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Psychrometric properties of humid air: Calculation procedures

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  • Devres, Y. O.

Abstract

Knowledge of the psychrometric properties is essential during the designing of air conditioning, cold storage, and drying processes where humid air is a working fluid. In this study detailed procedures for calculating psychrometric properties are given. Seven main properties of the psychrometrics, namely dry-bulb, wet-buld and dew-point temperatures, atmospheric pressure, humidity ratio, relative humidity and enthalpy can be calculated using the given procedures. According to the Gibbs Phase Rule, in the humid air case, any three intensive properties will be sufficient to evaluate the remaining properties. Therefore the combination of three out of seven properties gives a total of 35 different sets. Computer software has been developed and utilised to obtain the psychrometric properties of humid air. It was found that given three input parameters, the remaining four parameters could, except in three cases, can be calculated with negligible error.

Suggested Citation

  • Devres, Y. O., 1994. "Psychrometric properties of humid air: Calculation procedures," Applied Energy, Elsevier, vol. 48(1), pages 1-18.
    • Handle: RePEc:eee:appene:v:48:y:1994:i:1:p:1-18
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    Cited by:

    1. Devres, Y. O. & Bishop, C. F. H., 1995. "Computer model for weight loss and energy conservation in a fresh-produce refrigerated store," Applied Energy, Elsevier, vol. 50(2), pages 97-117.
    2. Yago Fraga Ferreira Brandão & Leonardo Bandeira dos Santos & Gleice Paula de Araújo & Leonildo Pereira Pedrosa Júnior & Benjamim Francisco da Costa Neto & Rita de Cássia Freire Soares da Silva & Mohan, 2022. "Use of High-Frequency Ultrasound Waves for Boiler Water Demineralization/Desalination Treatment," Energies, MDPI, vol. 15(12), pages 1-17, June.

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