High-performance residential building fresh air volume design method

Abstract

The invention discloses a high-performance residential building fresh air volume design method which comprises the following steps: selecting a health relative humidity critical index based on healthrequirements; determining a province and a climate partition where the target high-performance residential building is located; selecting dehumidification measures of the target high-performance residential building by taking whether additional building dehumidification measures are taken as options or not; and determining different fresh air volume design schemes according to whether extra building dehumidification measures are taken or not. According to the invention, factors such as the high air tightness characteristic of a high-performance building, the healthy air humidity requirement, the humid environment risks of different building climate zones, the fresh air dehumidification capacity and the influence of the fresh air volume in different fresh air heat recovery modes on buildingcold and heat and dehumidification energy consumption are comprehensively considered; the optimization of the fresh air volume design scheme of the high-performance residential building based on thebuilding wet environment is realized, so the fresh air volume design scheme of the high-performance residential building is more reasonable and energy-saving, and the health of personnel can be betterprotected.

Description

technical field [0001] The invention belongs to the design field of building heating, ventilating and air-conditioning systems, and relates to a method for designing fresh air volume of high-performance residential buildings. Background technique [0002] When designing the HVAC system of a building, it is necessary to determine the fresh air volume index, that is, the fresh air volume design. If the fresh air volume index is too small, the indoor air quality will not be guaranteed; however, the larger the fresh air volume index, the greater the building cooling and heating energy consumption for the air conditioning system. Therefore, it is necessary to determine an appropriate fresh air volume index, so that the fresh air volume is large enough to ensure indoor air quality, but not too large to cause waste of energy. [0003] my country's building energy conservation work has been carried out so far, and high-performance buildings have been gradually promoted and applied....

AI Technical Summary

Problems solved by technology

[0005] It can be seen that due to the lack of research support on the building wet environment, the current design methods of fresh air volume for high-performance buildings are all based on the design standards of fresh air volume for conventional buildings , did not take into account that the airtightness of high-performance buildings is much higher than that of conventional buildings; nor did it take into account the requirements for indoor healthy air humidity, the difference in wet environment risks of high-performance buildings in different building climate zones, and the fresh air in different building climate zones. The difference in dehumidification capacity; under different forms of fresh air heat recovery, the comprehensive impact of fresh air volume on building cooling and heating energy consumption and dehumidification energy consumption is not fully considered

In high-performance buildings designed according to the current fresh air volume design method, the indoor air quality may be poor, and the indoor air humidity control may not be able to reach the level that ensures the health of personnel, and unnecessary energy consumption may also be generated

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