Study of changes indoor climate during a power failure heating system

Authors

Keywords:

Microclimate, construction materials, walling, thermal performance

Abstract

Purpose. In assessing the conditions for compliance with climate SDS 3.3.6.042-99 "Sanitary norms of microclimate of production rooms" one of the requirements to the parameters of a microclimate temperature of the inner surface of the enclosure. To ensure the regulatory parameters of the microclimate in buildings in the cold season running the heating system. At the same time, as international experience shows in Ukraine has not yet resolved the issue of energy savings that lead to unnecessary use of coolants without temperature indoors and the heat loss through the building envelope. Therefore, it became necessary to carry out studies of temperature changes on the inner surfaces of the premises upon cooling due to the shutdown of the heating system, which allows to assess the compliance of the microclimate in the room with sanitary norms and, if necessary, manage the process and ensure the maintenance of its parameters.

Methodology. Theoretical and experimental studies were carried out on the basis of fundamental knowledge in the field of thermal processes and techniques for solving problems of heat transfer, modeling of dynamic processes, methods and analysis of random processes, methods of mathematical statistics and forecasting.

Findings. Based on these studies and the obtained values of the temperature dependence of the internal surfaces of enclosures form the basis of assessment of cooling the inner surface of the walls, which can be used to estimate the indoor climate in unsteady operation.

Originality. The studies found that in the process of environmental influences and climatic conditions for long term use in structures due to structural changes (compaction, alteration mineralogical composition, carbonation, moisture migration, etc.) there are significant changes in thermal characteristics of the original, which reduces their thermal resistance and significantly affect the provision of normal conditions of indoor climate (change of thermal conductivity in the direction of increasing from 20.7% to 48.6%).

Practical value. Studies changing thermal properties of building materials walling calculation and experimental methods showed a high convergence of their (the error does not exceed 5%), which allows the use of the proposed experimental method for rapid assessment of thermal properties of building materials walling.

Author Biographies

A. S. Belikov, Department of life safety, State Higher Education Establishment "Pridneprovsk State Academy of Civil Engineering and Architecture"

Department of life safety

I. Kolesnik, Department of life safety, State Higher Education Establishment "Pridneprovsk State Academy of Civil Engineering and Architecture"

Department of life safety

References

Banhidi L. Teplovoy mikroklimat pomeshcheniy: Raschet komfortnykh parametrov po teplooshchushcheniyam cheloveka [Thermal indoor climate: Calculation of comfort parameters Teploobmennik man] / Trans. with hung. V. M. Belyaev; Under.

Bogoslovsky V. N. Building thermal physics (thermal fundamentals of heating, ventilation and air conditioning): proc. for universities 2nd ed., Perera. and extra. – Moscow: Higher school, 1982. – 415 p.

Demin O. B. Fiziko-tekhnicheskiye osnovy proyektirovaniya zdaniy i sooruzheniy : ucheb. posob. [Physical and technical bases of designing of buildings and structures: proc. p.] – Tambov: The Compromise. state technical. University press, 2004. – P. 2. – 84 p.

Zakharenko, I. M., Goncharenko N. I. Vozdeystviye okruzhayushchey sredy na konstruktsii zdaniy i sooruzheniy [The impact of environment on design of buildings and structures] / Bulletin KTU. - Krivoy Rog: SIHE "Krivorzhstal national University", 2011. – Vup. 28. – S. 3 – 7. – Access mode: http://knu.edu.ua/Files/V_28_2011/18.pdf.

Kama F. M. Pulse theory of thermal conductivity. – Moscow: Energiya, 1972. – 271 p.

Kozlov V. P., Stankevich A. V. Metody nerazrushayushchego kontrolya pri issledovanii teplofizicheskikh kharakteristik tverdykh materialov [NDT Methods in the study of thermophysical characteristics of solid materials] // Ing. Fiz. zhurn. – 1984. – T. 47. – №. 2. – P. 250 – 252.

Kondrat'ev G. M. Regular thermal mode. – Moscow: Nauka, 1964. – 487 p.

Kondrat'ev G. M. Thermal measurements. – Moscow – Leningrad: Mashgiz, 1956. – 253 p.

Korotkov P. A., London, G. E. Dynamic contact measurement of thermal variables. – Leningrad: Mashinostroenie, 1974. – 222 p.

Mishchenko S. V. Analysis and synthesis of the measurement systems / S. V. Mishchenko, Yu. L. Muromtsev, I. E. Tsvetkov, V. N. Chernyshov. – Tambov: The Compromise. state technical. University, 1995. – 238 p.

Platunov E. S., etc. Thermal measurements and instruments. – Leningrad: Mashinostroenie, 1986. – 256 p.

Platunov E. S. Thermophysical measurements in the monotone mode. – Leningrad: Energiya, 1973. – 143 р.

Fokin K. F. Building heating equipment protecting parts of buildings / edited by J. A. Tabunshikova, V. G. Gagarin, 5th ed., revision. – Moscow: AVOK-PRESS, 2006. – 256 p.

Shashkov A. G. Methods for determining thermal conductivity and thermal diffusivity / A. G. Shashkov, G. M. Volokhov, T. N. Abramenko, V. P. Kozlov. – Leningrad: Energiya, 1973. – 242 р.

Shlykov, Y. P., Garin, E. A. Contact heat exchange. – Moscow – Leningrad: Energiya, 1963. – 144 p.

Schneider P. Engineering problems of heat conduction. – Moscow: Publishing house of literature, 1960. – 478 p.

Yaryshev N. A. The theoretical basis for the measurement of transient temperatures. – Leningrad: Energiya, 1967. – 298 p.

Published

2015-09-22

Issue

Section

Energy, ecology, computer technology in construction