Methods of selection of the outdoor air design temperature and enthalpy in the warm period of the year

21st International Scientific Conference on Advanced in Civil Engineering "Construction - The Formation of Living Environment"

土木建筑工程

Malyavina, Elena^1 ; Malikova, Olga^1 ; Van Lyong, Pham^1

Moscow State University of Civil Engineering, Yaroslavskoye shosse, 26, Moscow

129337, Russia^1

关键词: Design temperature;    Environmental conditions;    Installation capacities;    Internal parameters;    Meteorological observation;    Meteorological station;    Outdoor environment;    Russian federation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/365/2/022057/pdf
DOI  :  10.1088/1757-899X/365/2/022057

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The RF requirements "Technical safety regulations of buildings and structures", with regard to the room microclimate, provide maintenance of the air temperature and relative humidity at the levels, which are comfortable for people living and accommodation therein. An important technological and economic role in designing of the systems of maintenance of the required thermal microclimate shall be attributed to the design parameters of the outdoor environment, as they affect the installation capacity of the systems aimed at maintaining the specified environmental conditions, the size of these systems and the area allowed to them in the building. The article proposes an approach to selection of the outdoor air design temperature and enthalpy of the warm period of the year, based on the year-to-year cumulated availability coefficient. Currently, the design values of each parameter are selected on the basis of a certain number of hours in an average multi-year time section, during which higher values of this parameter may be observed. This causes in some years a longer unavailability of the microclimate internal parameters and, importantly, deviations of actual values of these parameters from the calculated ones, leading to a prolonged discomfort of people who are present in the premises. To justify the proposed approach to the selection of the outdoor environment design parameters, provision has been made of processing the data of urgent meteorological observations got at the meteorological stations of Moscow and Hanoi over a period of 30 years. It has been shown, that in some years the duration of the temperature unavailability, instead of 200 hours per year, reaches up to 830h in Moscow and 418 hours in Hanoi, and instead of 400 h - 1130h in Moscow and up to 692 hours in Hanoi. The outdoor air enthalpy unavailability duration makes even more. The got results allowed to recommend for selection of the outdoor air design parameters in the warm period of the year the same approach, which is adopted in the Russian Federation for the winter period: the cumulated availability coefficients from year to year of 0.98 for unique and critical buildings and 0.92 for all other residential and public buildings.