Utilities, Power & Environmental Plant
How the Complex generates, distributes, and guarantees electrical power; conditions atmosphere for 64 greenhouse zones; drives the grow-light and CO₂ systems; and rides through a grid failure without ever letting GCL-4 go dark.
Plant Telemetry
Power Generation & Distribution Mix
The Complex runs a hybrid on-site generation portfolio backstopped by a utility grid tie. The dominant source is the Biophotonic Canopy Array — engineered photosynthetic membranes laminated into the dome and grid roofs that convert the same spectrum the plants use into DC power — supplemented by conventional photovoltaics, a biogas combined-heat-and-power (CHP) set fed by green-waste digestion, and the grid. On-site sources cover 61% of demand; the grid tie is sized to carry full facility load if all on-site generation is lost.
| Source | Type | Nameplate | Typical Output | Role | Status |
|---|---|---|---|---|---|
| Biophotonic Canopy Array | Engineered photosynthetic film (DC) | 18.0 MW | 11.4 MW | Primary renewable · daylight-tracking | ● Online |
| Photovoltaic Roof Field | Tandem perovskite-Si PV | 9.5 MW | 5.8 MW | Secondary renewable | ● Online |
| Biogas CHP Set | Green-waste digester → 2× recip. gensets | 8.0 MW | 6.2 MW | Dispatchable base + waste heat to HVAC | ● Online |
| Utility Grid Tie | 33 kV dual-feed substation | 40.0 MW | 15.2 MW | Backstop & import balance | ● Both feeds live |
| Emergency Gensets | 2× 2.5 MW diesel (N+1) | 5.0 MW | 0 (standby) | Life-safety + containment on grid loss | ◐ Standby · tested wk |
| Grid Battery (BESS) | LFP storage | 6.0 MW / 18 MWh | ±4.1 MW | Peak-shave, ride-through, frequency | ● 88% SoC |
| TOTAL DISPATCHABLE | — | 52.0 MW on-site + 40 MW grid | 38.6 MW served | — | ● Green |
Distribution is a dual-bus 11 kV ring main with automatic bus-coupler transfer. Containment-critical loads (Bio-Vault HVAC, cascade fans, security, BMS, MDF nodes) sit on a segregated Essential Bus that is never load-shed and is the first to receive UPS and genset power.
Facility Load Table
Connected load by system at typical operating point. Grow-lights and HVAC together account for roughly three-quarters of facility demand, which is why both are on aggressive efficiency control by Engineering and CHLORA.
| Load System | Connected | Typical Draw | % of Load | Bus | Shed Priority |
|---|---|---|---|---|---|
| Grow-Light System (LED arrays) | 22.0 MW | 16.2 MW | 42% | Normal | Sheddable · dim-first |
| HVAC & Climate Plant | 14.0 MW | 9.8 MW | 25% | Mixed | Partial shed |
| Hydroponics & Pumps | 5.5 MW | 3.6 MW | 9% | Essential (vault loop) | Protected |
| Bio-Vault Containment (Z2) | 3.2 MW | 2.7 MW | 7% | Essential | Never shed |
| Phyto-Synthesis Bay (Z5) | 4.5 MW | 2.4 MW | 6% | Mixed | Batch-dependent |
| Data / MDF / Monitoring | 1.8 MW | 1.5 MW | 4% | Essential | Never shed |
| Security & Access Control | 0.9 MW | 0.7 MW | 2% | Essential | Never shed |
| Lighting, Lifts, Quarters, Misc. | 3.6 MW | 1.7 MW | 5% | Normal | Sheddable |
Backup & UPS for Containment
Containment power is engineered to a "no-break, no-dark" standard. On loss of both grid feeds, the Essential Bus is carried instantaneously by online double-conversion UPS, the emergency gensets start and reach load in ≤10 s, and the BESS bridges any genset shortfall. The Bio-Vault cascade fans and HVAC carry a dedicated 30-minute UPS reserve — far longer than the genset cutover — so that even a failed genset start does not collapse the negative-pressure cascade before manual intervention.
UPS Double-Conversion
2× 1.5 MW N+1 on the Essential Bus. Zero-break transfer. 30 min autonomy for Z2 Bio-Vault containment loads.
Emergency Gensets
2× 2.5 MW diesel, N+1, 72 h fuel on-site. Auto-start on bus undervoltage; carry full Essential Bus.
Grid Battery (BESS)
6 MW / 18 MWh. Rides through transfer transients and covers genset shortfall or single-set failure.
HVAC & Climate Plant per Greenhouse Zone
Each of the 64 greenhouse zones is an independently-controlled climate cell. Air handling is delivered by twelve central air-handling units (AHUs) feeding zone terminal units, with biogas-CHP waste heat and a 4-pipe chilled/hot water network providing thermal energy. Setpoints are held by the Bio-Systems control loop against the bands catalogued in Botanical Metrics; Facilities owns the plant that makes those setpoints achievable.
| Climate Band | Grids | Temp Setpoint | RH Setpoint | CO₂ Target | Air Changes/hr |
|---|---|---|---|---|---|
| Temperate Foliage | A, D (24 zones) | 18–24 °C | 60–70% | 600–800 ppm | 8 ACH |
| Tropical / High-Humidity | B, E (20 zones) | 26–32 °C | 78–85% | 800–1000 ppm | 12 ACH |
| Arid / Succulent | C (8 zones) | 22–30 °C day / 12 °C night | 20–35% | 600 ppm | 6 ACH |
| High-Yield Forcing | F (12 zones · GCL-2) | 24–28 °C | 65–75% | 1000–1200 ppm | 15 ACH · sealed |
| Containment (Z2/Z5) | Bio-Vault / Phyto-Synth | 19–21 °C | 45–55% | ambient | 20 ACH · 100% exhaust, no recirc |
Grow-Light System
Cultivation lighting is the single largest electrical load. Each zone is fitted with tunable multi-channel LED arrays (450/660/730 nm + far-red + white) delivering up to 1,000 µmol·m⁻²·s⁻¹ PPFD at canopy, driven on per-zone photoperiod recipes. Output is dynamically dimmed by CHLORA to track the day-ahead generation forecast — when the Biophotonic Array peaks at midday, lighting runs hot; during grid-import windows it shaves. Far-red and supplemental channels are also tuned by the Spectral Canopy Array feedback loop.
- Installed: 22.0 MW connected across 64 zones · avg 344 kW/zone
- Spectral channels: 6 (deep-blue 450, red 660, far-red 730, UV-A trim, cool-white, warm-white)
- Control: per-zone DALI-over-MDF, 0–100% dimming, photoperiod recipes from the cultivar lifecycle
- Efficiency floor: arrays below 2.6 µmol/J are flagged for replacement on the maintenance program
- Load management: grow-light is "dim-first" in any shed event — never the containment loads
CO₂ Dosing
CO₂ is enriched per zone to the targets in the HVAC table to accelerate photosynthesis and yield. Supply is reclaimed from the biogas-CHP flue (scrubbed) plus bottled backup; dosing is closed-loop on per-zone NDIR sensors with hard high-limit cut-offs for occupied-space safety. Facility-average atmosphere holds at ~412 ppm; forcing zones run enriched and sealed.
Redundancy & Failover
| System | Topology | Single-Fault Behavior | Failover Time |
|---|---|---|---|
| 11 kV Distribution | Dual-bus ring, N+1 couplers | Auto bus-coupler transfer, no load loss on Essential Bus | < 1 cycle (UPS) / 4 s (mech.) |
| Grid Supply | Dual 33 kV feed, separate routes | Surviving feed carries full load | Automatic, < 200 ms |
| Bio-Vault HVAC fans | 2N (A/B fan trains) | Standby train auto-starts, cascade held | < 2 s |
| Chilled water | N+1 chillers, dual headers | Spare chiller stages in | < 90 s |
| Emergency Gensets | N+1 (2× 2.5 MW) | Single set carries Essential Bus | ≤ 10 s start |
| CO₂ supply | CHP reclaim + bottled backup | Auto-switch to bottled, dosing continues | < 5 s |
Plant Maintenance Schedule
Preventive maintenance for power and environmental plant. Full asset register and CMMS process in VC-FAC-0500.
| Asset | Interval | Task | Owner |
|---|---|---|---|
| Emergency gensets | Weekly | 30-min on-load test, fuel polish check | FAC-UTL |
| UPS / BESS | Monthly | Battery health, autonomy verification | FAC-UTL |
| AHUs / filters | Quarterly | Filter swap, coil clean, belt/bearing | FAC-UTL |
| Bio-Vault cascade fans | Monthly (A/B alt.) | Standby-train run, pressure verification | FAC-BSZ + FAC-UTL |
| Grow-light arrays | Semi-annual | PPFD/efficiency audit, driver check | FAC-GHG |
| Chillers | Annual | Refrigerant, tube clean, vibration | FAC-UTL |
| Switchgear / protection relays | Annual | Thermography, relay test, torque audit | FAC-UTL |
| CO₂ NDIR sensors | Quarterly | Calibration against reference gas | Engineering |