Project Overview

案例概述

Haotian Carbon Neutral Park is located in Gongchen Sub-district, Fangshan District, and covers a total area of about 6.4 hectares, with a green area of about 5 hectares, and officially opened to the public in April 2022. The site where the park is situated was originally a 50,000-cubic-meter construction waste dump. It adopts five core low-carbon design concepts: zero-waste in construction, zero-waste in operation, renewable energy utilization, PEDF application (photovoltaics, energy storage, direct current and flexibility), and near-zero fresh water consumption. The park realizes on-site disposal of construction waste and comprehensively applies more than ten green and low-carbon technologies, including photovoltaic power generation, PEDF power distribution system, recycled building materials, daylighting pipe, energy-saving products, (photovoltaic-storage) electric vehicle charging piles, and reclaimed water & rainwater recycling. These measures effectively reduce carbon emissions. Through carbon sink forests and the model of "self-consumption of self-generated photovoltaic power plus surplus power connected to the grid", the park achieves full-life-cycle zero or even negative carbon emissions. According to CEC, it is expected to realize full-life-cycle carbon neutrality in 2031 (including construction and operations).

昊天碳中和公园位于房山区拱辰街道，总占地面积约6.4公顷，绿化面积5公顷。2022年4月正式向公众开放。公园所在地原为5万方建筑渣土堆，采用施工零废弃物、运营零废弃物、利用可再生能源、用电光储直柔、消耗近零新水五大低碳设计理念，就地消纳建筑渣土，并综合运用光伏发电、光储直柔配电系统、再生建材、导光管采光技术、节能产品、（光储）电动车充电桩，中水雨水回收等十余项绿色低碳技术，降低碳排放量，通过碳汇林和光伏自发自用余电上网,实现全生命期零碳甚至负碳排放。经测算，预计2031实现全生命周期碳中和（含建设和运营排放）。该项目是全国首个全生命周期的碳中和公园。项目依托由房山区拱辰街道、北京环丁环保大数据研究院、美国环保协会共同发起。

Meanwhile, the park has created educational bases themed on climate change, low-carbon technology, low-carbon life, and biodiversity. In July 2023, the "Carbon Neutrality Volunteer Service Team" has been established to disseminate carbon neutrality knowledge, promote low-carbon lifestyle, and showcase low-carbon technology and facilitate joint maintenance and governance. An group standard modeled on Haotian Carbon Neutral Park, titled the Guidelines for Developing Carbon Neutral Parks, was officially released in August 2023, which provide guidance for the construction and implementation of similar projects.

同时，公园重视宣传教育工作，将公园打造成应对气候变化、低碳技术、生物多样性的宣教基地。2023年7月15日成立“敢碳号志愿服务队”，由志愿者宣传公园碳中和设计理念，推动共管共治。2023年8月，以昊天碳中和公园为蓝本制定的团体标准《碳中和公园实施指南》正式发布，为同类型项目建设实施提供指引。

Company/Organization Profile

机构简介

In 2020, Gongchen Subdistrict took the lead in launching a special carbon reduction initiative. In May 2021, it released the “Gongchen Subdistrict Carbon Reduction Action Plan,” which outlined key carbon-reduction tasks across nine sectors, including buildings and transportation. To further advance implementation and initiatives, the Park project was launched as the first carbon neural pilot project.  The park was developed through the "Carbon Neutrality Technology Innovation Challenge" in collaboration with Beijing Huanding Environmental Big Data Research Institute and the Environmental Defense Fund, resulting in the construction of China’s first carbon-neutral park.The park adopting five core low-carbon design Concepts: Zero-waste in construction, Zero-waste in operation, Renewable energy utilization, PEDF application (photovoltaics, energy storage, direct current and flexibility), and Near-zero fresh water consumption.

It is expected to achieve carbon neutrality by 2031, realizing zero carbon emissions throughout its entire construction and operational lifecycle.

拱辰街道于2020年率先启动碳减排专项行动，并于2021年5月发布《拱辰街道碳减排行动计划》，从建筑、交通等九大领域提出碳减排重点任务。公园作为首个碳中和应用场景，通过“碳中和技术创新挑战赛”，与北京环丁环保大数据研究院、美国环保协会等机构合作，建设全国首个碳中和公园。该公园采用施工零废弃物、运营零废弃物、利用可再生能源、用电光储直柔、消耗近零新水五大低碳设计理念，预计于2031年实现建设及运营全生命期碳中和。

Project Outcome

项目成果

1. Comprehensive Application of Over Ten Green and Low-Carbon Technologies to Significantly Reduce Carbon Emissions

In terms of energy utilization, the park integrates photovoltaic (PV) power generation and the PEDF (photovoltaics, energy storage, direct current and flexibility) power distribution system. It not only consumes the green energy generated on-site but also feeds surplus electricity into the grid to achieve carbon offsets. In the recycling and resource utilization of urban waste, it adopts recycled building materials (such as recycled aggregates, recycled concrete, and recycled bricks), reducing carbon emissions during the construction phase to 50% of that caused by alternative raw materials. For water use, all irrigation water in the park comes from reclaimed water and rainwater. In terms of architecture, the public toilets in the park are low-carbon buildings, applying technologies including environmentally friendly recycled materials, water-saving fixtures, solar heating + air-source heat pump systems, and reclaimed water for flushing. This has reduced daily water consumption from 6 m³ to 0.3 m³, cutting carbon emissions by approximately 0.4 tons per year. Additionally, the park realizes on-site disposal of 50,000 cubic meters of construction waste, reducing carbon emissions by about 134 tons compared with transporting the waste off-site.

一是综合利用十余种绿色低碳技术，大幅降低碳排放。在能源利用方面，综合运用光伏发电、光储直柔配电系统，不仅自发自用绿色能源，余电上网实现碳抵消；在城市废弃物循环资源化利用方面，采用再生建材（再生骨料、再生混凝土、再生砖等），降低建设期碳排放（其碳排放量为替代原料的50%）；在用水方面，公园灌溉用水全部来自中水和雨水；在建筑方面，公园公共卫生间为低碳建筑，应用环保回收材料、节水器具、太阳能供热+空气源热泵系统、以及中水冲厕等技术，每日用水量从6m3降为0.3m3，减少碳排放量约0.4吨/年；此外，就地消纳5万方渣土，相较外运减少碳排放约134吨。

2. Demonstration Application of Solar Clean Energy Combined with Cutting-Edge PEDF Technology

The PV panels installed in the park are expected to achieve an annual power generation of 112,000 kWh, of which approximately 82,000 kWh is used on-site and 30,000 kWh of surplus electricity is fed into the grid, equivalent to about 24 tons of carbon offsets. From the trial operation in 2022 to July 31, 2025, a total of 1,807 × 100 kVA of surplus electricity has been connected to the grid. The park has introduced the PEDF power distribution system, linking PV power generation to an intelligent DC bidirectional charging and discharging system. In addition to intelligently regulating electricity consumption, the system is equipped with one one-way DC flexible charging pile and two two-way DC flexible charging piles, which can realize controllable transfer of PV power through electric vehicles. Electric vehicles act like large mobile power banks and can provide reverse power supply to the park in emergency situations. This not only ensures energy security and demonstrates the integrated application of clean energy and energy storage technology but also provides convenience for surrounding residents to charge their electric vehicles. All operation vehicles in the park are electric vehicles, which can be directly charged using the solar PV panels installed in the park.

二是利用太阳能清洁能源并结合光储直柔前沿技术进行示范应用。公园安装光伏板预计年发电11.2万度，自用约8.2万度，余电3万度并入电网，折合约24吨碳抵消量。自2022年试运行至2025年7月31日，共有1807×100KvA富余电量并网。公园引入光储直柔配电系统，将光伏发电量与智慧直流双向充放电系统相连。系统除了智能调控用电量，还配备了1台单向直流柔性充电桩和2台双向直流柔性充电桩，可利用电动车对光伏电量进行可控迁移。电动汽车就像一个大型的移动充电宝，在紧急情况下可以为公园反向供电。不仅确保能源安全，体现了清洁能源和储能技术的结合应用，还为周边居民电动车充电提供便利。公园内作业车全部为电动车，可以直接用公园安装的太阳能光伏板为作业车供电。

3. Balanced Development of Ecological Functions

Garden waste in the park is crushed and composted on-site, which is then used to nourish flowers, grass and trees. In addition, biochemical waste is sorted into different categories. The park is equipped with a total of 5 intelligent waste bins (covering two categories: recyclables and residual waste) and 1 children-specific waste bin. These intelligent waste bins are powered by solar energy and feature functions such as voice-activated door opening, automatic weighing, overflow monitoring and alarm, and waste classification promotion and guidance. The total green area of the park is over 50,000 square meters, with more than 2,800 native seedlings planted. It is expected to generate 1,236 tons of carbon sequestration over 25 years, with an average annual carbon emission reduction of approximately 50 tons.

三是兼顾生态功能。园林垃圾就地粉碎堆肥处理，回护花草树木。另外，生化垃圾进行垃圾分类。整个公园共计摆放了5个两品类（可回收物、其他垃圾）智能垃圾箱和1个儿童垃圾箱。该智能垃圾箱由太阳能供电，具备语音交互开门、自动称重、满溢监测报警、垃圾分类宣传引导等功能。公园整体绿化面积为5万余平方米，种植本土苗木2800余株，25年可产生碳汇1236吨，年均碳减排量约50吨。

4. Systematic Construction of Public Education and Promotion System

The park has set up nearly 100 exhibition boards on carbon neutrality technology popularization and ecological protection education. Through diagrams and interactive devices, it helps the public understand technologies such as PEDF, carbon sequestration, and reclaimed water & rainwater recycling for irrigation. An online VR exhibition hall has been established, allowing the public to scan the QR code to enter the virtual park and learn about carbon neutrality-related technologies and knowledge. An electronic display screen is installed to show data such as the park’s carbon neutrality progress for public supervision. In addition, experts are organized to provide special training for volunteers on topics including the low-carbon design of the carbon-neutral park, the application of green and low-carbon technologies, and biodiversity conservation. As of June 2025, 60 public welfare lecturers have been trained, who will provide long-term and stable publicity services for the carbon-neutral park. The trained volunteers support surrounding communities in carrying out low-carbon and environmental protection activities. In 2025, the service team recruited 306 volunteers, carried out 40 volunteer activities with 1,500 participant visits, accumulated 1,720 volunteer service hours, and served over 3,500 surrounding residents. Specific activities include "Insect Hotel", "Adopt a Tree", "Biodiversity in Urban Parks", and "Make the Most of Things: Green Circulation".

四是公众宣教体系化建设。公园设立了近百块碳中和技术科普及生态保护宣教展板，通过图示和互动装置帮助公众理解光储直柔、碳汇、中水雨水回收灌溉等技术。建立线上VR展厅，公众可扫码进入虚拟公园浏览碳中和相关技术和知识。配备一块电子显示屏，展示公园碳中和进度等数据供公众监督。此外，组织专家对志愿者进行关于碳中和公园低碳设计、绿色低碳技术应用、生物多样性保护等专题培训。截至2025年6月，培训了公益宣讲员60名，并将为碳中和公园提供长期稳定的宣讲服务。培训的志愿者支持周边社区开展低碳环保活动。2025年，服务队招募志愿者306人，开展志愿活动40场，参与1500人次，志愿者服务时长1720小时，服务周边居民3500余人。开展“昆虫旅馆”、“认养一棵树”、“城市公园里的生物多样性”、“物尽其用 绿色循环”等40场活动。

Project Highlights

项目亮点

Based on a 25-year operational period, the park’s low-carbon construction plan has achieved a cumulative carbon emission reduction of 934 tons, while the carbon offsets generated by photovoltaic (PV) systems amount to 1,823 tons and the carbon sequestration has increased by 1,237 tons. The project is expected to achieve full life-cycle carbon neutrality within 10 years.

Meanwhile, the park has adopted green and low-carbon technologies such as on-site construction waste mountain building and reclaimed water & rainwater recycling. It has also established the "Gantanhao" Volunteer Service Team to attract the public to participate in the joint construction and governance of the low-carbon park.

The project has received multiple accolades, including: 2024 International Green Design Award (Nomination); 2023 Beijing New Era Practice Outstanding Innovation Case; 2023 Fangshan District New Era Civilization Practice Award; 2021 China Distributed Integrated Energy Outstanding Technology Award; 2021 2nd National Eco-Concrete Innovation Design and Application Competition (Third Prize)

以25年项目运营期计算，公园低碳建设方案累计减少碳排放量为934吨，光伏产生碳抵消量为1823吨，增加碳汇量1237吨，预计项目将在十年实现全生命周期碳中和，并富余碳抵消量2139吨。同时，采用渣土就地造山、中水雨水回收等绿色低碳技术，组建“敢碳号”志愿服务队，吸引全民参与低碳公园共建共治。公园目前获得国内外奖项5个。如2024绿色设计国际大奖（提名），还在COP28大会和国合会2024年会上作为优秀案例被推广，在国际舞台上展示了中国的低碳发展成果。2023年北京新时代实践优秀创新案例，2023年房山区新时代文明实践奖，2021中国分布式综合能源优秀技术奖，2021第二届全国生态混凝土创新设计应用大赛三等奖。“敢碳号”志愿服务队获得了2023年度北京市新时代文明实践优秀创新案例、房山区2023年新时代文明实践活动“文明实践奖”等荣誉。

Project Implementation

项目实施

1. Preliminary Planning: At the end of 2020, Gongchen Subdistrict collaborated with an expert team to develop the “Gongchen Subdistrict Carbon Reduction Action Plan,” laying the foundation for the park’s construction.

2. Construction Philosophy: The park adopts five major low-carbon design concepts: Zero construction waste; Zero operational waste; Use of renewable energy; PEDF (photovoltaics, energy storage, direct current and flexibility); Near-zero new water consumption.

3. Specific Measures: On-site construction-waste landscaping to avoid emissions from secondary land requisition and transport. Installation of approximately 98 kW of photovoltaic solar panels, generating an average of 112,000 kWh annually. Enhanced rainwater and reclaimed water utilization; aside from drinking and washing water, no tap water is consumed. Maximized internal resource recycling, e.g., using deadwood and branches as supports for transplanted saplings or as signposts.

4. Technology Selection: Through the “Carbon Neutrality Technology Challenge,” low-carbon technologies such as photovoltaic solar panels, electric vehicle charging stations, and rainwater collection tanks were selected and integrated organically into the park environment.

5. Operational Management: The “Gantanhao” Volunteer Service Team was established to promote the park’s carbon-neutral design philosophy, implement biodiversity protection measures, and support park operation and maintenance.

6. Before-and-After Comparison: The park site was originally a construction waste pile with poor environmental conditions, negatively affecting nearby residents’ quality of life. After transformation, Haotian Carbon-Neutral Park now covers about 6.4 hectares, with 5 hectares of green space, providing a popular venue for leisure and relaxation.

The park achieves near-zero carbon emissions during operation.Planted trees absorb approximately 50 tons of CO₂ annually.Photovoltaic solar power meets the park’s electricity needs, with a small surplus fed into the grid. The park also functions as an environmental education base and biodiversity conservation site, attracting thousands of visitors daily for education, leisure, and recreation.

1. 前期规划：2020年底，拱辰街道与专家团队合作，共同制定《拱辰街道碳减排行动计划》，为公园建设奠定基础。

2. 建设理念：采用施工零废弃物、运营零废弃物、利用可再生能源、用电光储直柔、消耗近零新水五大低碳设计理念。

3. 具体措施：渣土就地造山，避免二次征地建设和外运产生的碳排放；安装约98千瓦的光伏太阳能发电配套，年均发电量约11.2万度；加大雨水回收和中水利用，除饮用水、洗漱水外，不消耗自来水资源；最大限度实现资源内部循环，如将枯木、树枝用于做移栽小树的支撑架或指示牌等。

4. 技术筛选：通过“碳中和技术挑战赛”的形式，筛选出光伏太阳能面板、电动汽车充电桩、雨水收集池等低碳绿色技术，并与公园场景有机融合。

5. 运营管理：组建“敢碳号”志愿服务队，宣传公园碳中和设计理念，践行生物多样性保护措施，支持公园运维管理。

6. 实施前后对比：公园原址是一处渣土堆，环境条件恶劣，影响周边居民生活体验。经过改造，昊天碳中和公园总面积约6.4公顷，绿化面积约5公顷，成为市民休闲放松的好去处。公园实现了近零碳排放运营，种植的树木年均可吸收二氧化碳近50吨，光伏太阳能发电在满足公园内部用电。同时，还能实现一小部分清洁能源上网。此外，公园还成为了环保宣传的教育基地和生物多样性的保护基地，吸引了大量市民前来参观学习和休闲娱乐，日均人流量可达上千人。

Project Impact & Sustainability

项目影响力、可推广性与可持续性

Hao Tian Carbon-Neutral Park screened out low-carbon and green technologies such as solar photovoltaics (PV), PEDF (photovoltaics, energy storage, direct current and flexibility), bidirectional charging piles for electric vehicles, rainwater harvesting, and recycled building materials through the "Carbon Neutrality Technology Innovation Challenge". These technologies are organically integrated with the park’s scenarios, realizing internal resource circulation, reducing operating costs, and ensuring the park’s sustainable operation. With certain universality and replicability, these technologies provide reference value for other regions.In August 2023, the group standard Implementation Guidelines for Carbon-Neutral Parks — formulated based on the model of Hao Tian Carbon-Neutral Park — was officially released. It provides guidance for similar projects and helps promote the construction of carbon-neutral parks across China.

昊天碳中和公园通过“碳中和技术挑战赛”筛选诸如太阳能光伏、光储直柔、电动汽车双向充电桩、雨水收集、再生建材等低碳绿色技术，并与公园场景有机融合，实现了资源的内部循环，降低了运营成本，保证了公园的可持续运营，这些技术具有一定的通用性和可复制性，为其他地区提供了参考借鉴价值。以昊天碳中和公园为蓝本制定的团体标准《碳中和公园实施指南》于2023年8月公开发布，为同类项目提供指引，有助于推动全国碳中和公园的建设。

In terms of exchange and influence, the park has successively received cadres from Fangshan District, staff and leaders from environmental protection departments of multiple regions (including Shijingshan District, Shanghai Municipality, Sichuan Province, and Shenzhen City), as well as representatives from China Invention Association for exchanges and research. In addition, it has hosted international delegations on many occasions, such as:A delegation led by the Vice President of the Environmental Defense Fund (EDF, U.S.) in 2023;Teachers and students from universities in Hong Kong and Macao in 2024;More than 30 government officials and technical personnel from 10 developing countries (including Egypt, Tanzania, Armenia, and Laos) in 2025.In the future, more exchange and learning activities will be carried out based on the park.

在交流影响方面，先后接待房山区干部、多地环保部门（石景山、上海市、四川省、深圳市）及中国发明协会等领导和工作人员交流调研。此外，还多次还接待国际团。 如2023年美国环保协会副总裁一行， 2024年港澳高校师生，2025年接待来自埃及、坦桑尼亚、亚美尼亚、老挝等10个发展中国家30余名政府官员和技术人员。未来还将基于公园开展更多交流学习活动。

(Using AI translation)

（使用AI翻译）