CCFED SCI-TECH INNOVATION BUILDING

  Building Envelope, Insulation & Shading:

Roof & Exterior Wall Insulation Upgrades: Inverted roofs utilize 100 mm XPS boards and green vegetation (K-value = 0.25–0.32 W/(m²·K)). Exterior walls integrate 200 mm aerated concrete blocks with 40 mm vitrified bead insulation mortar and 100 mm rock wool batts (K-value = 0.72–0.75 W/(m²·K)).
High-Performance Glazing & Shading Systems: Unitized triple-silver Low-E insulated glass curtain walls (K-value = 2.07 W/(m²·K), base SHGC = 0.19) are paired with 700 mm horizontal fixed shading fins on south, east, and west facades, lowering the composite SHGC to 0.16 and cutting envelope cooling loads by 41.2%.Air tightness is optimized to effectively block outdoor thermal infiltration and reduce energy losses from unorganized ventilation.

  High-Efficiency HVAC & Heat Recovery Equipment:

Ultra-Efficient Central Cooling Plant: Deploys three 750 RT variable-speed centrifugal chillers (COP 7.2, IPLV 10.0) and one 450 RT variable-speed screw chiller (COP 6.7, IPLV 9.0) with variable-speed pumps and cooling towers, targeting a cooling plant SEER-sys of 6.0.
Total Heat Recovery & Advanced Terminals: Integrates split evaporative total heat recovery fresh air units (efficiency ≥ 70%, recovering 1.01M kWh/a heat in cooling season); headquarters office floors utilize BLDC FCUs with stepless speed control; canteen DHW is supplied by 4 x 90 kW air-source heat pumps (COP 3.52).

  High-Efficiency Lighting & Electrical System:

100% LED Lighting & Smart Controls: Employs 100% LED fixtures with smart control systems. Office Lighting Power Density (LPD) is restricted to 4.77–5.77 W/m² (61.5% below national code limits), saving 95,000 kWh/a via daylight harvesting and scene scheduling.
Class A Energy-Efficient Elevators & Regeneration: Equipped with 21 passenger elevators and 1 freight elevator, all ISO Class A certified. Featuring variable-frequency group dispatching and regenerative feedback (25%–45% energy recovery rate), vertical transport achieves a 56% energy reduction over Class C baselines.

  Renewable Energy & Building Integrated Photovoltaics (BIPV):

Rooftop & Facade BIPV Systems: Large-scale integrated application of renewable energy, adopting a comprehensive layout of "rooftop monocrystalline PV + facade CdTe thin-film PV". Rooftops install monocrystalline PV panels (188.87 kWp capacity, 916.63 m² area); south, east, and west shading fins integrate CdTe thin-film BIPV modules (1,012 kWp capacity, 6,936.08 m² area). Total installed capacity reaches 1,200.87 kWp across 7,852.71 m², generating 653,400 kWh (7.52 kWh/m²·a) in the first year with a 25.4% renewable energy utilization rate.
 

 Building Automation & HVAC Optimization Control (BMS & HVAC Optimization Control):

Central BAS & Cooling Plant Group Control: Deploys a centralized Building Automation System (BAS) integrating chillers, variable-speed pumps, cooling towers, and FCUs. Headquarters floors utilize Brushless DC Fan Coil Units (BLDC FCUs) networked with BAS using PID algorithms (temperature precision ±0.5°C) for stepless fan speed and valve modulation.
Automated Solar Chimney Control Strategy: The 120m-high, 3-section north solar chimney works with motorized window actuators, controlled by BMS based on real-time weather thresholds (wind speed < 20 m/s, dry-bulb temp < 25°C, relative humidity < 70%) to drive stack-effect natural ventilation and night purge cooling during shoulder seasons.

  Indoor Air Quality Sensing & Demand-Controlled Ventilation (IAQ Sensing & Demand Ventilation):

CO₂ Demand-Controlled Fresh Air: CO₂ sensors installed in occupied office and conference spaces link directly with split evaporative total heat recovery fresh air units (efficiency ≥ 70%), dynamically maintaining indoor CO₂ ≤ 900 ppm and automatically modulating fresh air supply between 50%–100% of design thresholds to eliminate over-ventilation cooling loss.
High-Efficiency Air Filtration Controls: Fresh air units integrate C4/G4 coarse filtration paired with electrostatic precipitators (F7 rating, >90% PM2.5 filtration efficiency) to ensure optimal indoor environmental quality.

  Intelligent Lighting Scene Scheduling & Daylight Harvesting (Intelligent Lighting & Daylight Harvesting):

Zoned Scene Modes & Time Clock Scheduling: Public lobbies, canteens, and meeting rooms adopt smart lighting controls integrating time clock schedules (peak, off-peak, late night) and multi-scene modes (Welcome, Meeting, PPT, Energy-Saving, All-Off) to eliminate non-operational lighting waste.
Daylight Harvesting & Continuous Dimming: Illuminance sensors in high-zone open offices, podium lobbies, and exhibition areas continuously measure ambient natural light and modulate LED fixtures via 0–10V stepless dimming, saving 95,000 kWh/a while maintaining constant task illumination.

  Energy Sub-metering & Digital Operations (Energy Metering & Digital Operations):

Comprehensive Energy Sub-metering: Deploys an automated sub-metering system monitoring electrical energy across central cooling, fresh air ventilation, lighting, power, elevators, and the 1,200.87 kWp rooftop and BIPV solar PV installations.
Data-Driven Performance Tuning: Leverages DesignBuilder energy simulations and continuous monitoring analytics to track cooling plant seasonal performance (SEER-sys ≥ 6.0), elevator regenerative feedback (25%–45% energy recovery rate), and PV system efficiency, identifying performance drift for proactive maintenance tuning.

  Operational Scheduling & Demand-Driven Management:

Zoned Office & Public Space Scheduling: Central cooling plants operate on workdays 08:00–18:00 during the cooling season (April 15–November 30). Office occupancy and lighting ramp up from 07:00 and ramp down between 18:00–19:00, after which systems automatically enter low-energy standby mode.
Canteen & Exhibition Space On-Demand Operation: The 1F–3F staff canteen (serving 5,000 meals/day) operates full lighting and HVAC strictly during meal service hours (11:00–14:00, 17:00–20:00), switching to low-power modes during off-peak periods. The 4F China Construction Museum schedules ventilation and lighting based on event timetables to eliminate non-operational energy waste.

   Environmental Guidelines & Sufficiency Standards:

Summer Thermal Comfort & Setpoint Restrictions: Indoor summer cooling setpoints are strictly restricted to ≤26°C with relative humidity controlled at ≤60%, optimizing predicted mean vote (PMV) thermal comfort while avoiding energy waste from over-cooling.
IAQ-Driven Demand Controlled Fresh Air: Fresh air supply across office and conference spaces dynamically links with indoor CO₂ sensors (maintaining CO₂ ≤ 900 ppm) and modulates fresh air between 50%–100% of design thresholds, fostering employee habits that align health and comfort with energy restraint.

  Tenant/Employee Engagement & Sustainability Showcase:

Construction Museum & Carbon Neutrality Demonstration: Leveraging the 4F China Construction Museum and HQ building demonstration platform, real-time data from the 1,200.87 kWp composite PV system, sub-metered power consumption, and carbon reduction performance (reducing CO₂ by 2,090 t/a, a 58.9% reduction rate) are displayed to staff and visitors, serving as a low-carbon education and behavioral engagement portal.
Smart Lighting Scene Modes & Power-Down Habits: Integrates smart lighting scene controls (Welcome, Meeting, Energy-Saving, All-Off) with daylight harvesting across open offices and meeting rooms, promoting daylight-first habits and user practices like powering down lights and workstations upon leaving.

  Operational Governance & Maintenance Practices:

PV System & Cooling Plant Maintenance Protocols: Establish routine inspection and cleaning protocols for the 7,852.71 m² PV installation (rooftop monocrystalline and facade CdTe thin-film) and cooling plant (design SEER-sys 6.0) to ensure long-term peak generation and efficiency.
Elevator Group Dispatch & Nighttime Standby Management: The 21 passenger elevators and 1 freight elevator (ISO Class A certified) utilize intelligent group control and regenerative energy feedback (recovering 25%–45% of braking power). During off-peak and nighttime hours, unused elevator banks and public lighting circuits are automatically shut down to minimize standby energy consumption.