AlfaTech Sustainability Presentation 2020
ELECTRICITY – Water - Energy Nexus
Energy CO2 Intensity & Water Consumption
Water Consumption Gallons/kWh
Water Consumption Gallons/kWh
Carbon Intensity • Carbon is released to atmosphere when electricity is generated. In U.S., this metric varies from 0.057 to 2.026 with the average value of 1 lb per kWh. • If the state has high carbon intensity electrical generation, “decarbonization” at building level can cause more harm to the environment. Water Consumption • Water is utilized for different processes during electrical generation. Water withdrawal and consumption factors vary greatly by the type of the fuel used. U.S. average is 2 gallons per kWh. • Water is required for energy generation and energy is required to extract, clean and deliver water. • If the state water consumption is high, “decarbonization” at building level can be problematic in draught zones.
lb CO2/kWh
lb CO2/kWh
Rank
State
Rank
State
1 2 3 4 5 6 7 8 9
Vermont
0.057 0.187 0.189 0.306 0.337 0.453 0.464 0.498 0.513 0.558 0.629 0.77 0.811 0.814 0.821 0.855 0.867 0.871 0.879 0.887 0.913 0.926 0.932 0.941
0.25
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
Tennessee
0.992 0.998 1.002 1.013 1.013 1.024 1.044 1.05 1.116 1.196 1.251 1.281 1.389 1.466 1.468 1.522 1.573 1.627 1.688 1.813 1.954 1.1
3.6
Washington
2.7
Iowa
0.11 1.65 0.41 0.21 0.14 8.39 0.43 0.48 0.26 0.58 0.46 0.94 0.04 1.13 3.05 5.13 0.41 5.32 0.58 4.15 1.2 0.3 0.3
Idaho
7.85 3.71 0.12 4.64 1.62 1.61 0.07 0.1
Georgia Minnesota Maryland
Oregon
New Hampshire 0.311
Maine
Florida
California New York
Oklahoma
Texas
District of Columbia 0.482
Michigan Arkansas Kansas Montana Nebraska Wisconsin
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Connecticut South Dakota New Jersey South Carolina
72.64 0.07 0.25 7,25 1.05 0.06
16.74
Nevada Illinois Virginia
Ohio
Colorado
Massachusetts Pennsylvania North Carolina Rhode Island
0
Hawaii
0.53 0.55 1.47 0.01 0.27 7.85 0.37 0 2.5
New Mexico
Utah
North Dakota 1.664
Louisiana Delaware Alabama
Missouri Indiana Kentucky
Alaska Arizona
West Virginia 1.976
Wyoming
2.026
US Average
1
2
Mississippi
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