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.
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  • #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
 
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  • #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:
 

FAQ: How to reduce humidity through mist eliminator

What is a mist eliminator and how does it work to reduce humidity?

A mist eliminator is a device used to remove liquid droplets from gas streams. It works by capturing the droplets as the gas passes through a series of baffles, mesh pads, or other filtering media. The liquid droplets coalesce on the surfaces of the eliminator and then drain away, effectively reducing the humidity of the gas stream.

What are the different types of mist eliminators available?

There are several types of mist eliminators, including mesh pad mist eliminators, vane-type mist eliminators, and fiber bed mist eliminators. Each type has its own advantages and is suitable for different applications. Mesh pad mist eliminators are commonly used for their high efficiency and low pressure drop, while vane-type mist eliminators are preferred for handling large volumes of gas with minimal maintenance.

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

Choosing the right mist eliminator depends on several factors, including the gas flow rate, the size and type of liquid droplets, the desired efficiency, and the operating conditions (such as temperature and pressure). Consulting with a supplier or engineer who specializes in mist eliminators can help you select the most suitable type for your specific needs.

What maintenance is required for a mist eliminator?

Regular maintenance is essential to ensure the optimal performance of a mist eliminator. This typically includes inspecting the eliminator for any signs of damage or clogging, cleaning the filtering media to remove accumulated liquids and particulates, and replacing any worn or damaged components. The frequency of maintenance depends on the operating conditions and the type of mist eliminator used.

Can mist eliminators be used in all industrial applications?

Mist eliminators are versatile and can be used in a wide range of industrial applications, including chemical processing, oil and gas production, power generation, and air pollution control. However, their suitability depends on the specific requirements of the application, such as the types of gases and liquids involved, the operating conditions, and the desired level of humidity reduction.

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