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System for condensing steam in a low pressure system

  1. Aug 20, 2011 #1
    Hello,I'm attempting to come up with the best method to achieve maximum condensation (air dryness).

    In the system an exhaust fan will draw in steam (212F) and pass it through a 90 degree pipe (~12-14 inches) before it enters an area where it needs to be cooled for the purpose of removing the maximum amount of humidity.

    The steam produced in an hour equals:
    337.7 cubic feet
    14,495 BTU,
    4.24 KWh

    The purpose of condensing the vapor back into liquid is to protect the down-stream activated charcoal filter from degradation due to high humidity.The questions I'm having difficulty answering are as follows:

    1) How to match the cooling/dehumidifying efficiency of a system with the optimum amount of air flow (ie choosing the right fan for the right amount of airflow for the system to be the most efficient)

    Example: If I am passing 500 cubit feet of air through the system per hour and I want to achieve a certain % humidity where do I go from here?I've attached the concept drawingThanks in advance for your replies
     

    Attached Files:

  2. jcsd
  3. Aug 20, 2011 #2

    russ_watters

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    I'm not clear on how you are removing the heat - and what are the inlet air conditions for mixing with the steam?
     
  4. Aug 24, 2011 #3
    Need some help generating ideas to accomplish an intended outcome

    Hello,

    I posted before and didn't get much response. I realized the post was not well composed and presented a problem that was not well defined. I've dumbed down some of the details here so while this may sound rediculous the application will be somewhat different. It's a thought problem.

    Concept: Build a device that effectively eliminates a nasty smell due to organic compounds aerosolized with steam from an open pot of boiling water.

    Assumptions: Boiling takes place inside on the kitchen stove. Due to the desired chemical reactions you cannot place a lid on the boiling containter of liquid or otherwise put it under abnormal pressure.

    Idea 1: My first thought was to take a fan and mount it several inches above the vessel of boiling liquid. In-line with the fan would be an activated charcoal filter which would work in capturing the organic compounds that create the smell
    Problem 1: Activated carbon is a dessicant and will absorb the water thereby reducing its effective life​
    Solution 1: Dry the air before passing it through the charcoal filter​
    Problem 2: In a low pressure environment many air dryers are not effective. Based on previous feedback this approach is rife with additional problems​

    It would seem like an easy problem to solve but I'm at a standstill. Retrofitting the range hood exhaust system would be an option, however the idea is to make something portable that I could use in a kitchen or in a garage, for example.

    The system would be used in intervals of around 1 hour.
    The steam produced in an hour equals:
    337.7 cubic feet
    14,495 BTU,
    4.24 KWh


    Any ideas are greatly appreciated.
     
  5. Aug 25, 2011 #4

    SteamKing

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    Homework Helper

    It's probably not a good idea to be making chemical reactions on your kitchen stove in the first place.
     
  6. Aug 25, 2011 #5
    Haha. Well thanks for that nugget of wisdom SteamKing. Chemical reactions take place in kitchens all the time. It's called "cooking".

    As I stated before, the application of this is different than it probably appears. This is a thought problem.

    I've looked at as many different types of filtration systems as I can find and nothing I've found would seem to work.
     
  7. Aug 25, 2011 #6

    SteamKing

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    Staff Emeritus
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    I've done my share of cooking, Chex, and I recognize that the food is altered by the process. But I've never needed a gizmo like you describe over my stove. I think you are trying to react something on your stove which is nastier than cooking onions and peppers with tender cuts of beef.
     
  8. Aug 26, 2011 #7
    So you're concerned about the application or do you just not have anything helpful to add and therefore choose ad hominem style attacks?
     
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