Balcony-Mounted Solar Project In Zhangbei Sino-German Asian Games Village, Hebei

Balcony-Mounted Solar Project in Zhangbei Sino-German Asian Games Village, Hebei

1. Project Background: Driven by Both Policy Orientation and Regional Needs

In 2020, Zhangjiakou, Hebei Province, was in a crucial stage of deepening the implementation of the Beijing - Tianjin - Hebei Coordinated Development Strategy and accelerating the construction of a renewable energy demonstration zone. As the co - host city of the 2022 Beijing Winter Olympics, Zhangjiakou had previously defined the development orientation of "green and low - carbon" and vigorously promoted the popularization and application of clean energy in the field of people's livelihood. Zhangbei County, as a core area of renewable energy in Zhangjiakou City, is rich in wind and solar energy resources. At that time, it was actively exploring the integrated model of "new energy + residential supporting facilities" to improve the quality of residents' lives and contribute to the early practice of the "dual carbon" goal.

The Sino - German Asian Games Village Project, as a key livelihood housing project in Zhangbei County, aims to build a modern community integrating residence, ecology and energy conservation. Considering the climatic characteristics of Zhangbei, such as cold winters and high heating demand, as well as the actual needs of residents for the utilization of clean energy, the project developer decided to introduce balcony - mounted solar water heating systems. This technology not only conforms to the national policy orientation of "energy conservation and emission reduction", but also is fully compatible with the building structure of residential buildings in northern China. At the same time, drawing on Germany's mature experience in the application of renewable energy, it realizes the combination of "local adaptation + international technology" and provides a stable and environmentally friendly domestic hot water solution for community residents.

2. Core Project Parameters: Precise Planning of Scale and Layout

1. Basic Project Information

Implementation Time: Throughout 2020 (covering the whole cycle of scheme design, equipment procurement, installation and commissioning, acceptance and delivery), and all systems were put into use and residents were trained by the end of 2020.

Project Location: Sino - German Asian Games Village Community, Zhangbei County, Zhangjiakou City, Hebei Province. The community is located in the core area of Zhangbei County, with complete supporting facilities such as schools, shopping malls and medical facilities around it. It is one of the high - quality residential communities focused on building in the local area.

Coverage Scale: The project serves a total of 4,747 households in the community, covering various building types such as high - rise residential buildings and multi - storey houses. The total number of households accounts for 100% of the total residential households in the community, realizing the full coverage of "one system per household". It was the largest balcony - mounted solar water heating project in a single community in Zhangbei County at that time.

2. Technology and Equipment Layout

To adapt to the balcony structures of different house types, the project adopts the mode of "customized design + standardized installation": For high - rise residential buildings, inclined balcony - mounted solar collectors are selected, which fit the curvature of the building facade and avoid affecting the architectural appearance and residents' lighting; For multi - storey houses, horizontal collectors are used, matched with high - efficiency heat preservation water tanks to ensure thermal efficiency in the low - temperature environment in winter. At the same time, each household's system is equipped with a dual mode of "solar energy + auxiliary electric heating". In case of continuous rainy weather, it can automatically switch to auxiliary heating to ensure 24 - hour hot water supply and solve the problem of unstable solar energy utilization in northern winter.

3. Project Implementation Effects: Dual Improvement of Livelihood Benefits and Ecological Value

1. Significant Improvement in Residents' Quality of Life

After the project was put into use, 4,747 households completely got rid of the problems of "frequent maintenance of gas water heaters" and "high energy consumption of electric water heaters". They can enjoy stable constant - temperature hot water in daily life. Moreover, the cost of hot water use is reduced by about 60% compared with the traditional gas mode, saving each household an annual energy expenditure of 500 - 800 yuan. In addition, the system adopts intelligent control, and residents can check the hot water temperature and remaining water volume in real time through a mobile APP, which greatly improves the operation convenience and has won wide praise from community residents.

2. Outstanding Green and Low - Carbon Benefits

Calculated based on 150 liters of hot water used per household per day and the thermal efficiency of traditional gas water heaters of 85%, 4,747 households need to consume about 1.26 million cubic meters of natural gas throughout the year; However, the average solar energy guarantee rate of the balcony - mounted solar system reaches 70%, which can replace about 882,000 cubic meters of natural gas throughout the year and reduce carbon dioxide emissions by about 2,300 tons (calculated according to the carbon dioxide emission coefficient of 2.6 tons per 10,000 cubic meters of natural gas combustion), which is equivalent to the carbon sequestration capacity of planting 128,000 trees. It provides a "livelihood application sample" for the construction of Zhangbei County Renewable Energy Demonstration Zone.

3. Profound Demonstration Significance for the Industry

This project is a typical case of Sino - German cooperation in the field of clean energy for people's livelihood. Its "technology adaptation scheme based on local conditions" and "large - scale application mode covering the whole community" provide replicable experience for the promotion of solar water heating systems in residential buildings in cold areas of northern China. In 2021, the project was listed as a "Green Building Demonstration Project" by the Department of Housing and Urban - Rural Development of Hebei Province, attracting on - site inspections and studies by housing and urban - rural development departments and real estate enterprises in many places, and promoting the standardized development of residential clean energy supporting facilities in Hebei Province and even the Beijing - Tianjin - Hebei region.

4. Support System Behind the Project

To ensure the smooth implementation and long - term stable operation of the project, the developer has established a "full - cycle service system": In the early stage, it jointly conducted climate adaptability tests with the German technical team, optimized the heat - absorbing coating of the collector and the material of the heat preservation water tank to ensure that the system can withstand the extreme low temperature of - 30℃ in Zhangbei winter; During the construction stage, a professional installation team was set up to construct in strict accordance with the Technical Code for Application of Solar Water Heating Systems in Civil Buildings. After the installation of each household's system, pressure tests and thermal performance tests were carried out, with a 100% acceptance rate; In the later operation and maintenance stage, a community service station was set up to provide 24 - hour fault repair services, and regular on - site system cleaning and pipeline inspection were conducted to ensure the service life of the system is more than 15 years, completely solving the "worries" of residents.