Program Overview Technology Overview Energy Savings Customer Benefits 1 What is DEPACC Program Overview Technology Direct Evaporative PreCooling for Air Cooled Condensers used with unitary DX air conditioning equipment typically RTUs ID: 468937
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Advanced Direct Evaporative Pre-Cooling for Air Cooled Condensers (DEPACC)
Program OverviewTechnology OverviewEnergy SavingsCustomer Benefits
1Slide2
What is DEPACC? – Program Overview
Technology: Direct Evaporative Pre-Cooling for Air Cooled Condensers used with unitary DX air conditioning equipment, typically RTUsNew for 2014 – All A
ir-cooled ChillersProgram: 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 nonresidentialDedicated data centers must apply through custom processMinimal system size is 10 tons Incentive is $100/ton
2Slide3
DEPACC – Technology Overview
Evaporative pre-cooling:Cools hot outside air before cooling the condenser coilsAC system operates as if it were 20
O or more cooler at the coil than ambient dry bulbTypical results in 15 – 30% improvement in cooling energy efficiency
3Slide4
Two Types of Systems
Mist with saturated membrane – no sump or recirculation Saturated membrane with sump and recirculation
4Slide5
Qualified Solutions
5
5
Once Through Systems
Recirculation Systems Slide6
System Providers & Installations
6
HydrEVAP
by RCF Inc., distributed by ATEC/
Indirex
EVAPORCOOL by Evaporcool Inc. distributed by Evaporcool
Dual Cool by Integrated Comfort Inc., distributed by ATEC/
Indirex
Smart Mist by CloudburstSlide7
Program Eligibility Requirements
DX RTU and Air-Cooled ChillersSystem Size not less than 10
tons cooling capacityEvaporative 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
7Slide8
Targeted Building Types
8Program Savings per ton of cooling are correlated with building use type
and location
Hospitals, Lodging & Offices yield highest savings
Expected Annual Savings by Building Type
per Ton
$/ton
Front Range
Western Slope
PSC-SGL
PSC- SG & STOU
PSC-SGL
PSC- SG & STOU
Education - Community College
$44
$29
$51
$34
Education - Secondary School
$27
$18
$32
$21
Education - University
$59
$39
$68
$46
Health/Medical - Clinic
$50
$33
$58
$39
Health/Medical - Hospital
$97
$65
$113
$75
Lodging
$81
$54
$95
$63
Office
$66
$44
$77
$51
Retail
$59
$39
$68
$45 Slide9
Targeted Equipment – RTUs
Larger Systems are somewhat betterInstalled cost per unit diminishes as system size increases
Key Variables
Water available on the roof
Size of the equipment
Roof accessibility for contractor
9Slide10
Breadth of Energy Bill Savings
10Cost Savings: $44 to $115 / ton annual savings
Simple Payback: Less than 2 yearsSlide11
Representative Project Energy Savings
11Denver 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 averageSlide12
Representative Project Energy Savings
12Denver 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
SavingsSlide13
What are the Customer Benefits?
DEPACC program can deliver good ROI and reliable savingsTypical 1-2 YR Simple PaybacksProven improvements in Air Conditioner performanceCooler 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-upSimplifies & Reduces condenser coil cleaningEnhances life of the DX unitReducing head pressureProtects contamination of condenser coils
Can reduce
the need for over-designing new and existing building
13Slide14
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
f
or
r
ebate
Contact Cypress for assistance
14Slide15
Contact Us
www.precoolandsave.com DEPACCsupport@cyp-res.com(877) 811-870015