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Commercial Variable Speed Swimming Pool Pump

Jason Wang

Cal TF Work Paper Presentation

October 23, 2014

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AgendaObjective: Seeking TF approval of draft workpaper

• Measure Description

• Work Paper Methodology

• Results

• Issues and Concerns

• Questions or Comments

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Measure DescriptionMeasure Case

Variable speed pool pump• Integrated pump, motor, and

controller unit• Can be programmed for different

speeds at different times• High efficiency motor

Base CaseSingle speed pool pump• Typically operates 24/7• Size ranges from 0.5 to 3 HP• Fixed speed of 3,450 rpm

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Measure DescriptionUnits: Per horsepower

Measure Application and Delivery Type

1. Direct Install (ER or ROB depending on pump condition)

2. Downstream Prescriptive Rebate (ROB)

Eligibility• Climate zones: All• Building types: Hotels, Motels, Assembly

Target Market• Lodging facilities with standard (non-Olympic) size pools• Assemblies: Fitness centers, clubs, public pools, etc.

Market Potential

About 8,700 commercial pools in SCE territory

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Measure DescriptionMeasure Costs

• Baseline cost (material + labor): $700• Measure cost: $1,650• Incremental cost: $950

EUL

10 years (DEER EUL ID: OutD-PoolPump)

Net-to-Gross

0.85 (DEER EUL ID: ET-Default)

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Work Paper MethodologyBaseline Data Collection

Building type Sites surveyed

Parameters Market Assessment

Lodging 50 • Operating schedules• Equipment specs• Pool system

characteristics• Voltage, current,

power factor

Good candidates. Mostly single speed pumps ≤ 3 HP, operating 24/7.Assemblies 31

Schools 46 Pools too large

Baseline Methodology – Early Retirement

𝑃𝑏𝑎𝑠𝑒 [𝑘𝑊 ]=𝑉 𝑅𝑀𝑆 [𝑉 ]∗ 𝐼𝑅𝑀𝑆 [𝑎𝑚𝑝𝑠 ]∗𝑝𝑓 ∗ 1𝑘𝑊1,000𝑊ER:

𝐸𝑏𝑎𝑠𝑒 [ h𝑘𝑊 ]=𝑃𝑏𝑎𝑠𝑒 [𝑘𝑊 ]∗𝑃𝑢𝑚𝑝𝐻𝑜𝑢𝑟𝑠[ h𝑜𝑢𝑟𝑠𝑑𝑎𝑦 ]∗ h𝐴𝑛𝑛𝑢𝑎𝑙𝑆𝑐 𝑒𝑑𝑢𝑙𝑒 [ 𝑑𝑎𝑦𝑠𝑦𝑒𝑎𝑟 ]

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Work Paper MethodologyBaseline Methodology – Replace on Burnout

𝑃𝑏𝑎𝑠𝑒 [𝑘𝑊 ]=𝑃𝑏𝑎𝑠𝑒 [𝑘𝑊 ]∗ 𝐴𝑣𝑔𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑐𝑦 ,𝑛𝑜𝑛𝑐𝑜𝑑𝑒𝑐𝑜𝑚𝑝𝑙𝑖𝑎𝑛𝑡𝐴𝑣𝑔𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑐𝑦 ,𝑐𝑜𝑑𝑒𝑐𝑜𝑚𝑝𝑙𝑖𝑎𝑛𝑡

ROB:

HP Non Qualifying

Title 20 Qualifying

Adjustment Factor

0.5 62% 77% 81%0.75 63% 76% 83%

1 66% 76% 87%1.5 65% 76% 86%2 67% 79% 85%

2.5 70% 77% 91%3 70% 79% 89%

Codes and Standards Enhancement study

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Work Paper MethodologyMeasure Data Collection

CEC System Curves

• System Curve C used to represent pool plumbing system

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Work Paper MethodologyMeasure Data Collection

CEC Pool Pump Test Database

• Variable speed pump power consumption

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Work Paper MethodologyMeasure Methodology

Code Requirements (Public Pools)

• Title 24: Must be capable of 6-hour turnover

• Title 22: Cannot lower flow below 65% of Title 24 levels

• Title 20: Two speed required for Res pool pumps ≥ 1 hp

• Proposed: SS ≥ 70% efficiency, VS ≥ 80% @ full, ≥ 70% at half

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Work Paper MethodologyMeasure Methodology

𝑄𝑐𝑙𝑜𝑠𝑒𝑑 [𝑔𝑝𝑚 ]= 𝑃𝑜𝑜𝑙𝑉𝑜𝑙𝑢𝑚𝑒 [𝑔𝑎𝑙]

24h𝑜𝑢𝑟𝑠

𝑡𝑢𝑟𝑛𝑜𝑣𝑒𝑟∗60 𝑚𝑖𝑛

h𝑜𝑢𝑟

𝐸𝑚𝑒𝑎𝑠𝑢𝑟𝑒 [ h𝑘𝑊 ]=(𝑃𝑚𝑒𝑎𝑠𝑢𝑟𝑒 ,𝑜𝑝𝑒𝑛 [𝑘𝑊 ]∗𝐴𝑑𝑗𝑢𝑠𝑡𝑒𝑑𝑂𝑝𝑒𝑛𝐻𝑜𝑢𝑟𝑠 [ h𝑜𝑢𝑟𝑠𝑑𝑎𝑦 ]+¿𝑃𝑚𝑒𝑎𝑠𝑢𝑟𝑒 ,𝑐𝑙𝑜𝑠𝑒𝑑 [𝑘𝑊 ]∗𝐶𝑙𝑜𝑠𝑒𝑑𝐻𝑜𝑢𝑟𝑠 [ h𝑜𝑢𝑟𝑠

𝑑𝑎𝑦 ])∗ h𝐴𝑛𝑛𝑢𝑎𝑙𝑆𝑐 𝑒𝑑𝑢𝑙𝑒 [ 𝑑𝑎𝑦𝑠𝑦𝑒𝑎𝑟 ]

𝑃𝑚𝑒𝑎𝑠𝑢𝑟𝑒 , 𝑐𝑙𝑜𝑠𝑒𝑑

Pool Closed – Required Flow Rate (minimum 25 gpm, minimum 0.12 kW)

Pool Open – Required Flow Rate (minimum 25 gpm)

𝑄𝑜𝑝𝑒𝑛 [𝑔𝑝𝑚 ]= 𝑃𝑜𝑜𝑙𝑉𝑜𝑙𝑢𝑚𝑒[𝑔𝑎𝑙 ]

6h𝑜𝑢𝑟𝑠

𝑡𝑢𝑟𝑛𝑜𝑣𝑒𝑟∗60 𝑚𝑖𝑛

h𝑜𝑢𝑟𝑃𝑚𝑒𝑎𝑠𝑢𝑟𝑒 ,𝑜𝑝𝑒𝑛

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Results

Application Type kWh Savings kW Reduction Therm Savings

ER 7,441 0.59 0

ROB 5,586 0.36 0

Results Averaging

• Exclude existing multi-speed pumps

• Exclude pumps > 3 HP

• Exclude pools where a single 3 HP pump cannot meet required flow rate

• Straight average

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Issues and Concerns – Cal TF Comments

Abstract Review Comments from the Cal TF

Health specifications

• Methodology ensures that variable speed pool pumps meet health code.

Persistence issues

• Technician errors will be reduced by using qualified contractors and

offering training.

X ECM motor retrofit

• This is a separate measure to be considered.

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Issues and Concerns – Future Updates

Field Testing in Progress

• Five sites currently being tested and monitored

• Preliminary results:

Site kWh Savings kW Reduction

1 TBD 0.40

2 TBD TBD

3 TBD TBD

4 TBD TBD

5 TBD TBD

Work Paper (ER) 7,441 0.59

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Additional material and labor costs

• Permitting fees: Program works with county to reduce fees.

• Replacement flow meters, valves, etc. may be required. Costs are not

borne by program.

Turnover Requirements

• Many pumps not meeting turnover requirement (6 hours/turnover).

• Not SCE’s role to enforce code.

Issues and Concerns – Future Updates

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Questions or Comments?