Method for querying state parameters of water and steam

Abstract

A method for querying state parameters of water and steam is used for calculation for a power plant and comprises Excel software. The method is characterized by establishing four work tables including a water and superheated steam work table, a saturated water and saturated steam pressure work table, a saturated water and saturated steam temperature work table and a water and steam state parameter query work table in an Excel workbook. Data of the water and superheated steam work table, the saturated water and saturated steam pressure work table and the saturated water and saturated steam temperature work table are added to each column. Columns of actual pressure, actual temperature, saturated temperature and steam dryness are established in the water and steam state parameter query work table. In addition, columns of work medium state, capacitance, enthalpy and entropy in a work medium thermal parameter and capacitance, enthalpy and entropy in a water thermal parameter are established in the water and steam state parameter query work table. The data in the water and superheated steam work table, the saturated water and saturated steam pressure work table and the saturated steam temperature work table are pasted to the water and steam state parameter query work table after being copied, all state parameters of the work medium under the temperature corresponding to the given pressure, and automatic thermal calculation is achieved by adding the state parameters to thermal calculation.

Description

Technical field [0001] The invention belongs to the operation field of thermal energy power system of power plant, and is mainly used for calculation of thermal energy efficiency of power plant. Background technique [0002] In order to operate efficiently and economically, power plants must grasp the various efficiencies of boilers and steam turbines at all times, and efficiency analysis cannot do without thermal calculations. The specific volume, enthalpy, entropy and other state parameters of water and steam are used in thermal calculations, and the query of various state parameters is very cumbersome. For simple thermal processes, or thermal analysis calculations that do not count time are possible. For the power plant production system, the workload of thermal calculation is very large. For example, it is very difficult to track a thermal process in real time, and it is almost impossible to analyze its efficiency. Although there is now a steam state parameter search softwa...

AI Technical Summary

Problems solved by technology

Although there is now a steam state parameter search software, it is still very inconvenient to manually copy and enter each parameter when the amount of data is large