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Desiccant Wheel Dehumidification

11/20/2017 9:51 AM

I'm am engineering student and currently doing a project based on dehumidifiers "desiccant wheel"

Q) Can any one please guide me about any material that would have a good efficiency regarding the dehumidification and their synthesis too.

Q) Secondly please mention/suggest any composite material and its synthesis that may provide a better and more efficient dehumidification process.

The main aim of my group Is to synthesize an efficient desiccant material , on the other hand we have already manufactured the initial design and structure of the desiccant based dehumidifier.

It would be of great help if I can get some knowledge about the materials and their synthesis from this forum.

  • Thank you.
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#1

Re: Desiccant Wheel Dehumidification

11/20/2017 10:03 AM

Silica Gel is probably the most common.

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#2

Re: Desiccant Wheel Dehumidification

11/20/2017 10:06 AM

Isn't the whole point of the project about discovering good <...material...>s, though, developing better ones, and applying them?

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#5
In reply to #2

Re: Desiccant Wheel Dehumidification

11/20/2017 12:19 PM

That's exactly what I am doing Sir

We're collecting info from many forums such as this one , and then we'll compare the info we get because we cannot import all the materials we desire due to limited funds. And also.because most of these materials aren't available local/domestic market

So your help/suggestions will be very helpful for us

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#3

Re: Desiccant Wheel Dehumidification

11/20/2017 10:45 AM

Yeah, what do we get if we give you the best answer, such as "Nylon".

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#4

Re: Desiccant Wheel Dehumidification

11/20/2017 11:47 AM

I wish you students would do some research WORK first and then come here... with a question like.

I did some research on and came up with (2) possibilities,

1.) 'this' and give the pros and cons

2.) 'that' and give pro's and cons

Anyone like to weigh in on this?

before you know it members will give you possibly a 3rd or 4th alternative with the reasons why.

Doing it that way, you show that you are willing to try.

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#6
In reply to #4

Re: Desiccant Wheel Dehumidification

11/20/2017 12:24 PM

We're collecting info from many forums such as this one , and then we'll compare the info we get because we cannot import all the materials we desire due to limited funds. And also.because most of these materials aren't available local/domestic market

We don't have the funds and the time for testing each every material hence we have to shortlists a few of them and then we'll have to import it as theory are not locally available here

As far as research is concerned we're doing the best we can I can assure you that but certain factors are not in our control such as limited funds and utility

So your help/suggestions will be very helpful for us

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#7
In reply to #6

Re: Desiccant Wheel Dehumidification

11/20/2017 12:36 PM

Anything you might learn here is on the internet, and freely available....in fact more....this makes your inquiry suspect of ulterior motives....are you phishing?

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#8
In reply to #6

Re: Desiccant Wheel Dehumidification

11/20/2017 12:39 PM

Took a few night course in college a few years back, and what I did to get a survey I used Survey Monkey.

Cheap, easy and one could post your 'survey' on here with a little more details.

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#9

Re: Desiccant Wheel Dehumidification

11/20/2017 3:10 PM

Because of the lack of information we can not give you good answer. As there are to many variables to consider. Like the temperature of the air you wish to dry, moisture content, volume, flow, desired dehumidification.

We can throw all kinds of materials at you and you still will have to do the research to choose the best one for the application. Which only you know. So do the research first if you have questions then get back to us.

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#10

Re: Desiccant Wheel Dehumidification

11/20/2017 3:34 PM

dessicant wheel dehumidifiers

Lithium salts (either the chloride or the bromide) undergo a phase change.

Silica gel does not require a phase change.

Another means of dehumidification relies on a spray tower for the moist air, where a concentrated lithium bromide is counter flow to the air. Of course, the lithium bromide weak solution requires heating to drive off the absorbed water.

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#11

Re: Desiccant Wheel Dehumidification

11/20/2017 3:47 PM
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#12
In reply to #11

Re: Desiccant Wheel Dehumidification

11/20/2017 3:53 PM

Nicely done!

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#13
In reply to #12

Re: Desiccant Wheel Dehumidification

11/20/2017 4:03 PM

Thanks.

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#14

Re: Desiccant Wheel Dehumidification

11/20/2017 5:36 PM

I would think that you could get a lot more information in less time than posting here. In any case, this has some good info:

https://www.trane.com/content/dam/Trane/Commercial/global/products-systems/education-training/engineers-newsletters/airside-design/admapn016en_0905.pdf

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#15

Re: Desiccant Wheel Dehumidification

11/20/2017 10:37 PM

As a follow on to #9⇑, the first step in most exercises of this type is to narrow down the choices best related to the process conditions, then worry about the feasibility of using a particular material. For example, dehumidifying a conditioned space in the desert is entirely different than one in a rain forest.

You do not need any money to purchase materials because: 1) the performance data will be available from the manufacturers and/or the web, and 2) Google does not charge for searches and/or delivery of the data.

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#16
In reply to #15

Re: Desiccant Wheel Dehumidification

11/21/2017 1:50 AM

similar to

different from OR

not the same as

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#17

Re: Desiccant Wheel Dehumidification

11/21/2017 2:21 PM

Back in another life, I was asked to make a presentation model of one of these for a major engineering firm. They were developing a version of it for a Southern gas company that was going to power it with natural gas. It had a desiccant wheel about 4 feet in diameter( it was supposed to cool and dry a single family home) and a foot thick. The wheel rotated through a gas flame which dried it, and then through an ambient air stream, which was cooled and dehumidified and then supposed to be vented into the home. Unfortunately they found that the wheel would be susceptible to runaway chemical reaction and catch fire, the day I visited the lab actually exploded! They never told anyone what they were using for a desiccant, but it must have had some kind of secondary heat release related to being dried.

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#18
In reply to #17

Re: Desiccant Wheel Dehumidification

11/21/2017 2:25 PM

Nitrocellulose?

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#19
In reply to #17

Re: Desiccant Wheel Dehumidification

11/21/2017 5:45 PM

NH4NO3?

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#20
In reply to #19

Re: Desiccant Wheel Dehumidification

11/22/2017 8:48 AM

Lead azide???

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