Method of measuring convection heat transfer coefficient of outer surface of building

A technology of convective heat transfer coefficient and outer surface, applied in the field of building heat transfer research, to achieve the effect of simple method and high accuracy

Inactive Publication Date: 2018-08-24
BEIJING UNIV OF TECH
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention designs a convective heat transfer coefficient measurement method and matching measuring equipment based on the naphthalene sublimation heat mass comparison experiment.

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 of measuring convection heat transfer coefficient of outer surface of building
  • Method of measuring convection heat transfer coefficient of outer surface of building
  • Method of measuring convection heat transfer coefficient of outer surface of building

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The test element is mainly composed of naphthalene specimen, pressure sensor, temperature sensor, thermocouple and other parts. A suction cup is placed on each of the four corners behind the pressure sensor, temperature sensor, and thermocouple test element, and the element can be fixed on the window through the suction cup.

[0030] The naphthalene test piece is a square box filled with naphthalene, 15cm long and 10cm wide. The surface of naphthalene is smooth and clean, and the non-measurement time is protected by the box cover. In order to ensure the measurement accuracy, during the measurement process, it is necessary to ensure that the sublimation quality of naphthalene is above 50mg within each weighing interval. After a large number of preliminary experiments, even in the most unfavorable natural environment The quality of naphthalene sublimation can also reach this value within 30 minutes under the same conditions.

[0031] The pressure sensor is used to measur...

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 of measuring convection heat transfer coefficient of the outer surface of a building belongs to the technical field of coefficient measurement and is based on naphthalene sublimation and heat-mass transfer analogy experiment; a corresponding measuring apparatus is also provided; mass transfer coefficient of naphthalene under certain conditions can be obtained by measuring sublimation rateof naphthalene; convection heat transfer coefficient under these conditions is acquired via heat transfer and mass transfer analogy. The method is simple to perform and has good results accuracy.

Description

technical field [0001] The invention belongs to the technical field of building heat transfer research. Specifically, it is a method for measuring the convective heat transfer coefficient of the building exterior. This method is based on the thermal-mass analogy theory. The measurement process is simple and convenient, the measurement equipment is light and reliable, and the measurement results are highly accurate. Background technique [0002] Measuring the convective heat transfer coefficient is an indispensable part of the process of determining building energy consumption, and its size is related to many factors such as the physical state and geometric arrangement of the fluid and heat transfer surfaces. Due to the many factors affecting the convective heat transfer coefficient, the variable control is difficult, the experimental process and data processing are quite cumbersome, and its measurement has always been problematic in engineering. [0003] The traditional mea...

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): G01N25/20G01N25/18
CPCG01N25/18G01N25/20
Inventor 谢静超刘京刘加平陈默崔亚平
Owner BEIJING UNIV 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