Design and development of a low-cost,electricity-generating cooking Score-Stove™

Abstract

A design of the thermo-acoustic engine to combustion interface of an electrically generating clean cookstove is presented. Social surveys carried out by the SCORE project have indicated that adding electrical generation to a clean cookstove should increase their uptake considerably above the current 8% level (outside China) as electricity is perceived as high value and so wanted by the communities. This work discusses the development process, using elements of the formal design methodology BS 7000 to design a mass-producible, easy-to-manufacture, low-cost cooking stove that uses a thermo-acoustic engine to produce electricity whilst cooking. The iterative design process is discussed with analyses made of predicted cost and performance at each iteration and compared with the targets set from social surveys. With currently available technology and suitable investment in tooling and production facilities, estimated production costs are £100. An independent audit by engineers and cost estimators from a large international blue chip company made a prediction of £150. At this stage of the design, this is considered a quite good correlation. Proposals for bringing this cost down to £60 are made. To obtain lower costs would require more research. SCORE market evaluations indicate that at the upper-cost target of £60 (2007 prices), 60 million people would afford the stove. A wood-burning Score-Stove™2 prototype successfully developed 22.7 W of electricity based on the presented planar thermo-acoustic engine design, indicating that the new Score-Stove™2 design may have the potential, when manufactured in volume, to meet the social and cooking requirements of rural people in developing countries.

Keywords

Electricity Score-Stove™thermo-acoustic engine

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References

Maes

Verbist

. Increasing the sustainability of household cooking in developing countries: policy implications. Renewable Sustainable Energy Rev 2012; 16: 4204–4221.

Jan

. What makes people adopt improved cookstoves? Empirical evidence from rural northwest Pakistan. Renewable Sustainable Energy Rev 2012; 16: 3200–3205.

Jan

Khan

Hayat

. Determinants of rural household energy choices: an example from Pakistan. Pol J Environ Stud 2012; 21: 635–641.

Geller

. Cooking in the Ungra area: fuel efficiency, energy losses, and opportunities for reducing firewood consumption. Biomass 1982; 2: 83–101.

Kaygusuz

. Energy for sustainable development: a case of developing countries. Renewable Sustainable Energy Rev 2012; 16: 1116–1126.

Yao

Chen

. Analysis of rural residential energy consumption and corresponding carbon emissions in China. Energy Policy 2012; 41: 445–450.

Makonese

Pemberton-Pigott

Robinson

. Performance evaluation and emission characterisation of three kerosene stoves using a Heterogeneous Stove Testing Protocol (HTP). Energy Sustainable Dev 2012. 16(3): 344–351. Available at: https://www-sciencedirect-com.web.bisu.edu.cn/science/journal/09730826/16/ .

Laumbach

Kipen

. Respiratory health effects of air pollution: update on biomass smoke and traffic pollution. J Allergy Clin Immunol 2012; 129: 3–11.

Oluwole

Otaniyi

Ana

. Indoor air pollution from biomass fuels: a major health hazard in developing countries. J Public Health 2012; 20: 565–575.

10.

Abeliotis

Pakula

. Reducing health impacts of biomass burning for cooking—the need for cookstove performance testing. Energy Effic 2013, pp. 1–10.

11.

Still

Winiarski

. Increasing fuel efficiency and reducing harmful emissions in traditional cooking stoves. Boiling Point 2001; 47: 36–39.

12.

World Bank. Household cookstoves, environment, health, and climate change: a new look at an old problem, Washington, DC: The World Bank, 2011.

13.

Chen BM, Abakr YA, Riley PH, et al. Development of thermoacoustic engine operating by waste heat from cooking stove. In: The 4th international meeting of advances in thermofluids (IMAT 2011), Melaka, Malaysia, 2011, pp.532–540.

14.

Jaworski

Backhaus

. A low-cost electricity generator for rural areas using a travelling-wave looped-tube thermoacoustic engine. Proc IMechE, Part A: J Power and Energy 2010; 224: 787–787.

15.

Gardner C and Lawn CJ. System design requirements for the SCORE project. Presented at: The international conference on low-cost, electricity generating heat engines for rural areas, Nottingham, UK, April 2012.

16.

Sanchez

Dennis

Pullen

. Cooking and lighting habits in Rural Nepal and Uganda SCORE project. Proc IMechE, Part A: J Power and Energy 2013; 227 (this issue).

17.

Saha

Riley

Paul

. Halbach array linear alternator for thermo-acoustic engine. Sens Actuators, A 2012; 178: 179–187.

18.

De Blok

. Low operating temperature integral thermo acoustic devices for solar cooling and waste heat recovery. J Acoust Soc Am 2008; 123: 3541–3541.

19.

Swift

Garrett

. Thermoacoustics: a unifying perspective for some engines and refrigerators. J Acoust Soc Am 2003; 113: 2379–2379.

20.

Jaworski

. Impact of acoustic impedance and flow resistance on the power output capacity of the regenerators in travelling-wave thermoacoustic engines. Energy Convers Manage 2012; 51: 350–359.

21.

Saechan

Jaworski

. A method of characterising performance of audio loudspeakers for linear alternator applications in low-cost thermoacoustic electricity generators. Appl Acoust 2011; 72: 260–267.

22.

Chen

Abakr

Riley

. Development and assessment of thermoacoustic generators operating by waste heat from cooking stove. Engineering (ENG) 2012; 4: 894–902.

23.

Luo

Dai

. A 100 W-class traveling-wave thermoacoustic electricity generator. Chin Sci Bull 2008; 53(9): 1453–1456.

24.

Lawn

. Computational modelling of a thermo-acoustic travelling wave engine. Proc IMechE, Part A: J Power and Energy 2013; 227(4): 498--514.

25.

Riley

Saha

Johnson

. Designing a low-cost, electricity-generating cooking stove. Technol Soc Mag IEEE 2012; 29: 47–53.