CO₂ cascade heat pump system has been developed to realize an ultra‐low temperature below the triple point of 0.518 MPa and − 56.6°C or less by flowing dry ice solid‐gas state of CO₂ in a refrigeration system. Solid CO₂ in the refrigeration system may cause to block the flow in the evaporation...

Low-carbon hydrogen is considered as one of the key measures to decarbonise continental Europe and Japan. Northern Norway has abundant renewable energy and natural gas resources which can be converted to low-carbon hydrogen. However, Norway is located relatively far away from these markets and...

Low temperature Rankine cycle is a prominent solution for power generation in Waste Heat Recovery (WHR) application. The performance of this cycle is affected by various parameters including characteristics of the heat source, working fluid and constraints in the system. In cases where the heat...

This article proposes a solar water heater system induced by natural convective flow using supercritical CO₂ as a working fluid. The proposed solar water heater can produce thermal energy as hot water from solar thermal energy without any electric power consumption. In order to investigate the...