Project Overview

案例概述

Wuxi Metro carried out an energy-saving retrofit of approximately 2,400 advertising light boxes across 57 stations on Lines 1 to 4 between 2023 and 2024, with the project completed and accepted in December 2024. The initiative involved the adoption of high-efficiency LED luminaires and an IoT-based smart lighting system, enabling automatic brightness adjustment based on passenger flow, remote monitoring, and refined management.

无锡地铁于2023年至2024年间对1-4号线57个站点约2400个广告灯箱实施了节能改造，于2024年12月完成验收。项目采用高光效LED灯具和物联网智慧照明系统，实现了按客流量自动调光、远程监控和精细化管理。

Post-retrofit, the project achieves annual electricity savings of 2.244 million kWh, with an energy saving rate exceeding 70%. This translates to approximately RMB 1.638 million in reduced electricity costs and a cut in carbon emissions of around 1,078 tons per year. Additionally, the project has the potential to generate local Carbon Inclusion voluntary emission reductions, yielding an estimated annual carbon revenue of CNY 43,000. These funds will be earmarked for incentivizing green travel among the public, further promoting the green and low-carbon development of Wuxi's rail transit system.

改造后年节电量达224.4万kWh，节电率超70%，年节省电费约163.8万元，减少碳排放约1078吨。项目还具备开发地方碳普惠减排量的潜力，年均可产生4.3万元碳收益，用于激励公众绿色出行，助推无锡轨道交通绿色低碳发展。

Company/Organization Profile

机构简介

Zhong Carbon Energy Investment Environmental Service Group Co., Ltd. (hereinafter referred to as “ZhongTan Environment”) is committed to the mission of “Fostering Sustainable Economies, Promoting Ecological Value,” focusing on the integration of digitalization and green industries to provide global clients with one-stop services for achieving carbon peak and carbon neutrality goals. With a seasoned team of experts and multiple professional qualifications, ZhongTan Environment possesses extensive experience in carbon management and green finance, and has long served as a low-carbon advisor to governments.

江苏中碳能投环境服务集团有限公司（以下简称“中碳环境”）以“助经济持续，兴生态价值”为使命，聚焦数字化与绿色产业融合，为全球客户提供“双碳”目标一站式服务。中碳环境拥有资深专家团队和多项专业资质，在碳管理、绿色金融等领域具备丰富经验，团队长期担任政府低碳顾问。

To date, ZhongTan Environment has obtained 12 software copyright registrations and 10 invention patents, and has participated in the formulation of nearly 30 national, industry, and association standards.In March 2025, the Wuxi Carbon Management Platform, supported by ZhongTan Environment, was officially launched and has been highly commended by the Wuxi municipal government.

中碳环境累计获得软件著作权登记证书12项、发明专利10项，参编国标、行标、团标近30项。2025年3月，由中碳环境支持建设的无锡市碳管理平台正式上线，获无锡市政府高度认可。

Project Outcome

项目成果

1. Annual reduction of approximately 1,078 tons of CO₂ emissions: The energy-saving retrofit significantly cut carbon emissions associated with electricity consumption.

1. 年减排二氧化碳约 1,078 吨：通过节能改造，显著降低了电力消耗对应的碳排放。

2. Electricity savings of 2.244 million kWh per year, with an energy saving rate exceeding 70%: The use of high-efficiency LEDs and smart control systems greatly reduced power usage.

2. 年节电量224.4万kWh，节电率超70%：采用高效LED和智能控制系统，实现用电量大幅下降。

3. Annual cost reduction of approximately RMB 1.638 million in electricity expenses: Energy savings directly lowered operating costs and improved economic efficiency.

3. 年节省电费约163.8万元：节能效果直接降低运营成本，提升经济效益。

4. Potential annual carbon revenue of RMB 43,000: Additional environmental benefits gained through generating local Carbon Inclusion voluntary emission reductions, used to incentivize green travel.

4. 潜在碳收益4.3万元/年：通过开发地方碳普惠减排量获得额外环境收益，用于激励绿色出行。

5. Smart management reduces manual operation and maintenance costs: The IoT-based system enables remote monitoring and control, increasing efficiency and reducing

5. 智能化管理减少人工运维成本：依托物联网系统实现远程监控与调控，提升效率并降低维护需求。

Project Highlights

项目亮点

The Wuxi Metro Advertising Light Box Energy-Saving Retrofit Project prioritized smart upgrades of existing light boxes instead of full replacements. By installing IoT modules, it achieved adaptive "brighten when approached, dim when vacant" lighting control, making efficient use of current resources.

无锡地铁广告灯箱节能改造项目优先采用了对既有灯箱的智能化升级而非全面替换，通过加装物联网模块实现“人近灯亮、人过灯暗”的智能调节，有效利用了现有资源。

In terms of ecological synergy, the project innovatively integrated energy savings with the Carbon Inclusion mechanism, using carbon trading revenue to incentivize green travel—forming a virtuous cycle of “energy savings - carbon revenue - green incentives”. As the first network-wide smart lighting retrofit of its kind in China, it has gained industry recognition and praise for its remarkable energy efficiency (over 70% reduction) and low-carbon practices.

在生态协同方面，项目将节能收益与碳普惠机制创新结合，将碳交易所得用于激励公众绿色出行，形成了“节能—碳收益—绿色激励”的良性循环。该项目作为全国首个线网级灯箱智能化改造案例，获得了行业认可，并因其显著节能效果（节能率高达70%）和低碳实践受到好评。

Project Implementation

项目实施

The Wuxi Metro Advertising Light Box Energy-Saving Retrofit Project was launched in 2023 and completed acceptance in December 2024, aiming to support the national "Dual Carbon" goals and systematically reduce the energy consumption of metro operations. The project covered approximately 2,400 advertising light boxes across 57 stations on Lines 1-4, achieving energy savings and efficiency improvements through IoT-enabled smart lighting technology.

无锡地铁广告灯箱节能改造项目于2023年启动，至2024年12月完成验收，旨在响应国家“双碳”目标，系统性降低地铁运营能耗。项目覆盖1-4号线57个车站约2400个广告灯箱，通过物联网智慧照明技术实现节能增效。

Implementation Plan and Process:
The project adopted an energy performance contracting model (also known as EPCO, Energy Performance Contracting), where the energy service company fully funded the retrofits, and the metro operator repaid the investment through shared energy savings. The technical approach included: replacing aging LED fixtures on Lines 1 and 2 with high-efficiency LEDs, installing energy-saving IoT controllers and human presence detectors (millimeter-wave/infrared sensors) across all lines, and building an IoT smart lighting perception platform. This platform enabled remote monitoring, intelligent dimming (e.g.,  "brighten when occupied, dim when unoccupied"), and hierarchical management. It featured functions such as energy consumption statistics, fault alerts, and mode strategy settings, allowing flexible lighting adjustments based on passenger flow, time, and location.

实施方案与过程：
项目采用“节能效益分享型”模式，由节能服务公司全额投资改造，地铁方以节能效益分期偿还。技术路线包括：将1、2号线老化LED灯具更换为高光效LED灯具，全线加装节能物联控制器、人体感应探测器（毫米波/红外传感器），并搭建物联网智慧照明感知平台，实现对灯箱的远程监测、智能调光（如“人近灯亮、人走灯暗”）和分级管理。平台具备能耗统计、故障报警、模式策略设置等功能，支持按客流、时间、区域灵活调节照明方案。

Pre- and Post-Retrofit Comparison:
Before the retrofit, the annual electricity consumption of the light boxes was approximately 4,715.5 MWh, with issues such as aging fixtures, imprecise control, and low maintenance efficiency. After the retrofit, annual electricity savings reached 2.244 million kWh, with an energy-saving rate exceeding 70%. This resulted in annual cost savings of RMB 1.638 million and reduced CO₂ emissions by approximately 1,078 tons. Intelligent control ensured optimal brightness during peak hours for passenger comfort and automatically reduced power during off-peak hours. Real-time fault dispatch and repairs significantly improved operational efficiency.

实施前后对比：
改造前，全线灯箱年耗电约4715.5 MWh，存在灯具老化、控制粗放、维修效率低等问题。改造后，年节电量达224.4万kWh，节电率超70%，年省电费163.8万元，年减排二氧化碳约1078吨。通过智能调控，高峰时段亮度保障乘客体验，低峰时段自动降压节能，同时实现了故障实时派单维修，运维效率显著提升。

Challenges Overcome and Support Received:
The project successfully addressed challenges such as integrating multiple technical systems, retrofitting existing equipment (preserving original light box structures), and cross-departmental coordination (collaboration among operations, advertising, and equipment teams). Implementation was supported by policies from the Wuxi Development and Reform Commission and the Ecological Environment Bureau, guided by documents such as the "Work Plan for Accelerating the Construction of a Dual Control System for Carbon Emissions." The energy service company provided technical expertise, while the metro established a dedicated task force to ensure efficient execution and stable long-term operation.

克服的挑战与支持：
项目成功克服了多技术系统集成难度、设备利旧改造（保留原有箱体结构）、跨部门协调（运营、广告、设备等多方协作）等挑战。项目实施获无锡市发改委、生态环境局政策支持，并依托《加快构建碳排放双控制度体系工作方案》等指导文件推进；节能服务公司提供技术支撑，地铁内部成立专项小组对接落地，确保了项目高效实施与后期稳定运营。

Project Impact & Sustainability

项目影响力、可推广性与可持续性

This project has achieved "on-demand lighting adjustment and refined management" of metro advertising illumination through the application of an IoT-based smart lighting system and high-efficiency LED technology, demonstrating significant technological innovation and institutional exemplarity. It explores the implementation of a "Carbon Inclusion" mechanism at the metro lightbox system level, converting energy savings into carbon assets and reinvesting them into green travel incentives—highlighting its innovative approach.

本项目通过物联网智慧照明系统与高光效LED技术应用，实现了地铁广告照明“按需调光、精细管理”，具备显著的技术创新性和机制示范性。项目探索在地铁灯箱系统级应用“碳普惠”机制，将节能收益转化为碳资产并反哺绿色出行激励，机制创新突出。

The project is replicable and scalable; its technical solution is suitable for various public transportation and commercial lighting scenarios, while the Carbon Inclusion model offers a market-oriented pathway for urban public energy-saving initiatives. It has facilitated the low-carbon transformation of metro operations and provided a practical foundation for the development of local carbon reduction methodologies, contributing to the construction of regional carbon markets.

项目具备可复制推广性，技术方案适用于各类公共交通、商业照明场景，碳普惠模式为城市公共节能项目提供了市场化路径。项目推动了地铁运营低碳转型，也为地方碳减排方法学开发提供了实践基础，助力区域碳市场建设。

Future plans include participating in the formulation of a Carbon Inclusion methodology for metro lighting and gradually expanding the project to all lines of Wuxi Metro and other urban rail transit systems, continuously enhancing energy-saving and emission-reduction contributions.

后续计划参与制定地铁照明碳普惠方法学，并逐步扩展至无锡地铁全线及其他城市轨道交通项目，持续提升节能减排贡献度。

(Using AI translation)

（使用AI翻译）