CSP’s role in reducing emissions in challenging sectors
Hard-to-electrify sectors—such as cement, steel, chemicals, and some industrial heating processes—often need very high temperatures or continuous heat where electrification with conventional electric heaters is costly or impractical. Concentrated solar provides direct high-temperature thermal energy and, when coupled with storage, can supply reliable heat for these uses.
Ways CSP supports decarbonization:
- Process heat substitution: CSP can replace fossil-fuel boilers and furnaces for drying, calcination, and other thermal processes at required temperatures.
- Hybridization: CSP can be combined with residual fuels or electrified processes to provide baseline heat while enabling renewable integration.
- Chemical feedstocks and hydrogen: High-temperature heat from CSP can drive thermochemical processes and high-temperature electrolysis or heat-assisted hydrogen production.
Benefits compared to direct electrification:
- Efficiency at high temperatures: CSP often delivers heat more directly and efficiently for very high-temperature processes than converting electricity to heat via resistive heaters.
- Reduced operational emissions: Direct substitution of fossil fuels can significantly lower CO2 emissions and local pollutants.
Challenges and enablers:
- Site-specific integration: Industrial facilities need sufficient DNI and land or hybrid layouts for CSP deployment.
- Process redesign: Some processes need retrofitting to accept solar heat or thermal storage, which requires engineering investment.
Overall, CSP offers a practical pathway to decarbonize sectors that need high-temperature, continuous heat, especially when paired with thermal storage and process integration strategies that maintain industrial productivity while reducing emissions.