Intent
To reduce ozone depletion and support early compliance with the Montreal Protocol while minimizing direct contributions to climate change.
Requirements
Option 1. No refrigerants or low-impact refrigerants (1 point)
Do not use refrigerants, or use only refrigerants (naturally occurring or synthetic) that have an ozone depletion potential (ODP) of zero and a global warming potential (GWP) of less than 50.
OR
Option 2. Calculation of refrigerant impact (1 point)
Select refrigerants that are used in heating, ventilating, air-conditioning, and refrigeration (HVAC&R) equipment to minimize or eliminate the emission of compounds that contribute to ozone depletion and climate change. The combination of all new and existing base building and tenant HVAC&R equipment that serve the project must comply with the following formula:
IP units
|
SI units
|
| Calculation definitions for LCGWP + LCODP x 105 ≤ 100 (IP units) |
Calculation definitions for LCGWP + LCODP x 105 ≤ 13 (SI units) |
|---|---|
| LCODP = [ODPr x (Lr x Life +Mr) x Rc]/Life | LCODP = [ODPr x (Lr x Life +Mr) x Rc]/Life |
| LCGWP = [GWPr x (Lr x Life +Mr) x Rc]/Life | LCGWP = [GWPr x (Lr x Life +Mr) x Rc]/Life |
| LCODP: Lifecycle Ozone Depletion Potential (lb CFC 11/Ton-Year) |
LCODP: Lifecycle Ozone Depletion Potential (kg CFC 11/(kW/year)) |
| LCGWP: Lifecycle Direct Global Warming Potential (lb CO2/Ton-Year) |
LCGWP: Lifecycle Direct Global Warming Potential (kg CO2/kW-year) |
| GWPr: Global Warming Potential of Refrigerant (0 to 12,000 lb CO2/lbr) |
GWPr: Global Warming Potential of Refrigerant (0 to 12,000 kg CO2/kg r) |
| ODPr: Ozone Depletion Potential of Refrigerant (0 to 0.2 lb CFC 11/lbr) |
ODPr: Ozone Depletion Potential of Refrigerant (0 to 0.2 kg CFC 11/kg r) |
| Lr: Refrigerant Leakage Rate (2.0%) |
Lr: Refrigerant Leakage Rate (2.0%) |
| Mr: End-of-life Refrigerant Loss (10%) |
Mr: End-of-life Refrigerant Loss (10%) |
| Rc: Refrigerant Charge (0.5 to 5.0 lbs of refrigerant per ton of gross AHRI rated cooling capacity) |
Rc: Refrigerant Charge (0.065 to 0.65 kg of refrigerant per kW of AHRI rated or Eurovent Certified cooling capacity) |
| Life: Equipment Life (10 years; default based on equipment type, unless otherwise demonstrated) |
Life: Equipment Life (10 years; default based on equipment type, unless otherwise demonstrated) |
For multiple types of equipment, calculate a weighted average of all base building HVAC&R equipment, using the following formula:
| IP units | SI units | ||
|---|---|---|---|
| ∑ ( LCGWP + LCODP x 105 ) x Qunit | ≤ 100 | ∑ ( LCGWP + LCODP x 105 ) x Qunit | ≤ 13 |
| Qtotal | Qtotal | ||
| Calculation definitions for [ ∑ (LCGWP + LCODP x 105) x Qunit ] / Qtotal ≤ 100 |
Calculation definitions for [ ∑ (LCGWP + LCODP x 105) x Qunit ] / Qtotal ≤ 13 |
|---|---|
| (IP units) | (SI units) |
| Qunit = Gross AHRI rated cooling capacity of an individual HVAC or refrigeration unit (Tons) | Qunit = Eurovent Certified cooling capacity of an individual HVAC or refrigeration unit (kW) |
| Qtotal = Total gross AHRI rated cooling capacity of all HVAC or refrigeration | Qtotal = Total Eurovent Certified cooling capacity of all HVAC or refrigeration (kW) |
Meet Option 1 or 2 for all HVAC systems.
Stores with commercial refrigeration systems must comply with the following.
- Use only non-ozone-depleting refrigerants.
- Achieve an average HFC refrigerant charge of no more than 1.75 pounds of refrigerant per 1,000 Btu/h (2.72 grams of refrigerant per kW) total evaporator cooling load.
- Achieve a store-wide annual refrigerant emissions rate of no more than 15%.
Alternatively, stores with commercial refrigeration systems may provide proof of attainment of EPA GreenChill’s silver-level store certification for fully operational food retail stores.
Join LEEDuser
Ask questions, share tips, and get notified of new forum posts by joining LEEDuser, a tool developed by BuildingGreen and supported by USGBC!
0 commentsLeave a comment