Ocean Thermal Energy Conversion

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Ocean Thermal Energy Conversion

  1. 1. Ocean Thermal Energy Conversion Major Project Presentation Group members: SUMAN SOURABH - 065 GANDHARV RANA - 067 VIKRAM JASWAL - 068 GAURAV KAPOOR - 090
  2. 2. Content Layout • Introduction • State of technology • Schematic diagram • Materials used • Working • Efficiency • Pros and Cons • Future prospects • Queries ?
  3. 3. INTRODUCTION • Ocean Thermal Energy Conversion (OTEC) is a technology for generating renewable energy that uses the temperature difference between the deep cold and relatively warmer surface waters of the ocean to generate baseload electricity. • Since OTEC exploits renewable solar energy, recurring costs to generate electrical power are minimal. • The high fixed costs dominate the economics of OTEC to the extent that it currently cannot compete with conventional power systems.
  4. 4. TYPES 1. OPEN CYCLE OTEC 2. CLOSED CYCLE OTEC
  5. 5. STATE OF TECHNOLOGY • Closed cycle OTEC. • Conventionaly, Cold sea water is used as a heat exchanger. It is inefficient and reduces the overall efficiency by 10-15%. • We have used THERMOELECTRIC MODULE for make this process more efficient. • A water level detector which indicates critical water levels in the surface water holding tank.
  6. 6. Contd...... • We have used THERMOELECTRIC MODULE for make the condensor more efficient. • The module is connected in closed cycle. • The 5V DC output is provided to the module which, according to “PELTIER EFFECT”, produces a temperature difference ie. a cold surface on one side and hot surface on the other. • The colder surface of the module is attached to the condensor which improves the condensation of unutilized steam and thus increases the overall cycle efficiency of OTEC.
  7. 7. SCHEMATIC INLET WATER TANK WITH WATER LEVEL INDICATOR BOILER PRESSURIZER TURBINE CONDENSER WITH TEC MODULE STEP UP TRANSFORMER RECTIFIER BATTERY STORAGE AC APPLICATIONS 3V AC, 3000 rpm 3v to 9v AC
  8. 8. MATERIALS USED • PRESSURE COOKER as a boiler. • 3V AC, 3000 rpm tubine. • 3-9V AC Step up Transformer. • TEC-12709 Termoelectric Module with condenser. • Elecronic componenets : Diodes, NPN Transistors, LM5708, Buzzer, circuit board.
  9. 9. WORKING • Inlet water tank holds the ocean surface water . A water pump is used to move the water to the boiler. We have used pressure cooker as a boiler. • The steam produces rushes to the turbine section thereby rotating the 3V AC,3000rpm turbine. • A step up transformer used steps up the voltage to 9V. • The rectifier section converts the AC voltage to DC voltage which is used to charge a battery. By using a voltage limiter circuit , we can also charge a mobile. • The unused steam from the turbine reaches the condenser where the steam is converted to water , which is fedback to the water inlet tank.
  10. 10. EFFICIENCY Carnot efficiency : E(c) = 1 – T(c) / T(h) Temperatures needs to be in Kelvins, so : 1.0°C = 1.0 + 273 = 274K 100°C = 100° + 273 = 373K Therefore : E(c) = 1 - 274K / 373K = 0.26541 (about 26.54 %) Carnot efficiency : E(c) = 1 – T(c) / T(h) Temperatures needs to be in Kelvins, so : 4.0°C = 4.0 + 273 = 277K 25°C = 25° + 273 = 298K Therefore : E(c) = 1 - 277K / 298K = 0.070 (about 7 %) OUR PROJECT CONVENTIONAL METHOD
  11. 11. Pro’s Reneweble Fresh Water in open loop Refrigeration and Air Conditioning Agriculture
  12. 12. Con’s Impingement and Entrainment Biocide Treatments Effect on marine life Efficieny and Economics
  13. 13. FUTURE PROSPECTS • OTEC technology has the potential to be integrated with other commercial systems (e.g., aquaculture and sea water air conditioning) and products (e.g., potable water, ammonia, and hydrogen). • Energy and Economics can be enhanced by employing super efficient Hybrid cycle OTEC. • Addressing Impacts of OTEC.
  14. 14. QUERIES ??
  15. 15. THANK YOU

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