| 摘要 |
<p>An electrically heated steam quality measurement device (12) which includes a steam inlet (22), a high wall density cartridge heater element (46), an outer tubular housing (36), a pressure sensor (62, 64), temperature sensors (52, 54) flow measurement device (60), steam outlet (68), and a microprocessor based electronics readout device and controller (18). A steam sample of unknown steam quality is extracted from a fossil or nuclear power plant piping system (20)and directed through this device. A globe valve (66) downstream of this unit may be adjusted to ensure that the steam flow through the unit is adequate to ensure that an iso-kinetic steam sample is being acquired. The controller adjusts the power input to the heater to achieve superheated steam at the outlet in the range of 50 DEG to 100 DEG F. The readout device continually monitors the mass flow of superheated steam, inlet and outlet steam temperatures, and power input to the heater. With this information the steam quality is calculated using conventional engineering equations and displayed continuously.The information can also be transmitted to a computer for further calculations and storage.</p> |
