Enerin achieves over two years HoegTemp runtime at three industrial sites

The HoegTemp™ industrial heat pump is installed in two simple containers in the biogas stream at the IVAR Municipal Waste Water Treatment Plant (above). The IVAR installation is situated near Stavanger in Norway. The three machines can be seen below: GE Healthcare (left), Pelagia (centre), and IVAR (right).

Enerin celebrates major runtime milestone

Enerin has reached a major milestone: our three full-scale high-temperature HoegTemp™ heat pump industrial pilot installations have surpassed 17,520 operational hours, or runtime, the equivalent of over two full years of operation.  

Since commissioning in November 2023, the IVAR biogas plant has been a key contributor to this milestone, alongside operation at GE Healthcare and Pelagia. 

“This milestone is not just about hours — it’s about impact. Every hour our systems runs is an hour where fossil heat is avoided,” Enerin CEO, Arne Høeg says.

“Reaching 17,520 hours shows that industrial decarbonisation is no longer theoretical. It’s happening, with clear benefits for both industry and the climate. The combined result is 1,500 tonnes of avoided CO2 emissions from the three pilot installations,”  he said.

Runtime of plants

In industrial settings, operational hours are a measure of reliability. Chemicals, paper, and food processing plants typically operate anywhere from 4,000 to 8,500 hours per year, depending on the process and uptime model, or conditions. 

Plants usually do not run 24/7 without interruption. Uptime depends on whether a plant runs a single day shift, as in batch processing, multiple shifts, continuously, or even seasonally when products are shipped, or harvests are completed, not forgetting the time taken for maintenance cycles. 

Operational data from IVAR, GE Healthcare and Pelagia informs next generation design

“Together with the teams at IVAR, GE Healthcare and Pelagia, Enerin’s engineers have collected valuable information about the performance of the HoegTemp™, which feeds into the design of the next generation of our heat pumps where we aim to achieve even higher efficiency, uptime, and reliability,” Arne concludes. 

The milestone builds on the team's experience from their pre-Enerin days where the legacy HighLift heat pump accumulated 33,000+ hours of operation at two sites (with three installed heat pumps), bringing the team’s total experience with the Stirling-cycle to 50,000 hours. 

Next installation will be at Roche, Switzerland

Looking forward, the team is now preparing for the deployment of the next installation at Roche in Basel, Switzerland, this Summer.  Enerin has signed a contract with Roche to supply a HoegTemp high-temperature heat pump (HTHP) totalling 1.2 megawatts to the Roche Basel/Kaiseraugst site located in Basel.