Economic and Environmental Performances of Small-Scale Rural PV Solar Projects under the Clean Development Mechanism: The Case of Cambodia
Abstract
:1. Introduction
2. Methodology
2.1. Mitigation Cost Analysis
2.1.1. Absolute Mitigation Cost
“The mitigation cost is the total cost of the project, including initial outlay of capital, the annual operational expenditure and revenues per CER expected for each project. As shown in Equation (1) below, project mitigation cost is defined as the net present value of a project’s annual operations costs less its non-CDM related revenues (e.g., income from electricity sales for wind projects), plus the capital expenditures, all divided by the amount of GHG emission reductions it expects to achieve over its crediting period.”(p. 93)
2.1.2. Relative Mitigation Cost
2.2. Multi-Objective Optimization
3. Case: Small-Scale Rural Solar PV Projects under the CDM
3.1. Mitigation Cost Analysis: Portable Solar LED Lanterns
3.1.1. Approved CDM Projects and Methodologies
3.1.2. Case Description
3.1.3. Greenhouse Gas Mitigation Costs
3.1.3.1. Absolute Greenhouse Gas Mitigation Cost
Mitigation costs and emissions | Absolute (7 y) | Absolute (10 y) | Relative (10 y) | Relative (7 y) |
---|---|---|---|---|
(A) Mitigation Cost Analysis | ||||
(1) Project inv cost ($): | 4,500,000.00 | 4,500,000.00 | 4,500,000.00 | 4,500,000.00 |
(2) Project O&M cost ($): | 3,706,261.92 | 4,760,142.02 | 4,760,142.02 | 3,706,261.92 |
(3) Baseline inv cost($): | not applicable | not applicable | 584,279.92 | 485,917.78 |
(4) Baseline O&M cost ($): | not applicable | not applicable | 46,411,356.74 | 34,344,357.03 |
(1) + (2) − (3) − (4) Additional project cost ($) | 8,206,261.92 | 9,260,142.02 | −37,735,494.64 | −26,624,012.89 |
(5) Project emission (t CO2eq) | 0.00 | 0.00 | 1,602.00 | 1,518.00 |
(6) Baseline emission (t CO2eq) | 193,158.00 | 275,940.00 | 283,605.00 | 198,523.50 |
(6) − (5) Emission reduction: (t CO2eq) | 193,158.00 | 275,940.00 | 282,003.00 | 197,005.50 |
[(1) + (2) − (3) − (4)]/[(6) − (5)] GHG MC LCC ($/t CO2eq) | 42.48 | 33.56 | −133.81 | −135.14 |
[(1) − (3)]/[(6) − (5)] GHG MC I0 ($/t CO2eq) | 23.30 | 16.31 | 13.89 | 20.38 |
(B) Monte Carlo Sensitivity Analysis on GHG MC LCC | ||||
Range($/t CO2eq) | [35.49; 50.87] | [27.98; 40.24] | [−186.04; −93.68] | [−190.07; −92.38] |
Sensitivity with respect to | Kerosene emission (−67.7%) | Kerosene emission (−67.7%) | Fuel use rate (−34.8%) | Fuel use rate (−34.8%) |
I0 solar lantern (+19.0%) | I0 solar lantern (+16.7%) | Cost of kerosene (−34.8%) | Cost of kerosene (−34.8%) | |
Battery cost (+12.8%) | Battery cost (+14.8%) | Kerosene emissions (+23.4%) | Kerosene emissions (+21.3%) |
3.1.3.2. Relative Greenhouse Gas Mitigation Cost
3.1.3.3. Results
3.2. Mitigation Cost Analysis: Small-Scale Rural Solar Home Systems
3.2.1. Approved CDM Projects and Methodologies
3.2.2. Case Description
3.2.3. Greenhouse Gas Mitigation Costs
3.2.3.1. Absolute Greenhouse Gas Mitigation Cost
Mitigation costs and emissions | Absolute | Relative | Absolute | Relative |
---|---|---|---|---|
Baseline: Kerosene | Baseline: Batteries Powered with Diesel Generator at Local Shop | |||
(A) Mitigation Cost Analysis | ||||
Project inv cost ($): | 1,857,480.00 | 1,857,480.00 | 1,857,480.00 | 1,857,480.00 |
Project O&M cost ($): | 478,151.48 | 478,151.48 | 478,151.48 | 478,151.48 |
Baseline inv cost ($): | n.a. | 584,279.92 | n.a. | 826,302.86 |
Baseline O&M cost ($): | n.a. | 46,411,356.74 | n.a. | 2,534,828.98 |
Additional proj cost ($) | 2,335,631.48 | −44,660,005.18 | 2,335,631.48 | −1,025,500.37 |
Project emissions (t CO2eq) | 0 | 990.77 | 0.00 | 990.77 |
Baseline emissions (t CO2eq) | 193,740.00 | 283,600.00 | 1,839.60 | 3,752.85 |
Emission Reductions: (t CO2eq) | 193,740.00 | 282,609.23 | 1,839.60 | 2,762.08 |
GHG mitigation cost LCC ($/t CO2eq) | 12.06 | −158.03 | 1,269.64 | −371.28 |
GHG mitigation cost I0 ($/t CO2eq) | 9.58 | 4.51 | 1009.72 | 373.33 |
(B) Monte Carlo Sensitivity Analysis | ||||
Range($/t CO2eq) | [13.64; 27.45] | [−171.8; −137.5] | [1,070.73; 1,519.54] | [−687.90; −2.28] |
Sensitivity with respect to | Light output SHS (−22.2%) Lifetime SHS (−21.9%) Light output kerosene lantern (+21.5) | Emissions kerosene (+98.3%) | Electr production SHS (−61.2%) Purchase price SHS (+37.4%) | Electricity from diesel generator (−21.1%) |
Electricity cost (−20.4%) | ||||
Lifetime SHS (−17.9%) |
3.2.3.2. Relative Greenhouse Gas Mitigation Cost
3.2.3.3. Results
3.3. Multi-Objective Optimization
3.3.1. Multi-Objective Linear Programming (MOLP) Models and Coefficients
i | Decision Variable | Technology | MOLP A: Relative MC Analysis, LCC | MOLP B: Relative MC Analysis, IC | MOLP C: Absolute MC Analysis, LCC | MOLP D: Absolute MC Analysis, IC | ||||
---|---|---|---|---|---|---|---|---|---|---|
1 | x1 | Kerosene | 46,996 | 283,605 | 584 | 283,605 | 0 | 193,740 | 0 | 193,740 |
2 | x2 | Solar LED | 9260 | 1602 | 4500 | 1602 | 9260 | 0 | 4500 | 0 |
3 | x3 | Batteries | 3361 | 3753 | 826 | 3753 | 0 | 1840 | 0 | 1840 |
4 | x4 | SHS | 2335 | 991 | 1,857 | 991 | 2,335 | 0 | 1857 | 0 |
3.3.2. MOLP Optimal Solution Frontiers
3.3.3. The Added Value of Complementing the Mitigation Cost Analysis with Multi-Objective Optimization
4. Conclusions and Discussion
Acknowledgments
Author Contributions
Conflicts of Interest
Appendix A
Data | Kerosene Lantern (Base Technology) | Solar LED Lantern | Battery Powered with Diesel Generator (Base Technology) | Solar Home System |
---|---|---|---|---|
Economic data | ||||
Initial investment (I0) | Lantern: $0.70 Wicks: $0.125 | Lantern: $10 Battery: $5 | Battery: $45 Fluorescent tube: $5 | SHS including installation: $345 |
Operational lifetime (n) | Lantern: 2 y Wicks: 0.5 y | Lantern: 10 y Battery: 2 y | Battery: 1 y | Solar system: 10 y Battery: 3 y |
Operating costs (OC) | Kerosene: 0.74 $/L [22]; 0.03 L/h [26] | Battery replacement: $5 | Electricity: $0.95/kWh [22] | Battery: $30 Assembly & maintenance: $25 |
Crediting period (cp) | - | 7 y [26] | - | 10 y [25] |
Discount rate (r) | 4% [35] | idem | idem | idem |
Technical data | ||||
Light output | 45 Lm [23] | 30 Lm | 900 Lm | 1050 Lm |
Light source | Fuel (0.03 L/h) | 6 LEDs | 1 × 18W CFL (50lm/W) | 3 × 7W CFL (50 Lm/W) |
Solar panel | - | 0.7 Wp, a-Si | - | 40 Wp, mc-Si |
Battery capacity | - | 2 Ah | 70 Ah | 48Ah |
Battery type | - | 2 × NiCd AA (1.5 V) | Lead acid (12 V) | Lead acid (12 V) |
Electricity generation | - | - | 279.6 Wh/day | 117 Wh/day |
Density | 0.8026 kg/L [36] | - | - | - |
Size of the systems considered to provide the functional unit (FU) of 114,975 million lumen-hours over a 10 year time span | ||||
lm-hours per system | 114,975 Lm-h | 383,250 Lm-h | 5,102,700 lm-h | 21,352,500 Lm-h |
Systems needed to provide the FU | 1,000,000 | 300,000 | 22,532 | 5,384 |
Emissions due to… | Unit process (Available in EcoInvent) | Quantity | Comment | |
---|---|---|---|---|
Battery (Lead acid battery 100 Ah) Powered with Diesel Generator | ||||
Energy input | Electricity, at cogen 200 kWe diesel SCR, allocation exergy/CH U | 146 kWh | Proxy for energy delivered by diesel aggregate | |
Battery | Lead, primary, at plant/GLO U | 17 kg | Lead plates and bridges | |
Polyethylene, HDPE, granulate, at plant/RER U | 3 kg | Casing and plate seperators | ||
Sulphuric acid, liquid, at plant/RER U | 2.5 kg | |||
Water, completely softened, at plant/RER U | 4.7 kg | |||
Copper wire | Wire | 0.5 m | 5/10y | |
Copper, at regional storage/RER U | 19.5 g | 39 kg/km from FireLCA report | ||
Transport | Polyvinylchloride, at regional storage/RER U | 44g | ||
Transport, van <3.5 t/RER U | 0.03264 ton·km | |||
Transport, transoceanic freight ship/OCE U | 0.33069 ton·km | |||
Transport, lorry >16 t, fleet average/RER U | 0 ton·km | |||
Solar Led Lantern (Moonlight) | ||||
Batteries | Steel, low-alloyed, at plant/RER U | 24 g | 6 × NiCd battery 1000 mAh | |
Nickel, 99.5%, at plant/GLO U | 42 g | 6 × NiCd battery 1000 mAh | ||
Cadmium, primary, at plant/GLO U | 42 g | 6 × NiCd battery 1000 mAh | ||
Polyethylene, HDPE, granulate, at plant/RER U | 21 g | 6 × NiCd battery 1000 mAh | ||
Water, completely softened, at plant/RER U | 18 g | 6 × NiCd battery 1000 mAh | ||
Potassium hydroxide, at regional storage/RER U | 12 g | 6 × NiCd battery 1000 mAh | ||
Electronic parts | Photovoltaic panel, a-Si, at plant/US/I U | 0.01257 m2 | Solar panel 0.7 Wp | |
Flat glass, uncoated, at plant/RER U | 0.064 kg | Solar panel 0.7 Wp | ||
Converter, chromium steel 18/8, at plant/RER U | 0.015 kg | Solar panel 0.7 Wp | ||
Printed wiring board, mixed mounted, unspec., solder mix, at plant/GLO U | 6 g | Circuit board | ||
Light emitting diode, LED, at plant/GLO U | 1 g | LEDs | ||
Miscellaneous parts | Nylon 66, at plant/RER U | 4 g | Moonlight cord | |
Solid bleached board, SBB, at plant/RER U | 3.4 g | Moonlight reflector | ||
Aluminium, primary, at plant/RER U | 0.1 g | Moonlight reflector | ||
Transport | Steel, converter, chromium steel 18/8, at plant/RER U | 6 g | Moonlight screws | |
Steel product manufacturing, average metal working/RER U | 6 g | Moonlight screws | ||
Polystyrene, general purpose, GPPS, at plant/RER U | 0.088 kg | Moonlight Shell | ||
Injection moulding/RER U | 0.088 kg | Moonlight Shell | ||
Transport, van <3.5 t/RER U | 0.0421875 ton·km | |||
Transport, transoceanic freight ship/OCE U | 0.344975 ton·km | |||
Transport, lorry >16t, fleet average/RER U | 0.0214375 ton·km | |||
Solar Home System (Battery 3 × 40 Ah) | ||||
Lead Acid Battery | Lead, primary, at plant/GLO U | 20.4 kg | Lead plates and bridges | |
Polyethylene, HDPE, granulate, at plant/RER U | 3.6 kg | Casing and plate seperators | ||
Sulphuric acid, liquid, at plant/RER U | 3 kg | |||
Water, completely softened, at plant/RER U | 5.64 kg | |||
Electronic parts | Photovoltaic panel, multi-Si, at plant/RER/I U | 0.46352 m2 | Multi-Si 40 Wp | |
Inverter, 500W, at plant/RER/I U | 1p | Proxy for charge controller | ||
Copper, at regional storage/RER U | 117 g | Proxy for simple parts and wires | ||
Transport | Polyvinylchloride, at regional storage/RER U | 264 g | Proxy for simple parts and wires | |
Transport, van <3.5 t/RER U | 0.2502 ton·km | |||
Transport, transoceanic freight ship/OCE U | 1.65345 ton·km | |||
Transport, lorry >16 t, fleet average/RER U | 0.06342 ton·km | |||
Kerosene Lantern | ||||
Fuel use | Adapted process: Light fuel oil, burned in boiler 10 kW condensing, non-modulating/CH U | 33l | Annual fuel use: 0.03 L/h, 3 h/day, 365 days/y. Only emissions per kg fuel were taken from this process, and fuel supply chain was remodelled to fit region of interest |
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De Schepper, E.; Lizin, S.; Durlinger, B.; Azadi, H.; Van Passel, S. Economic and Environmental Performances of Small-Scale Rural PV Solar Projects under the Clean Development Mechanism: The Case of Cambodia. Energies 2015, 8, 9892-9914. https://doi.org/10.3390/en8099892
De Schepper E, Lizin S, Durlinger B, Azadi H, Van Passel S. Economic and Environmental Performances of Small-Scale Rural PV Solar Projects under the Clean Development Mechanism: The Case of Cambodia. Energies. 2015; 8(9):9892-9914. https://doi.org/10.3390/en8099892
Chicago/Turabian StyleDe Schepper, Ellen, Sebastien Lizin, Bart Durlinger, Hossein Azadi, and Steven Van Passel. 2015. "Economic and Environmental Performances of Small-Scale Rural PV Solar Projects under the Clean Development Mechanism: The Case of Cambodia" Energies 8, no. 9: 9892-9914. https://doi.org/10.3390/en8099892