circulating block heater
DESCRIPTION
Circulating Block Heater. Alfredo Gutierrez Cal TF Work Paper Presentation October 23, 2014. Agenda. Objective: Seeking TF approval of draft workpaper Measure Description Work Paper Methodology Results Issues and Concerns Questions or Comments. Measure Description. Base Case - PowerPoint PPT PresentationTRANSCRIPT
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Circulating Block Heater
Alfredo Gutierrez
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
Circulating block heater• Integrated pump circulates heated
coolant through engine block• Leads to more uniform temperatures• Requires a smaller heating element
due to improved temperature mixing
Base CaseThermo siphon heater• Relies on temperature variation to
drive circulation which leads to non-uniform temperatures
• Generates waste heat• Only contains an electric resistance
heater
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Measure DescriptionUnits: Per unit
Measure Application and Delivery Type• Downstream Deemed (ER or ROB depending on existing equipment
age)
Eligibility• Climate zones: All• Building types: All Non-Residential
Target Market• Industrial sector• Commercial sector
Market Potential
Estimated at 300 installations in 2014 though SCE’s customized program by years end.
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Measure DescriptionMeasure Costs
• Baseline cost (material + labor): $750 – $1,500• Measure cost: $1,000 - $1,800• Incremental cost: $250 - $600
EUL
15 years (DEER EUL ID: Motors-pump)
Net-to-Gross
0.85 (DEER EUL ID: ET-Default)
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Work Paper MethodologyBaseline/Measure data collection
Baseline/Measure methodology
• kWh vs OA was collected, on average, for 2 months pre and post• Regression models were then created from site data• Average yearly temperature found for each climate zone
• 2013 CEC TMY2 weather files• Assumed 334 days of operation for the heater
• One month of downtime for maintenance
Bonneville Power Administration (BPA) Emerging Technology Case Studies• 17 Sites
• Waste Water Plants• Data Centers
• Parameters• Daily Average kWh• Outside Air (OA) Temperature• Duty Cycle
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Work Paper MethodologyBaseline Regression Model
Baseline Methodology
30 40 50 60 70 80 900
10
20
30
40
50
60
70
80
90
f(x) = − 1.35886548491878 x + 131.68406918157R² = 0.908525448576929
Daily Average kWh vs. OA
Avg kWh
Linear (Avg kWh)
Average OA Temperature (°F)
Dai
ly A
vera
ge k
Wh
h𝑘𝑊 =−1.3589∗𝑂𝐴+131.68
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Work Paper MethodologyMeasure Regression Model
Measure Methodology
25 30 35 40 45 50 55 60 65 700
10
20
30
40
50
60
70
80
f(x) = − 1.09166063421547 x + 98.4572095098951R² = 0.830772566983951
Daily Average kWh vs. OA
Avg kWh
Linear (Avg kWh)
Average OA Temperature (°F)
Dai
ly A
vera
ge k
Wh
h𝑘𝑊 =−1.0917∗𝑂𝐴+98.457
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Work Paper MethodologyYearly Average Temperature
Sensitivity Analysis• Bin Method
– Used to find the savings associated with a daily average temperature instead of yearly average temperature
• Savings found and compared between daily and yearly average temperatures for climate zone 6 and 15
Climate Zone Average Yearly Dry Bulb Temperature (°F)
6 61.5
8 63.4
9 63.5
10 63.9
13 63.8
14 62.4
15 75.2
16 51.5
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ResultsSensitivity Analysis Results• Climate Zone 6
• Climate Zone 15
Measure Sensitivity Analysis
Savings (kWh)
Original Savings (kWh)
% Difference in Savings
37-199 kW Generator with Circulating Block Heater 1,610 1,618 0.50%
200-799 kW Generator with Circulating Block Heater 3,273 3,286 0.39%
800-1099 kW Generator with Circulating Block Heater 8,277 8,309 0.39%
1100-2500 kW Generator with Circulating Block Heater 12,198 12,636 3.46%
Measure Sensitivity Analysis
Savings (kWh)
Original Savings (kWh)
% Difference in Savings
37-199 kW Generator with Circulating Block Heater 1,818 1,830 0.65%
200-799 kW Generator with Circulating Block Heater 3,600 3,619 0.52%
800-1099 kW Generator with Circulating Block Heater 9,097 9,144 0.51%
1100-2500 kW Generator with Circulating Block Heater 23,411 24,054 2.67%
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ResultsTable of results
*Averages for all SCE climate zones are shown above.
Measure Average kWh Savings*
Average kW Reduction*
Average Therm Savings*
37-199 kW Generator with Circulating Block Heater 1,641 0.2063 0
200-799 kW Generator with Circulating Block Heater 3,321 0.4163 0
800-1099 kW Generator with Circulating Block Heater 8,398 1.0475 0
1100-2500 kW Generator with Circulating Block Heater 13,859 1.7300 0
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Issues and Concerns – Cal TF CommentsAbstract Review Comments from the Cal TF
Perform a sensitivity analysis• A bin analysis using daily average temperatures was performed for two
climate zones (6 & 15)• The savings from the bin analysis and the original methodology are
within 4% (and 1% for 3 of the 4 measures)
Verify if savings will be impacted by thermostatic controls• As SCE is still awaiting monitored data from customized projects, the
impact of thermostatic controls is not yet known. They will be verified as soon as data is received from custom projects installed within SCE territory.
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Equipment Cost• Preliminary costs were taken from one customer• With more customers, we will have a better set of data to establish
equipment/labor costs
SCE Specific Data• Currently, BPA data is used. This data source has been questioned
whether it is appropriate for SCE territory.• Data for 10 sites is scheduled to be provided by early December. The
work paper will then be updated with this new data.
Issues and Concerns – Future Updates
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Questions or Comments?