Ocean Thermal Energy Conversion activities at Process & Energy

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Presentation transcript:

Ocean Thermal Energy Conversion activities at Process & Energy Carlos Infante Ferreira TU Delft

Faculty 3mE Delft Center for Systems Control Mechanical, Maritime & Materials Engineering 3mE Delft Center for Systems Control Precision and Microsystems Engineering Process & Energy BioMechanical Engineering Maritime & Transport Technology Materials Science and Engineering

Department Process & Energy Energy Technology Engineering Thermo dynamics Fluid Mechanics Intensified Reaction & Separation Systems

Efficiency of reversible thermodynamic cycles Hot reservoir Hot reservoir Hot reservoir Power cycle Heat pump Refrigeration cycle Cold reservoir Cold reservoir Cold reservoir

Efficiency of power cycles

Mean annual temperature difference between 20 and 1000 m

Efficiency of OTEC cycle & effect of heat exchanger design

Finite flow of reservoir fluids Hot reservoir Power cycle Cold reservoir

Efficiency of OTEC cycle & effect of heat exchanger design

Effect of working fluid selection Pure fluid: ammonia Mixture: ammonia-water 96%

Effect of working fluid selection / cycle design Pure fluid: ORC Mixture: Kalina cycle

Effect of cycle design: Multistage vs Kalina cycles Courtesy: Mathijs Vonk

Efficiency of OTEC cycle & effect of heat exchanger design Evaporator Hot water Condenser Cold water

Heat exchanger design Working fluid Water Courtesy: Menno Nuijten

Heat exchanger modelling for optimization purposes Desorber Absorber Courtesy: Joost Kirkenier

Retail electricity price in Caribbean countries (€/kWh)

Economic feasibility Courtesy: Joost Kirkenier

Integration with solar energy, air conditioning and sea water desalination

OTEC system challenges / conclusion OTEC cycle related Dedicated correlations heat & mass transfer & pressure drop Cycle optimization / working fluid optimization Heat exchanger optimization Expander design Technology for waste heat recovery Integration of solar energy related Use of solar energy for superheating / high pressure side increase Need for (latent) heat storage Economic feasibility Modification of experimental set-up for validation purposes Integration of direct contact desalination system Detailing of direct contact condensation including nozzle design Experimental set-up design / construction Validation experiments

Ocean Thermal Energy Conversion activities at Process & Energy Thank you for your attention!

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