How to reduce humidity through mist eliminator

  • #1
farispksalmanul
4
0
TL;DR Summary
Hy. I was working on a project to reduce humidity levels through mist eliminators. I have a room 1 that intakes air and i spray coolled mist to the same room 1. At the end of the room there is a fan and mist eliminator. What i was thinking is when air temp outside is 45 degree and humidity is 85% percentage, to achive dew point we need to reduce only 4 degree celecious. To do this i pass cooled water to the foger (using chiller) room 1. Then i pass this air through mist eliminator to room 2.
20240116_075343.jpg
 
Engineering news on Phys.org
  • #2
Welcome to PF. :smile:

farispksalmanul said:
TL;DR Summary: Hy. I was working on a project to reduce humidity levels through mist eliminators. I have a room 1 that intakes air and i spray coolled mist to the same room 1. At the end of the room there is a fan and mist eliminator. What i was thinking is when air temp outside is 45 degree and humidity is 85% percentage, to achive dew point we need to reduce only 4 degree celecious.
Since you are introducing mist artificially and then extracting it, I assume this is a project for schoolwork? If so, I can more your thread to the schoolwork forums for you.

Also, you seriously have an interior temperature of 45C and exterior temperature of 4C? What kind of a hothouse is this?
 
  • #3
Why are you spraying mist into an airstream you want to dehumidify? It seems like you are doing the opposite of what you really want. And why isn't the answer just "air conditioner"? You seem to be leaving out a lot of important details. Please give a complete description of the application and known constraints.
 
  • #4
I want to implement this in a greenhouse for agriculture. Its not a project for schools. Outside temperature is 45 degree and relative humidity is 85%. Mist eliminator only collects water droplets not fog, or it canot collect water from a normal air. So i was planning to add moisture to make airstream to reach dew point and collect this water using mist eliminators.
 
  • #5
farispksalmanul said:
Outside temperature is 45 degree and relative humidity is 85%. Mist eliminator only collects water droplets not fog, or it canot collect water from a normal air. So i was planning to add moisture to make airstream to reach dew point and collect this water using mist eliminators.
This approach will increase the humidity past saturation and then collect the excess mist, leaving the air at 100% RH.
 
  • #6
Welcome! :cool:
Is the temperature in C or F?
How much air is being introduced and exhausted?
What interior conditions are desired?
Insulated building?
Solar load?
 
  • #7


For clarity i have uploaded a video to youtube. Please.
 
  • #8
Lnewqban said:
Welcome! :cool:
Is the temperature in C or F?
How much air is being introduced and exhausted?
What interior conditions are desired?
Insulated building?
Solar load?
Degree celcious
Interior condition is 75% to 85 % relative humidity and temp between 23-27 degree celcious
Building is made by (closed greenhouse) all side covered with poly sheets.
Solar load have no idea
How much air is supplied (no idea)
 
  • #9
You would get better results if you sent the cooled water from the chiller thru a heat exchanger, maybe something like a radiator from a car or truck.

Then a fan could blow air thru the heat exchanger, radiator, and you have cool air.

That is about how air conditioners work.
Cheers,
Tom
 
  • Like
Likes sophiecentaur and russ_watters
  • #10
Tom.G said:
You would get better results if you sent the cooled water from the chiller thru a heat exchanger, maybe something like a radiator from a car or truck.

Then a fan could blow air thru the heat exchanger, radiator, and you have cool air.

That is about how air conditioners work.
Cheers,
Tom
I agree. If he OP has a mechanism for producing cold droplets of air then it will involve a heat exchanger (/condenser / something) . At some stage, the water droplets will need to be collected and pumped away before they heat up and start to evaporate which could take you back to square one. So why not just condense the water directly from the air to the surface of the heat exchanger.

This thought experiment has been far from a waste of time, though because it's made us all think. :smile:
 

What is a mist eliminator and how does it help in reducing humidity?

A mist eliminator, also known as a demister, is a device used to remove liquid droplets from gas or vapor streams. It helps in reducing humidity by capturing and removing water droplets from air streams, thus decreasing the moisture content of the air. This process is commonly used in HVAC systems, industrial gas cleaning, and other applications where controlling moisture levels is crucial.

What are the different types of mist eliminators?

Mist eliminators come in various types, mainly categorized into mesh-type, vane-type, and fiber-bed mist eliminators. Mesh-type eliminators use layers of knitted wire mesh to capture droplets, vane-type eliminators use a series of corrugated plates to separate droplets from the air stream, and fiber-bed eliminators use thick layers of fibrous material to filter out fine mist particles.

How do I choose the right mist eliminator for my needs?

Choosing the right mist eliminator depends on several factors including the nature of the gas stream, droplet size, volume flow rate, and environmental conditions. For industrial applications, vane-type eliminators are often preferred for larger droplets and higher flow rates, while mesh-type are suitable for smaller droplets and lower flow rates. Consulting with a specialist or manufacturer can provide tailored advice based on specific requirements.

Can mist eliminators be used in residential settings?

Yes, mist eliminators can be used in residential settings, particularly in areas with high humidity levels or in homes using humidifiers. They are effective in preventing the buildup of excess moisture, which can lead to mold growth and other humidity-related issues. However, the scale and type of mist eliminator used in residential settings are generally smaller and less complex than those used in industrial applications.

What maintenance is required for mist eliminators?

Mist eliminators require regular maintenance to ensure efficiency and longevity. This typically includes cleaning the eliminators to remove any accumulated debris or droplets, checking for any damage or wear, and replacing components as necessary. The frequency of maintenance depends on the usage and environmental conditions, but generally, it is recommended to inspect them at least once a year.

Similar threads

How to Factor Vapor Retarders into Relative Humidity & thus Mold Risk
    • General Engineering
Replies
3
Views
1K
Temperature, humidity and gas sealed box
    • General Engineering
Replies
1
Views
2K
B Moist air - does it rise or drop?
    • Other Physics Topics
2
Replies
42
Views
5K
How much will my seaweed tanks heat up in the hot Indian summer?
    • General Engineering
Replies
9
Views
181
Relative Humidity and Temperature Changes when adding Heat
    • Introductory Physics Homework Help
Replies
11
Views
1K
I Calculate humidity raise/drop when opening a window
    • Other Physics Topics
Replies
2
Views
1K
I Relative humidity question (cooling the air in a room)
    • Thermodynamics
Replies
3
Views
790
How can I calculate relative humidity in helium?
    • Materials and Chemical Engineering
Replies
2
Views
2K
Arcing and conductivity and object interference
    • Electrical Engineering
Replies
4
Views
728
I Condensation as humidity control
    • Other Physics Topics
Replies
5
Views
3K

Hot Threads

Recent Insights

Back
Top