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Hub / Commercial Clean Tech & MEP / GEB & Automated Demand Response

Commercial GEB & Automated Demand Response Sizer

Size commercial Grid-Interactive Efficient Buildings (GEB) and OpenADR 2.0b client gateways. Model HVAC cooling drift, variable speed fan turndown, bi-level lighting curtailment, EV charger throttling, utility capacity reservation payments, and Title 24 / ASHRAE 189.1 compliance.

OpenADR 2.0b / Title 24 §110.12

1. Baseline Facility Load Profile

Peak Facility Demand (kW): 650 kW

100 kW2,000 kW4,000 kW

Building Gross Area (SF):

Summer On-Peak Demand ($/kW):

2. Automated Load Shed Strategies

HVAC Space Temp Drift (+3°F Setback): 18.0%

+1°F (Minimal)+3°F (Standard)+5°F (Max)

ASHRAE 55 Adaptive Comfort compliant; paired with 2-hr morning pre-cooling.

Bi-Level Daylight / LED Dimming (%): 25.0%

Curtailed via 0-10V / DALI network lighting controls across perimeter zones.

Smart EV Charger & Plug Curtailment (kW): 35 kW

OCPP 2.0.1 automated charge rate throttling to 50% power during utility events.

3. Demand Response Tariffs & Rebates

Capacity Reservation ($/kW/mo): Paid year-round or summer (6 mo)

Event Energy Payment ($/kWh): Performance payment during dispatches

Annual DR Events (Hours): Typical 12-15 events @ 3-4 hrs

Utility ADR Hardware Rebate ($/kW): Subsidizes OpenADR VEN / BMS

24-Hour Automated Demand Response Dispatch Curve

Simulation of baseline load, pre-cooling charge, and OpenADR 2.0b curtailment shed

Baseline Pre-Cooling Curtailed Event

Verified Shed Capacity 162 kW (-24.9%)

Curtailment Event Load 488 kW

Title 24 Readiness Certified Compliant

Curtailment Load Inventory Breakdown 162 kW Shed

HVAC Chiller / Packaged DX Turndown: 92 kW (56.8%)

Lighting Network Dimming & Daylighting: 35 kW (21.6%)

EV Charging Throttling & Non-Critical Plugs: 35 kW (21.6%)

Annual Utility Revenue Stacking & Payback $31,248 / yr

ADR System CapEx $42,000 VEN Gateway + BMS

Utility Rebate -$32,400 Automated Tech Rebate

Net Out-Of-Pocket $9,600 After Direct Rebate

Simple Payback 0.31 Yrs < 4 Months Payback

1. Capacity Reservation (Summer 6-mo @ $8.50/kW): $8,262 / yr

2. Performance Energy Payments (48 hrs @ $0.75/kWh): $5,832 / yr

3. Coincident Demand Charge Avoidance ($21.50/kW): $17,154 / yr

Engineering Basis & Compliance Standards

OpenADR 2.0b Protocol Architecture OpenADR (Automated Demand Response) facilitates machine-to-machine signaling between the Utility Virtual Top Node (VTN) and building Virtual End Node (VEN). Signals dispatch `OADR_DISTRIBUTE_EVENT` XML payloads over HTTPS/XMPP to trigger BMS curtailment without human intervention.

ASHRAE 189.1 & Title 24 Section 110.12 Mandates that newly constructed commercial buildings (≥10,000 SF) must include centralized automated demand responsive controls capable of automatically shedding 15% or more of the building's electrical load in response to utility demand response signals.

Thermal Pre-Cooling Dynamics To prevent indoor comfort degradation during 3-4 hour summer peak curtailment windows, the building mass is pre-cooled by -2°F to -3°F during off-peak morning hours (9 AM – 12 PM). The stored thermal inertia allows zone temperatures to float without exceeding ASHRAE 55 comfort limits.