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doc/engineering-reference/src/simulation-models-encyclopedic-reference-005/occupant-thermal-comfort.tex

@@ -1165,11 +1165,11 @@ \subsubsection{Description of the model and algorithm}\label{description-of-the-
 
 \subsection{ASHRAE 55 Elevated Air Speed Cooling Effect Model}\label{elevated-air-speed-ce-model}
 
-ASHRAE Standard 55-2017 Section 5.3 requires that the Elevated Air Speed Comfort Zone Method be used when average air speed Va is greater than 0.10 m/s. The method provides cooling credit for elevated air velocity in the space. The method can be used to evaluate passive cooling technologies such as natural ventilation, ceiling fan, and portable fan.
+ASHRAE Standard 55-2017 Section 5.3 requires that the Elevated Air Speed Comfort Zone Method be used when average air speed \(V_{a}\) is greater than 0.10 m/s. The method provides cooling credit for elevated air velocity in the space. The method can be used to evaluate passive cooling technologies such as natural ventilation, ceiling fan, and portable fan.
 
 \subsubsection{Description of the model and algorithm}\label{description-of-the-model-and-algorithm-4}
 
-The Pierce Two-Node Standard Effective Temperature (SET) model is used to account for the cooling effect of air speeds greater than the 0.10 m/s. Specifically, for a given set of environmental and personal variables, including an elevated average air speed, an average air temperature \(t_{a}\), and a mean radiant temperature \(t_{r}\), the SET is first calculated. Then the average air speed Va is replaced by still air (0.1 m/s), and the average air temperature and radiant temperature are adjusted according to the cooling effect (CE). The CE of the elevated air speed is the value that, when subtracted equally from both the average air temperature and the mean radiant temperature, yields the same SET under still air as in the first SET calculation under elevated air speed.
+The Pierce Two-Node Standard Effective Temperature (SET) model is used to account for the cooling effect of air speeds greater than the 0.10 m/s. Specifically, for a given set of environmental and personal variables, including an elevated average air speed, an average air temperature \(t_{a}\), and a mean radiant temperature \(t_{r}\), the SET is first calculated. Then the average air speed \(V_{a}\) is replaced by still air (0.1 m/s), and the average air temperature and radiant temperature are adjusted according to the cooling effect (CE). The CE of the elevated air speed is the value that, when subtracted equally from both the average air temperature and the mean radiant temperature, yields the same SET under still air as in the first SET calculation under elevated air speed.
 
 The following is a formal description of this process. To define the CE, we assert that it satisfies the following:
 

doc/input-output-reference/src/overview/group-internal-gains-people-lights-other.tex

@@ -221,7 +221,7 @@ \subsubsection{Inputs}\label{inputs-025}
   ASHRAE 55-2017 Elevated Air Speed Cooling Effect Model is applied to calculate related thermal comfort metrics. Elevated Air Speed Cooling Effect, Cooling Effect Adjusted PMV, and Cooling Effect Adjusted PPD are calculated and reported as each time step. Apart from existing required fields in People object, extra fields required for this model include Surface Name/Angle Factor List Name, Work Efficiency Schedule Name, Clothing Insulation Schedule Name, and Air Velocity Schedule Name.
 
   \item[AnkleDraftASH55] 
-  ASHRAE 55-2017 Ankle Draft Risk Model is applied to calculate related thermal comfort metrics. Zone Thermal Comfort ASHRAE 55 Ankle Draft PPD is calculated and reported as each time step. Apart from existing required fields in People object, extra fields required for this model include Surface Name/Angle Factor List Name, Work Efficiency Schedule Name, Clothing Insulation Schedule Name, Air Velocity Schedule Name, and Ankle Level Air Velocity Schedule Name.
+  ASHRAE 55-2017 Ankle Draft Risk Model is applied to calculate related thermal comfort metrics. Zone Thermal Comfort ASHRAE 55 Ankle Draft PPD is calculated and reported as each time step. Apart from existing required fields in People object, extra fields required for this model include Surface Name/Angle Factor List Name, Work Efficiency Schedule Name, Clothing Insulation Schedule Name, Air Velocity Schedule Name, and Ankle Level Air Velocity Schedule Name. Ankle draft PPD calculations are only applicable for relative air velocity is below 0.2 m/s, and the subject’s metabolic rate and clothing level should be kept below 1.3 met and 0.7 clo. PPD at ankle draft will be set to -1.0 if if these conditions are not met.
 
 \end{description}
 
@@ -588,6 +588,22 @@ \subsubsection{Outputs}\label{outputs-017}
 
 This field reports the ideal indoor operative temperature, or comfort temperature, as determined by the CEN-15251 adaptive comfort model. Category I, II, and II limits for indoor operative temperature are defined as no greater than 2, 3, and 4 degrees C from this value respectively. A value of -1 means not applicable (when running average outdoor temp is outside the range of 10.0 to 30.0C).
 
+\paragraph{Zone Thermal Comfort ASHRAE 55 Elevated Air Speed Cooling Effect}\label{zone-thermal-comfort-ashrae55-elevated-air-speed-cooling-effect}
+
+This field is the calculated Cooling Effect of the elevated air speed in degree celsius. It is the value that, when subtracted equally from both the average air temperature and the mean radiant temperature, yields the same SET under still air as in the first SET calculation under elevated air speed.
+
+\paragraph{Zone Thermal Comfort ASHRAE 55 Elevated Air Speed Cooling Effect Adjusted PMV}\label{zone-thermal-comfort-ashrae55-elevated-air-speed-cooling-effect-adjusted-pmv}
+
+This field is the \"predicted mean vote\" (PMV) calculated using the Fanger PMV model, adjusted by the ASHRAE 55 Elevated Air Speed Cooling Effect. The Cooling Effect adjusted PMV for an environment with elevated average air speed is calculated using the adjusted average air temperature, the adjusted radiant temperature, and still air (0.1 m/s). 
+
+\paragraph{Zone Thermal Comfort ASHRAE 55 Elevated Air Speed Cooling Effect Adjusted PPD}\label{zone-thermal-comfort-ashrae55-elevated-air-speed-cooling-effect-adjusted-ppd}
+
+This field is the \"ppredicted percentage of dissatisfied\" (PPD) calculated using the Fanger PMV-PPD model, adjusted by the ASHRAE 55 Elevated Air Speed Cooling Effect. The Cooling Effect adjusted PPD for an environment with elevated average air speed is calculated using the adjusted average air temperature, the adjusted radiant temperature, and still air (0.1 m/s). 
+
+\paragraph{Zone Thermal Comfort ASHRAE 55 Ankle Draft PPD}\label{zone-thermal-comfort-ashrae55-ankle-draft-ppd}
+
+This field is the \"ppredicted percentage of dissatisfied\" (PPD) on draft at ankle level. It is used as the metric to evaluate the ankle draft risk as a function of PMV and air speed at the ankle level (0.1 m). 
+
 \subsubsection{Outputs}\label{outputs-1-014}
 
 The following output variables are all based on whether the humidity ratio and the operative temperature is within the region shown in ASHRAE Standard 55-2004 in Figure 5.2.1.1. For these outputs the operative temperature is simplified to be the average of the air temperature and the mean radiant temperature. For summer, the 0.5 Clo level is used and, for winter, the 1.0 Clo level is used. The graphs below are based on the following tables which extend the ASHRAE values to zero humidity ratio.