In 2022, the proportion of newly built green buildings in Xuzhou, Jiangsu will remain 100%

Source: Jiangsu Net, China

High quality green buildings enhance energy efficiency

As an ultra-low energy consumption green building demonstration project in Xuzhou City, the overall building of Yunyuan Road Kindergarten in Yunlong District includes five green ecological elements, including thermal insulation, non thermal bridge design, air tightness, Dedicated outdoor air system, and renewable energy, which can provide a comfortable living environment with constant temperature, humidity, and oxygen throughout the year.

Our unique environment in this kindergarten has been widely recognized by parents. When encountering haze, high temperature, or severe cold weather, the kindergarten can close all doors and windows, creating an independent and healthy safety environment. With the help of a fresh air heat recovery system, the temperature in the classroom does not fluctuate much throughout the year, making the children feel very comfortable. "The relevant person in charge of the kindergarten introduced.

Ultra low energy consumption building refers to a building that adapts to climate characteristics and natural conditions, adopts efficient fresh air heat recovery technology, minimizes the demand for building heating and cooling, and makes full use of renewable energy to provide a healthy and comfortable indoor environment with less energy consumption by selecting an enclosure structure with higher thermal insulation performance and air tightness performance. Compared to ordinary buildings, passive low energy buildings have a longer service life and lower energy consumption requirements, reducing building energy demand and improving building energy efficiency.

Such green buildings benefit multiple parties. The kindergarten contractor commented, "For users, it provides a comfortable, quiet, clean, and low-cost activity space. For builders, providing a carrier for the upgrading of the building materials industry can win the high-quality construction market. From the perspective of its impact on the urban environment, it reduces the peak load of the city, alleviates the heat island effect, and reduces greenhouse gas emissions

Green buildings are high-quality buildings that save resources, protect the environment, reduce pollution, provide healthy, applicable, and efficient usage space for people throughout their entire lifecycle, and maximize the harmonious coexistence between humans and nature. Nowadays, in Xuzhou, the concept of green buildings is gradually deeply rooted in people's hearts. Under the guidance of institutional mechanisms such as green building evaluation standards, there are more and more green buildings around us, such as Yunyuan Road Kindergarten.

According to the data provided by Xuzhou Housing and Urban Rural Development Bureau, in 2022, the area of new green buildings in the city will be 23.4 million square meters, and the proportion of urban green buildings in new buildings will continue to maintain 100%, ranking first in the province, far exceeding the national average of 70%.

In addition to new green buildings, Xuzhou has vigorously promoted energy-saving renovation and renovation of old residential areas in terms of existing buildings. Renovating old residential areas not only improves the living environment of residents, but also contributes greatly to energy conservation. Many old residential buildings do not have insulation layers outside, and the windows are not well sealed, resulting in excessive energy consumption in the buildings themselves. The renovation of old residential areas increases the thickness of the external wall insulation layer of buildings, and adds insulation layers to the walls, forming a closed insulation system. While improving residents' living comfort, it also greatly reduces building energy consumption and saves expenses for residents.

Promoting green buildings is an important tool for building energy conservation. The "Implementation Plan for Carbon Peak in Urban and Rural Construction" proposed by the Ministry of Housing and Urban Rural Development proposes that by 2025, new urban buildings in China will fully implement green building standards, with a star rated green building proportion of over 30%, and new government invested public welfare buildings and large public buildings all reaching one star or more.

The relevant person in charge of Xuzhou Housing and Urban Rural Development Bureau said that in order to achieve the above goals, during the "14th Five Year Plan" period, Xuzhou will continue to promote the implementation of green building standards for new urban buildings, continue to carry out green building identification, continue to increase the proportion of star green buildings, and improve the level of building energy conservation through the research and application of new technologies, new products and new materials.

Promote the integrated application of renewable energy

Building energy efficiency should be a full lifecycle energy-saving approach, which involves not only building more green buildings and retrofitting existing buildings, but also saving energy during the use of the building.

The "Implementation Plan for Carbon Peak in Urban and Rural Construction" proposed by the Ministry of Housing and Urban Development proposes that the renewable energy substitution rate for urban buildings will reach 8% by 2025. Building solar photovoltaic integration, solar hot water systems, air source electric heat pump technology, and various waste heat utilization measures are all optional measures.

The roof of Xuzhou Junsheng Square is a photovoltaic integrated project, equipped with a solar photovoltaic power generation system and a solar hot water system. The solar photovoltaic panels are installed on the roofs of buildings 1 and 2 of Junsheng Square, covering a total area of 264 square meters. The photovoltaic installation capacity of Building 1 is 22 kilowatts, and that of Building 2 is 11 kilowatts. In addition, a solar hot water system has been installed on the roof of Building 3, with a total of 160 sets of solar collectors and a collection area of 460.8 square meters. The property manager of Junsheng Plaza evaluated the energy efficiency of the facilities and said that as a large energy user, the application of solar domestic hot water and solar photovoltaic power generation in large-scale public buildings such as Junsheng Plaza has greatly reduced building energy consumption.

Install photovoltaic exterior walls on the building surface, which usually have a service life of no less than 25 years. The "Implementation Plan for Carbon Peak in Urban and Rural Construction" proposed by the Ministry of Housing and Urban Rural Development aims to achieve a 50% photovoltaic coverage rate on the roofs of newly built public institutions and factories by 2025. According to the data provided by Xuzhou Housing and Urban Rural Development Bureau, in 2022, the application area of solar thermal buildings in Xuzhou will reach 6.4262 million square meters, and new technologies such as photovoltaic tiles and photovoltaic curtain walls will be widely promoted and applied.

Vigorously promoting "light storage, direct and flexible" buildings has also become a widespread consensus. The Xuzhou Garden Expo Park Duozhong Pavilion is a typical "light storage, direct and flexible" project. It is understood that the so-called "direct and flexible light storage" refers to the construction of distributed solar photovoltaic power generation systems within the building area; 'Storage' refers to the configuration of energy storage devices in the power supply system, which store surplus electricity during low electricity consumption periods and release electricity during peak electricity consumption periods; Direct "is a DC power supply system with simple form, easy control, and high transmission efficiency; 'Soft' refers to the flexible adjustment of building electricity demand based on the power generation situation of clean energy, enabling real-time matching between building electricity and clean energy power generation.

The development prospects of "light storage, direct and flexible" buildings are broad. The Action Plan for Carbon Peak before 2030 issued by the State Council clearly states that the electrification level of building terminals should be improved, and "light storage, direct and flexible" buildings should be built that integrate photovoltaic power generation, energy storage, DC distribution, and flexible electricity use. The "14th Five Year Plan for Technological Innovation in Urbanization and Urban Development" issued by the Ministry of Housing and Urban Development and the Ministry of Science and Technology also specifies that the basic theory, safety protection methods, and related standards of the "light storage, direct flexible" new power supply and distribution system will be studied.

Improving the utilization rate of renewable energy during the use of buildings has become an important measure to reduce carbon emissions. According to relevant national, provincial, and municipal requirements, this year the municipal housing and construction department will focus on optimizing the energy consumption structure of green buildings, promoting the integrated application of renewable energy in new buildings, encouraging the installation of renewable energy application systems in existing buildings, and increasing the proportion of renewable energy applications in new industrial factories and public buildings. Promote the comprehensive utilization of solar energy, shallow Geothermal energy, biomass energy, heat pump and other renewable energy in buildings according to local conditions, actively explore the application of "light storage, direct and flexible" technology in buildings, and promote the demonstration and application of distributed solar photovoltaic buildings. Promote the comprehensive electrification of new public buildings, eliminate direct combustion of coal and other materials at building terminals, encourage the use of renewable energy to achieve building heating (cooling), cooking, and hot water, and improve the electrification level of building terminals.

Prefabricated building realizes green and energy-saving construction

Energy conservation during the construction process is also an important aspect of building energy conservation. Developing Prefabricated building is an important part of promoting green construction.

The new energy heavy truck charging and changing power station located in Xuzhou Economic and Technological Development Zone is a novel Prefabricated building. The construction process of the charging and swapping power station used unit integrated modular technology, adopting industrial production and assembly construction methods. The entire construction process achieved short construction period, less labor, less materials, high assembly rate, high integration, rapid construction, removable turnover, and expandable characteristics. In addition, the project also integrates photovoltaic integrated roof design, which can provide green and clean energy for charging and exchanging power stations, reducing carbon emissions by about 40%.

In order to meet the modularization of large-span and large-space structures in charging and exchanging power stations, we propose the concept of unit integrated modularization, which enables the rapid construction of large-space buildings in charging and exchanging power stations, and can be dismantled, expanded, and reused. "Liu Xufeng, the person in charge of the construction party of the charging and exchanging power station, told reporters that the unit integrated module is completed in the factory and transported to the site for installation using a dry connection method, Significantly reduced on-site construction workload. At the same time, as a whole, the unit integrated module has good stability, which can effectively improve the overall stability of Modular building.

Prefabricated building has many advantages. It can not only shorten the construction period and reduce labor, but also reduce Construction waste emissions by 70%, save wood by 60%, save cement mortar by 55%, reduce water consumption by 25%, significantly reduce dust and noise pollution on the construction site, and improve building quality.

In recent years, Xuzhou has taken many measures to promote the high-quality development of Prefabricated building construction and application. At the stage of soliciting opinions on plot planning conditions, the municipal housing and construction department put forward requirements for Prefabricated building on 48 plots, including the plot on the west side of Woniu Mountain, and agreed that the area of Prefabricated building is about 3.56 million square meters; In the project scheme design stage, review the design guidance and guide 51 projects such as Quanrun Park East Block A to carry out Prefabricated building scheme design and construction drawing design; In the project construction stage, the quality and safety supervision during the construction of Prefabricated building shall be well done. In 2022, 5.31 million square meters of Prefabricated building will be newly constructed in the city.

The ground adopts modular quick installation heating, and the wall is hung with integral decorative panels. Various pipelines are hidden in the wall decorative panels... In newly built buildings, prefabricated decoration has a more obvious energy-saving and intensive effect, and the construction efficiency is increased by more than 30% compared to traditional decoration, which also solves the worries of maintenance.

The 14th Five Year Plan for the Construction of "Waste free City" in Xuzhou City issued by the Municipal Housing and Urban Rural Development Bureau clearly stated that full decoration delivery should be carried out to reduce the generation of decoration waste at the construction site. By 2025, the proportion of Prefabricated building in new buildings will reach 50%.

The relevant person in charge of the Municipal Housing and Urban Rural Development Bureau stated that during the 14th Five Year Plan period, they will actively carry out energy-saving and green transformation of existing buildings around the "dual carbon" goal, and improve the energy-saving standards of new buildings; Accelerate the development of zero energy, near zero energy, and ultra-low energy buildings. At the same time, in the construction of housing, we will also continue to explore and promote the new industrialization of housing, promote the application of prefabricated decoration in finished housing projects, promote the integration of housing design, construction and decoration, encourage real estate development enterprises to improve the housing construction standards, promote the application of new green materials, new technologies, new processes and new equipment, and accelerate the upgrading of housing industrialization and Digital transformation.

Extended Reading

What is green building?

According to the definition in the national "Green Building Evaluation Standards", green buildings are buildings that maximize resource conservation (energy conservation, land conservation, water conservation, and material conservation), protect the environment, reduce pollution, provide people with healthy, applicable, and efficient use spaces, and coexist harmoniously with nature throughout their entire lifecycle.

The entire life cycle of a building includes planning and design, building materials, construction, use, demolition, and disposal of waste building materials.

What are the standards for green buildings?

geographical conditions 

To ensure that there are no toxic or harmful substances in the soil where the building is located, the ground temperature is suitable, the groundwater is pure, and the geomagnetism is moderate.

building materials

The wood, bark, bamboo, stones, lime, paint, etc. used in buildings must be inspected and processed to ensure that they are harmless to human health.

Power generation device

According to geographical conditions, solar heating, hot water, power generation, and wind power generation devices should be installed to fully utilize the natural renewable energy provided by the environment.

What are the benefits for citizens?

Living more comfortably

The commercial housing that has obtained the green building operation label uses building materials that are harmless to the human body, allowing citizens to live more comfortably.

More economical water and electricity costs

Green buildings fully utilize the natural renewable energy provided by the environment, and living inside can significantly reduce water and electricity expenses.