02 Geyser Blanket Guideline 1

8/4/2019 02 Geyser Blanket Guideline 1

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M&V Guideline forM&V Guideline forGeyser InsulationGeyser Insulation

DistributionDistribution

Jacques WheelerJacques Wheeler

Anton HarrisAnton Harris

ErnstErnst UkenUken

M&V WorkshopM&V WorkshopFeb 2009Feb 2009


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OVERVIEW

Historical Motivation - DSM

Geyser Blanket issues, Results

& Procedures CPUT & DSM

M&V Standardised Tool for

Geyser & Pipe Insulation - NWU


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WHY GEYSER BLANKETS ?

ESKOM has to save 10% - 20% electricityimmediately for the next 5 -10 years

Govt aims to convert 1m geysers to solarthermal to save 600 MW, but industry onlymanufactures 30 000 geysers pa

Hence, Eskom sponsored 200 000 GeyserBlankets to the Western Cape during 2006

power outages to reduce standing losses. During M&V audits, CPUT M&V team also

advised householders to have temps

set at 550C


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Geyser insulation test at CPUTGeyser insulation test at CPUT


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CommentsComments

Smaller impact on standing losses inSmaller impact on standing losses in

warmer climates & lower set pointswarmer climates & lower set points

Geysers scattered over a large area,Geysers scattered over a large area,

making the metering expensivemaking the metering expensive

Therefore NWU M&V TeamTherefore NWU M&V Teamstandardised methodology to measurestandardised methodology to measure

impact of installing geyser and pipeimpact of installing geyser and pipeinsulationinsulation


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Installed Geyser Blanket


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DSM AUDIT PROCEDURE

If insulation not fastened with Al Tape - Reject

If geyser not in a working condition - Reject

If insulation not loosely fitted and material iscompressed to less than 60% of contractedthickness - Reject

If gaps in insulation are found on top of theGeyser - Reject

If >15% of geyser is not covered - Reject

If sides of geyser are not completely covered

- Reject


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DSM AUDIT PROCEDURE (cont.)

If geyser is not properly covered

at inlet and outlet ends - Reject

If pipes are not insulated for at least3 meters or up to a wall entrance - Reject

If dampness due to geyser leakageis found - Reject

If materials used differ (provide lessinsulation) from contracted material - Reject


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CPUT GEYSER BLANKET AUDIT

PROCEDURE FOR GEYSERS & PIPES Measure water temp from tap nearest

geyser, after running water for 1 min Is blanket material SABS approved ?

Inspect blanket installation for :

Coverage (


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M&V RESULSTS OF FIRST 200 000

GEYSER BLANKET INSTALLATIONS 51.9% Outlet pipes had


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NWU STANDARDISEDNWU STANDARDISED

METHODOLOGY FOR GUIDELINEMETHODOLOGY FOR GUIDELINE

BeforeBefore andand afterafter

testing on a sampletesting on a sampleof 9 identical andof 9 identical andadjustable geysersadjustable geysers

(100 litre/2 kW) in(100 litre/2 kW) inapartment complexapartment complex

inin

PotchefstroomPotchefstroom


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Methodology (cont.)Methodology (cont.)Baseline criteria :Baseline criteria :

Geyser temp set pointGeyser temp set point Ambient tempAmbient temp

Water usageWater usage Size of geyserSize of geyser

Geyser Blanket characteristicsGeyser Blanket characteristics


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Methodology (cont.)Methodology (cont.)Metering:Metering:

Electricity consumptionElectricity consumption

Hot water temperatureHot water temperature

Electrical

energy

measurement

Temperature

measurement


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ENERGY USE (Uninsulated and Insulated)vs OUTSIDE TEMP


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Methodology : Geyser and pipeMethodology : Geyser and pipe

insulation distribution projectsinsulation distribution projects Geyser (size and type)Geyser (size and type)

Temperature (geyser setTemperature (geyser set--point andpoint andambient)ambient)

Number of geysersNumber of geysers

Location of geysers (inside, outside or inLocation of geysers (inside, outside or in

ceiling void)ceiling void)

Insulation (type and percentage coverage)Insulation (type and percentage coverage) Decay rateDecay rate


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Methodology (cont) : Geyser and pipeMethodology (cont) : Geyser and pipe

insulation distribution projectsinsulation distribution projects Characterisation and metering procedureCharacterisation and metering procedure

Geyser set point (Ts)Geyser set point (Ts)Ambient temperature (Ta)Ambient temperature (Ta)

Power consumption (kWh)Power consumption (kWh)

Measurements on geyser:Measurements on geyser:

Without geyser blanketWithout geyser blanket

With geyser blanketWith geyser blanketWith GB and 3m pipe insulationWith GB and 3m pipe insulation

FORM


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FORMMetering procedure With blanket : (repeat for

& characterisation each type of insulator)


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Geyser Insulation M&V ToolGeyser Insulation M&V Tool

Inputs into the statistical model :Inputs into the statistical model :

Number of geysersNumber of geysers Set pointSet point

Size of geyserSize of geyser

Type/make of geyserType/make of geyser

Location of geyserLocation of geyser

Ambient temperatureAmbient temperature


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Geyser Insulation M&V ToolGeyser Insulation M&V Tool

Inputs into the statistical model (cont.):Inputs into the statistical model (cont.):

Type of insulationType of insulation % coverage of geyser with blanket% coverage of geyser with blanket

% coverage of pipe with insulation% coverage of pipe with insulation

Decay rateDecay rate


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Geyser Insulation M&V ToolGeyser Insulation M&V ToolMM--values, characteristic tovalues, characteristic to geysergeyser size ;size ;

geyser typegeyser type ; and; and insulationinsulation typetype :: M1M1without GBwithout GB

M2M2with GBwith GB

M3M3with GB and pipewith GB and pipe insulationinsulation

Output :Output :

BaselineBaseline

hourly Watt valueshourly Watt values

ActualActualhourly Watt valueshourly Watt values

S G


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Using Standardised Tool for GeyserUsing Standardised Tool for Geyser

insulation distribution projectsinsulation distribution projectsSTEPS :STEPS :

1: Complete fieldworker forms1: Complete fieldworker forms2: Enter fieldworker forms into application2: Enter fieldworker forms into application

3: Generate results using the tool3: Generate results using the tool

4: Conduct follow4: Conduct follow--up visit (decay rate)up visit (decay rate)

5: Enter follow5: Enter follow--up results into applicationup results into application

6: Generate results using the tool6: Generate results using the tool


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Fieldworker form :GEYSER INSULATION

Fi ld k f


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Fieldworker form :

DECAY RATE of geyser insulation


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TABLE :

Documents

02 Geyser Blanket Guideline 1