Thinking further about eBuses vs CNG buses, there is a real energy savings on natural gas.
Let's look at how much gas a CNG bus burns per mile:
31.35 cf/mile = 126.67 cf/GGE ÷ 4.04 GGE/mile
Now a typical CCNG plant burns 8 cf or natural gas to make 1 KWh. So using this a as power source for the eBus leads to:
17.2 cf/mile = 2.15 kWh/mile × 8 cf/kWh
Thus, the eBus × CCNG combo uses 45% less natural gas than CNG buses. Moreover, wind and solar can potentially generate power for less.
Consider that the global price for LNG is about $5/mmbtu or $0.005/cf, and this leads to a fuel costs of $0.04/kWh at CCNG plants. Wind and solar are in many places beating this with an all-in price of $0.04/kWh. Either way, the eBus is moving along at $0.086/mile. Then CNG bus would need CNG at $2.74/mmbtu to match this energy cost per mile. Thus, we see that as China converts to eBus it is putting price pressure on LNG to nearly half the current price. In a way this leverages renewable prices to attack LNG prices to a greater extent than seen purely in the power market.
So how big is this impact of 115,700 eBuses in China. Suppose each travel 100 miles per day. That is 3135 cf/d/bus. In aggregate, that is 363 mmcf/d that can be replaced with renewable energy or efficiency.
Let's look at how much gas a CNG bus burns per mile:
31.35 cf/mile = 126.67 cf/GGE ÷ 4.04 GGE/mile
Now a typical CCNG plant burns 8 cf or natural gas to make 1 KWh. So using this a as power source for the eBus leads to:
17.2 cf/mile = 2.15 kWh/mile × 8 cf/kWh
Thus, the eBus × CCNG combo uses 45% less natural gas than CNG buses. Moreover, wind and solar can potentially generate power for less.
Consider that the global price for LNG is about $5/mmbtu or $0.005/cf, and this leads to a fuel costs of $0.04/kWh at CCNG plants. Wind and solar are in many places beating this with an all-in price of $0.04/kWh. Either way, the eBus is moving along at $0.086/mile. Then CNG bus would need CNG at $2.74/mmbtu to match this energy cost per mile. Thus, we see that as China converts to eBus it is putting price pressure on LNG to nearly half the current price. In a way this leverages renewable prices to attack LNG prices to a greater extent than seen purely in the power market.
So how big is this impact of 115,700 eBuses in China. Suppose each travel 100 miles per day. That is 3135 cf/d/bus. In aggregate, that is 363 mmcf/d that can be replaced with renewable energy or efficiency.