Process heat changes material or product condition as part of manufacturing. Replacing its energy source can therefore be a production change as well as a utility investment. The business case should begin with the process requirement and the plant's infrastructure. A technology described as efficient or low carbon in general still needs to be assessed for the specific duty and operating arrangement.
Define the required process behaviour
Record what the heat operation must achieve for the product. Consider temperature behaviour, timing, control and consistency where relevant to the duty. Distinguish the required material outcome from the settings of the existing equipment. This helps the team evaluate an alternative method without assuming that it must replicate every feature of the current installation.
US Department of Energy process heat guidance describes the transfer of heat to material in manufacturing. The investment application is to assess that transfer through the product requirement. A proposed heat source should be evaluated for how it affects the intended process, rather than solely for its installed rating or quoted operating cost.
Check the infrastructure before selecting equipment
Assess the electrical supply, distribution and other services required by the proposal with competent specialists. Identify connection work, control interfaces and any supporting changes. A conversion can depend on infrastructure outside the equipment supplier's scope. Put these dependencies into the programme so that the installation plan does not assume utilities will be ready automatically.
Consider whether other planned projects compete for the same infrastructure. The plant's demand can change through new production equipment or different schedules. Use documented assumptions and scenarios to examine those interactions. Do not build the investment case on an unverified belief that existing capacity will always be sufficient.
Compare the complete operating arrangements
Evaluate maintenance, control, support and the work needed to keep the process stable. Compare credible options under the intended production pattern, including starts, stops and product changes. Energy prices and emissions factors need current, appropriate evidence if used in financial or environmental calculations. This guide does not assume a particular tariff or carbon result.
Include the uncertainty around those assumptions in the decision. A conversion may remain attractive for reasons such as control or supportability even when one cost assumption changes. Explain which benefits are demonstrated, which are expected and which depend on future conditions. This gives investment reviewers a clearer view of the proposal's resilience.
Plan validation and transition together
Determine what trials and product approvals are needed before routine output can move to the new process. Include the time, material and inspection resources required. Define how deliveries will continue during conversion and how the plant will respond if commissioning takes longer than planned. The route to accepted production belongs in the capital plan.
Agree how actual performance will be reviewed after launch. Process heat electrification is strongest as an investment proposition when the product outcome, infrastructure and operating model have been assessed together. A complete case shows how the plant will make approved product through the new route, alongside the resource changes expected from it.
Sources & further reading
US Department of Energy: Process Heat Basics ↗
Basic technical description of process heat; no technology saving, tariff or emissions-factor claim is made.
Prepared 2026-10-13. Source references retained from that edition. Corrections and feedback.
