Calculating Thermo Properties of Water in Excel

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SUMMARY

This discussion focuses on calculating the enthalpy of subcooled water using Excel for thermal hydraulic code verification. The user has approximately 1000 data points of temperature (T) and pressure (P) but finds the manual lookup for enthalpy tedious. A recommended solution is to utilize REFPROP, a database of thermophysical properties that integrates with Excel, allowing users to retrieve fluid properties efficiently through specific codes.

PREREQUISITES
  • Understanding of thermal hydraulic principles
  • Familiarity with Excel functions and formulas
  • Knowledge of enthalpy and its significance in thermodynamics
  • Basic understanding of fluid properties and their correlations
NEXT STEPS
  • Research how to implement REFPROP in Excel for thermophysical property retrieval
  • Explore alternative methods for calculating enthalpy in Excel
  • Study the correlations between temperature, pressure, and enthalpy for subcooled water
  • Investigate other databases similar to REFPROP for thermodynamic calculations
USEFUL FOR

Researchers, engineers, and students involved in thermal hydraulics, particularly those needing efficient methods for calculating fluid properties in Excel.

traijan
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Hi - I am currently working on a paper verifying some thermal hydraulic code against experimental test data for subcooled water subchannel flow. I have close to 1000 points in excel all listed with T & P and the process for inputting the corresponding enthalpies for subcooled water by lookup table is dreadfully slow (the code requires the enthalpy - no built in look up table) Does anyone have any advice for correlations or calculations I can input to excel to perform the enthalpy calcs? Thank you!
 
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I don't understand what you are asking. What exactly takes time (and is it your time or computation time) and how do you want to reduce that?
Correlations between what, calculations for what, based on what?
 
traijan said:
Does anyone have any advice for correlations or calculations I can input to excel to perform the enthalpy calcs? Thank you!
Perhaps REFPROP would help. It's a database of thermophysical properties that can be accessed by Excel. It has a lot more than water in it, but it's not particularly expensive. Basically, you put a specific code into the cell similar to a lookup function and it brings back some property of the fluid you're looking for such as enthalpy (or density, entropy, etc...). There's a list of properties on the web site.

You can research it and purchase it online here:
http://www.nist.gov/srd/nist23.cfm
 

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