Method for determining actual heat consumption of steam extraction heat supply machine

A steam extraction heat supply unit, heat consumption technology, applied to calorimeters, heat measurement, instruments, etc., can solve the problems of low heat consumption accuracy and increased workload

Active Publication Date: 2012-09-12
HUADIAN ENERGY COMPANY LIMITED +1
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the actual heat consumption time cannot be obtained due to the fact that the actual steam extraction volume is not a specific steam extraction volume in the actual operation of the power plant, the present invention needs to do supplementary tests or art

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
  • Method for determining actual heat consumption of steam extraction heat supply machine
  • Method for determining actual heat consumption of steam extraction heat supply machine
  • Method for determining actual heat consumption of steam extraction heat supply machine

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0022] Specific implementation mode one: combine Figure 1 to Figure 3 Describe this embodiment, a method for determining the actual heat consumption of the extraction steam heating unit described in this embodiment, the parameters of the extraction steam heating unit are:

[0023] According to the steam turbine thermal performance assessment test regulations, the formula for calculating the heat consumption rate of the unit is:

[0024] H rt = F ms × H ms - F fw × H fw - F shsp × H shsp + F c...

specific Embodiment approach 2

[0039] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the specific process of the joint method of maximum likelihood estimation method and AIC criterion described in step 1 is:

[0040] Extraction steam for heating F cq Certain, independent variables are steam turbine power P, heat consumption H rt The relationship between the dependent variables is fitted; the independent variables are steam turbine power P, heat consumption H rt The relationship between the dependent variable is a polynomial model and the model error satisfies a normal distribution;

[0041] Dependent variable heat consumption H rti The relationship with the independent variable steam turbine power P is expressed by formula 3:

[0042] h rti =a 0 +a 1 P+a 2 P 2 +…+a n P n +ε i Formula 3

[0043] The parameter ε in Equation 3 i Indicates that the mean is zero and the variance is δ 2 A random variable with a normal distribution, denoted by ε i ~N(0,δ 2 ), para...

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

A method for determining actual heat consumption of a steam extraction heat supply machine resolves the problems of working amount increase in the operation process and low heat consumption accuracy caused by the process that compensation experiments or manual estimations are required to obtain actual heat consumption when actual heat consumption cannot be obtained due to the fact that actual steam extraction quantity is not specific steam extraction quantity in operation of a power plant. The method includes 1 conducting matching on relation between the heat consumption, turbine power and heat supply steam extraction amount; 2 selecting heat supply steam extraction amount; 3 changing the turbine power four times under each steam extraction amount; 4 obtaining heat consumption of each working condition point; 5, determining order of matching polynomial of the working condition points with the same steam extraction amount and conducting matching; 6 converting a coordinate system and conducting matching on the working condition points with the same power; and 7 obtaining heat consumption curve of any heat supply steam extraction amount according to the order of the matching polynomial. The method effectively reduces working amount, improves heat consumption accuracy and is suitable for a steam extraction heat supply machine set.

Description

technical field [0001] The invention relates to a method for determining the actual heat consumption of a steam extraction heat supply unit. Background technique [0002] During the actual operation of the generator set in the power plant, the heat consumption is an important indicator to measure the economy of the unit. In the actual operation process, the easiest and most effective way to obtain heat consumption is to query the heat consumption curve, which is of great significance to actual production. However, the unit heat consumption curve provided by the steam turbine manufacturer is often different from the heat consumption curve during the actual operation of the unit. Therefore, the power plant will pass tests in actual operation to determine the actual heat consumption curve of each unit. However, due to the test period Long, and the heat consumption curve can only reflect the relationship between several specific steam extraction volumes, power and heat consumpt...

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): G01K17/08
Inventor 刘金福胡宝权刘娇宋崇明张怀鹏李飞陈增吉李涛徐扬李树臣张修君左世春于达仁
Owner HUADIAN ENERGY COMPANY LIMITED
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