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Advanced Direct Evaporative Pre-Cooling for Air Cooled Condensers (DEPACC)

Advanced Direct Evaporative Pre-Cooling for Air Cooled Condensers (DEPACC). Program Overview Technology Overview Energy Savings Customer Benefits. What is DEPACC? – Program Overview.

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Advanced Direct Evaporative Pre-Cooling for Air Cooled Condensers (DEPACC)

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  1. Advanced Direct Evaporative Pre-Cooling for Air Cooled Condensers (DEPACC) Program Overview Technology Overview Energy Savings Customer Benefits

  2. What is DEPACC? – Program Overview • Technology: Direct Evaporative Pre-Cooling for Air Cooled Condensers used with unitary DX air conditioning equipment, typically RTUs • New for 2014 – All Air-cooled Chillers • Program: Prescriptive incentive program to increase the adoption of evaporative pre-condensing as a retrofit measure • Part of the existing Xcel Cooling Efficiency Program • Preapproval is not required • Any nonresidential • Dedicated data centers must apply through custom process • Minimal system size is 10 tons • Incentive is $100/ton

  3. DEPACC – Technology Overview • Evaporative pre-cooling: • Cools hot outside air before cooling the condenser coils • AC system operates as if it were 20O or more cooler at the coil than ambient dry bulb • Typical results in 15 – 30% improvement in cooling energy efficiency

  4. Two Types of Systems Mist with saturated membrane – no sump or recirculation Saturated membrane with sump and recirculation

  5. Qualified Solutions Once Through Systems Recirculation Systems 5

  6. System Providers & Installations Dual Cool by Integrated Comfort Inc., distributed by ATEC/Indirex HydrEVAP by RCF Inc., distributed by ATEC/Indirex Smart Mist by Cloudburst EVAPORCOOL by Evaporcool Inc. distributed by Evaporcool

  7. Program Eligibility Requirements • DX RTU and Air-Cooled Chillers • System Size not less than 10 tons cooling capacity • Evaporative pre-condensing system must provide a minimum of 75% temperature reduction of the potential total wet bulb depression available at all ambient conditions when the compressor operates. • DEPACC system shall be configured such that no water mist or spray to contact or accumulate on the condenser coils. • DEPACC system must include a mechanical or chemical water treatment system to prevent scaling • System should be equipped with controls that limit water use • Dedicated data center facilities are ineligible as prescriptive measure and must use Xcel custom measure process

  8. Targeted Building Types • Program Savings per ton of cooling are correlated with building use type and location • Hospitals, Lodging & Offices yield highest savings

  9. Targeted Equipment – RTUs Key Variables • Water available on the roof • Size of the equipment • Roof accessibility for contractor Larger Systems are somewhat better • Installed cost per unit diminishes as system size increases

  10. Breadth of Energy Bill Savings • Cost Savings: • $44 to $115 / ton annual savings • Simple Payback: • Less than 2 years

  11. Representative Project Energy Savings Denver Office Building 150,000 sf 320 tons Cooling (4-80 ton RTU’s) Peak Summer Week 40% Cooling Energy Savings Annual 19% Cooling Energy Savings 2,400 kWh / week average

  12. Representative Project Energy Savings Denver Office Building 150,000 sf 320 tons Cooling (4-80 ton RTU’s) Peak Summer Week 15% Total Building Energy Savings Annual 4% Total Building Energy Savings 2,400 kWh / week average Savings

  13. What are the Customer Benefits? • DEPACC program can deliver good ROI and reliable savings • Typical 1-2 YR Simple Paybacks • Proven improvements in Air Conditioner performance • Cooler low side temperatures which allow for colder conditioned air • Reduce energy consumption 15-20% • Reduce energy peak demand typically 15-35% • Help protect coils from damage and debris build-up • Simplifies & Reduces condenser coil cleaning • Enhances life of the DX unit • Reducing head pressure • Protects contamination of condenser coils • Can reduce the need for over-designing new and existing building

  14. Project Scoping Initial Customer Qualification Screen: • System equal to or larger than nominal 10 tons of cooling • Building type and location Project Delivery • Customer or HVAC Service Contractor obtain equipment information • Contact DEPACC system provider for equipment pricing • Utility bill records & tariff information if available • Prepare Economic ProForma: Energy at Risk or other tool • Execute Installation Contract & submit for rebate • Contact Cypress for assistance

  15. Contact Us www.precoolandsave.com DEPACCsupport@cyp-res.com (877) 811-8700

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