포화증기의 온도/압력 Steam pressure/Volume relationship
{"Image DocumentName": "\ud3ec\ud654\uc99d\uae30\uc758 \uc628\ub3c4/\uc555\ub825 Steam pressure/Volume relationship", "Image ImageDescription": "\uc555\ub825 (bar g) \uc628\ub3c4 (\u2103) Steam pressure/Volume relationship. The density r of a substance is mass (m) per unit volume (V) of the substance. The specific volume v, is the volume per unit mass and is therefore the inverse of density. Its units are m?kg or dm?kg where 10\ucfedm?kg = 1m?kg. Hence: Considering the molecular structure of liquids and vapours we would expect the density of steam to be much smaller than that of water because the steam molecules are more widely separated from one another, and at typical atmospheric conditions the densities of water and steam are respectively 1000 kg/m?and 0.6 kg/m? This enormous difference is appreciated if a kettle of water is left to boil, the resulting steam soon fills the entire room. As the steam pressure increases the density of the steam increases, and inversely the specific volume will of course decrease. If we refer to the steam tables and plot the specific volume against the steam pressure we will produce a curve as shown in the slide which highlights the fact of a sharp rise in specific volume as the pressure falls below 6 Bar g.", "Image XResolution": "500", "Image YResolution": "500", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}