Design and Development of Online Steam Dryness Fraction Measurement Setup

Abstract

The aim of study is to develop highly reliable and less time consuming steam dryness fraction measuring experimental setup. This method of dryness fraction measurement is based on throttling process which is obtained by using orifice plate. Calculation of orifice diameter was done by using ISO 5167 for given pressure drop. This paper deals with the conceptual design of orifice in a steam pipe line. The objective of the conceptual design is to obtain throttling process. Three parameters are chosen for the conceptual design: the diameter of the orifice, the aspect ratio between length and diameter and the entrance angle to the orifice. This work also deals with validation of calculated orifice diameter through CFD simulation for pressure drop in pipe line. To simulate the throttling process, the inlet condition of the orifice upstream flow is fixed at 10 bar and 180°C. The temperature and pressure is measured at the outlet of the orifice while steam is flowing through the pipe. An orifice diameter of 11.00mm is selected as the optimal value to keep throttling process. The resulting optimal orifice design will be used in steam pipe line.

Condenser Pressure Influence on Ideal Steam Rankine Power Vapor Cycle using the Python Extension Package Cantera for Thermodynamics

“… Steam quality (dryness fraction) at the exit of the steam turbine section and the inlet of the condenser section (x 4 ), as a percentage. The steam quality (or dryness fraction, or dryness) is the mass fraction of water vapor in a mixture of water vapor and liquid water [82][83][84]. The opposite (or complement) of steam dryness is steam wetness, which is the mass fraction of liquid water in a mixture of water vapor and liquid water [85][86].…”

An Online Fully-Automatic High Precision Monitoring System of Steam Dryness Based on Spectral Absorption Characteristics

“…3,4 The measurement of the dryness fraction of the stream indicates the overall efficiency. 5 Due to the need for more straightforward, rapid, and costeffective methods, integration of automatic analysis technology and traditional detection methods with the routine analysis. These include the Standard method for Mohr's manual titration to detect steam dryness.…”

“…However, this method is not suitable for online detection. Thermodynamic method, 5,7,8 the measurement of steam dryness can be realized with parameters such as steam pressure and feed water flow volume, which can realize automatic steam dryness detection. This process depending on too many parameters, affects its precision.…”