What amount of heat must be supplied per kilogram to produce steam at 375 kPa, having a dryness fraction of 96%?

To determine the amount of heat that must be supplied per kilogram to produce steam at a specified pressure and dryness fraction, it is essential to use thermodynamic principles related to steam and its properties as outlined in steam tables.

At a pressure of 375 kPa, the saturation temperature can be found in steam tables, along with the enthalpy values for saturated liquid (hf) and saturated steam (hg). The dryness fraction (x) indicates the proportion of steam in a mixture of liquid and vapor; therefore, the enthalpy of the steam can be calculated using the formula:

[

h = hf + x(hg - hf)

]

Where:

• (h) is the enthalpy of the steam.

• (hf) is the specific enthalpy of saturated liquid.

• (hg) is the specific enthalpy of saturated steam.

• (x) is the dryness fraction.

In this scenario, with a dryness fraction of 0.96, the calculation combines the enthalpy of the liquid and the enthalpy of the vapor to give a precise amount of heat per unit mass of steam produced. After performing these calculations using the specific enthalpy values from steam tables for 375 k