Hydrodynamic numerical implementation for natural circulation boiler

A hot water boiler, natural circulation technology, applied in the direction of calculation, electrical digital data processing, special data processing applications, etc.

Inactive Publication Date: 2009-07-29
HARBIN INST OF TECH
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that this calculation method divides the heating surface of the boiler into several tube groups, assuming that each single tube in each tube group has the same heat load and structural parameters, and then performs hydrodynamic calculations for each tube group. Due to the limitation of the calculation...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrodynamic numerical implementation for natural circulation boiler
  • Hydrodynamic numerical implementation for natural circulation boiler
  • Hydrodynamic numerical implementation for natural circulation boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0043] 1. This method performs hydrodynamic calculation on the water wall circuit of the natural circulation hot water boiler, and the working fluid flow rate of each single tube can be obtained.

[0044] As an example, the water-cooled wall circulation loop of a natural circulation hot water boiler consists of a drum, a downcomer arranged at the end of one side of the distribution header, a distribution header, multiple parallel water-cooled wall risers, a collection header, and a The water circulation circuit diagram and hydrodynamic equivalent pipeline diagram of the water circulation circuit composed of the hot water outlet pipe at the end of one side of the tank are as follows: Figure 4 As shown, there are n independent loops, and the detour direction of each imaginary loop is set to be positive if the counterclockwise d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a calculation method for hydrodynamic numerical value of a natural circulation hot-water boiler. The method carries out a hydrodynamic equivalent calculation on single lines of the natural circulation hot-water boiler. A equations set is listed for the water circulation loop of the boiler on the base of that, in a pipeline network, a working medium flow flowing into any node certainly equals to the working medium flow flowing out of such a node and that the algebraic sum of working medium pressure differential of all pipelines in any loop equals to zero. The working medium flow can be obtained by resolving the equations set. The invention provides a hydrodynamic equivalent pipeline chart, a mathematic calculation equations set and relative resolution methods for water wall of the natural circulation hot-water boiler and the circulation loop of convection bank and introduces a calculation method and mathematical steps for the hydrodynamic operating points of a whole boiler. The adoption of the method has important meaning for guaranteeing the hydrodynamic safety of the hot-water boiler. As the method adopts computer numerical value for resolution, the calculation efficiency is improved obviously and the method can be used as the basic hydrodynamic calculation method of a thermal pipeline network and a hydrodynamic pipeline network.

Description

technical field [0001] The invention relates to a hydrodynamic numerical calculation method of a natural circulation hot water boiler Background technique [0002] Natural circulation hot water boiler has a series of advantages such as large water capacity and low operation level requirements, so it is widely used in our country. However, due to the relatively small density difference between the ascending pipe and the descending pipe of the natural circulation hot water boiler, the effective pressure head of the natural circulation is small. , so the hydrodynamic calculation of the hot water boiler must be carried out in the boiler design process. [0003] my country's current hot water boiler hydrodynamic calculations are based on JB / T8659-1997 "Hot Water Boiler Hydrodynamic Calculation Method". This standard provides the hydrodynamic calculation method for hot water boilers, which ensures the reliability of boiler water circulation. The disadvantage is that this calcul...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
Inventor 徐艳英董芃翟明
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap