This page exists to help people involved in the development of GASIFICATION SYSTEMS as discussed on the Gasification email list. See list Archives. Select topic by Tab or Search. Current Topics are listed below.

Frank Shields Demonstrates the Gasifier Experimenter's Kit (GEK)

Frank Shields Demonstrates the Gasifier Experimenter's Kit (GEK)
Tom Miles, August 8, 2008

Frank with GEK at ETHOS Stove Camp 2008Frank with GEK at ETHOS Stove Camp 2008
GEK and BurnerGEK and Burner

Frank Shields demonstrated Jim Mason's Gasifier Experimenter's Kit (GEK) at the ETHOS 2008 Stoves Camp in Cottage Grove, Oregon, August 5-9, 2008. Frank gave the gasifier it's first trials at the Stoves Camp which is held annually at Aprovecho Research Center to train people in making improved cooking stoves for developing countries.(See Biomass Cooking Stoves http://www.bioenergylists.org)

See the kit at All Power Labs: http://allpowerlabs.org/gasification/gek/index.html

Jim has done a very nice job of designing and fabricating an Imbert style gasifier that can be used for learning about gasification. The gasifier is larger than it appears on Jim's website. It is built so that it can be easily loaded, adjusted , disassembled, poked, shaken, and all the things necessary to learn about how fuel moves in a downdraft gasifier. It has a removable hopper for extended running. It's a great way to get a number of people familiar with gasifiers. I think Frank was pleased as he tried different fuels - chunk wood, chips, almond shells, manure - and different firing rates. He was able to easily stop gasification, disassemble the gasifier and inspect the fuel, charcoal and reduction zones after each run. The gas burner was simple and ran with a clear and self sustaining flame.

This is a great tool for anyone wanting to explore downdraft gasification. Thanks to Frank for trying it out for everyone to see at Stoves Camp.

Tom

Wet Spring

Wet Spring
Rolf, Energies Naturales, July 15, 2008

Drowned bobcatDrowned bobcat

There was a lot of rain this spring!
Rolf

SinkingSinking
HouseHouse

Mobile chipper?

Mobile Chipper?
Darius, July 2008

Wood WasteWood Waste

Dear list members,

Does any one have an idea for how to cut the wood in the attached photos into smaller block or chips fast and efficiently?

Darius
darius_tamizi@hotmail.com
Wood Waste BlocksWood Waste Blocks

Wood BlocksWood Blocks

CEO, Sannerprojects Inc, High Efficiency Less Costly Turbines

Sannerprojects Inc is commercializing high efficiency turbines for renewable energy, energy efficiency and waste energy recovery. They are cheaper and more efficient than competitors. Sannerwind@gmail.com

Experimental investigations of long stick wood gasification in a bottom lit updraft fixed bed gasifier

Experimental investigations of long stick wood gasification in a bottom lit updraft fixed bed gasifier
A. A. Saravanakumar, Spray Engineering Devices Limited, Noida, Uttar Pradesh, India, July 17, 2008
Long Stick ReactorLong Stick Reactor

Based on the experience of the gasifier users on the efforts and energy for wood chip preparation in a typical gasifier, we have embarked on the development of a gasifier suitable to work with long stick woody biomass as the feed materials. In the context of the impact of gasifiers, as decentralized energy delivery devices such an approach, it is hoped, would be an attractive option in rural areas both in domestic and industrial sectors. In the present paper in the gasifier operation, there is a fixed quantity of char that is combusted to gasify a fixed amount of wood, and the gasifier does not operate in a steady state manner. In this present work, focus is made on the development of a gasifier using long sticks of wood as feed materials. With this concept, a 10 kW thermal output power gasifier is designed and constructed. The gas and airflows can be converted to the air/fuel ratio, the most important aspect of gasifier operation. The air/fuel ratio shows operation in a combustion mode at start up, a gasification mode for the middle part of the run and a charcoal gasification mode at the end of the run. Since the interest here is exploring and validating of this concept, a bottom lit updraft gasifier is designed mainly to look at the gas yield and other favourable factors and to use this gas so obtained for thermal applications. The rate of feed was between 9 and 10 kg/h and continuous operation for 5 h was made in a couple of runs to study the performance. In this paper we report the salient features of our efforts and results, yielding a gasifier efficiency of 73%.

This paper was published in Fuel Processing Technology
Volume 88, Issue 6, June 2007, Pages 617-622
See:
http://dx.doi.org/10.1016/j.fuproc.2007.02.003

Long SticksLong Sticks

FlamesFlames

Humphrey Pump at Chingford Pump House

Humphrey Pump at Chingford Pump House
GFWhell, July 6,2008
Humphrey PumpHumphrey Pump
My left hand is resting on the fuel line of the "largest and most efficient" 4 stroke heat engine in the world; there is no waste heat worth mentioning on the power stroke. This item was discussed at the engineering debates held on this very subject.

The explosion was somewhat quenched by the water, giving the addition of steam to help force the water down the play pipe. This principle was demonstrated with a "U" tube pump of similar design, .where the valves were dispensed with and an electric resistance element was suspended inside the top of one of the legs of the "U".
The column of water was made to come in contact with the red hot element, the resulting production of steam caused the column of water to oscillate like a pendulum, the stroke of which could be adjusted by the input of currant to the electric element.

Something like an external heat engine?

Humphrey's early experiments with an 8 inch diameter pump, where efficiencies were observed, included the weighing of the fuel which was "anthracite", of known calorific value, together with the amount of water pumped against a measured head.

These were the factors of the equations giving the efficiency. There is a theoretical amount of work available, trapped in a lb of coal. It will produce a known amount of gas.

These guys were not amateurs; they were not comparing this machine to a steam engine. They were in awe of the results; they did their best to shoot this one down. And failed.

I wish I could get another look at "The Proceedings of the Institute of Mechanical Engineers." 05-06 of the last century. I believe these documents are kept at the British Museum London.

I was shown around the Chingford Pump house by the chief engineer of the Thames Water Authority, to whom, I had written, expressing my enthusiasm for The Humphrey pumps. I got him to take my picture.

GF

See also:
Humphrey Pump at Chingford Pump House
David Fulford and others discuss Humphrey Pumps (2005)
Table LI Results of Humphrey Pump Tests "Table LI gives a summary of results of 30 pump tests made on five Humphrey pumps at Chingford," Handbook of mechanical and electrical cost data By Halbert Powers, Gillette, Richard, Turner Dana, Published 1918
". . .assumptions:. . .
Thermal efficiency of Humphrey pump (overall pumping h.p.) 20%. . .
Thermal efficiency of gas engine (brake h.p.) 24% + pump= 16%
Thermal efficiency of Diesel engine (brake h.p.) 32% + pump = 21%
Thermal efficiency of producer, lignite fuel, 75%. . .
Thermal efficiency of producer, wood fuel 65%. . .

List of the Papers of H.A. Humphrey, The National Archives, UK

King George V Pumping Station and Reservoir,Enfield
Doug Williams (2005) Humphrey pump in South Australia Riverland irrigation Area
River Murray in South Australia
Restoration of a Humphrey Pump to Full Operation
Humphrey Pump

Gasnet: Introduction to Gasification

Gasnet: Introduction to Gasification
http://www.gasnet.uk.net/files/115.pdf

Cow Manure Densification And Gasification- Converting Cow Manure Into Energy

AES in partnership with Renew Energy Systems has developed a range of proven technology solutions that allow ranchers and dairies to convert their manure into renewable energy. This video segment offers a glimpse into the developmental process that has led up to these cost saving programs. Not to be confused with Anaerobic Digestion, AES utilizes Vertically Integrated Gasification with Combustion to directly convert the manures into energy for heating, cooling and/or electricity. AES & RES demonstrate in this video how cow manure can be densified, aka "briquetted" in order to add fuel value and to reduce the difficulty of managing the manure.

Soymilk production with a TLUD (Top Lit Updraft Gasifier) Gasifier

Soymilk production with a TLUD (Top Lit Updraft Gasifier) Gasifier
Nikolaus Foidl, Desarollos Agricolas, Bolivia, May 13, 2008
Sieve Tank GasifierSieve Tank Gasifier
Photo1: right side the gasifier/ water boiler, center the water/ soymilk tank and left the rotating separation sieve.

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