1. The Meaning and Evolution of Intelligent Buildings
With rapid advancements in information technology, building technologies have evolved as well, giving rise to a more sophisticated concept of intelligent buildings. Initially, the term “intelligent buildings” was broadly used, especially in the Chinese market, where marketing terms like “3A Building” and “5A Building” were common. A “3A Building” integrates Building Automation (BA), Communication Automation (CA), and Office Automation (OA). The “5A Building” concept expands this by adding Fire Automation (FA) for fire alarm and extinguishing systems, and Security Automation (SA) for security controls, further broadening the automation framework. Traditionally, BA systems were seen as building control or equipment monitoring systems.
In 2000, China officially defined intelligent buildings with the national standard “Design Standards for Intelligent Buildings” (GB/T50314-2000). According to this, an intelligent building integrates building equipment, office automation, and communication networks, combining structure, systems, services, and management to offer a safe, efficient, comfortable, and convenient environment for occupants. Initially, this definition did not address energy conservation and environmental protection. The 2006 revision (GB/T50314-2006) updated the standard to include energy-saving and environmental protection concepts. The revised standard positions intelligent buildings as platforms integrating information facility systems, information application systems, building equipment management, and public safety systems, aiming to deliver environments that are safe, efficient, convenient, energy-saving, environmentally friendly, and healthy.
Intelligent buildings are complex engineering projects that integrate architecture, structural systems, water supply, heating and ventilation, electrical systems, and more. Similar to the human body, a building is “healthy” only when all systems work harmoniously. The “intelligent” aspect refers to the building’s ability to sense and regulate environmental factors such as air and water quality, sunlight, and temperature, thus providing a comfortable, healthy, safe, and energy-efficient space. This integration boosts occupant productivity and reduces issues like “building syndrome.” Therefore, the segmented “A” classifications do not fully capture what makes a building truly intelligent.
Building intelligent systems are electrical information systems within intelligent buildings. In China, these are often referred to as “weak current” systems, contrasting with traditional electrical (“strong electricity”) and lighting systems. The subsystems included in a building’s intelligent system may vary, and not all intelligent buildings utilize every subsystem. System design should consider the building’s function, investment, and management needs. Subsystem standards should emphasize integration, unity, relevance, and the use of computer network technologies for resource sharing, enhanced functionality, and reduced costs.
2. Components of the Building Equipment Monitoring System
According to Section 6.1.3 of the “Code for Quality Acceptance of Intelligent Building Engineering” (GB50339-2003), the building equipment monitoring system consists of the following subsystems:
1. Air conditioning and ventilation system
2. Power transformation and distribution system
3. Public lighting system
4. Water supply and drainage system
5. Heat source and heat exchange system
6. Freezing and cooling water system
7. Elevator and escalator systems
8. Data communication interface between the monitoring system and subsystems
9. Central management workstation and operation substations
10. Real-time performance monitoring
11. System maintainability
12. System reliability
13. Quality of on-site equipment installation
14. On-site equipment performance
15. Evaluation based on design requirements
Within intelligent building systems, the Building Automation (BA) system is crucial for ensuring energy efficiency and environmental quality. It is the most technologically advanced subsystem and is considered the core automation system in intelligent buildings.
3. Testing of the Building Equipment Monitoring System
1. System Testing: This process involves a thorough inspection and assessment of the system’s functionality, performance, and any potential defects after installation and commissioning. Testing is conducted following a designated trial operation period and prior to final project acceptance. The results provide the basis for project completion and evaluation of the intelligent system’s level.
Design standards for intelligent buildings require multidisciplinary collaboration, extending beyond electrical (“weak current”) systems. For example, architectural design must take into account natural sunlight, artificial lighting, and thermal radiation effects. Prioritizing appearance over structural rationality can result in visually impressive but functionally inadequate buildings. Therefore, intelligent buildings must be designed as integrated, multidisciplinary systems.
4. Building Equipment Monitoring System
The Building Equipment Management System (BMS), as outlined in the “Intelligent Building Design Standard” (GB/T50314-2006), is also known as the Building Equipment Monitoring System (BAS) and the Public Safety System (PSS) in the “Code for Quality Acceptance of Intelligent Building Engineering” (GB50339-2003).
While equipment monitoring systems are commonly used in public buildings such as offices, hotels, and sports venues, residential communities also contribute significantly to China’s economic development. The emergence of intelligent residential areas presents substantial market opportunities. In residential settings, system functions and technologies should be tailored to household needs to maximize utility. Besides public area monitoring systems, home controllers are essential in residential intelligent systems, allowing for the collection and remote transmission of utility meter data (water, electricity, gas, drinking water, hot water, heating, etc.) and providing control over household appliances.
5. Functions of the Building Equipment Monitoring System
Section 6.1.2 of the “Code for Quality Acceptance of Intelligent Building Engineering” (GB50339-2003) states that the building equipment monitoring system is designed to monitor, control, and automate the management of various mechanical and electrical equipment in the building, ensuring safety, reliability, energy efficiency, and centralized management.
In summary, the system provides:
– Automatic monitoring and adjustment in response to indoor environmental changes
– Interlocked start, stop, and operation of equipment to ensure safe operation
– Automatic fault detection for timely maintenance
– Optimization controls for energy conservation and reduced consumption
– Process automation to minimize manual management
6. Requirements for System Testing
(1) The system must be installed, debugged, and operated continuously for the required trial period.
(2) All relevant technical documents and quality control records must be submitted.
Building equipment monitoring systems should be tested after at least one month of continuous trial operation. Testing should be based on technical documents, construction and design drawings, design change review documentation, and the technical specifications for the equipment and products used.
7. Key Focus Areas in System Testing
System testing should focus on verifying system functionality and performance, as well as reviewing the quality of on-site installation, equipment performance, and project quality records.
8. System Testing Procedure
(1) The construction entity, contractor, or user applies to a testing agency for commissioning.
(2) The testing agency reviews project documentation, clarifies requirements, and develops a testing plan.
(3) Testing is conducted according to the plan, with detailed and accurate on-site records. Records must be clearly written, error-free, and signed or stamped by inspection personnel.
(4) After testing and inspection are completed, a report must be issued within the agreed timeframe. The report should include signatures from relevant personnel and the official seal of the testing institution, clearly stating whether the system passes, any issues found, and recommendations for corrective actions.
Currently, China’s national standards, technical specifications, and industry regulations for intelligent buildings are not fully standardized or comprehensive. For example, the updated “Design Standards for Intelligent Buildings” (GB/T50314-2006) categorizes standards by building function, while the “Code for Quality Acceptance of Intelligent Building Engineering” (GB50339-2003) does so by system. This inconsistency leads to a lack of standardization and systematic approaches in intelligent building design and construction. Effective supervision and quality management are needed, both administratively and technically. This means strengthening qualification reviews for system integrators—evaluating their capacity, expertise, and technical proficiency—and incorporating intelligent building design and construction into the overall quality supervision system. Supervision should cover all project phases: design, construction, and system operation management. Upon completion, projects must undergo testing and acceptance in accordance with relevant quality standards and specifications.
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