1. Energy Projects
2006-2008
Energy & CO2 Retrofits
Puerto Rico

2.  Current Situation
 Existing chilled & reheat water plants using air-cooled chillers
and oil-fired boilers wasting energy and producing high CO2
 Proposed Solution
 $4.4M retrofit with water-cooled chiller and heat pump along
with upgraded distribution pumps/piping
 Benefits of the Retrofit
 Annual CO2 reduction of 7,000 tons
 Annual Energy Cost Savings of $1.1M (27% IRR)
 Corrected chilled water flow problems – Reliability
Puerto Rico

3. Before
After

4.  Current Situation
 Existing reheat water plant uses oil-fired boilers wasting energy and
producing high CO2
 Expected future chiller load exceeds current plant capabilities
 Proposed Solution
 $7.2M retrofit with heat pump for energy savings
 Provide additional water-cooled capacity with upgraded distribution
pumps/piping
 Benefits of the Retrofit
 Annual CO2 reduction of 3,500 tons
 Annual Energy Cost Savings of $630K (15% IRR)
 Additional capacity to meet future load - Redundancy
 Corrected chilled water flow problems – Reliability
Puerto Rico

5. Before
After

6.  Current Situation
 Existing chilled & reheat water plants using air-cooled chillers and oil-
fired boilers wasting energy and producing high CO2
 Site served by two independent chiller plants
 Proposed Solution
 $4.2M retrofit with heat pump for energy savings
 Upgrade distribution pumps/piping to consolidate central chiller
plants
 Benefits of the Retrofit
 Annual CO2 reduction of 5,300 tons
 Annual Energy Cost Savings of $840K (19% IRR)
 Corrected flow problems – Reliability
 Reduced operations and maintenance – Cost Savings
Puerto Rico

7. Before
After

8.  Current Situation
 Existing chilled & reheat water plants using air-cooled chillers and
propane-fired boilers wasting energy and producing high CO2
 Proposed Solution
 $3.0M retrofit with water-cooled chiller and heat pump along with
upgraded distribution pumps/piping and AHUs
 Benefits of the Retrofit
 Annual CO2 reduction of 2,400 tons
 Annual Energy Cost Savings of $590K (20% IRR)
 Corrected chilled & hot water flow problems – Reliability
Puerto Rico

9. Before
After

10.  Current Situation
 Existing chilled water plant using air-cooled chillers
wasting energy and producing high CO2
 Proposed Solution
 $1.6M retrofit with water-cooled chiller along with
upgraded distribution pumps/piping and AHUs
 Benefits of the Retrofit
 Annual CO2 reduction of 2,300 tons
 Annual Energy Cost Savings of $330K (21% IRR)
Puerto Rico

11. Before
After

12.  Current Situation
 Existing chilled water plant using air-cooled chillers
wasting energy and producing high CO2
 Proposed Solution
 $2.2M retrofit with water-cooled chiller along with
upgraded distribution pumps/piping and AHUs
 Benefits of the Retrofit
 Annual CO2 reduction of 2,000 tons
 Annual Energy Cost Savings of $300K (20% IRR)
Puerto Rico

13. Before
After

14. Summary
$22.6M in Construction
$3.8M in Annual Energy Savings
22,500 tons CO2 Reduced
Equivalent to removing 3,750 cars
from the road
or planting 900,000 trees