Figure 7
The chart plots climate conditions from January through December as scattered points on a psychrometric graph. The horizontal axis is labeled “DRY-BULB TEMPERATURE, DEGREES CELSIUS” and ranges from negative 10 to 40 in increments of 5 degrees Celsius. The left diagonal axis is labeled “WET-BULB TEMPERATURE DEGREES CELSIUS” and ranges from negative 5 to 30 in increments of 5 degrees Celsius. The top axis is labeled “RELATIVE HUMIDITY” with markings including 80 percent and 100 percent, and curved relative humidity lines span the chart. The right vertical axis is labeled “HUMIDITY RATIO” and ranges from 0.004 to 0.028 in increments of 0.004. Strategy overlays include numbered shaded regions and guide lines intersecting the comfort zones and the climate point cloud. A text legend titled “DESIGN STRATEGIES: JANUARY through DECEMBER” lists: 1 “Comfort” 8.9 percent (779 hours); 2 “Sun Shading of Windows” 4.2 percent (368 hours); 3 “High Thermal Mass” 0 hours; 4 “High Thermal Mass Night Flushed” 0 hours; 5 “Direct Evaporative Cooling” 0 hours; 6 “Two-Stage Evaporative Cooling” 0 hours; 7 “Natural Ventilation Cooling” 0 hours; 8 “Fan-Forced Ventilation Cooling” 0 hours; 9 “Internal Heat Gain” 40.5 percent (3552 hours); 10 “Passive Solar Direct Gain Low Mass” 0 hours; 11 “Passive Solar Direct Gain High Mass” 15.3 percent (1342 hours); 12 “Wind Protection of Outdoor Spaces” 1.3 percent (117 hours); 13 “Humidification Only” 0 hours; 14 “Dehumidification Only” 1.2 percent (105 hours); 15 “Cooling, add Dehumidification if needed” 0 hours; 16 “Heating, add Humidification if needed” 0 hours. A summary line states “57.0 percent Comfortable Hours using Selected Strategies (4993 out of 8760 hours)”. A note below states, “Comfort Zones show: Summer clothing on right, Winter clothing on left”. A tilted comfort zone polygon appears near dry-bulb temperatures about 20 to 27 degrees Celsius and humidity ratio about 0.008 to 0.016, with an additional adjacent outlined zone. Strategy overlays include numbered lines and shaded regions, including a wind protection arrow labeled “12”, an internal heat gains region labeled “9”, and a vertical band labeled “14” and “2” extending upward toward wet-bulb temperatures about 25 degrees Celsius.Psychrometric chart showing the best design strategies and thermal comfort. Source: Authors' own work