tailieunhanh - Electric Vehicles The Benefits and Barriers Part 5

Tham khảo tài liệu 'electric vehicles the benefits and barriers part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | What is the Role of Electric Vehicles in a Low Carbon Transport in China 69 Well-to-tank results WTT fossil fuel consumption of each pathway was shown expect the 2 on-board hydrogen generation pathways Figure 1 . No pathway consumed less WTT fossil fuel than the conventional gasoline pathway when 1 MJ vehicle fuel was generated. The reason was that present overall energy efficiencies of hydrogen production or electricity generation from either coal or natural gas were between 40 60 which was much lower than the energy efficiency of petroleum refining process over 90 . Large central plant of hydrogen production using natural gas as feedstock had the advantage of energy consumption by 350 540 over other methods indicating that this kind of central plant was likely a better choice to make hydrogen than refill station production or on-board generation ways. Fossil fuel required to produce grid electricity was about times more than that required by the conventional gasoline due to numerous coal utilization in power plant. Fig. 1. Comparison of WTT fossil fuel consumptions WTT greenhouse gas emissions resulting from fossil fuel consumption of each pathway was presented expect 2 on-board hydrogen generation pathways Figure 2 . Greenhouse gas emitted during hydrogen and electricity generation was 5 35 times higher than gasoline production. Fig. 2. Comparison of WTT greenhouse gas emissions 70 Electric Vehicles - The Benefits and Barriers Well-to-wheel results WTW fossil fuel consumption Figure 3 and petroleum consumption Figure 4 of total 12 pathways were described as how much MJ energy was required for the car to travel 1 km. WTW energy consumptions of fuel cell vehicle pathways were very different due to feedstock and process variety. The pathway of fuel cell vehicle using gaseous hydrogen generated either from natural gas in large central plant or by on-board generator had a comparable WTW fossil fuel consumption to the gasoline pathway because the fuel .

TỪ KHÓA LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.