Example 04: Values from dry bulb temperature 'tdb' and wet bulb temperature 'twb'

Gallery
Tutorial
TRAIL: Air Conditioning Psychrometrics (vs CED Engineering course): Example results (only) in Mathematica and SysML using the Webel Psy package and MPsy class
Section
Topic level
BASIC
Keywords
Slide kind
plot
table
Example problem from:
CED Engineering course PDF: 'Air Conditioning Psychrometrics (A.Bhatia)'
Example question:
The dry bulb reading is 85°F and the wet bulb is 60F. Using the chart determine the following values. Using the chart determine the following values: Relative humidity; Dew Point; Absolute humidity; Specific volume; [Specific] enthalpy.
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The answers (where available) from the worked example problem are given in the 3rd column in the custom table in the top of the image in IP units.

Note that the values for relative humidity and absolute humidity as calculated via CoolProp are quite different from the provided course Answers

Below the custom table, the same values generated automatically by a Webel MPsy object (via the CoolProp wrapper for Mathematica) are shown, and then the state position on psychrometric charts in both °F and °C.

Up next
Example 05: Sensible heating: 'qSen' (+ve): energy transfer TO humid air
Notes
[COMPLICATION, GOTCHA, TIP]{INFORMATIVE} GOTCHA: Mathematica: Specific enthalpy conversion J/kg to Btu/lb: Does not consider a possible "total" enthalpy reference offset vs 0 °C or 0 °F respectively
[CONVENTION]{STRICT} Webel: Psy/MPsy: Psychrometrics for Mathematica: For Imperial Units (IP), International British Thermal Units (Btu) are assumed
[ASSERTION, GOTCHA, WARNING]{INFORMATIVE} In the course PDF for 'CED Engineering: Air Conditioning Psychrometrics (A.Bhatia)' the term "enthalpy (h)" usually refers to the mass-specific enthalpy per dry air (in CoolProp notation 'Hda')
Snippets (quotes/extracts)
 The dry bulb reading is 85°F and the wet bulb is 60F. Using the chart determine the following values. Using the chart determine the following values: Relative humidity; Dew Point; Absolute humidity; Specific volume; [Specific] enthalpy.
Visit also
CED Engineering course PDF: 'Air Conditioning Psychrometrics (A.Bhatia)'
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Related slides (includes other tutorials)
Related slides (backlinks, includes other tutorials)