Dear Paul,
please have a look at our web site www.samuchit.com
<http://www.samuchit.com/> which describes the cooking devices
being offered by us. One of our stoves called Sampada (which
means wealth) gasifier stove generates about 200g charcoal from 1
kg woody biomass. The villagers can earn money by selling the
charcoal to the village blacksmith. Woody biomass in the form of
stalks of cotton and pigeonpea, shells and leaf raches of
coconut, and woody pods of various trees are available to the
villagers free of cost. The name Sampada was chosen for this
stove because it generates money by burning woody fuel that is
available for free. Our Sarai cooker is also a very popular
cooking device. Using the combination of the Sampada stove (for
burning the woody biomass) and the Sarai (meaning celebration)
cooker for burning the charcoal, the entire meal for a family of
five can be cooked by using just 1kg woody biomass. This of
course does not leave any charcoal for the soil.
Yours
A.D.Karve
On Sat, Apr 20, 2013 at 6:03 AM, Paul Olivier
<[email protected] <mailto:[email protected]>> wrote:
Paul Means,
Rice hulls and rice straw are abundant in Asia, and in many
areas they are available for free or at very little cost. If
we were to go about designing a stove to exploit this
abundant biomass, should we design a stove that only produces
heat? Or should we design a stove that produces both heat and
biochar?
If it can be demonstrated that the biochar produced by this
stove greatly enhances the growth of vegetables such as
mustard greens, water spinach and Chinese cabbage, then the
by-product of cooking a meal acquires considerable value.
Every time someone cooks a meal with a stove that produces
biochar, this person would be earning money. It might not be
a lot of money relative to us, but believe me, it represents
a lot of money for the average Vietnamese, Cambodian or
Laotian. The average household in these three countries could
produce up to a kg of biochar per day which, already in this
area, has a value of about 30 cents US. If funding agencies
were to invest heavily in the kind of biochar research that
people such as Reg Preston and Simon Shackley have been
doing, then biochar would, no doubt, acquire an even greater
value.
One ton of rice hull pellets sells in Saigon for about $75
US. This one ton of pellets produces about 330 kgs of
biochar. This quantity of biochar has a value of about $100
US. A biochar merchant could give pellets to an urban
household at zero cost in exchange for all of the biochar
produced from these pellets. This means that the urban
household would have its fuel free-of-charge.
In the case of a rural household where undensified rice hulls
are abundant and often free, the household could earn enough
money through the sale of biochar to pay for the cook stove
within six months. In one year this household could earn
about $120 US, which in many cases here in Vietnam, is far
more than a monthly wage. If the cook stove is made out of
high quality stainless steel, then it would assure a steady
and important stream of income over many years.
So if we were to go about designing a stove to exploit the
enormous tonnages of biomass available in Asia, what should
we do? If we design a stove that only produces heat (with
biochar being burned), when this heat dissipates, there is
nothing of value that remains. But if we design a stove that
produces both heat and biochar, a by-product of considerable
value remains, and once incorporated into the soil, it
greatly enriches the soil and stays there for a very long time.
I would urge funding agencies such as the GACC to pour big
money into biochar research throughout the whole of Asia,
especially in those regions where rice hulls, rice straw and
other forms of agricultural biomass are abundant. They should
disseminate the results of this research to farmers so that
these farmers might understand the considerable value of
biochar when incorporated into the soil or fed to animals.
Biochar could easily be the driving force behind everything
related to the financially sustainable production and sale of
cook stoves in a given area.
Thanks.
Paul Olivier
On Sat, Apr 20, 2013 at 7:17 AM, Paul Means
<[email protected] <mailto:[email protected]>> wrote:
Hi Crispin,
In answer to your questions. I assumed that the cost of
transportation, for bulk products like this will
primarily be based on weight rather than volume.
Therefore, in my analysis, the relative costs for
transporting each of the different fuels is simply the
product of:
1. the relative energy density (MJ/KG)
multiplied by
2. the relative haul distance.(KM/MJ) to pick up a MJ of
fuel.
Sized & dried biomass (whether pellets, crumbled wood,
dried chips, sticks, etc) has only 59% of the energy
density of charcoal. On the other hand, the relative haul
distance for traditional charcoal, because the process is
so inefficient and it consequently has to be hauled from
a much wider area, is 3 times more than for sized & dried
biomass.
For the "alternative to charcoal" I assume that the
market for this fuel being brought into the cities is
developed on the basis of modern/new micro-gasifier /
TLUD type stoves. It's assumed that the char is either
burned in the TLUD (a few designs are coming out with
this now) or the char is burned in a separate stove. I
have assumed that this TLUD / Char Burning together has
an overall efficiency of 40%.
- Paul
Date: Thu, 18 Apr 2013 11:22:53 +0000
From: [email protected]
<mailto:[email protected]>
To: "Stoves" <[email protected]
<mailto:[email protected]>>
Subject: Re: [Stoves] Alternatives to charcoal -
transportation &
biochar
Message-ID:
<798760741-1366284175-cardhu_decombobulator_blackberry.rim.net-357301314-@b5.c10.bise6
<mailto:[email protected]>.blackberry>
Content-Type: text/plain
Dear Paul M
Could you please clarify two things (I can't see the
slides. I am in transit).
Are you basing the transport on a volume basis on the
assumption that a vehicle bearing a higher density fuel
can carry more? Someone was talking like that.
Next, I think you can (very) safely assume that any
charcoal stove will deliver 1.5 times as much heat per
available MJ into a pot. I aim higher than that but let's
stick to average mediocre wood and charcoal stoves. A
pretty ordinary charcoal stove will deliver 40% of the
energy available to the pot.
I don't know how that affects the outcome but it is the
reality re the processed v.s. unprocessed fuels (char vs
wood).
Thanks
Crispin
Sent from my BlackBerry device on the Rogers Wireless Network
--
Paul M. Means
Research & Testing Manager
Burn Design Lab
(253) 569-2976 (mobile)
http://www.burndesignlab.org/
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eternity, you must serve the times.”/ - /Dietrich Bonhoeffer
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