080/17508975.2022.2028598
DO - 10.1080/17508975.2022.2028598
M3 - Comment/Letter to the editor
AN - SCOPUS:85124360517
SN - 1750-8975
VL - 15
SP - 170
EP - 174
JO - Intelligent Buildings International
JF - Intelligent Buildings International
IS - 4
ER -