Question

What are the components of a psychrometric chart? Explain in detail how you would find out enthalpy and water vapour pressure using a psychrometric chart

06 Mar 2026
Answer :
Word Count : 586
A psychrometric chart is a graphical representation of the physical and thermal properties of moist air, widely used in the design and analysis of energy systems in buildings. The chart integrates multiple properties of air, allowing engineers and designers to understand and manipulate air conditions for heating, cooling, ventilation, and humidity control. The main components of a psychrometric chart include dry bulb temperature, wet bulb temperature, relative humidity, specific humidity or humidity ratio, dew point temperature, enthalpy, and specific volume. The dry bulb temperature (DBT) is the temperature of the air measured with a standard thermometer and is plotted along the horizontal axis of the chart. It is called “dry bulb” because it does not account for moisture in the air. The wet bulb temperature (WBT) is measured using a thermometer with a wet wick and reflects the cooling effect of evaporation; on the chart, lines __________ __________ ___ _______ ___ _________ _________ _____ _________.
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