The Cookstoves Lab maintains a development and testing laboratory at Lawrence Berkeley National Lab in Berkeley, California, close to the UC Berkeley campus. At that location many different approaches are tried for making sure we are developing the very best, most fuel-efficient cookstoves. We then take those stoves out to the field where they are further tested before use.
Efficiency tests allow researchers to understand how much firewood the stoves can save under ideal lab conditions. We are also utilizing devices called Stove User Monitors and plan to mount these small, self-contained pieces of equipment on cookstoves to monitor and log stove temperature over several months of use. Theses devices, and others like them, are linked to researchers so they can monitor the use and learn from the data in real time.
Information collected is used to analyze the frequency of stove use, the burn time for each use and the rate at which cooks are feeding firewood into the stoves. Data also helps quantify the actual reduction of greenhouse gases resulting from the use of improved cookstoves.”
Gaseous emissions measurements instruments
CAI gaz analyzer series 700
The 700 NDIR analyzer is based on the infrared absorption characteristics of gases. The analyzer’s oxygen channel utilizes either the paramagnetic field or the electrochemical fuel-cell method to determine the percent level of oxygen contained in sample gaz.
CAI gaz analyzer series 600
The California Analytical Instruments’ Model 600 HFID Analyzer utilizes the principle of Flame Ionization Detection (FID) to determine the total hydrocarbons within a gaseous sample. The HFID analyzer has a heated oven (191o C) which contains a burner and an optional heated pump. The small flame of the burner is elevated and sustained by the regulated flows of air and either pure hydrogen or a 40/60 mixture of hydrogen and helium, or nitrogen. The split ring detector contains 2 electrodes. The two electrodes establish an electrostatic field. When a gaseous sample is introduced to the burner, it is ionized in the flame and the electrostatic field causes the charged particles (ions) to migrate to their respective electrodes. The migration creates a small current between the electrodes. This current is measured by the precision electrometer amplifier and is directly proportional to the hydrocarbon concentration of the sample.
Particulate matter emissions measurements instruments
Lancom 4 is a portable flue gas analysis device, it can measure up to eight gases simultaneously with nine separate sensors. Customisable to specific gas measurements and process stream conditions, a resilient stainless steel probe extracts the gas sample while real-time processing techniques produce the combustion and emissions calculations. All major flue gases are monitored, including oxygen, carbon monoxide, sulphur dioxide, nitrogen oxides (both NO and NO2), carbon dioxide, hydrogen sulphide, and hydrocarbons.
The DustTrak DRX handheld monitor is a multi-channel, battery-operated, data-logging, light-scattering laser photometer that gives you real-time aerosol mass readings. It uses a sheath air system that isolates the aerosol in the optics chamber to keep the optics clean for improved reliability and low maintenance. The DustTrak DRX handheld monitor measures aerosol contaminants such as dust, smoke, fumes and mists. You can simultaneously measure size-segregated mass fraction concentrations corresponding to PM1, PM2.5, respirable, PM10 and PM Total size fractions.
Fast Mobility Particle Sizer (FMPS) 3091
Monitor the size distribution of quickly-changing aerosols. Whether outdoors or indoors, some aerosol populations change too rapidly for standard aerosol size measurement techniques. The Fast Mobility Particle Sizer (FMPS) 3091 measures particles in the range from 5.6 to 560 nm with 1 Hz time resolution. This combination of two-decade size distribution and 1 Hz time resolution makes the FMPS a very valuable tool for monitoring particle exposures in rapidly changing environments. Suitable for measuring near street canyons, airports, or mines, as well as emissions from processes such as incineration, cigarettes, or printers.
Optical Particle Sizer (OPS) 3330
Light, portable, and accurate measurement of particles 0.3 to 10 micrometers. Capable of measuring both particle concentration and particle size distribution as frequently as once per second (1 Hz), the Optical Particle Sizer (OPS) is a valuable tool in numerous applications, ranging from filter testing to industrial measurements, as well as indoor monitoring. For outdoor monitoring, sometimes the OPS is placed in TSI’s weatherproof Environmental Enclosure.
The OPS uses single particle counting technology to measure particles from 0.3 to 10 µm in 16 user adjustable size channels. The measured particles can also be collected on a built-in filter for further analysis. The instrument is battery powered for up to 20 hours, and its large color touchscreen is easy to use.
AERODYNAMIC PARTICLE SIZER (APS)
The aerodynamic particle sizer (APS) is a particle size spectrometer that measures both the particle aerodynamic diameter based on particle time of flight and optical diameter based on scattered light intensity. The APS provides the number size distribution for particles with aerodynamic diameters from 0.5 to 20 micrometers and with optical diameters from 0.3 to 20 micrometers.
Ashok Gadgil, Group Leader, firstname.lastname@example.org
Vi Rapp, Deputy Group Leader, email@example.com