[Gasification] questions for Tom Reed on stratified downdraft parameters

[Jeff Davis]

Dear Tom,

It's the heat that the IcyBall would absorb, in order to recharge it's
self. Like a heat absorbtion fridge. We can use the waste heat in the gas
outlet to power an absorbtion fridge system. Next the system can cool the
gas.



Jeff



> Dear Jeff:
>
> Not my field of expertise, but I doubt if any of the gases in producer
> gas would be absorbed in the icy ball cycle...  Just intuition.
>
> TOM REED
> ------------------------------------------------------------------------
>
> Jeff Davis wrote:
>> Dear Tom & All,
>>
>>
>>
>> I?ve considered using an automotive A/C unit to cool the gases just
>> before
>> the engine. I would think that this would remove a sizeable amount of
>> the
>> moisture from the gas.
>>
>> Now with the discovery of the IcyBall waste heat from the gasifier, and
>> or
>> engine, could possibly be employed to cool the gas. In a simple batch
>> mode
>> you would have two IcyBalls, one being recharged via the waste heat and
>> the second cooling the gas. Of course they would require manual
>> exchange.
>> Possible a re-circulating absorption cooler could be designed for this
>> task?
>>
>>
>> Jeff
>>
>>
>>
>>
>>
>> Tom wrote:
>>
>>> The efficiency and power of engines depends in part on the temperature
>>> of the intake mixture, and since we have gases, it would be tempting to
>>> have the lowest possible input temperature to the engine.  However, as
>>> you point out, paper filters and baghouses rapidly collect the fog and
>>> can generate too high a pressure drop.
>>> The easiest solution is to control your input air to 60 or 70C,
>>> depending on input fuel moisture and accept the small loss in power
>>> (make up with turbo charger?).
>>>
>>> Another solution could be to cool the gas to 10C (if you have a cold
>>> river nearby), drop out the fog, then reheat to 15 C to keep the
>>> filters
>>> dry.
>>>
>>> Good subject for discussion...
>>>
>>> TOM REED               BEF
>>> ------------------------------------------------------------------------
>>>
>>> Jeff Davis wrote:
>>>
>>>> Jim wrote:
>>>>
>>>>
>>>>> 6. filters:
>>>>> i am finding dry filters for secondary particulate filtering to not
>>>>> stay
>>>>> very dry, and generally become rather useless very quickly.  or
>>>>> rather,
>>>>> they get wet and then require huge vacuum to pull through them.  i am
>>>>> using
>>>>> shop vac paper/synthetic filters.  i am using them after a giant
>>>>> cooler/radiator and the gas going into the filter is very cool.  i
>>>>> think
>>>>> about 80-90deg.  i realize i could reheat partially before the filter
>>>>> to
>>>>> prevent this problem, but such isn't very attractive.  so from the
>>>>> experience of others out there, are dry "paper" filters generally
>>>>> unreasonable on gasifiers for condensate reasons?  do dry filters
>>>>> usually
>>>>> end up as some sort of sawdust, coffee or other granular filter
>>>>> media?
>>>>> are
>>>>> others finding the "wisdom" of wet filters after the failure of dry
>>>>> ones?
>>>>>
>>>>>
>>>> Dear Jim,
>>>>
>>>>
>>>> Yes, dew point is a big issue with dry filters.
>>>>
>>>> You might want to give composted horse dung a try.
>>>>
>>>> Better yet, moss. It keeps it's spongyness well.
>>>>
>>>>
>>>>
>>>> Jeff
>>>>
>>
>>
>>
>>
>


-- 
Jeff Davis

Some where 20 miles south of Lake Erie, USA