Entries by Kim Still

Setting Up a New Lab in Rwanda

Aprovecho’s General Manager Sam Benston recently returned from a trip to Rwanda, where he helped to set up a new ISO compliant cookstove lab. Here are some photos and information from Sam about his work there: I was installing the LEMS (Laboratory Emissions Monitoring System) and PEMS (Portable Emissions Monitoring System) and the rest of […]

Heat Exchangers for Heating Stoves

There are three types of heat exchangers generally used to capture the heat produced in a combustion chamber. The hot flue gases can: Heat mass, like heavy stone or masonry Heat water which then warms the house or… The easiest and least expensive route – make the hot stove gases efficiently heat the air inside […]

Flame and Flow Impressions

Dr. Larry Winiarski would remind me to imagine the languid rising of smoke from a cigarette when thinking about the velocity of natural draft gases in the Rocket stove.  I remember Larry saying that rising smoke is sexy, contemplative, and slow. Sam Bentson, General Manager of ARC, and Chenkai Wang, Division Business Manager of SSM, […]

Metering, Mixing, Temperature, and Time

The Mimi Moto forced draft TLUD achieves around 1-2mg/min PM2.5 at high power without an appreciable amount of residence time, as seen below. The jets of forced air create a downward flow of flame but there is only 7cm between the top of the fuel bed and the bottom of the pot when starting the […]

A Tier 5 Rocket Stove

The cast iron Jet-Flame sends 30 jets of pre-heated air up into the burning charcoal and wood in an open fire, sand/clay stove, or in a Rocket stove. It is patterned after industrial burners that position jets of primary air underneath the fuel bed to clean up combustion. Both Underfeed Stokers and Fluidized Bed Boilers […]