Thermoelectric-Enhanced Cookstove Addon (TECA) for Clean Biomass Cookstoves. David Stokes. Enhanced M-5000 Stove. M-5000 Stove

Transcription

1 Thermoelectric-Enhanced Cookstove Addon (TECA) for Clean Biomass Cookstoves Enhanced M-5000 Stove M-5000 Stove DOE BETO Cookstoves Program Review David Stokes RTI International RTP, NC January 28-29, 2016 University of Washington Seattle, WA Program Name or Ancillary Text

2 Project Goals and Objectives Goal: Develop an affordable add-on device to enhance biomass cookstove performance to approach Tier 4 standards (41 mg/mjd) Approach: Forced draft add-on device for an existing biomass rocket stove Thermoelectric power generation for self-sufficient operation Partnership between RTI, Envirofit International, and Colorado State University Results: Lab PM emissions at 83 mg/mjd (70% reduction compared to baseline, 92% reduction from traditional stoves) Developed stove optimization approach that reduces experiments Field PM reduction demonstrated: (air stove compared to baseline) operated w/ cut fuel = 76% reduction Local user w/ local fuel = 70% reduction Field results match or exceed lab test results of 70% reduction 2

3 Stove Emissions Comparison Lab emissions: CO g/mjd Tier 4 PM 83 mg/mjd Tier % reduction (vs.m-5000) 92% reduction (vs.3-stone) Current emissions performance Previous emissions performance 3

4 Aurangabad, India Field Prototype Testing 4

5 Aurangabad, India Field Prototype Testing 5

6 Photo: Local User-Local Fuel 6

7 Aurangabad, India Field Prototype Testing Fuel Standard M-5000 Enhanced M-5000 with RTI TECA Engineered Wood (pine) 1) operated (3 replicates) 2) operated (3 replicates) Indian Wood (Neem sticks) 3) Local user operated (3 replicates) 5) operated (1 sample) 4) Local user operated (3 replicates) 6) operated (1 sample) 7

8 Field Emissions Replicate Testing Field Emissions Test Performance - PM2.5 PM2.5 Concentration (µg/m3) % reduction 77% reduction 70% reduction 18% reduction* 0 Air Stove Air Stove Local User Air Stove Local User Local User Air Stove Local User * Note that local user operated simmer at high firepower and air flow was not optimized 8

9 Field Emissions Non-Replicate Testing Field Emissions Test Performance - PM PM2.5 Concentration (µg/m3) % reduction 46% reduction 89% reduction* 86% reduction* Tech/Local Fuel Air Stove Tech/Local Fuel Tech/Local Fuel Air Stove Tech/Local Fuel Air Stove + Air Stove + * Continuous tracking control of TE voltage and the blower 9

10 Reliability Test Stove at Start and After 5000 hrs of Testing 24/7 Durability lab in India 2 hour cycle 1 hr burn/1 hr cool down India Reliability Test Data - June 5-10, 2015 (Start) Temperature ( C) Thot Thot/Vte Vte Elapsed Time (min) 10

11 Reliability Test Stove at Start and After 5000 hrs of Testing Start of Testing After 5000 hrs 11

12 FGD Group 1 12

13 Summary Core advancements: Robust self-powered forced draft continuous feed rocket stove New testing approach to accurately measure field performance Results: Demonstrated 83 mg/mjd PM performance in the lab (70% reduction vs. baseline, 92% reduction from traditional stoves) Demonstrated 70% reduction in emissions (vs. baseline) in the field Research impact: Simplified approach developed to optimize cookstove emissions Greater understanding of forced draft mechanisms for emission reduction Approach for bring lab and field emissions measurements closer together Partners: Envirofit International Colorado State University 13