Let s be kinder to natural gas

Transcription

1 Let s be kinder to natural gas Environment Exchange session: Beyond Gas: Moving away from the "transition" fuel? Organizer: The Conservation Council ACT Region Date: 25 July 2017 Kaveh R. Khalilpour The Energy Change Institute Australian National University

2 The views and opinions expressed in this presentation are those of the presenter and do not necessarily reflect the official position of the ANU Energy Change Institute.

3 Outline Ø Ø Ø Overview of the World energy consumption and the share of renewables Value of natural gas: A micro view Value of natural gas: A macro view

4 The World is doing great with renewables Renewable energy consumption Other renewables consumption by region Million tonnes oil equivalent Excluding hydro Share of power by region Other renewables share of power generation by region Percentage BP Statistical Review of World Energy 2017 BP p.l.c. 2017

5 The World is doing great with renewables Some highlights: Renewable energy in power generation (not including hydro) grew by 14.1% in 2016 close to the 10-year average, but the largest increment on record. Renewable energy accounted for 7.5% of power generation, up from 6.7% in Wind provided more than half of the growth, with solar energy being almost a third. Excluding hydro China overtook the US to become the world s largest renewable power producer. 5

6 Primary energy world consumption Million tonnes oil equivalent BP Statistical Review of World Energy 2017 BP p.l.c. 2017

7 The Future of Natural Gas June 2011 July 2011

8 Outline Ø Ø Ø Overview of the World energy consumption and the share of renewables Value of natural gas: A micro view Value of natural gas: A macro view

9 Intermittency, the key challenge of renewable energies Daily load PV output Energy demand Time of the day 9

10 Intermittency, the key challenge of renewable energies Daily load PV size increase Energy demand Time of the day 10

11 A DS4S Tool (Decision Support for Screening, Selection, Sizing, and Scheduling) A polygeneration system Considers multiple generation and multiple storage systems. Concurrent selection, sizing, and operation Applicable for both gridconnected and griddisconnected (or off-grid) conditions. DC and/or AC modes 12

12 Seasonality of solar irradiation at three latitudes Alice Springs Sydney Hobart Diffuse radiation Global radiation 16

13 Two houses: one winter-peak, and the other summer-peak 17

14 Feasibility of PV-battery systems Consumption style Winter-peak (House A) Summer-peak (House B) Low GHI Med. GHI High GHI Renewable energy resource 21

15 For winter-peaking consumers, hybridization seems necessary 22

16 Outline Ø Ø Ø Overview of the World energy consumption and the share of renewables Value of natural gas: A micro view Value of natural gas: A macro view

17 Surplus renewable energy storage in air and natural gas Low-value electricity (from solar PV, wind, etc.) Net electrical power Export to grid Net electrical power Export to grid Air inlet Air inlet Clutch HP Comp G Comp LP Comp Clutch M G Turbine Turb Natural gas purchased E-89 Combustion chamber Combustion chamber Turb G Natural gas purchased NG sold G Turb Air storage Hour (Jan to Dec) 8000 Quantity (MW or MWh) Quantity (MW or MWh) Electricity exported Comp M NG storage Electricity transactions Hour (Jan to Dec) 24

18 Surplus renewable energy for hydrogen or methane synthesis Sankey diagram of the renewable power methane concept [1] 25

19 Gas and Electricity: From one-directional interaction to bidirectional Natural gas supply chain Natural gas supply chain Interaction Interaction Electricity supply chain Electricity supply chain 26

20 Conclusion Renewables are the future of energy market. Globally, we have a long way to 100% renewables at a desired economics. We have to rely on natural gas, but utilize all of its energy carrier potentials. Natural gas supply chain can in fact support faster development of renewable energies. 27