thermoelectric generator presentation

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Thermoelectric Generator ICY HOT Power the Way brought to you by Shaq

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Page 1: Thermoelectric Generator Presentation

Thermoelectric Generator

ICY HOT Power the Waybrought to you by Shaq

Page 2: Thermoelectric Generator Presentation

Overview

◦ A thermoelectric generator produces electricity using the Seebeck effect. It takes advantage of the heat flow due to a temperature difference between two substances.

◦ The heat flows through a thermoelectric plate and is converted into electricity.

Page 3: Thermoelectric Generator Presentation

Model

Thermoelectric plates StoppingMechanism

7 V Motor

Axel

HOT Side

HOT Side

COLD Side+

+

+

-

-

-

Styrofoam secondary container

Plastic primary container with cells

Medium Size Car

Page 4: Thermoelectric Generator Presentation

EXOTHERMIC REACTIONS1

Page 5: Thermoelectric Generator Presentation

Calcium Oxide Reaction

CaO(s) + H20(l) → Ca(OH)2(aq)◦ Upon Hydration, an exothermic

reaction occurs and the solid puffs up◦ Ratio: 1 L Water to 3.1 kg CaO → +

3.54 MJ◦ Temperature max: 100 oC

◦ Able to keep temperature at 100 oC through slaking time providing constant Heat

◦ Variables-Time required to convert all CaO to Ca(OH)2 (slaking time) -water to calcium oxide ratio-initial temperature of water

Page 6: Thermoelectric Generator Presentation

CH3COO- (aq) + Na+ (aq) + 3H2O(l) → CH3COONa • 3H2O (s)◦ Boil and stir solution of sodium acetate

trihydrate in water until all crystals dissolve and then cool the solution

◦ Drop a small crystal of CH3COONa • 3H2O to initiate nucleation

◦ Reaction goes to ~54oC

Crystallization of CH3COONa 3H2O

Page 7: Thermoelectric Generator Presentation

ENDOTHERMIC REACTION2

Page 8: Thermoelectric Generator Presentation

Ammonium Nitrate Reaction

NH4NO3(s) + H20(l)→ NH4+

(aq) + NO3-

(aq)

◦ Process involves dissolving ammonium nitrate in water

Kristi Chu
Take out second bullet and write the temperature differences for that bullet
Page 9: Thermoelectric Generator Presentation

Ba(OH)2. 8H2O(s) + 2NH4Cl(s) → 2NH3 (g) + 8H2O(l) + BaCl2. 2H2O(s)

◦ Dissolve 35g Ba(OH)2 & 17g NH4Cl◦ Temperature will decrease to ~ -20oC

←Barium Hydroxide

Ammonium Chloride →

Barium Hydroxide Octahydrate & Ammonium Chloride

Page 10: Thermoelectric Generator Presentation

Chemicals UsedMaterial NFPA Rating Bulk Cost Details

Calcium Oxide 3,0,2 1 kg $31 Stockroom

Ammonium Nitrate 0,0,3 1 lb (450g) $10 Amazon

Sodium Acetate 1,1,0 500g $33 Stockroom

Barium Hydroxide Octahydrate 2,2,0 500g $41 Stockroom

Ammonium Chloride 1,0,0 500g $22 Stockroom

TOTAL $ 137

Page 11: Thermoelectric Generator Presentation

◦ Control Variables: Amount of chemical (moles or grams)

◦ Recorded Variables: ▫ Plateau temperatures of the reactions (⁰C) ▫ Time it takes to reach plateau temperature (second)

▫ Time it stays at plateau temperature (second)

TESTING STAGE Procedure

Page 12: Thermoelectric Generator Presentation

SAFETY OPERATION Procedure

◦ All chemicals are injected into the reactor vessels with syringes at the start of the line.

◦ In case of an emergency, our car can be shut off by an on/off button, which cuts off the electricity of the entire car system.

◦ Chemicals are disposed properly based on their chemical properties and laboratory requirements.

Page 13: Thermoelectric Generator Presentation

Questions