Field testing equipment and method for heat transfer coefficient of building envelope

Abstract

The invention discloses an on-site testing device for the heat transfer coefficient of a building enclosure structure, which includes a main part of the device and a data acquisition and processing part; the main part of the device includes: a first auxiliary test material board, a second auxiliary test material board, and a first temperature sensor , a second temperature sensor and a third temperature sensor; the data acquisition and processing part includes: data acquisition equipment and a computer, based on the one-dimensional heat conduction differential equation inside the multi-layer material, the analytical solution to the heat transfer coefficient is realized. Also disclosed is a field testing method for the heat transfer coefficient of the building enclosure structure. The equipment is simple in structure, easy to carry and easy to install. The test site can be flexibly selected according to the needs. The comprehensive heat transfer coefficient of the test enclosure structure can be measured more accurately in a short period of time, and the test site can be flexibly heated. The test results are not affected by the external temperature; secondly, the calculation program of this test method is based on the basic heat conduction equation, which has small programming difficulty and small calculation error.

Description

technical field [0001] The invention relates to the field of building performance testing, in particular to an on-site testing device and method for heat transfer coefficient of building envelope structures. Background technique [0002] As a major source of power for the continuous development of human society, energy has always been a topic of constant discussion and research. In today's environment where all walks of life in the world continue to move forward, energy has gradually begun to take off in the process of global steady development. There is a constraint, and the impact of this constraint is growing. As we all know, building energy consumption occupies a considerable share in the total energy consumption of the society from beginning to end, and building energy conservation is the key to solving the global energy shortage in the future and realizing CO2 in various countries. 2 Therefore, the topic of building energy efficiency is becoming more and more serious ...

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Problems solved by technology

However, these methods have more or less limitations. The hot box method is mainly used for laboratory testing and research. Because the equipment is not easy to install and the cost is high, it is not easy to use for field testing.

Although the heat flow meter method is the preferred method of the national standard, it is also an internationally recognized method, but the premise of the field test of this method must be the heating period, which is strongly affected by the season. The temperature control box-heat flow meter method combines the advantages of the two to a certain extent. Combination is a relatively excellent on-site detection method, but the heat transfer coefficients tested by different equipment produced by different companies have deviations, and there is a gap of 10% to 25% in the results, and the test time is long, and it takes a long time to obtain The heat transfer coefficient of the tested enclosure structure

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