How should the vaporization heat of water vapor be determined?
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I read in a book on calculating the calorific value of gases that the latent heat of vaporization of water vapor in gases is given as 2352 kJ/kg, while according to a steam property table, the latent heat of vaporization of water at 100 degrees Celsius is 2257 kJ/kg. And 2352 kJ/kg corresponds to 65 degrees. I want to know which value to use when calculating gas usage
At 0 degrees, the latent heat of vaporization of water vapor is 2500 kJ/kg, which also does not match.
To get accurate results, collect more data and fit curves to determine the average value. For the temperature range you mentioned, you can simply take the average of the temperatures at the highest and lowest points; this will definitely achieve the accuracy you need.