Premium Rooftop Unit (RTU) Retrofit Overview

August 20, 2012

RTF RTU Working Group

Mira Vowles, BPA

1

Emerging Technology (ET) Field Tests

First Two ET Field Tests Premium RTU Retrofit VRF Systems

2

Example: Heat Pump Water Heaters

3

2008Product Launched

2009Convene advisory

committee 2009Northern Tier Specification

2010-11Lab tests (NREL)

2010-12Field tests (EPRI)

2011Estimated energy savings

potential assessment

2012Program deployment

BPA & NEEANEEA emerging tech

BPA E3T, EPRI

BPA E3T, NREL

BPA emerging tech

BPA planning

BPA programs

ET Field Test Web PageDynamic list of new field tests

Eligibility requirements number of installations Pre-defined savings and

BPA provided M&V

Utility participation request link Technology briefs Marketing materials

“Go Field Test” www.bpa.gov/go/FieldTest

4

Premium Rooftop Unit (RTU) Retrofits

5

6

Premium RTU = RCx + Retrofit + Replacement

Premium RTU Retrofits –What?

Premium RTU Retrofits –What?

1. Supply Fan Control Savings– Cycling– Multi-speed– VSD

2. Demand Controlled Ventilation

3. Premium economizer control

Approved products: Transformative Wave Technology’s Catalyst, Honeywell JADE controller with DCV, VSD and speed controller, KMC FlexStat other products as approved

7

Premium RTU Retrofit Details

Unitary, single-zone RTU with an economizer greater than five tons of cooling capacity and serving a commercial facility in BPA territory

BPA ET Field Test Limited to 75

8

Premium RTU Retrofit Pre-defined Savings

Occupied hours per

yearSavings

(kWh/ton)Incentive

($/ton)2,000 - 4,000 600 $1204,001 - 8,760 1,000 $200

9

Good Premium RTU Retrofit Applications (not required)

10

Long hours of occupancy, High occupant density (# of people/SF), Varying levels of occupancy, High cooling loads, Electric heat and No energy management system Applications: big-box retail, small-box retail, offices,

grocery stores, gyms, fitness centers, places of assembly, auto dealerships, theaters, schools, casinos, bowling alleys and restaurants

Premium RTU Retrofit Research ?’s

1. What is the simplest, reliable method to quantify Premium RTU Retrofit savings?

2. Can the updated ECAM be used as the standard RTU protocol for Program evaluation?

– What are the data requirements?

3. Are there other key variables affecting savings, besides OSA temperature and hours of occupancy?

4. Other?

11

Premium RTU Retrofit Research Plan• Use the updated ECAM as a Provisional Standard

Protocol calculator on up to 125 RTUs

• Research data requirements:

i. True power, OSA temperature, plus other variables TBD

ii. One year of weekly cycling, or 6 months of pre & post data

» Recommend best practice for metering period

iii. One minute interval

12

Premium RTU Retrofit Research PlanPotential RTUG interim presentation – fall/winter?

– PNNL, DOE funded, Catalyst work

» 49 RTUs in PNW

» up to 16 heat pumps

– BPA ET Field Test status and analysis

» up to 75 RTUs

13

Updated ECAM Premium RTU Retrofit Demonstration

14