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Beijing "residential building energy efficiency design standards" has been formally implemented! What is the impact on the doors and windows industry?
Release date:
2021-01-08
Author:
Source:
Ninth Five-Year Green Building Classroom
Beijing's "Design Standard for Energy Efficiency of Residential Buildings" was formally implemented on January 1, 2021, raising the energy saving rate of residential buildings in Beijing from 75% to more than 80%, marking a higher level of building energy efficiency.
Beijing's "Design Standard for Energy Efficiency of Residential Buildings" was formally implemented on January 1, 2021, raising the energy saving rate of residential buildings in Beijing from 75% to more than 80%, marking a higher level of building energy efficiency.
Part of revised content
· Overall energy saving target improvement:From the original 75% to more than 80%;
The thermal performance of the building envelope is improved, and the heat transfer coefficient standard of the outer window is greatly improved:
The heat transfer coefficient K value of external window, balcony door (window), curtain wall light transmission part and roof skylight "shall be no more than 1.1W/(m2 · K);
· implement the "dual control" principle,That is, both prescriptive and performance-based indicators must be met;
Energy consumption calculation method is different from the current standard, using dynamic calculation,And the energy consumption calculation kernel is the domestic dest3.0 kernel;
· Energy consumption indicators are divided into "current value" and "guide value":
All kinds of residential buildings are required to meet the "current value" index, key areas and buildings with higher requirements are required to meet the "guide value" index;
· Enhanced energy-efficient design requirements for heating, ventilation and air conditioning systems.
What does it mean for the window and curtain wall industry?
The provisions of this standard that have really attracted widespread attention in the curtain wall circle of doors and windows are3.2.2 The provisions on the K value of the heat transfer coefficient of the envelope,
And the standard stipulates:
When the K value index of the heat transfer coefficient of the door and window curtain wall cannot meet the requirements of this provision, the limit cannot be broken through the method of weighing and judging.
Simple provisions, but it has epoch-making significance. This is the reason why Beijing landmark 1.1 energy conservation has attracted widespread attention and discussion in the industry!
How does the business break?
According to statistics, Beijing implements the requirement that the K value of the heat transfer coefficient of doors and windows is lower than 1.1W/(m2 · K)It has reached the leading level among European countries.(See table below)
(Statistics in 2017)
Today, when building energy efficiency and green innovation technologies are constantly being respected, doors, windows and curtain walls, as a key part of achieving low-energy buildings, are gradually undergoing transformation and upgrading and technological innovation.
In the past 10 years, ultra-low energy consumption and near-zero energy consumption buildings have gradually become a local prairie fire from a single spark. Taking North China, where ultra-low energy consumption buildings are booming, as an example, Beijing, Hebei, Shandong, etc. The limit value of the heat transfer coefficient K value of the external windows of ultra-low energy buildings is determined to be 1.0W/(m2 · K).
With the official implementation of Beijing's "Energy-saving Design Standards for Residential Buildings" today, and the successive advancement of building energy-saving standards in various provinces and cities, super energy-saving, healthy and livable will become the future development trend.This is the high quality door and window curtain wall products, undoubtedly provides a more benign development space.
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