Problem 5 At an altitude of 1,600m, the atmospheric pressure is 81.49kPa. What is the specific humidity and relative hum
Posted: Wed May 04, 2022 1:10 pm
- Problem 5 At An Altitude Of 1 600m The Atmospheric Pressure Is 81 49kpa What Is The Specific Humidity And Relative Hum 1 (65.46 KiB) Viewed 60 times
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Problem 5 At an altitude of 1,600m, the atmospheric pressure is 81.49kPa. What is the specific humidity and relative humidity at this altitude when the dry and wet bulb temperatures are measured to be 10°C and 5°C respectively? Note, due to the low atmospheric pressure at 1,600m, the latm psychrometric chart is not valid for this problem. You will receive no points if you use it
ASHRAE standard 55, Thermal Environmental Conditions for Human Occupancy, notes that for thermal comfort purposes, the indoor temperature should range from approximately 67°F to 82°F (19.4°C to 27.8°C), and systems designed to control humidity must be able to maintain a dew-point temperature of 16.8°C (62.2°F). ASHRAE standard 62.1, Ventilation and Acceptable Indoor Air Quality, recommends that relative humidity in occupied spaces be controlled to less than 65% to reduce the likelihood of conditions that can lead to microbial growth. Determine the minimum allowable indoor temperature that will ensure a humidity control system designed according to ASHRAE standard 55 will also satisfy the humidity requirements of standard 62.1 Problem 7 The dry and wet bulb temperatures inside a 2500 ft² house with 8 ft ceilings are measured to be 75°F and 68°F respectively. How many gallons of moisture must be removed from the house by dehumidification to bring the humidity down to 65%, the ASHRAE 62.1 recommended maximum, while maintaining a dry bulb temperature of 75°F?