Humid air is an unavoidable feature of mining atmosphere, which plays a significant role in defining the climate conditions as well as permitted circumstances for normal mining work. Saturated humid ...air prevents heat conduction from the human body by means of evaporation. Consequently, it is of primary interest in the mining practice to establish the relative air humidity either by means of direct or indirect methods. Percentage of water in the surrounding air may be determined in various procedures including tables, diagrams or particular calculations, where each technique has its specific advantages and disadvantages. Classical calculation is done according to Sprung's formula, in which case partial steam pressure should also be taken from the steam table. The new method without the use of diagram or tables, established on the functional relation of pressure and temperature on saturated line, is presented here for the first time (the paper is published in Croatian).
Vlažni zrak, kao neizbježna pojava u jamskoj atmosferi igra važnu ulogu, u definiranju klimatskih prilika i dopuštenih uvjeta okoline za normalan rad. Zasićenost zraka vlagom sprečava mogućnost ...odvođenja suvišne tjelesne topline procesom isparavanja, pa je zbog toga u rudarskoj praksi od izuzetnog značaja utvrđivanje relativne vlage, bilo direktnim ili indirektnim metodama.
Određivanje postotka vlage vrši se pomoću tablica, dijagrama ili proračunom, od kojih svaki navedeni način ima prednosti i nedostatke. .Klasičan proračun teče po Sprung-ovoj formuli, ali i u tom slučaju vrijednosti parcijalnih tlakova treba očitali iz tablica za vodenu para. Ovdje je prvi put prikazati novi način direktnog proračuna bez upotrebe tablica ili dijagrama, pri čemu se parcijalni tlakovi određuju na osnovu funkcionalne zavisnosti tlaka o temperaturi na graničnoj liniji.
Humid air is an unavoidable feature of mining atmosphere, which plays a significant role in defining the climate conditions as well as permitted circumstances for normal mining work. Saturated humid ...air prevents heat conduction from the human body by means of evaporation. Consequently, it is of primary interest in the mining practice to establish the relative air humidity either by means of direct or indirect methods. Percentage of water in the surrounding air may be determined in various procedures including tables, diagrams or particular calculations, where each technique has its specific advantages and disadvantages. Classical calculation is done according to Sprung's formula, in which case partial steam pressure should also be taken from the steam table. The new method without the use of diagram or tables, established on the functional relation of pressure and temperature on saturated line, is presented here for the first time. PUBLICATION ABSTRACT
