The steam drum is a cylindrical vessel arranged horizontally and manufactured from stainless steel with a length of 5.3 m, an outer diameter of 1.6 m, a volume of 7.4 m³ and a tare weight of 16.6 t. It is designed for pressures up to 10 MPa and temperatures up to 320 °C.
Altogether, the vessel is equipped with 17 nozzles. In addition to the flanges for the connection of the test section circuit, the safety valve, and the measurement technique, the steam drum provides a manhole for inspection purposes and a flange for installation of a bundle for condensation experiments in a later constructional stage of TOPFLOW.
During test section experiments with water/steam or water/air mixtures, the steam drum serves as phase separator. After phase separation, the gaseous phase flows to the blow off tank, where it condenses (steam) or is conducted into the environment (air).
In addition, the drum serves as a buffer tank for steam stabilization during the condenser experiments. Furthermore, the steam drum enables the pressure controlling in the test section circuit by bleeding of steam into the blow off tank. As well, the water level in the steam drum is controlled by bleeding and feeding of fully desalinated water into or from the blow off tank, respectively.
Steam drum with pipelines