Experimental establishment and characterization of a molten salt based thermal energy storage systems for industrial process heating
Background
Process heat represents 37% of the total industrial energy demand in the EU, with a significant share of fossil fuel-based energy sources. In this context, the food and beverage sector constitutes one of the largest consumers of process heat in the temperature range between 100-500°C and therefore is a key sector for decarbonization. The dairy processing units are highly energy intensive, and around 12.000 of such facilities are spread across the EU.
This work presents a techno-economic assessment of a high-temperature Stirling heat pump retrofitting a milk powder production plant operating on gas boilers. Stirling cycles can offer higher temperature lifts and reliably operate up to 200°C, functioning on closed heated regenerative gas cycles. The Stirling heat pump investigated works with helium (R704) which is an inert, non-toxic refrigerant with zero ozone depletion potential and null global warming potential, therefore being ideal for food processing applications where product quality is indispensable. Refrigerants that could potentially compromise production by contaminating the process must be avoided.
Objective and goals
The primary objective of the thesis is to support the activities towards establishment of a fully functioning molten salt based thermal energy storage facility and develop a lab-based charging & discharging test setup.
Timeline
January 2026 – June 2026 (flexible)
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