Well-to-wheel GHG emissions and mitigation potential from light-duty vehicles in Macau
The rapid growth of vehicle sales and usage has highlighted the need for greenhouse gas (GHG) emission reduction in Macau, a special administrative region (SAR) of China. As the most primary vehicle type, light-duty vehicles (LDV, including light-duty gasoline vehicles (LDGVs) and light-duty diesel vehicles (LDDVs)) play a key role in promoting the GHG reduction and development of green transportation system in Macau.
This study, on the basis of real-world tested and statistical data, firstly performed a streamlined life-cycle assessment (SLCA) on LDVs, to evaluate the potential GHG emissions and reduction through shifting to hybrid electric vehicles (HEVs) and electric vehicles (EVs).
Results and discussion
The results show that the mean GHG emissions from the LDGVs, LDDVs, and HEVs per 100 km were 25.16, 20.30, and 15.00 kg CO2 eq, respectively. Under the current electricity mix in Macau, EVs with the emissions of 12.39 kg CO2 eq/100 km can achieve a significant GHG emission reduction of LDVs in Macau. The total GHG emissions from LDVs increased from 124.99 to 247.82 thousand metric tons over the periods 2001–2014, with a 5.42% annual growth rate. A scenario analysis indicated that the development of HEVs and EVs—especially EVs—has the potential to control the GHG emissions from LDVs. Under the electricity mix of natural gas (NG) and solar energy (SE), the GHG emissions from EVs would drop by about 22 and 28%, respectively, by 2030.
This study develops a useful approach to evaluate the potential GHG emissions and its reduction strategies in Macau. All the obtained results could be useful for decision makers, providing robust support for drawing up an appropriate plan for improving green transportation systems in Macau.
KeywordsElectric vehicles GHG emissions LCA Light-duty diesel vehicles Light-duty gasoline vehicle Macau
This work was supported by the Foundation for Development of Science and Technology of Macau (FDCT) (no. 083/2015/A3), the Shenzhen Science and Technology Plan (JCYJ20150525092941042) and the Young Faculty Promotion Plan of Guangdong Province (YQ2015139).
- AQSIQ China (Administration of Quality Supervision, Inspection and Quarantine of the P. R. China), 2003. Measurement methods of fuel consumption for light-duty vehicles, GB/T 19233–2003, Beijing, ChinaGoogle Scholar
- CEM (Macau Power Plants), 2016. CEM Annual Report 2005–2014. Macau Power Plants. <http://www.cem-macau.com/Annual-Report>
- DSEC (Statistics and Census Service of Macau), 2016a. Yearbook of statistics 1990–2014. Statistics and Census Service of Macau. <http://www.dsec.gov.mo/Statistic.aspx?NodeGuid=d45bf8ce-2b35-45d9-ab3a-ed645e8af4bb>
- DSEC (Statistics and Census Service of Macau), 2016b. Transport and communications statistics 2000–2015. Statistics and Census Service of Macau. <http://www.dsec.gov.mo/Statistic.aspx?NodeGuid=62579ac9-8061-4ede-b4c2-8e7949764582>
- DSEC (Statistics and Census Service of Macau), 2016c. Macao external merchandise trade statistics database. Statistics and Census Service of Macau. <http://www.dsec.gov.mo/NCEM.aspx>
- International Energy Agency (IEA). Key world energy statistics. Paris, France. International Energy Agency, 2015. <http://www.iea.org/publications/freepublications/publication/KeyWorld_Statistics_2015.pdf>
- ISO (International Standard Organization), 2016. 14040 Series: Environmental management—life cycle assessment—principles and framework. ISO 14040 Series. International Standard Organization. <http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail. htm?csnumber=37456>
- MoEF (The Ministry of Environment and Forest of India). National ambient air quality standards, 2009. <http://cpcb.nic.in/National_Ambient_Air_Quality_Standards.php>
- ODES (Office for Development of the Energy Sector). Research report abstracts on Macau energy efficiency 2005–2013. Office for Development of the Energy Sector, 2016. <http://www.gdse.gov.mo/gdse_big/guideline1.asp>
- Orsi F, Muratori M, Rocco M, Colombo E, Rizzoni G (2016) A multi-dimensional well-to-wheels analysis of passenger vehicles in different regions: primary energy consumption, CO2 emissions, and economic cost. Appl Energ 169:197–209. https://doi.org/10.1016/j.apenergy.2016.02.039 CrossRefGoogle Scholar
- Protocol GG (2012) “Chinese Life Cycle Database (CLCD)”Google Scholar
- Song Q, Wang Z, Li J, Duan H, Yu D, Liu G (2017c) Comparative life cycle GHG emissions from local electricity generation using heavy oil, natural gas, and MSW incineration in Macau. Renew Sust Energ Rev. https://doi.org/10.1016/j.rser.2017.06.051
- Takeda K, Sugioka S, Shimada Y, Hamaguchi T, Kitajima T, Fuchio T (2008) LCA of the various vehicles in environment and safety aspect. Lect Notes Artif Int 5179:9–16Google Scholar
- Weidema BP, Bauer C, Hischier et al (2013) Overview and methodology. Data quality guideline for the ecoinvent database version 3. Swiss Centre for Life Cycle InventoriesGoogle Scholar