Overheating (chart 03) of pressu vapor region is slightly reduced: x2p= 1.18 | 1.25.
The power qup(chart 06) supplied by the walls to the pressu region is only important during the pressu voiding phase.
Later on, as the pressu refills, the contribution qyp of pressu heater becomes larger.
The contribution of interface exchange deserves more attention.
Note finally that the same heat exchange area sqxm was allocated to all equal volumes vuxm of pressu. Actually sqxm values should be augmented for the bottom and top nodes.