Energy efficiency in civil engineering: analyzing world experience

Bezdenezhnukh, Tatiana; Kuritsyn, A.A.; Gimelshtein, Irina V.

doi:10.1051/matecconf/201821202009

MATEC Web Conf.

2018

DOI: 10.1051/matecconf/201821202009

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Energy efficiency in civil engineering: analyzing world experience

Tatiana Bezdenezhnukh

A.A. Kuritsyn

Irina V. Gimelshtein

Abstract: There are consistent trends in the development of energy-saving technologies in civil engineering in almost all countries of the world. The article considers the main approaches to ensuring energy efficiency in in civil engineering, analyzes the standards of energy-efficient construction in the world in general and in Russia in particular, and gives some recommendations on increasing energy efficiency in engineering.

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2024

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Analysis of the Thermal Regime of a Residential Building Premises after an Emergency Shutdown of the Heating System

Vafaeva,

Karpov,

Pavlov

et al. 2024

E3S Web Conf.

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Maintaining favorable microclimatic conditions in a residential dwelling is directly related to the stable operation of the heating system. An emergency shutdown of the heating system, especially in the winter season, can lead to serious negative consequences: disruption of thermal comfort for people in the residential building, rupture of pipelines and heating devices, flooding of adjacent premises, etc. Thus, the issue of predicting the thermal regime of a residential dwelling after the termination of heat supply is of practical relevance. The object of study: Residential premises in buildings. Subject of study: Patterns of change in the temperature of the indoor air (in dimensional and dimensionless forms), the rate of temperature drop, and the loss of thermal energy during an emergency shutdown of the heating system. Objective of the study: To forecast the thermal regime of a room in a residential building after an emergency shutdown of the heating system. Research methods: Classical theory of thermal stability of building enclosures; theory of regular thermal regime, according to which the temperature field at all points of the cooled body (in this case, the heating system) changes in the same way, obeying the exponential law; software computer calculations. Research results: In a room of a residential building, the indoor air temperature will reach the dew point (12.5 ℃) within 8 hours 42 minutes after an emergency shutdown of the heating system and zero value - after 23 hours 42 minutes. Based on the conducted scientific research, it can be stated that the thermal storage capacity of external enclosures, due to their design features, plays a primary role in preserving the thermal regime of a residential dwelling after the heating system is turned off.

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Analysis of the Thermal Regime of a Residential Building Premises after an Emergency Shutdown of the Heating System

Vafaeva,

Karpov,

Pavlov

et al. 2024

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

Investigation of the indoor air temperature in a civilian building after an emergency shutdown of the heating system

Karpov,

Pavlov,

Abramova

et al. 2024

Vestn. Dagest. gos. teh. univ., Teh. nauki

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Objective. An emergency shutdown of the heating system of a civil building will inevitably lead to a violation of the thermal regime in the heated rooms. Subsequently, this incident will have a negative impact on human thermal comfort and working conditions. Thus, the issue of predicting the thermal regime of a room in the event of a termination of the supply of thermal energy, along with the search for energy-saving technologies in the construction sector, is an urgent task.Method. Software calculations are based on the classical theory of thermal stability of a room in the case of intermittent heat supply and the law of regular thermal regime of the first kind (for a heating system), the essence of which is as follows: a decrease in temperature at all points of the body during its cooling occurs in the same way, obeying an exponential law.Result. For a room in a residential building, it is established that the indoor air temperature will reach the dew point (12.5 ℃) for a period of 8 hours 42 minutes after an emergency shutdown of the heating system, and the zero value after 23 hours 42 minutes. The average value of the rate of temperature drop over a period of 50 hours is 0.72 ℃⁄h, the total loss of thermal energy was 138.2 MJ. Conclusion. Thermal accumulation of enclosing structures plays a primary role for civil buildings in maintaining the required thermal regime of the room in the event of an emergency shutdown of the heating system. With a relatively low heat capacity and high heat transfer associated with the high temperature pressure of the heating elements, the cooling of the heating system occurs quite quickly (has a high cooling rate).

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Energy efficiency in civil engineering: analyzing world experience

Cited by 2 publications

References 4 publications

Analysis of the Thermal Regime of a Residential Building Premises after an Emergency Shutdown of the Heating System

Analysis of the Thermal Regime of a Residential Building Premises after an Emergency Shutdown of the Heating System

Investigation of the indoor air temperature in a civilian building after an emergency shutdown of the heating system

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