Thermoelectric Stove for Haiti Electrical Engineers: Lauren Cummings, Colin McCune, Andrew Phillips, Xiaolong Zhang Mechanical Engineers: Marissa Blockus, Sam Huynh, Bri Stephenson-Vallot, Dustin Tyler Industrial Engineer: Brandon Harbridge Kate Gleason College of Engineering | Rochester Institute of Technology Electrical System Design Mechanical System Design The mechanical design features: 1. A stove intended to reduce emissions and increase efficiency 2. An air duct and a beam that directs both cool air from a fan and heat from the stove to the TEG unit The electrical system uses an Maximum Power Point Tracking (MPPT) technique to obtain the largest amount of power from the TEG unit. Both the battery and the MPPT provide power to the fan in the mechanical system as well as the USB charging system. Special Thanks: Dr. Robert Stevens, Professor Ed Hanzlik, Dr. Jagdish Tandon, Mr. Neal Eckhaus, Dr. Lynn Fuller, Mr. Rob Kraynik, Mr. Dave Hathaway, Satchit Mahajan, and H.O.P.E. for Haiti Heat from the stove is absorbed into one side of the TEG while cool air from a fan helps to reject heat from the TEG on the other side. With one side cooled and the other side heated, the TEG generates electricity, and provides to a USB charger, which powers electronics such as cell phones Motivation •Over 3 billion people use plant material or animal waste (biomass) as fuel for cooking which requires a considerable amount of their income, energy, and time collecting and preparing the fuel •Using biomass leads to deforestation, which is a big problem in Haiti •Most people in the Haiti live on $2 a day •1.6 million people die each year from indoor air pollution •The 2010 earthquake has left people in Haiti without vital resources Customer Needs | Our Goals We set out to create a stove system that: 1.Reduces fuel use by half; 2.Reduce emissions; 3. Increases efficiency and thus reduces costs for cooking; 4. Allows locals to easily manufacture and sell the stove 5. Is intuitive, transportable, and enhances conventional cooking techniques for traditional foods; 6.Provides an electrical power source; and 7.Improves the air quality for women and children System Integration – Thermoelectric Generator (TEG) Resu lts CCT Rebar Stove Targeted Performance CCT New Stove Tim e to Boil (m in) 25 15 19 Total Fuel Use (kg) 0.760 0.380 0.674 Start 0.459 0.230 0.352 Cook 0.403 0.202 0.322 CO (g) 25.0 6.3 19.4 Start 7.7 1.9 6.6 Cook 17.3 4.3 12.8 PM (m g) 15.2 3.8 8.2 We have reduced the time to boil, from the time the pot is place on the fire, to 19 minutes. Reduced fuel burn during the start up by 23% Reduced fuel burn during the cook portion by 20% Decreased carbon monoxide by 22% Reduced particulate matter by 46% Mechanical System Electrical System Controlled Cook Test – A realistic test, emulating results that would be achieved in the field. Temperature Difference and Power Production – Determined based on circuit voltage of TEG hooked up to an external resistance equal to electrical resistance of TEG Tests of the whole system with varying temperature from 100 C to 200 C are shown above. As expected, TEG and battery current goes down when the temperature drops. Negative battery means battery is discharging. It results in decline power of TEG. Both fan and USB currents and voltages are constant as designed, that results in constant power outputs.

Thermoelectric Stove for Haiti Electrical Engineers: Lauren Cummings, Colin McCune, Andrew Phillips, Xiaolong Zhang Mechanical Engineers: Marissa Blockus,

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Page 1: Thermoelectric Stove for Haiti Electrical Engineers: Lauren Cummings, Colin McCune, Andrew Phillips, Xiaolong Zhang Mechanical Engineers: Marissa Blockus,

Thermoelectric Stove for HaitiElectrical Engineers: Lauren Cummings, Colin McCune, Andrew Phillips, Xiaolong ZhangMechanical Engineers: Marissa Blockus, Sam Huynh, Bri Stephenson-Vallot, Dustin Tyler

Industrial Engineer: Brandon HarbridgeKate Gleason College of Engineering | Rochester Institute of Technology

Electrical System Design Mechanical System Design

The mechanical design features:1. A stove intended to reduce emissions and increase efficiency2. An air duct and a beam that directs both cool air from a fan and heat from the stove to the TEG unit

The electrical system uses an Maximum Power Point Tracking (MPPT) technique to obtain the largest amount of power from the TEG unit. Both the battery and the MPPT provide power to the fan in the mechanical system as well as the USB charging system.

Special Thanks: Dr. Robert Stevens, Professor Ed Hanzlik, Dr. Jagdish Tandon, Mr. Neal Eckhaus, Dr. Lynn Fuller,Mr. Rob Kraynik, Mr. Dave Hathaway, Satchit Mahajan, and H.O.P.E. for Haiti

Heat from the stove is absorbed into one side of the TEG while cool air from a fan helps to reject heat from the TEG on the other side.

With one side cooled and the other side heated, the TEG generates electricity, and provides to a USB charger, which powers electronics such as cell phones

Motivation•Over 3 billion people use plant material or animal waste (biomass) as fuel for cooking which requires a considerable amount of their income, energy, and time collecting and preparing the fuel•Using biomass leads to deforestation, which is a big problem in Haiti•Most people in the Haiti live on $2 a day•1.6 million people die each year from indoor air pollution•The 2010 earthquake has left people in Haiti without vital resources

Customer Needs | Our GoalsWe set out to create a stove system that:

1.Reduces fuel use by half;2.Reduce emissions;3. Increases efficiency and thus reduces costs for cooking;4. Allows locals to easily manufacture and sell the stove 5. Is intuitive, transportable, and enhances conventional cooking techniques for traditional

foods;6.Provides an electrical power source; and7.Improves the air quality for women and children

System Integration – Thermoelectric Generator (TEG)

Results

CCT Rebar Stove

Targeted Performance

CCT New Stove

Time to Boil (min) 25 15 19

Total Fuel Use (kg) 0.760 0.380 0.674

Start 0.459 0.230 0.352

Cook 0.403 0.202 0.322

CO (g) 25.0 6.3 19.4

Start 7.7 1.9 6.6

Cook 17.3 4.3 12.8

PM (mg) 15.2 3.8 8.2

We have reduced the time to boil, from the time the pot is place

on the fire, to 19 minutes. Reduced fuel burn during the start up by 23% Reduced fuel burn during the cook portion by 20% Decreased carbon monoxide by 22% Reduced particulate matter by 46%

Mechanical System Electrical System

Controlled Cook Test – A realistic test, emulating results that would be achieved in the field.Temperature Difference and Power Production – Determined based on circuit voltage of TEG hooked up to an external resistance equal to electrical resistance of TEG

Tests of the whole system with varying temperature from 100 C to 200 C are shown above. As expected, TEG and battery current goes down when the temperature drops. Negative battery means battery is discharging. It results in decline power of TEG. Both fan and USB currents and voltages are constant as designed, that results in constant power outputs.