Updated on December 28, 2023

·

Created on November 12, 2018

Wisdom Stove M2

Upcoming Update

Wisdom Stove M2 is a natural draft gasifier that has the capacity to use in a continuous process both dry biomass and its formed char as cooking fuels.

Developed By
  1. Wisdom Stoves
Tested By
  • The Partnership on Women’s Entrepreneurship in Renewables (wPOWER)
  • University of Nairobi
Content Partners
Unknown

Author

Product Description

The Wisdom Stove M2 is a top lit up-draft gasification cookstove designed to burn different types of biomass such as wood, corn, husks, cow dung, coffee husks and dried biomass briquettes. The product was designed by Wisdom Stoves and is manufactured and distributed by Wisdom Innovations.

Target SDGs

SDG 7: Affordable and Clean Energy

SDG 3: Good Health and Well-Being

Market Suggested Retail Price

$37.00

Target Users (Target Impact Group)

Household

Distributors / Implementing Organizations

Wisdom Innovations.

Competitive Landscape

Manufacturing/Building Method

The Wisdom Stove M2 is manufactured by Wisdom Innovations. The cookstove is made with locally available materials and manufactured by a locally trained workforce in North Kinangop, Kenya. All of the stoves components are manually manufactured, including the outer cylinder, fuel cylinder, concentrator lid, riser and handles. Most of the M2 components are constructed with mild, galvanized or stainless steel metal sheets except the ceramic insert.

Intellectural Property Type

Trademark

User Provision Model

Wisdom Stoves M2 are distributed through microfinance institutions, SACCOs, dairy co-operatives/societies and other organized groups.

Distributions to Date Status

Exact number unknown, however according to wPOWER some 3,700 stoves have been sold across four counties in Southwest Kenya: Kiambu, Nyandarau, Narok, and Nakuru.

Fuel type

Wood, corn, husks, cow dung, coffee husks and dried biomass briquettes

Pot type

Flat and round bottom

Thermal efficiency (%)

26.65

PM emissions (g/MJ delivered to pot)

246.0

CO emissions (g/MJ delivered to pot)

0.966

Time to boil (min/L)

Cold start: 19
Hot start: 16

Design Specifications

The Wisdom Stove M2 is a Top-lift updraft gasifier and it's design is primarily composed of two concentric cylindrical containers. The inner container is the fuel cylinder and has holes that function as primary air inlets to gasify the fuel, while the outer container serves as a structural component and has another set of holes that function as secondary air inlets to burn the fuel gas. The M2 is a natural draft cookstove, primary and secondary air required for combustion are circulated naturally. The design also includes a ceramic insert to retain heat. Specifications: Maximum Pot Capacity: 15 L Dimensions (l/w/h): 280/280/430 mm

Product Schematics

Technical Support

User manual of the stove is available in both English and Kwahili. It is possible to contact local technicians through a customer care line.

Replacement Components

Contact the manufacturer.

Lifecycle

5 years.

Manufacturer Specified Performance Parameters

Designers specified performance targets include cooking and production of charcoal simultaneously, reduction of harmful smoke, environmental conservation awareness and cost savings in fuel consumption.

Vetted Performance Status

The Department of Chemistry Laboratories from the University of Nairobi conducted the approved simulation of the cooking process, the Water Boiling Tests (WBT). The tests showed average values for the measures of:

  • How efficiently a stove uses fuel to heat water in a cooking pot.
  • Quantity of emissions produced while cooking.
The Partnership on Women’s Entrepreneurship in Renewables (wPOWER), under their “Where are the women in the energy sector” series, developed a case study on a six-month project undertaken by Wisdom Innovations. wPOWER stated the key findings on Wisdom Innovation’s performance as:
  • Women play a critical role as key drivers in the household clean energy supply chain.
  • Recruitment of women as local sales and customer service agents provides insight into the local dynamics of the communities they work in.
  • Working with established women’s networks promotes sustainable adoption of clean energy technologies.
  • Providing access to affordable finance is essential in ensuring clean cooking solutions are made available to low-income households.

Safety

The safety concerns associated with the usage of biomass burning cookstoves are primarily related with carbon dioxide, carbon monoxide and sulfur dioxide emissions. Another significant safety concern is domestic accidents such as accidental burning or spill-overs.  

Complementary Technical Systems

None.

Academic Research and References

Ehrensperger, A., Gatimu, J., Willi, S., Kitala, J., Okoko, A., Shuma, J., Sago, S., Kiteme, B., Wymann von Dach, S. 2017. What future for cooking with solid biomass? The benefits of improved stoves and micro-gasifiersProBE Policy Brief 1.

Tryner J, Willson B, Marchese A. 2014. The effects of fuel type and stove design on emissions and efficiency of natural-draft semi-gasifier biomass cookstoves. Energy for Sustainable Development, 23: p. 99-109.

2017. Advanced biomass cookstove distribution. Winrock International.

2018. Wisdom Innovations Case Study: Where are the women in the energy sector?. Partnership on Women’s Entrepreneurship in Renewables.

Our Cookstoves | Wisdom Stoves. n.d. www.wisdomstoves.org.

Wisdom Stoves’ Making of Gasification Cookstoves in Kenya. 2013. www.youtube.com.

Wisdom Stoves. n.d. www.facebook.com. Wisdom Stoves.

Clean Cooking Alliance – Clean Cooking Catalog: Results Report – Wisdom Jiko – M2 Model. n.d. www.catalag.cleancookstoves.org. Global Alliance for Clean Cookstoves.

Wisdom Stoves M2 User Manual | ManualsLib. n.d. www.manualslib.com.

International Standards Organization (ISO). n.d. ISO’s International Workshop Agreements.

Global Alliance for Clean Cookstoves. 2013. Interim Reporting Requirements for IWA Tiers of Performance. cleancooking.org. Global Alliance for Clean Cookstoves.

International Standards Organization (ISO). n.d. Home. iso.org. ISO.

Global Alliance for Clean Cookstoves . 2014. The Water Boiling Test (Version 4.2.3): Cookstoves Emissions and Efficiency in a Controlled Laboratory Setting. www.1library.net. Global Alliance for Clean Cookstoves.

Compliance with regulations

Complies with the following cookstoves rating for the International Workshop Agreements as a streamlined process of the International Organization for Standarization (ISO) :

  • Tier 2 for emissions.
  • Tier 1 indoor emissions.
  • Tier 2 for safety.

Evaluation methods

Water Boiling Test 4.2.3.

Other Information

Wisdom Stoves has another top lit up-draft gasification stove design called Malakai Jiko or MJ.

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