Energy Projects 2006-2008Energy & CO2 Retrofits

Puerto Rico

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

Before

After

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

Before

After

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

Before

After

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

Before

After

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

Before

After

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

Before

After

Summary$22.6M in Construction$3.8M in Annual Energy

Savings22,500 tons CO2 Reduced

Equivalent to removing 3,750 cars from the road

or planting 900,000 trees