Volatile global energy markets have pushed natural gas prices to uncomfortable heights, emphasizing the urgent need for industries to rethink their energy strategies. One of the most impactful shifts underway is the electrification of industrial heat using industrial heat pumps and Mechanical Vapor Recompression (MVR) systems. These technologies make it possible to significantly reduce gas dependency, lower CO₂ emissions, and create long term resilience in energy intensive processes.
A practical approach to decarbonising industrial heat follows three steps:
- Reduce energy consumption
- Renewables and Replace
- Transition
Heat pumps and MVR systems fall within the second category as they replace fossil fuel consumption by using waste heat and electricity. They unlock the ability to recover, upgrade, and reuse thermal energy that would otherwise be lost. Often with remarkable efficiency.
Heat Pumps: Moving heat to Higher Value
Industrial heat pumps transfer heat from a lower temperature to a higher one using electrical energy. Most systems rely on a vapor compression cycle, consisting of evaporating, compressing, condensing, and expanding a refrigerant. Their performance is typically expressed as a Coefficient of Performance (COP), which indicates how much thermal energy is delivered per unit of electricity consumed.
Depending on the temperature lift, industrial heat pumps generally achieve COP values between 2 and 6, making them two to six times more efficient than electric boilers, which generally operate at a COP of approximately 1. Modern developments now allow heat pumps to reach temperatures of 200–250°C, significantly expanding their industrial relevance.
MVR Systems: Upgrading Low Pressure Steam
Mechanical Vapor Recompression uses a compressor to elevate low-pressure waste steam, such as vacuum steam or steam around 1 bar, to a higher pressure and temperature suitable for reuse in production.
During compression, the steam heats up substantially. Water is often injected at the inlet of the compressor to manage superheating. The result is usable process steam with very high efficiency. MVR systems can achieve high-end steam pressures, in some cases up to 65 bar, making them suitable for heavy industrial applications.
Because MVR relies on electricity rather than gas and reduces energy consumption, it can dramatically cut CO₂ emissions while improving operational stability in a volatile energy market.
Temperature Levels Determine the Business Case
The feasibility of heat pumps and MVR systems depends on two main variables:
- Temperature of the heat source (waste heat available)
- Required delivery temperature
A higher source temperature dramatically improves efficiency and reduces heat costs. A heat pump using high temperature waste heat often produces heat at a far lower cost than a gas boiler. At lower waste heat temperatures, the economics shift but high efficiencies are still possible at moderate temperature lifts.
Reassessing process requirements can also unlock opportunities. Many industrial steam networks operate at conservative pressures (e.g., 8–10 bar), even when processes could run at lower pressures, for example 5 bar. Lowering the required temperature or pressure can significantly strengthen the business case for electrification via heat pumps and MVR systems.
The Path Forward
Industrial heat electrification is no longer a futuristic concept. It is an essential step for companies aiming to reduce energy costs, improve sustainability, and shield themselves from volatile fossil fuel markets. With rapid technological advancements and strong financial incentives, heat pumps and MVR systems now offer viable, scalable solutions for a wide range of industrial processes.
Organizations that embrace this shift today will be better positioned to meet Net Zero targets, secure energy resilience, and future‑proof their production environments.
