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Surplus heat utilization

Surplus heat utilization

SINTEF has broad experimental and numerical expertise within all important aspects of technology development for utilization and conversion of surplus heat.

SINTEF has broad experimental and numerical expertise within all important aspects of technology development for utilization and conversion of surplus heat:

  • Surplus heat capture
  • Direct re-use
  • Upgrading to higher temperature or refrigeration
  • Conversion to electric power

The laws of nature dictates that reusing the recovered energy as heat has higher efficiency (lower losses) than converting it to electric power. On the other hand, electrical energy have considerable advantages in flexible distribution and universal demand. It is usually a relatively limited heat demand in the surrounding areas due to the localisation of energy intensive industry in Norway.

Our services and customers:

Industrial surplus heat is a common byproduct from combustion or production processes, and despite large potential for re-utilization, it is commonly released into the ambient. We develop knowledge, competence, and technology for the capture, reutilization and upgrading of industrial surplus heat. We work for and together with Norwegian and international industry over a range of sectors, such as:

  • Material- and metal producing industry
  • Oil and gasChemical and process industry
  • Shipping and marine
  • Technology providers

Research topics in some typical current projects:

  • Capture of surplus heat from process streams and surfaces
  • Re-utilization of surplus heat and heat integration
  • Upgrading surplus heat to higher temperature or steam production
  • Conversion if surplus heat to electric power
  • Unique expertise on CO2-technology (trans-critical processes) and natural working fluids
  • Compact and efficient heat exchangers; design and optimization

Method:

We develop knowledge and technology through a good balance of theoretical considerations, numerical models, and experimental investigations. We continuously develop advanced in-house models for e.g.:

  • Non—stationary processes and dynamic system simulation
  • Optimization and analysis of operation parameters or part load behaviour
  • Optimization of complex system layouts
  • Detailed component models, particular focus on heat exchangers
  • Life cycle analysis, cost-benefit and environmental impact of heat pumping systems

We maintain and evolve advanced laboratories with test facilities for:

  • Heat exchangers and compressors (0.5 – 100 kW)
  • Recovery of expansion work (Ejector / Expander)

Typical projects for us are:

  • Develop new concepts to solve specific problems in the industry
  • Design and optimize energy efficient system layouts
  • Analyze, evaluate and compare alternative technologies and concepts
  • Optimize existing industrial processes
Heat recovery from smelter off-gas at Finnfjord (ferrosilicon). Foto: SINTEF/Trond Andresen

Relelvant projects:

Research Scientist