Air Filter Needed

A filter for the harsh salt environment is a tough one. The AC equipment is easier to order with marine grade materials than the filter. Why wouldn't the appliances be marine grade? Is this a custom installation?

The other filter is easier. A carbon filter I would recommend to get rid of the odors.

thanks

marine grade when possible will be used. on previous cruises, we had salt dust all over the place, it was a 58 footer motorsailer and a 48 footer motor twin deisel.

the air intake i was planning would come from the top of the twin masts, the further up, the less salt should be, same with water after a rain storm. at first i thought of using a cold fresh water wall that would catch particles and chill at the same time. the coldness of the water would be the result from the heat pump that would heat the hot water for showers, etc.

then the filter could be a water filter (maker) ... food for thoughts.

Well, the carbon filter is a given to control odors. What about a washable stainless filter for the salt water. May be you can contact a commercial kitchen vendor that carries stainless filters for the hoods. You may be able to find one tight enough to trap the salt. Maintenence is going to be the heartache though. Here is one that will work. http://www.airfilterusa.com/hvac-hms.htm

1. It might require a forced air system but something along the lines of a coalescing filter would do brilliantly.

2. Pack the boat out with silica gel packs to reduce suspended moisture in the air preferably close to the air inlet or close to the equipment you want to protect

3. Look at mist eliminators to get an idea of building a small scale system yourself. Look at either amistco or munters (don't know if they are really a bunch of munters) this would be okay for a small ship sized vessel. With salt spray everything would need frequent cleaning.

Dear,

You can refer to the following website, which would certainly help:

www.viledon-filter.com

Wish you best of luck

A filter will separate solids from a fluid. Filters cannot be used to separate gases from gases; in the case of wastewater smells the solution is to change the ventilation arrangements and/or introduce adsorbent materials.

If air is laden with water droplets then another method is needed to achieve separation. Is there scope for making the droplets coalesce, and then let gravity do the work? In the Himalayas, people are now collecting mist(!) for turning into drinking water by bringing the droplet-saturated air into contact with a fine mesh and collecting the drips.

If the air in a boat is to sealed from the outside then one needs to be careful about the buildup of the oxides of carbon, particularly the monoxide. Two separate boat owners locally have received intense hospital treatment in the last six months, involving spending time in decompression chambers, through making inadequate ventilation arrangements for on-board gas-powered refrigerators.

Condensation inside the boat will be another, less intense though more annoying, problem were the interior to be sealed.

yes, the heavy gases stay low, my new boat design will be taking care of that. a traditional boat is like a basement, i hate basements ... everything electric, no gas beside the portable gen and the dingy.

A filter will separate solids from a fluid. Filters cannot be used to separate gases from gases; in the case of wastewater smells the solution is to change the ventilation arrangements and/or introduce adsorbent materials.

http://www.airfilterusa.com/hvac-hms.htm Were you talking about this filter for the salt water air?

Carbon filters is what I recommended for odors.

"A filter will separate solids from a fluid. Filters cannot be used to separate gases from gases; in the case of wastewater smells the solution is to change the ventilation arrangements and/or introduce adsorbent materials."

The action is other than filtration, which is the removal of solids from a fluid, although in many cases the term "carbon filter" is the term used. Carbon works by adsorbing and acting as a catalyst for chemical reactions. Carbon is used in the water industry to remove organics (smells and tastes) and chlorine from water; organics are decomposed and chlorine is converted to chloride. Often a depth filter, often containing sand and other granular media, is used upstream of a carbon filter to remove particulates from a water stream and it is here, strictly, where "filtration" takes place.

Wastewater also contains hydrogen sulphide and ammonia, which vapourise readily to form pungent odours. Please describe in this forum the action of carbon on these gases.

_{"A filter will separate solids from a fluid. Filters cannot be used to separate gases from gases; in the case of wastewater smells the solution is to change the ventilation arrangements and/or introduce adsorbent materials."}

This is an activated carbon air filter used to stop septic odors.

http://www.surroundair.com/carbon-air-filter.htm

Indeed. It acts as an adsorbent and catalyst. Whether it is called a filter or not, it doesn't do filtration. It does adsorbence and catalysis.

A good recommendation.

The item does coalescence. There isn't a solid/fluid separation, so it doesn't do filtration, whether or not it is called a filter.

http://en.wikipedia.org/wiki/Filtration

Are you familiar with the latest urinals they use no water but allow the urine to go thru a liquid seal. The concept might be applicable to your needs.

yes, i am waying the pros and cons on that.

Previous answers point you in the right direction.

But any long term continuous solution will need a form of power supply (or lots of fresh carbon or desiccant). Avoid absorbent methods if you can.

Assuming you have got electric power to drive a fan and pump. You use a radiator (like a car with an electric fan) through which a pump passes cold sea water. The fan sucks warm sea air through the radiator (and filters). The action here is to cool the air to condense the moisture.The condensate is collected and returned to the sea along with any dissolved salt.

The air incoming air then passes through a coarse filter - (like open cell foam so that you can rinse it out when it clogs up) and then a fine filter like fibreglass (that you can wash or throw away) and then a micro-fibre coalescing filter (it looks like paper and has to be thrown away - and you cant wash it successfully) - and the filters must be vertical so that droplets run down the face of it to a sump to drain away to the sea.

You can add carbon filters for odour as a refinement.

The overall size of the unit will depend on how much 'fresh' air you need.

Good luck.

good ideas and good assumption.

the air flow i was studying was to be created by positive and negative pressures. ie thru ventilation. for power thru filters, i will need a fan with electrical power (batteries for stability) and i am designing a windmill that will pump water so that my electric propulsion motor can regenarate power (www.solomonindustries.com) with the water falling from my water tower hoisted on sail masts (imagine a wing mast filled with water, and pump air into it to create pressure (for water gen. and house water pressure). this will avoid the too much rpm problems of the windmill gen. .

the wind will be tunneled between my two mats and downed to roof level. (two masts cat see www.mediatis.com the hydraplaneur) this way i will accelerate the wind and ... you guessed it ease the windmill construction. this will also create induction possiblities for my ventilation ... filters ... at the same time it will allow me to raise a large traction kite from the center stern. the reason why the traction kite would raise from the stern is that when the wind drops below 3 km p h, i will power the boat to 5 knots and be able to store the kite at the stern, being at anchor, wind travels from bow to stern.

i haven t told you about the triple use of the bicycles, pump air&water, transportation and hoisting aboard. exercise is the bonus ...

there has to be multiple uses to everything aboard a cat, weight is the primary and safety concern. so far the industry only offers limited battery efficiency, but that is changing. AGM 12v batteries are probably the best compromise for now. there is plenty of energy (electrical) available around the sea, wind (windmill), wind sailing and regen., waves, water current, solar photovoltaic, solar radiation (parabolicas and panels), salt water (H fuel cell) , water geothermal, etc ... no i will not exploit the sea creatures for power ... i refuse to kill a whale for its oil ... i am sure there will be fast food oil everywhere we will go ...

I can see that mostly everybody is pointing toward the carbon filters. However, there are alot of applications such as off-shore turbines they use synthatic-fibre filters which is much cheaper in price.

I know that the carbon filters mainly used to remove smells from airl. In many cases, we use carbon filters in the food courts in shopping centers. It costs teriple the price of the synthatic-fibre filter.

I would appericate if anybody have a comparsion table between both synthatic-fiber and carbon filter.

You need to identify the cause of the smell.

A fibre type filter will only remove particles (liquid or solid) from the air. That will solve the problem if the particles are the source of the smell. For more details read up on aerosol science.

If any smell remains after removing the particles, or if the smell is in otherwise 'clean' air, it will be in a molecular form of a true gas or vapour. That will then need a carbon filter.

In any case it is a good idea to protect the carbon filter from 'overload' by using a fibre filter.

I was thinking that proper sanitary line venting would be a solution lol!

venting is the best ? solution when possible. at the local, very local, spec of things, venting may be acceptable. in the larger spec , venting is probably the worst solution for its own solitary solution. as allways, compromises will win.

you are probably wondering what the hec he is talking about. to make it a short overview of the problematic, lets assume you have 1 sceptic tank and you want to vent it, it will smell, but not too much; but if you have 1000 sceptic tanks and you want to lets say use the methane gas, simple venting is not enough, you will need a bunch of security measures so that you dont have an explosion due to a spark. Same with compost, at a home level, not a problem, but in this region, we have a larger problem ie the composting & sewage industrial facility has not found a smell (beside venting already used ... ) control solution. The neighborhood is complaining and one litterally needs to stop breathing driving by the facilities. (even with the rec. car vent.)

fire is one option being the possibility of cogeneration with a waste byproduct of industrial processes, which is what they are. Oil refineries use fire for various reasons, at the end of the day for controling the gases from the byproduct of their industrial processes.

the vietnamese use manure as fuel for cooking ... huge plastic bags, very safe ... unless a kid punctures them ...

at my level, my mandate is to control smells from gray waters sceptic process.

west marine sells additives for smell problems in boats. one of the worst smell problem is from salty environments, this is why filtering air is the first stage. unless i like to air condition or heat the outside ... killing the smells and killing the corrosive particles.

stage 1, remove large particles (clothing dryer machine), stage 2 remove the smaller particles (fine dust) , stage 3 remove corrosive particles (invisible) , stage 4 remove the smells and control potentially explosive build ups. stage 5 , recuperate the energy lost from removing the poluted air (thermowheel , etc) . achieve this and you got the best h/ac system in a house or a boat.

thank you for your time.

Contact Porex: www.porex.com.

This guy make filters sold in different shapes, in many types of plastics and pore diameters (ie: to sepparate fluids from air).

Good luck!

Cosme

thanks i wil check it out. on thing i found is that one can use for all electronics cpus etc, wet boxes, and put inside some kind of drying pad (to be preheated for prep. either with elect. or solar mini parabolica) , they last for many months. to cool the apparatuses, a cooling pad would likely do it. ie, the electronics are protected from salty envo. condensation is to be considered with the cooling pad in a humid hot weather; will the pads stand ? probably. i hear you can achieve 1200 deg f with sun light concentrator parabolica, that gets me thinking about water maker, steamer engine for elect. motoring, water heater, for all kind of needquickly uses, dangerous if untamed but interesting ... cheap to build too ! i can reverse it and it becomes a patio heater dish. collects water when it rains ...