Air Temp & Pressure: Charts, Data Books & More

In summary, the conversation is about the availability of charts and equations to relate temperatures and pressures of air and its use as a refrigerant. The person mentions using compressibility factor and Wan Der Waal's Equations, while another suggests using data books or gas laws. A third person mentions using computer databases for fluid properties, with NIST REFPROP being a widely used option.
  • #1
RKD89
78
1
Hi guys
Can anyone tell me if there are charts available to relate temperatures and pressures of Air ( similar to steam tables )
Or do the ideal gas equations ( PV=nRT) hold true in practice as well

The most I could find is Compressibilty Factor on Wiki n Wan Der Waal's Equations


PS: Heard there are something known as Data Books
 
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  • #2
When air is Used as refrigerant , are there charts available to relate pressure n temp??
or I just Use d Gas Laws??
 
  • #3
The perfect gas law with compressibility factor determined from Wan Der Waal's Equations is how I always do it.
 
  • #4
In industry we typically use computer databases for fluid properties. Those databases generally interface with most engineering software. Our company has their own proprietary one as I'm sure many companies do. The one most widely used by companies that don't have their own is NIST REFPROP. You can purchase it online here:
http://www.nist.gov/srd/nist23.cfm
 

FAQ: Air Temp & Pressure: Charts, Data Books & More

What is the purpose of using air temperature and pressure charts?

Air temperature and pressure charts are used to record and analyze changes in atmospheric conditions over time. This data is crucial for understanding weather patterns and making accurate predictions.

How are air temperature and pressure measured?

Air temperature is typically measured using a thermometer, while air pressure is recorded using a barometer. These instruments can be manual or automated, and are often located at weather stations or on aircraft.

What units are used to measure air temperature and pressure?

Air temperature is commonly measured in degrees Celsius or Fahrenheit, while air pressure is usually recorded in units of millibars or inches of mercury.

How do air temperature and pressure affect each other?

Air temperature and pressure are closely related, with changes in one often leading to changes in the other. As air temperature increases, air molecules move faster and exert more pressure, causing a decrease in air pressure. Conversely, as air temperature decreases, air molecules slow down and exert less pressure, resulting in an increase in air pressure.

What are some common uses for air temperature and pressure data?

Air temperature and pressure data is used for a variety of purposes, including weather forecasting, aviation, and research in fields such as meteorology and climatology. It is also important in industries such as agriculture and energy, where accurate weather predictions can impact crop yields and energy production.

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