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A question from construction of psychrometric chart
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In summary, the conversation discusses a picture showing a wet-bulb temperature of 69 centigrade and its placement in relation to the saturation line at 100% humidity. There is confusion about the placement and the relationship between the two. It is clarified that the wet bulb and dry bulb temperatures are the same at 100% humidity and the depression is plotted on the psychrometer.
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SteamKing
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There's some sort of problem with the attachment.
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russ_watters
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The diagonal lines are constant wet bulb: so that's the label of the line it is next to.
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jim hardy
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Isn't it 69 degF not C ?mech-eng said:
It'd be placed vertically above the 69 on horizontal axis
because
at 100% humidity , wet bulb and dry bulb are the same ? And at any other humidity there's wet bulb depression ?
Remember what's going on on that psychrometer - moisture is evaporating, cooling the bulb. They're plotting that depression.
Related to A question from construction of psychrometric chart
1. What is a psychrometric chart?
A psychrometric chart is a graphical representation of the thermodynamic properties of air, including temperature, humidity, and pressure. It is used in the field of HVAC (heating, ventilation, and air conditioning) to analyze and design air conditioning systems.
2. How is a psychrometric chart constructed?
A psychrometric chart is constructed by plotting the values of dry bulb temperature (x-axis) and humidity ratio or specific humidity (y-axis) on a graph. The chart also includes lines of constant relative humidity, wet bulb temperature, and enthalpy, which are calculated using psychrometric equations.
3. What are the benefits of using a psychrometric chart?
Using a psychrometric chart allows engineers and technicians to quickly and accurately determine the properties of air and make informed decisions about air conditioning system design and operation. It also helps in identifying potential problems and troubleshooting existing systems.
4. How is a psychrometric chart used in air conditioning system design?
A psychrometric chart is used in air conditioning system design to determine the required air flow rate, cooling capacity, and dehumidifying capacity. It also helps in selecting the appropriate equipment and optimizing the system for energy efficiency.
5. Are there different types of psychrometric charts?
Yes, there are different types of psychrometric charts that are specific to different altitudes, atmospheric pressure levels, and temperature ranges. Some charts also include additional properties such as specific volume and relative humidity. It is important to use the correct chart for the specific conditions being analyzed.
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