Pemberton-Pigott

Vesto +_ Switchgrass Pellets
Crispin Pemberton-Pigott, New Dawn Engineering, Roger Samson, REAP Canada, January 5,2008

Densified Canadian switchgrass pellets were burned in a VESTO (New Dawn Engineering) stove in the gasification mode.

Dear Grass Burners

Roger Samson was here today with Stephanie and he brought along a Mayon Turbo stove with rice husks and a big bag of switchgrass pellets.

We tried this 'fuel of the future' in the Vesto which first required putting a small sheet of newspaper at the bottom to keep the little pellets in, and second perforating the sheet to let in a least a small amount of primary air.

It was packed pretty tightly. The pellets are about 15 MJ per litre.

We lit it on top with a small wood fire and it got going nicely. It burned very much like a Vesto with the 'gasifier mode' engaged meaning that it ran with very little primary air getting through and a floating bed of flame perhaps 7 cm above the fuel. Very pretty.

The CO/CO2 ratio was stable at 2% and had no odour or visible smoke. I will get some picture posted and a movie with a description by Roger.

The flamefront was shallow, as Alex describes with wood pellets. Nothing really to add - it burned completely and gave off lots of heat.

Regards
Crispin

Dry Fuel Equivalent Calculator
Crispin and Nigel Pemberton-Pigott, October 2007

Heat Content of Ethanol Gel
Crispin Pemberton-Pigott, August 26, 2007
Dear Friends

Boiling Point 53: Technologies that really work - May 2007
Liz Bates, HEDON, July 2007

Overview
The theme of this edition is "Technologies that really work" and we are pleased to welcome Crispin Pemberton-Pigott as theme editor. Crispin is well known to many Boiling Point readers and has worked in the field of stoves for over 25 years. His editorial discusses changes that have happened within the household energy sector over the years and looks at what the future challenges could be.

This edition covers a range of energy technologies and looks at what has made them successful and used by people in Africa, Asia and Latin America. There is also a discussion around the issues needed to make a technology successful including the social, economic, marketing, environmental and political factors.

Maputo Ceramic Stove Update
Crispin Pemberton Pigott, New Dawn Engineering, Swaziland, June 6, 2007
MCS

Interesting story from Malawi on the use of institutional Rocket Stoves
Crispin Pemberton-Pigott, New Dawn Engineering, May 31, 2007

120 L Pots Nkolokoti

Jigger Mould Making for the Maputo Ceramic Stove
Crispin Pemberton Pigott, New Dawn Engineering, March 7 2007
Finished, cured moulds
This is a set of pictures to show the process for making the moulds. The results are quite impressive - smooth and hard, beautifully formed. We can make about 10 or more moulds per day using the Jigger mould holder as a form.

Method for Manufacturing Moulds for the Maputo Ceramic Stove
Crispin Pemberton-Pigott, New DawnEngineering/ProBEC, February 18, 2007

Inner Form

This method is used to make the master mould, from which other sets of outer moulds can be made to create additional moulds at a high rate.

ETHOS Conference Proceedings, Jan 26-28. 2007
Kirkland, Washington

Session 1: Emerging Technologies & Fuels

Ndirande Nkhuni Biomass Briquette Programme, Malawi
Malla Mabona, UNDP, 2001 (Discussed 10/2006)