webinar: inter-model comparison of california energy models · 27.02.2014 · –understand...
TRANSCRIPT
H2
Geoff MorrisonAnthony EggertSonia YehRaphael IsaacChristina Zapata
Webinar: Inter-Model Comparison of
California Energy Models
27 February, 2014
UC Davis
California’s Goals:
Reach 1990 levels by 2020 and 80% reduction by 2050
?
0
100
200
300
400
500
600
700
800
900
1000
2000 2010 2020 2030 2040 2050
MM
T C
O2
e/y
r
431 MMT CO2e/yr
86 MMT COe/yr
MMT CO2e = Million metric tonnes of carbon dioxide equivalent
1990 Levels80% below 1990 Levels
2/21
Model Questions
• How will California’s energy system evolve to 2030 & 2050:
– Greenhouse Gas (GHG) trajectories?
– Fuel mix and technology mix?
– Infrastructure build rate?
– Air quality?
• What assumptions drive these results?
• What are common insights across models? Where do they diverge?
3/21
• Update to AB 32 Scoping Plan (2014):
“A mid-term statewide emission limit will ensure that the State stays on course to meet our long-term goal and continues the success it has achieved thus far in reducing emissions.” (CARB, 2014, p. 39)
• Governor’s Environmental Goals and Policy Report (2013):
“…the state needs a mid-term emission reduction target to provide a goalpost to guide near-term investment and policy development. A mid-term target will allow us to gauge current actions relative to our climate goals and serve to provide a clear sign of the state’s commitment to achieving long-term climate stabilization. This commitment will send a strong signal of support for the innovators and entrepreneurs to drive technology and development to tackle the challenge of climate change.” (OPR, 2014, p. 6)
Need for Mid-term GHG Target
4/21
Why Do Inter-Model Comparisons?
• Sweeney, 1983
– Model comparisons benefit the modeling community “through identification of errors, clarification of disagreements, and guidance for model selection”
• Weyant, 2012
– Understand Strength/weaknesses of existing methodologies
– Identify high priority areas for development of new data, analyses, and modeling methodologies
• Two levels of model comparisons:
– Level 1: compare & contrast inputs & outputs (e.g. review article)
– Level 2: standardize inputs, compare outputs (SRES, SSPs)
5/21
Model Group (lead)
ARB VISION California Air Resources Board (CARB)
BEAR UC Berkeley (Roland-Holst)
CA-TIMES UC Davis (Yang, Yeh)
CCST View to 2050 CCST (Long)
CCST (Bioenergy) CCST (Youngs)
E-DRAM UCB/CARB (Berck)
Energy 2020 ICF/CRA
GHGIS LBNL (Greenblatt)
IEPR 2013/CED 2013 California Energy Commission (CEC)
LEAP-SWITCH UC Berkeley/LBNL (Nelson, Wei)
MRN-NEEM EPRI/CARB
PATHWAYS E3/LBNL (Williams)
Wind Water Solar (WWS) Stanford/UCD (Jacobson, Delucchi)
CA Energy Models/Reports Reviewed
6/21
Qualitative Comparison
Yes/Represented
Limited
None/Not represented
7/21
Population Assumptions
BEAR – DOF (2013)
CA 2050 - U.S. Census (2005)
CA-TIMES - DOF (2013)
E-DRAM - DOF (2003)
Energy 2020 - IEPR (2009)
GHGIS - DOF (2013)
IEPR 2013 - IHS Global Insight for
Mid projection
LEAP-SWITCH - AEO (2011)
VISION - AEO (2011)
WWS - U.S. Census (2009)
8/21
25
30
35
40
45
50
55
60
1990 2000 2010 2020 2030 2040 2050
Po
pu
lati
on
(M
il)
Wei et al., 2013
WWSIEPR 2013, mid
ICF/SSI, 2010
Berck et al., 2008
Roland-Holst, 2012Greenblatt, 2013
Nelson/Wei et al., 2013Yang et al., 2014
Williams et al., 2012 50.4
59.5
56.6
Business As Usual (BAU) Scenarios
9/21
0
100
200
300
400
500
600
700
800
900
1000
2000 2010 2020 2030 2040 2050
MM
T C
O2
e/
yr
Yang et al., 2014
Williams et al., 2012
ARB Scoping Plan, 2008
Roland-Holst, 2012ARB Scoping Plan, 2014
Long et al., 2011
Nelson/Wei et al., 2013
80 in '50AB32 Target
Historic
Reaching 80 in ‘50 Goals
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100
200
300
400
500
600
700
800
900
1,000
2010 2020 2030 2040 2050
MM
T C
O2
e/
yr
Linear Reduction to 80%
Constant Rate to 80%
Pathways (Hi Nuke)
Pathways (Hi renew)
CA TIMES (Line)
CA TIMES (CCS-C)
GHGIS (Case 2)
GHGIS (Case 3)
LEAP-SWITCH (Base)
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100
200
300
400
500
600
700
800
900
1,000
2010 2020 2030 2040 2050
MM
T C
O2
e/
yr
Linear Reduction to 80%
Constant Rate to 80%
10/21
Reaching 80 in ‘50 Goals
11/21
-
100
200
300
400
500
600
700
800
900
1,000
2010 2020 2030 2040 2050
MM
T C
O2
e/
yr
Linear Reduction to 80% Constant Rate to 80%
Williams et al., 2012 (Nuke) Williams et al., 2012 (Hi Renew)
Yang et al., 2014 (Line) Yang et al., 2014 (CCS)
GHGIS (Case 2) Greenblatt, 2013 (Case 3)
Nelson/Wei et al., 2013 (Base) Nelson/Wei et al., 2013 (-40% BioCCS)
Annual vs. Cumulative Emissions?
12/21
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
2010 2020 2030 2040 2050
MM
T C
O2
Linear Reduction to 80% Constant Rate to 80%Williams et al., 2012 (Nuke) Williams et al., 2012 (Hi Renew)Yang et al., 2014 (Line) Yang et al., 2014 (CCS)GHGIS (Case 2) Greenblatt, 2013 (Case 3)Nelson/Wei et al., 2013 (Base) Nelson/Wei et al., 2013 (-40% BioCCS)
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50
100
150
200
250
300
350
400
450
500
2010 2020 2030 2040 2050
MM
T C
O2
/y
r
Annual Cumulative
Annual vs. Cumulative Emissions?
0
100
200
300
400
500
2010 2020 2030 2040 2050
MM
T C
O2
e/
yr
291
284
175
396
208
84
187
431
456
316
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
2010 2020 2030 2040 2050M
MT
CO
2e
12,528
5,1498,473
10,3579,205
4,070
6,492
14,394
8,578
Annual Emissions Cumulative Emissions
8-52% Reduction
Large difference in Climate Impacts!
13/21
Light-Duty Vehicle Energy Use, 2030 & 2050
• In deep reduction scenarios, electricity and hydrogen provide 3-13% of Light Duty Vehicle (LDV) fuel in 2030 and 57-87% by 2050
• Total transportation energy drops by as much as 70% from 2010-2050 due to increased efficiency.
• Vehicle Miles Traveled (VMT) assumptions range from 275 billion miles to 695 billion miles
• Models differ dramatically in total energy use for LDVs and total transportation in 2050
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500
1000
1500
2000
2500
3000
3500
4000
LDV
En
ergy
(P
J)
Hydrogen
Electric
Liquid Fuels
All Transport
2010 2030 2050 2030 2050 2030 2050 2030 2050 2030 2050 2030 2050 2050 2050
VISION VISION CA-TIMES CA-TIMES LEAP-SWITCH CCST PATHWAYS WWS
(Case 3) (Case 2) (Hi Bio) (GHG-M) (Agg. Elect) (PEV+H2) (Mitigation)
LEGEND
Bars = LDV energy use by source
Red triangles = total transport energy use
14/21
Electricity Generation and Renewable Fraction in 2030 & 2050
LEGEND
Box plot = quartiles (box) and max/mins(whiskers) across mitigation scenarios in given year
Red squares = individual scenarios
Percentages above boxes are percent renewable (non-hydro) across mitigation scenarios
• Renewable fraction (non-hydro) ranges from 30-51% in 2030 and 36-96% in 2050 (non-WWS)
• Total generation goes from 306 TWh in 2013 to 290-990 in 2030 and 245-1380 in 2050
• Implied renewable build rate is 0.2-4.2 Gigawatts per year (GW/yr) between today and 2030 and 1.5-10.4 GW/yr between 2030-2050 15/21
250
350
450
550
650
750
2030 2050 2030 2050 2030 2050 GHGIS WWS CCST
Ele
ctri
city
Ge
ne
rati
on
(T
Wh
/y
r)
2013 2030 2050 2030 2050 2030 2050 2030 2050 2030 2050 2050 LEAP-SWITCH CA-TIMES PATHWAYS GHGIS WWS CCST
(Case 3)
20%
30-45%
38-74%
42-94%
38-55%
33-39%
38-81%
80% 100%
990 1380
51%
81%
36%
Liquid Biofuels are Important but Assumptions Matter!
• “Advanced” bio-liquids could power up to ~40% of transportation sector in 2050• Bioenergy goes to transportation, not to electricity• Large carbon savings from bioenergy+CCS (more modeling needed!)
16/21
Delivered Bioenergy in 2050
0 3 6 9 12 15
ARB, 2013; VISION
Yang et al., 2013, CA-TIMES
Long et al., 2011; CCST (Low)
Long et al., 2011; CCST (Hi)
Youngs, 2013; CCST-Bio (Base)
Youngs, 2013; CCST-Bio (Hi)
Greenblatt, 2013; GHGIS (Case 2)
Greenblatt, 2013; GHGIS (Case 3)
Neslon/Wei et al., 2013; LEAP-SWITCH
Williams et al., 2012; PATHWAYS
Billion Gallons Gasoline Equivalent (BGGE)
Unspecified
In-state (unspecified)
Out-of-state (unspecified)
Generic "energy crops"
In-state residues
Conventional
Herbaceous Energy Crops
Forest Residue
Landfill
Tallow/Grease
Ag Residue
Criteria Emissions
• Coordination needed between 2032 criteria emission goals and 2030/2050 climate goals
• Including detailed criteria and GHG emissions in a single model can be very difficult
• WWS estimates that a 100% renewable energy system would eliminate approximately 16,000 state air pollution deaths per year and avoid $131 billion per year in health care costs.
17/21
Observations
• Models built to examine pathways to 2050 not specifically focused on maximizing climate benefits by 2030 (except GHGIS)
• Many models lack economic indicators to consider economic feedback and benefits/costs of policy options
• Poor representation of uncertainty (version 2 of E3 model improves on this)
• Criteria emissions not part of the optimization process
• Modelers need to work with policy makers more closely to represent the details of the policy design
• Data availability and data/model transparency is absolutely essential.
18/21
Key Takeaways
• Annual emissions in deep reduction scenarios (i.e. 80 in 50):
– 208-396 MMT CO2e/yr in 2030
– 8-52% reduction by 2030 from 1990 levels
– Cumulative emissions vary by as much as 40% in 2050
– 30-50% renewable grid by 2030
– 38-94% renewable grid by 2050
• Electrification of end uses and expansion of grid are key
– Need to expand grid by 1.5-2.5 times its current capacity
• Need greater understanding about how to utilize biomass for energy and fuel
– More modeling of bioenergy+CCS
– More modeling of life cycle emissions and other sustainability factors
• Better long-term modeling of policies and technologies addressing non-energy related GHG emissions
– BAU scenarios have non-energy GHG emissions >2050 target
• Coordination is key!
19/21
Thank you!
Please see our CCPM summary document and forthcoming white paper here: http://policyinstitute.ucdavis.edu/initiatives/ccpm/
20/21
Extra Slides
21/21
• US (Copenhagen Accord) – 33% below 1990 levels by 2030
• Euro Union – 40% below 1990 levels by 2030 (under negotiation)
• Denmark – 40% below 1990 levels by 2030
• Netherlands, UK – 50% between 2022-2027
• Germany – 55% below 1990 by 2030
• Scotland – 42% below 1990/5 levels by 2020 and 80% by 2050
– Expects to make 60% reduction target in 2030
Emission targets in developed world
Coordination is Key in Meeting 2030 and 2050 Goals
• Between state agencies and with other state goals:
– Air quality targets for San Joaquin and South Coast regions
– Water use/quality
– Health goals
• Between Western states:
– WECC targets need to be aligned to avoid leakage, expand market for low-carbon technology, provide least cost mitigation measures
• Between modelers and policy makers
20/21
Income Assumptions
CA 1980-2010 - Personal
income (BEA, 2013)
CA 1997-2010 - GDP
(BEA, 2013)
CA 2010-2015 – Personal
income (DOF, 2013)
E-DRAM - Personal income
(DOF, 2003)
CA 2050 - GDP
(BEA, 2009) + Regressions
Energy 2020 - Personal income
(IEPR, 2009)
BEAR – Per capita GDP
(AEO, 2011)
GHGIS - Personal income
(from VISION/IEPR, 2013)
VISION - Personal income
(AEO, 2011)
IEPR 2013 - Personal income
(IHS 2013; Moody's, 2011)
*Some models adjusted from nominal to real growth rates.
** Some models use personal income while other use GDP
H2
Biomass in CA-TIMES
Feb 2014
Biomass Supply
• Biomass supply is represented as a series of location-independent supply curves for a number of different biomass resources. This data is from Parker (2010)
0
5
10
15
20
25
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Bio
ma
ss
Co
st
($/G
J)
Cumulative Biomass Supply (PJ)
Forest Residue MSW Pulp Ag residue Energy Crops Orchard waste Yellow Grease Tallow Corn All BIOMASS
Biomass Supply
• Biomass supply is split between in-state resources and a portion of biomass in the Western region
– 30% of Western region biomass, CA is ~30% of western US pop
• Also assume annual supply increase of 1% per year
– 2050 supply is 28% greater than 2025 supply
Biomass Supply
• Majority of biomass comes from out-of-state western region
0
200
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600
800
1,000
1,200
1,400
1,600
1,800
2,000
2010 2012 2015 2017 2020 2025 2030 2035 2040 2045 2050 2055
Bio
mas
s S
up
ply
(P
J)
BIOENCRUS
BIOAGRRUS
BIOPULPRUS
BIOOVWRUS
BIOMSWYRUS
BIOMSWWRUS
BIOMSWPRUS
BIOMSWMRUS
BIOFORRUS
BIOCRNCA
BIOTALCA
BIOYGRCA
BIOENCCA
BIOAGRCA
BIOPULPCA
BIOOVWCA
BIOMSWYCA
BIOMSWWCA
BIOMSWPCA
OutofstateBiomass
InstateBiomass
Biomass Supply representation
• Biomass is split into several categories
1. Woody (Forest, woody MSW, Orchard/Vineyard, Pulp)
2. Herbaceous (Agr. Residues, Energy crops)
3. MSW (Paper, Yard and Mixed)
4. Yellow grease
5. Tallow
• Conversion technologies
– Biochemical cellulosic ethanol production (1,2,3)
– Thermochemical cellulosic ethanol production (1,2,3)
– Renewable diesel production (4,5)
– Pyrolysis bio-oil production (1,2,3)
– FT conversion – drop in fuels (1,2,3) with or without CCS
Some general results
• In our scenarios, oil price is based on AEO Reference case, and rises to $250/bbl in 2050
– At these prices biomass is fully utilized to make biofuels for transport, even in absence of carbon constraint.
• In GHG scenarios, bio-CCS is used in all cases where the technology is available
– bioCCS from FT conversion of biomass to liquid biofuels can displace emissions from 2 gallons of petroleum fuel per gallon of biofuel produced
• All biomass is used in the production of liquid transportation fuels by 2050
– After 2030, no biomass is used for electricity production. Relative value of biomass for emissions reduction is higher for transportation (can displace petroleum in transport, displace NGCC in electricity). Even greater value if CCS is available.
GHG-STEP scenario
• Most biofuels are drop in fuels (jet, diesel and gasoline) with some cellulosic ethanol as well
Transportation Fuel
• CA-TIMES Transportation fuels in 2050 –GHG-STEP
– Lots of aviation and marine fuels (i.e. liquid fuels)
– Even with GHG constraints, lots of petroleum fuels
On-Roadgasoline+Subs tutes
16%
On-Roaddiesel+subsi tutes
21%
NG5%Avia onfuel
28%
MarineFuels16%
Electricity8%
H26%
Biofuels34%
PetroleumFuels46%
Other20%
Future work
• Updates to 2010 Biomass supply curves
• Revisit costs, performance of biofuel conversion facilities
Factors that Influence Model Outputs
Source: D. Manley, 2013
8/21