Estimation of the Minimum Temperature on Translucent Structures According to Field Measurements

The problems of determining (forecasting) the minimum surface temperature of enclosing building structures under design conditions are considered. It has been established that the currently used calculation methods for determining the main thermal characteristics of enclosing structures – the reduced resistance to heat transfer and the temperature of the inner surface, often significantly overestimate the desired values, and the conditions for conducting a full-scale experiment develop every few years. A combined computational-experimental method for determining the temperature of the inner surface of external enclosing structures is proposed, based on predicting the surface temperature of the enclosing structure based on the results of calculation using the similarity formula for statistical data arrays of temperature measurements taken in natural conditions on the test structure. On the example of testing a typical window unit installed in a building under construction at the time of measurements in Moscow, a methodology for the implementation of a full cycle of work to determine (predict) the minimum temperature of a window profile under design conditions is outlined. The basic requirements for the conditions of work, measuring instruments, sensor installation locations, measurement duration, and processing of results are described. Additionally, issues related to the factors affecting the measurement and calculation errors are considered. The performance of work to determine (predict) the minimum temperature of the inner surface of the building envelope according to the above method, in combination with tests to determine the reduced resistance to heat transfer, makes it possible to assess the compliance of the thermal parameters of the tested structure according to two of the three most important criteria, normalized by SP 50.13330–2012 (with Amendment No. 2).

I.S. KURILIUK¹, Leading Engineer , (This email address is being protected from spambots. You need JavaScript enabled to view it.);
S.I. KRYSHOV², Candidate of Sciences (Engineering)

¹ Scientific-Research Institute of Building Physics of RAACS (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)
² Center for Expertise, Research and Testing in Construction (GBU “TSEIIS”) (13, Ryazansky Avenue, Moscow, 109053, Russian Federation)

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