Huazhang Xinzhu Project, Shenzhen

Longhua District, Shenzhen / Residential Building

2025 First Batch of Ultra-Low Energy Consumption Pilot Projects

Source | Shenzhen Housing Authority

 

 

Recently, the Shenzhen Municipal Housing and Construction Bureau announced the city's first batch of ultra-low energy consumption buildings and near-zero carbon buildings pilot projects for 2025. Huazhang Xinzhu successfully passed the ultra-low energy consumption building review and became the only residential project among the city's seven pilot projects.

 

Huazhang Xinzhu is located at the intersection of Guanhu Banlan Avenue and Xinzhang Road in Longhua District, with a land area of approximately 24,000 square meters, a total construction area of approximately 173,000 square meters, a building height of approximately 100 meters, and a green coverage rate of 40.03%. The project consists of five residential towers and 6,028 concrete modules. It adopts a "standardization + industrialization + digitalization + intelligence + green" solution, completed and delivered in just 365 days, and can provide 2,740 units of affordable rental housing.
 

 

Units ABC of Building 1, and Buildings 2 and 3 of the Huazhang Xinzhu project are ultra-low energy consumption building pilot projects, with a construction area of 124,200 square meters.

 

 

The project's architectural design fully considers passive measures such as natural ventilation, natural lighting, building external shading, and building insulation and heat insulation; in terms of electromechanical systems, it uses high-efficiency air conditioning, energy-efficient LED lighting, and energy-efficient elevators; in terms of renewable energy applications, solar photovoltaic systems are installed on the roof, and a "photovoltaic storage direct flexible" system is used to reduce the project's reliance on traditional energy, achieve energy saving and carbon reduction goals, and can be promoted to the whole society as a demonstration building for energy saving and carbon reduction in summer-hot and winter-warm regions.

 

01 Natural Ventilation
 

The building orientation follows the site's prevailing wind direction, while optimizing the building space and layout. Bedrooms are equipped with open balconies, and the effective ventilation area of the inner and outer windows accounts for 12.18% to 15.84% of the floor area of the unit type, providing favorable conditions for natural ventilation indoors.

 

Building Shading
 

Mainly through balconies to form self-shading, some rooms are equipped with external shading, and all exterior windows use double-glazed LOW-E glass to further reduce room solar radiation heat gain.

Building Insulation and Heat Insulation
 

The roof uses extruded polystyrene foam, the exterior walls use water-based nano-hollow glass microsphere insulation and heat insulation materials, and the exterior windows use thermal break aluminum alloy windows + Low-E double-glazed glass to reduce the air conditioning cooling load caused by the indoor and outdoor temperature difference.

 

 

Through the above passive technical measures, the indoor air conditioning load and energy consumption time are reduced. On this basis, active energy-saving measures are further applied, including the use of energy-efficient LED lighting and energy-efficient elevators.

 

Energy-Efficient Elevator Application
 

Energy-efficient elevators that meet the A-level energy efficiency of VD14707 in the "Elevator Energy Efficiency Standard" are used.

Renewable Energy
 

Mainly through the application of technologies such as distributed photovoltaic on residential rooftops, photovoltaic + parking lot ultra-fast charging piles, intelligent energy storage, and V2G intelligent charging and discharging, photovoltaic green electricity reduces building energy consumption, energy storage peak shaving and valley filling reduces peak electricity consumption and reduces pressure on the power grid, and the all-liquid-cooled supercharging system provides low-noise and high-reliability operation, reducing the life-cycle cost; through the flexible combination of supercharging terminals + fast charging terminals and intelligent algorithms, flexible configuration of vehicle owner experience and operating efficiency is achieved.

 

In addition, in February 2024, Shenzhen's first residential "photovoltaic storage charging and discharging" integrated project landed in Huazhang Xinzhu.

 

 

Effectively utilizing the supporting spaces of residential buildings and parking lots, such as rooftops, integrating advanced technologies such as photovoltaic power generation, new energy storage, flexible power consumption, liquid-cooled supercharging, virtual power plants, and V2G, and carrying out new model applications such as super-fast charging, flexible charging, and photovoltaic storage direct flexibility, it has been rated as the only residential building project among the first batch of 13 "photovoltaic storage direct flexibility" pilot projects in Shenzhen.

 

 

Economic Benefits
 

While reducing the community's energy consumption and carbon emissions, photovoltaic power generation reduces electricity consumption from the power grid, energy storage peak-valley price difference saves electricity costs, and the liquid-cooled supercharging system provides the park and surrounding new energy vehicles with an ultra-fast charging experience of "a cup of coffee, full power departure." By setting up a photovoltaic system, the annual photovoltaic power generation is about 580,000 kWh, and at an average electricity price of about 0.7 yuan/kWh, the estimated annual savings in operating electricity costs is about 407,000 yuan.

 

 

Environmental Benefits
 

By introducing high-efficiency electromechanical equipment and large-area solar photovoltaic systems, the photovoltaic system's annual carbon reduction is 262.23 tCO2/a, and the air conditioning system's annual carbon reduction is 68.91 tCO2/a, effectively reducing energy consumption and carbon emissions, reducing reliance on traditional energy, helping to alleviate environmental pollution and greenhouse gas emissions, and having a positive impact on promoting regional environmental improvement.