Abstract
Objective. In the case of a coupled supply of heat in a heat supply system, engineering structures act as a heat accumulator. Therefore, when calculating the premises cooling time in case of accidents in a heating network, it is necessary to take into account not only weather conditions, but also a decrease in the flow of heat from the heat supply system, since at low outside temperatures the heat loss in premises is greater than the heat supply, which will lead to the accumulation of moisture in materials of the structures. Methods. To build a model of internal conditions in premises when the heat supply system operates in emergency mode, the humidity potential theory was applied, which allows calculating the humidity mode of engineering structures under various non-periodic exposures. Results. A method for calculating moisture accumulation in outer walls of residential premises using the moisture potential theory is proposed. Conclusion. The impact of moisture accumulation on heat accumulation in outer walls and the dynamics of internal air temperature in premises under emergency conditions of the heat supply system operation has been determined.
Highlights
In the case of a coupled supply of heat in a heat supply system, engineering structures act as a heat accumulator
When calculating the premises cooling time in case of accidents in a heating network, it is necessary to take into account weather conditions, and a decrease in the flow of heat from the heat supply system, since at low outside temperatures the heat loss in premises is greater than the heat supply, which will lead to the accumulation of moisture in materials of the structures
To build a model of internal conditions in premises when the heat supply system operates in emergency mode, the humidity potential theory was applied, which allows calculating the humidity mode of engineering structures under various non-periodic exposures
Summary
ВЛИЯНИЕ ВЛАГОНАКОПЛЕНИЙ В НАРУЖНЫХ СТЕНАХ НА ТЕПЛОВОЙ РЕЖИМ ПОМЕЩЕНИЙ ПРИ АВАРИЙНОМ ТЕПЛОСНАБЖЕНИИ Т.А. При связанной подаче теплоты в системе теплоснабжения, строительные конструкции выполняют роль теплового аккумулятора. Поэтому при расчете времени остывания помещений при авариях в теплосети необходимо учитывать не только погодные условия, но также снижение поступления тепла от системы теплоснабжения, поскольку при низких температурах наружного воздуха потери теплоты помещениями будут больше теплопоступлений от системы теплоснабжения, что приведет к накоплению влаги в материалах конструкций. Для построения модели внутреннего режима помещений в аварийном режиме работы системы теплоснабжения применена теория потенциала влажности, позволяющая рассчитать влажностный режим строительных конструкций при различных непериодических воздействиях. Предложена методика расчета влагонакоплений в наружных стенах жилых помещений с применением теории потенциала влажности. Определено влияние влагонакоплений на тепловую аккумуляцию наружных стен и динамику температуры внутреннего воздуха помещений в аварийных условиях работы системы теплоснабжения. Ключевые слова: потенциал влажности, тепловой режим помещений, аварийное теплоснабжение. Novosibirsk State University of Architecture and Civil Engineering (Sibstrin), 113 Leningradskaya Str., Novosibirsk-8 630008, Russia
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