Static Sankey Diagram of Nonprocess Energy in U.S. Manufacturing Sector

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The Nonprocess Energy Static Sankey diagram shows how energy is used for supporting functions by U.S. manufacturing plants. Click on the Full SectorOnsite Generation, and Process Energy thumbnails below the diagram to see further detail on energy flows in manufacturing. Also, see the Dynamic Manufacturing Energy Sankey Tool to pan, zoom, and customize the manufacturing Sankey data and compare energy consumption across manufacturing subsectors.

The Nonprocess Energy diagram below shows inputs of steam, electricity, and fuel to “nonprocess” end uses in the U.S. manufacturing sector (NAICS 31-33).  Nonprocess applications that use this energy include facility HVAC, facility lighting, onsite transportation, other facility support (e.g., cooking, water heating), and other nonprocess uses. Energy is lost during the transformation of steam, electricity, and fuel into useful work (e.g., facility ventilation, nonprocess transportation) and heat (e.g., space heating, water heating). Applied Energy is the energy consumed in these nonprocess applications that translates directly into useful work and heat. It is determined by subtracting the end use losses from the total energy consumed for each nonprocess application.

These diagrams visually complement the Manufacturing Energy and Carbon Footprint analysis. Definitions of terms used in this Sankey diagram are at the bottom of this page.

Image of the Sankey diagram for nonprocess energy in the manufacturing sector

Data source: 2010 Manufacturing Energy and Carbon Footprint

thumbnail image of the Sankey diagram for onsite generation in the manufacturing sector
thumbnail image of the Sankey diagram for process energy in the manufacturing sector
thumbnail image of the Sankey diagram for nonprocess energy in the manufacturing sector

Terminology

Nonprocess Energy: Energy used for purposes other than converting raw material into manufactured product. MECS-specified categories of nonprocess energy include facility HVAC, facility lighting, onsite transportation, other facility support (e.g., cooking, water heating), and other nonprocess use.

Applied Energy: Amount of total primary energy employed in direct end use.

Nonprocess End Use Losses: Energy that is lost during the transformation of steam, electricity and fuel into useful work and heat for nonprocess applications.

Other Nonprocess: Remaining direct nonprocess uses not falling under a MECS-specified nonprocess end use category (e.g. cleaning equipment, pressure washing, testing equipment, maintenance tools).

Acronym

HVAC: Heating, Ventilation, and Air Conditioning

Notes

  1. The data source for this Sankey Diagram is the 2010 Manufacturing Energy and Carbon Footprint. The footprint analysis utilizes 2010 EIA Manufacturing Energy Consumption Survey (MECS) data, with adjustments, to quantify steam generation, electricity generation, and incoming fuel; onsite steam and electricity generation; and end use of electricity and fuel. Steam end use is not provided by MECS but rather is dependent on analysis alone. 
  2. Energy values represent aggregate sector-wide data in TBtu/yr, rounded to nearest whole number
  3. Excludes feedstock energy (byproduct fuels from feedstock are included)
  4. Arrow and box heights are proportional to flow size except for small flows for visual convenience
  5. Energy loss does not equate to recoverable energy, as a portion of these losses are thermodynamically unrecoverable
  6. Offsite generation shown on net basis (purchases, sales, and transfers accounted for)
  7. Offsite and onsite generation, offsite transmission and onsite steam distribution losses are not included in the Nonprocess Sankey