Previous in Forum: High Temp Limit on Concrete   Next in Forum: Material Certificate Issue Change from EN10204-2.2 to EN10204-2.1
Close
Close
Close
43 comments
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16

Which Dessicant is Best?

08/04/2011 10:30 PM

Which dessicant is best for removing humidity from air for home use, considering all factors, cost of material, toxicity, cost of maintenance, long term effectiveness, ease of cycling (driving moisture out) , etc? Silica Gel, Zeolite, Lithium Bromide, any one has real practical experience to share?

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Guru
United States - Member - New Member

Join Date: Mar 2010
Location: In the pool because it is too hot.
Posts: 3055
Good Answers: 140
#1

Re: Which dessicant is best?

08/04/2011 10:42 PM

air home use? in the room?

you'll need plenty of it, wheel barrows unless you have a super dry land climate there.

A less known, but superior is MOLSIV. But for in the house I personally wouldn't use any.

__________________
Plenty of room here
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#4
In reply to #1

Re: Which dessicant is best?

08/04/2011 11:05 PM

Thank you for your suggestion of MOLSIV, do you know the comparative between different dessicant?

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
United States - Member - New Member

Join Date: Mar 2010
Location: In the pool because it is too hot.
Posts: 3055
Good Answers: 140
#5
In reply to #4

Re: Which dessicant is best?

08/04/2011 11:42 PM

Do you have a closed cycle or open cycle in mind?

Molsiv is probably one of the most expensive: you need heat AND vacuum to get it to work. On the other hand, it comes in many varieties - balls and pellets and also with different structures. From 2 Angstrom to 20 and even more. Depending on the size it takes more than only moisture out of the air.

There are also many variations on the cited products. I have the impression that silicagel is still the most used product (cheap) and easy to regenerate.

In case of moisture in clean air also a long lifetime can be expected.

We have used active carbon mostly to adsorb solvents (easy to regenerate with steam). But it works also to fight diarrhea.

__________________
Plenty of room here
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20962
Good Answers: 780
#2

Re: Which dessicant is best?

08/04/2011 10:47 PM

How about a dehumidifier using a refrigeration/reheat process?

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#3
In reply to #2

Re: Which dessicant is best?

08/04/2011 11:04 PM

I was thinking about a more energy efficient humidity control system, i.e., using solar heat to dry the dessicant to 'refresh' it on repeated cycle.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
New Zealand - Member - Kiwi Popular Science - Weaponology - New Member Engineering Fields - Power Engineering - New Member Engineering Fields - Electrical Engineering - New Member

Join Date: Sep 2006
Location: Auckland, New Zealand
Posts: 8778
Good Answers: 376
#6
In reply to #3

Re: Which desiccant is best?

08/04/2011 11:43 PM

HRV (Heat Recovery Ventilation) systems do wonders and are much more energy efficient than a dehumidifier.

Explanation

HRV

Using desiccant is asking for trouble (especially in a high humidity country and in an environment like a building that is not a sealed environment where desiccant works best!). You would need quite a bit over a large area and even then the humidity reduction effect is going to be small.

Are you trying to get rid of mold in wardrobes or other enclosed spaces where a dehumidifier is impractical?

Jack - An HRV owner.

__________________
jack of all trades
Register to Reply Score 1 for Good Answer
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20962
Good Answers: 780
#7
In reply to #6

Re: Which desiccant is best?

08/04/2011 11:50 PM

GA. I have that in mind for a retirement cabin I'm contemplating.

In the right climate, Bravo88's idea of solar heat sounds promising for regenerating a desiccant; but not in my location.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Guru
United States - Member - New Member

Join Date: Mar 2010
Location: In the pool because it is too hot.
Posts: 3055
Good Answers: 140
#8
In reply to #7

Re: Which desiccant is best?

08/05/2011 12:06 AM

Check where to put up that cabin, because HRV is not universal too.

__________________
Plenty of room here
Register to Reply Off Topic (Score 5)
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#9
In reply to #6

Re: Which desiccant is best?

08/05/2011 12:13 AM

Not to get rid of mold, but for cooling.

In our climate, plenty of solar heat. My idea of keeping cooled without using compressor type air-conditioner is to keep humidity low. With good house insulation and sealing , a low humidity air and fan ventilation , it should provide good natural cooling.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
2
Guru
United States - Member - New Member

Join Date: Mar 2010
Location: In the pool because it is too hot.
Posts: 3055
Good Answers: 140
#10
In reply to #9

Re: Which desiccant is best?

08/05/2011 12:35 AM

To enhance your comfort zone: yes.

Moist air feels more "hot" than dry air of the same temperature. Where I live we have the same problem. I cheated a few months with exhausting the "hottest" air and have it replaced with cooler air. I use fans under the high ceilings and let "new air" enter along the "shade" side of the house. The hot air takes more moisture up to the exhaust.

Since air builds up in layers: you can also crawl on the belly to feel "cooler". Lots of ice cold beer helps also, especially when over-consumed.

All by all: this month I exhaust 4 gallon of demin water a day with a small 9000 Btu cooler. I feel good @28 degrees Celsius because my house has a better K value than a GE refrigerator. No way I can do this with desiccants unless I step in a power training program to move them in and out. Just need to find a buyer for my demin water, to pay my power bills now.

To save energy, you need to be strong or smart, or better both.

__________________
Plenty of room here
Register to Reply Good Answer (Score 2)
Power-User

Join Date: Dec 2005
Location: South Texas
Posts: 116
Good Answers: 3
#23
In reply to #3

Re: Which dessicant is best?

08/06/2011 8:08 PM

using solar heat to dry the dessicant to 'refresh' it on repeated cycle.

Why do you insist on wasting the water? Collecting the water dropped out as the humid air is chilled, and using that to irrigate container-grown vegetables in a window garden makes a lot more sense. Cut your food bill while you make yourself comfortable. I use dollars, not thermodynamic equations, to measure efficiency.

__________________
Just because it has a patent doesn't mean it is the best solution. Just because it has no patent doesn't mean it won't work. A patent is only a license to litigate.
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#26
In reply to #23

Re: Which dessicant is best?

08/06/2011 9:20 PM

The air is not chilled, chilling requires refrigeration mechanism, which use electricity. Sun energy is plentiful in my place.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Power-User

Join Date: Dec 2005
Location: South Texas
Posts: 116
Good Answers: 3
#29
In reply to #26

Re: Which dessicant is best?

08/06/2011 10:33 PM

The air is not chilled, chilling requires refrigeration mechanism, which use electricity. Sun energy is plentiful in my place.

That plentiful sun energy can make the electricity for Peltier effect cooling so you can collect the water for growing food, especially if you are in an area where the dew point is above 15 C. much of the time.

__________________
Just because it has a patent doesn't mean it is the best solution. Just because it has no patent doesn't mean it won't work. A patent is only a license to litigate.
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#31
In reply to #29

Re: Which dessicant is best?

08/07/2011 1:16 AM

A Peltier based generator that can generate enough power to run a refrigerant based humidity control system will be very funny , not to mention very expensive !

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20962
Good Answers: 780
#11

Re: Which dessicant is best?

08/05/2011 1:09 AM

Energy efficiency and monetary efficiency are not the same thing. Most solar processes are not very energy efficient, but occasionally they can be monetarily efficient--if the capital costs are not too high for recovering the "free" energy.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
2
Guru
Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#12

Re: Which desiccant is best?

08/05/2011 4:47 AM

I have real practical experience with Silica Gel, Activated Alumina and Molecular Sieves for removing humidity from air. Silica Gel or Activated Alumina is a better option due to lower cost. You need some fans or blowers to push moist air through the bottle filled with desiccant. As regeneration takes time, a dual bottle arrangement is better so that alternatively one can be put for regeneration. A part of dehumidified air (heated using solar energy) should pass through the bottle to be regenerated from direction opposite to normal flow (let out to atomosphere). You can also suitably design the bottle shape to use direct solar heat for regeneration with proper water separation arrangement.

Register to Reply Good Answer (Score 2)
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#16
In reply to #12

Re: Which desiccant is best?

08/05/2011 11:19 AM

My idea is more or less similar to yours. Thank you.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#13

Re: Which desiccant is best?

08/05/2011 4:51 AM

We use Lithium Bromide only as a refrigerant for a vapour absorption cycle. Its affinity for water is very high, but it is highly corrosive with water.

Register to Reply
Guru
Hobbies - Musician - Engineering Fields - Chemical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jan 2007
Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis)
Posts: 4216
Good Answers: 194
#14
In reply to #13

Re: Which desiccant is best?

08/05/2011 9:19 AM

We use Lithium Bromide only as a refrigerant

How is LiBr a refrigerant, since it has a melting point of 552ÂșC?

__________________
"Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20962
Good Answers: 780
#15
In reply to #14

Re: Which desiccant is best?

08/05/2011 9:57 AM

It's the water that is the refrigerant.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Guru
Hobbies - Musician - Engineering Fields - Chemical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jan 2007
Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis)
Posts: 4216
Good Answers: 194
#17
In reply to #15

Re: Which desiccant is best?

08/05/2011 12:21 PM

I know. Just trying to urge clarity in replies.

__________________
"Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
Register to Reply
2
Guru
Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#19
In reply to #14

Re: Which desiccant is best?

08/06/2011 12:02 AM

Mikerho, it was an oversight. thanks for pointing out. There are two popular vapor absorption refrigeration systems, Ammonia-Water and Water-LiBr. In first combination ammonia is refrigerant, but in case of second it is water.

Register to Reply Good Answer (Score 2)
Guru
Hobbies - Musician - Engineering Fields - Chemical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jan 2007
Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis)
Posts: 4216
Good Answers: 194
#20
In reply to #19

Re: Which desiccant is best?

08/06/2011 12:18 AM

Hi pritam,

Thanks for the info. The concept I see has been around for quite some time. RV refrigerators are a good example.

Now, if I am to understand it, I need to spend some time on research...

Thanks!

Mike

__________________
"Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#18
In reply to #13

Re: Which desiccant is best?

08/05/2011 3:35 PM

Lithium Bromide is not the refrigerant in absorption cooling system, but water.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Power-User
Engineering Fields - Systems Engineering - Member for some time now, see my profile.

Join Date: Aug 2007
Location: Essex, UK
Posts: 364
Good Answers: 3
#21

Re: Which Dessicant is Best?

08/06/2011 6:23 AM

Guys,

i am a potential buyer of dessicants, primrily for toolbox and similar uses.

I am trying to avoid tools going rusty or losing their edges.

I buy it in small quantities but without knowing which chemical I am buying!

I could do with a primer or two, but have always searched for Silica Gel, can I do better by widening the search? Any pointers will be useful,

Also refresh of said chemical is important, heating usually, I understand to drive the water out, colour change also useful to see whether the dessicant has passed its useful life etc

Thanks,

Sleepy

Register to Reply
2
Guru

Join Date: Jun 2009
Location: Bangalore, India
Posts: 725
Good Answers: 23
#22

Re: Which Dessicant is Best?

08/06/2011 9:29 AM

http://www.drierite.com/

__________________
bioramani
Register to Reply Good Answer (Score 2)
Power-User

Join Date: Dec 2005
Location: South Texas
Posts: 116
Good Answers: 3
#24
In reply to #22

Re: Which Dessicant is Best?

08/06/2011 8:21 PM

You get another GA from me. For a primarily closed container anhydrous CaSO4 can't be beat in my book, since it goes through a stepwise hydration all the way to CaSO4.7H2O.

__________________
Just because it has a patent doesn't mean it is the best solution. Just because it has no patent doesn't mean it won't work. A patent is only a license to litigate.
Register to Reply Score 1 for Good Answer
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#25
In reply to #24

Re: Which Dessicant is Best?

08/06/2011 9:17 PM

For a primarily closed container anhydrous CaSO4 can't be beat in my book, since it goes through a stepwise hydration all the way to CaSO4.7H2O.

Could you share your experience why this is so good that can't be beaten , strong absorption, ease of regeneration etc?

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Power-User

Join Date: Dec 2005
Location: South Texas
Posts: 116
Good Answers: 3
#27
In reply to #25

Re: Which Dessicant is Best?

08/06/2011 10:18 PM

Could you share your experience why this is so good that can't be beaten , strong absorption, ease of regeneration etc?

All of the Government, University, and private sector laboratories where I have worked, including the one I owned, used indicating drierite (CaSO4) as the dessicant of choice for dessicators or drying cabinets due to cost, drying capacity, absorption rate and time and ease of regeneration. We used CaCl2 solutions of known normality to hold an enclosed volume of gas at a known humidity for test purposes. Check CRC Handbook of Chemistry and Physics. The first hydrate formed is Gypsum, CaSO4.0.5H20, the last one is Plaster of Paris, CaSO4.7H2O.

__________________
Just because it has a patent doesn't mean it is the best solution. Just because it has no patent doesn't mean it won't work. A patent is only a license to litigate.
Register to Reply
Guru
Hobbies - Musician - Engineering Fields - Chemical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jan 2007
Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis)
Posts: 4216
Good Answers: 194
#28

Re: Which Dessicant is Best?

08/06/2011 10:19 PM

Where I work, we have a relative humidity (RH)-controlled oven. If the requirement is for RH below ambient, a dehumidification unit can be turned on.

This unit uses compressed air and has two columns. While one of the columns is removing water from the incoming air, the other goes through a moisture purge cycle. The regeneration of the desiccant is all in the switching of the airflow.

This is a small unit with a capacity of ~8ft3. I believe this type of system could be scaled-up to accommodate home volume requirements.

I don't remember the manufacturer, but I will get it and get back to you on Monday.

There are even some off-the-shelf systems out there:

http://www.forwardthinking.honeywell.com/products/dehumidification/dehumidification_products.html

No need to reinvent the wheel!

__________________
"Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#30
In reply to #28

Re: Which Dessicant is Best?

08/06/2011 11:51 PM

Good link, appreciate your info on Monday.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20962
Good Answers: 780
#32

Re: Which Dessicant is Best?

08/07/2011 1:34 AM

Under good insolation conditions, I suspect that ammonia/water absorption refrigeration would be more energy efficient than desiccant regeneration. Higher first cost, though. (This is only a guess, not up on best current technology.)

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#33
In reply to #32

Re: Which Dessicant is Best?

08/07/2011 2:06 AM

ammonia/water absorption system for home use will be crazy !

My thought is, desiccant based system is ideal for home cooling .

A low humidity environment, with fan blowing , the faster rate natural body perspiration will give good cooling effect. Using Solar heat regeneration is obvious choice.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20962
Good Answers: 780
#34
In reply to #33

Re: Which Dessicant is Best?

08/07/2011 2:24 AM

Even if a desiccant system were to take, say, twice as much/many solar collector(s)? Admittedly, I haven't yet run any numbers, but you don't even seem to be interested in doing so. And why is an ammonia/water system crazy?--it is quite commonplace in RVs.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#35
In reply to #34

Re: Which Dessicant is Best?

08/07/2011 4:21 AM

I am not thinking of a professionally made expensive RV system. The very purpose of my post here is to find a most cost effective way of cooling .

Anyway , I think ammonia for home use is not safe enough .

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20962
Good Answers: 780
#36
In reply to #35

Re: Which Dessicant is Best?

08/07/2011 4:46 AM

I don't know for sure, but am only suggesting that absorption system may be more cost effective than desiccant systems. (Or, it could go the other way.)

Just what do you think is unsafe about sealed ammonia/water absorption systems, whether for home or RV?

This seems to be a conceptual difficulty about rather simple stuff.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#37
In reply to #36

Re: Which Dessicant is Best?

08/07/2011 5:26 AM

It is conceptual difficulty of the monetary kind !

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru

Join Date: Jun 2009
Location: Bangalore, India
Posts: 725
Good Answers: 23
#38
In reply to #37

Re: Which Dessicant is Best?

08/07/2011 9:12 AM

You would probably have considered Indirect Evaporative Cooling:

http://jbarrownews.blogspot.com/2007/09/introduction-to-indirect-evaporative.html

__________________
bioramani
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#40
In reply to #38

Re: Which Dessicant is Best?

08/07/2011 11:58 AM

thanks for the link.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
Engineering Fields - Mechanical Engineering - Ever Changing United States - Member - From the Redwoods to the Valleys Engineering Fields - Control Engineering - Building blocks or writing code - to keep you comfortable

Join Date: Apr 2008
Location: 38th Parallel
Posts: 751
Good Answers: 19
#43
In reply to #36

Re: Which Dessicant is Best?

08/08/2011 5:39 PM

I think Tornado is on to it here.

A natural gas absorber for heating /cooling and dehumidification. Or focus a solar collector into the area that the flame/burn would occur and then you have free energy. Solar power to run the fan and pumps, batteries to store for off hours consumption.

I remember when Amana had the propane A/C units for heating and cooling. Packaged absorbers for the homes down to 5 tons. Very popular here in Tracy and Livermore...by the lab, out in California.

__________________
To be or not to be........ok that's a trick question.
Register to Reply
Guru
Canada - Member - Specialized in power electronics

Join Date: Feb 2008
Location: Montreal, Canada.
Posts: 1357
Good Answers: 80
#39

Re: Which Desiccant is Best?

08/07/2011 11:51 AM

I can imagine a pair of large panels with a surface thickly covered with silica gel or similar absorber.

These panel would be mounted vertically on a swivel post and separated with insulation. The assembly would be installed in an exterior wall "window hole" with a south/west orientation.

During the day, the inside panel absorb humidity while the outside half gets dried by the sun and lower dew point air. The insulation between the two panels would prevent heat from entering the house. At night, the exterior surface would be covered by some vapor barrier. During the night it would cool down.

In the morning, one would rotate the two walls and remove the vapor barrier on the interior side to repeat the cycle.

This whole process could be completely passive with only a five minute rotation every morning and a vapor barrier installation at night.

One could even have the panel permanently covered like solar panels and use fans to force the air through. Add a small motor, a timer and some sensors and it could be automated.

__________________
Experienced is earned, common sense is taught, both are rare essentials of life.
Register to Reply
Guru

Join Date: Dec 2010
Location: 1° North Singapore
Posts: 570
Good Answers: 16
#41
In reply to #39

Re: Which Desiccant is Best?

08/07/2011 12:03 PM

yes, similar idea.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!
Register to Reply
Guru
Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#42
In reply to #39

Re: Which Desiccant is Best?

08/08/2011 5:50 AM

I also suggested a similar idea at #12, it looks workable.

Register to Reply
Register to Reply 43 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Copy to Clipboard

Users who posted comments:

bioramani (2); bravo88 (14); dvmdsc (4); Ethanolics Unanimous (4); jack of all trades (1); marcot (1); Mikerho (4); pritam (4); Sleepy (1); Stedou73ish (1); Tornado (7)

Previous in Forum: High Temp Limit on Concrete   Next in Forum: Material Certificate Issue Change from EN10204-2.2 to EN10204-2.1

Advertisement