Solar for Industrial Process Heat Analysis
NREL is developing the first national analysis of the potential for solar technologies to power a wide array of manufacturing applications.
As part of the multiyear Solar for Industrial Process Heat (IPH) project, researchers are evaluating the potential of photovoltaics (PV), solar thermal, and hybrid approaches that produce electricity and/or heat to power a broad range of manufacturing IPH end uses. This analysis will explicitly account for load-reduction potential from energy efficiency measures and load-balancing potential from energy storage technologies.
By developing data sets, tools, and analyses on the integration of solar and manufacturing IPH at both the process and country levels, NREL will enable strategic decision making around this largely unexplored opportunity for solar energy expansion.
In the United States, manufacturing IPH is currently dominated by natural gas and coal combustion, a trend that has remained relatively unchanged for several decades.
In fact, fossil fuels provided 90% of reported manufacturing process heat energy in 2014 and 92% in 1992.
The first phase of the solar IPH project has expanded the characterization of energy used for manufacturing process heat in 2014. With this data, it is now possible to identify counties and periods during the year where process heat demand could be met with solar technologies. One new, significant observation is that about two-thirds of process heat is used for applications below 300°C (572°F). The data sets are available for download from the NREL Data Catalog.
Figure 2 identifies the process heat use by county. Counties that have the largest process heat use tend to have high concentrations of energy-intensive industries, such as refining and petrochemicals in Harris County, Texas; pulp and paper mills in Somerset County, Maine; and wet corn milling and ethyl alcohol in Linn County, Iowa.
In the current phase of the project, researchers are developing analysis capabilities to estimate the technical opportunities for different solar technologies to meet process heat demand based on available land area. Complementary economic analysis is also underway to compare solar technologies with incumbent combustion technologies in a series of case studies.
Related Publications and Resources
The Industry Energy Tool (IET): Documentation, NREL Technical Report (2019)
Generation and Use of Thermal Energy in the U.S. Industrial Sector and Opportunities to Reduce Its Carbon Emissions, NREL Technical Report (2016)
Initial Investigation into the Potential of CSP Industrial Process Heat for the Southwest United States, NREL Technical Report (2015)
Solar Process Heat Basics on NREL.gov
Solar Industrial Process Heat in the News
Industry’s Hunger for Heat Drives Energy Demand, JISEA.org (August 2019)