Recent content by mellotango

  1. M

    Venturi Ejector Air Flow Mechanics

    To be honest, I am not a qualified engineer but I am interested to conceptualize a energy recovery system for high pressure waste flue gas. And using a simple gas turbine technology. Diagram A would be common gas turbine systems in use where the combusted gas is directly forced onto the turbine...
  2. M

    Venturi Ejector Air Flow Mechanics

    Thanks for your answer. I am trying to see, if injecting the same amounting of compressed air energy to A and B, I would be able to obtain the same airflow power output in scenario B. For example, if the turbine generator displayed 100 Kwh output in A, what would the power output display in B...
  3. M

    Venturi Ejector Air Flow Mechanics

    Hi, I am trying to figure out the strength of the various type of airflow for my Venturi ejector device. Please refer to my diagram that illustrates scenario A or scenario B. The SAME amount of compressed air is injected for both scenario A and B. For simplicity, I have added to an electrical...
  4. M

    Suction force and pressure difference

    I am doing a study to see whether suction force can act as a mechanism to compress air. Let's say I have a normal syringe, which consist of the small cylindrical tip at the top of syringes where you attach the needle. Then there is the larger middle barrel for the liquid, medication, etc. Lastly...
  5. M

    Calculating compressed air expansion when heated

    Sorry, there is a 6 inch outlet for the hot gases to escape. I'm trying to model a biomass wood furnace, to feed it with highly compressed air, and through a special mechanism, the forced air will be able to drive 2 shafts. One shaft will power a screw compressor, which feeds the compressed air...
  6. M

    Calculating compressed air expansion when heated

    Can anyone help me with this calculation? I'm trying to figure out how much compressed air (generated from screw compressor) will expand by a ratio of what when fed into a wood furnace. 1) Wood Furnace Fuel Input: 30kg dry wood fuel/hr 2) Compressed Air Pressure: 8 bar 3) Compressed Air Flow...
  7. M

    Preservation of Sugar Feedstock for Bioethanol/Animal Feed

    Thx for the replies. I found this info... "One chemical concern when handling DOW FILMTEC elements is the preservative used with wet tested elements. The preservative solution in wet elements is either 1% sodium metabisulfite in water or 1% sodium metabisulfite and 2.4% citric acid in water."...
  8. M

    Preservation of Sugar Feedstock for Bioethanol/Animal Feed

    Hi Chemisttree, I'm still a little bit unclear as to the content of your useful reply, sorry for the confusion. So you mean to say that sodium benzoate won't work on its own to preserve the sap, but need to add citric acid to decrease that ph so that the sodium benzoate will be to get to work...
  9. M

    Preservation of Sugar Feedstock for Bioethanol/Animal Feed

    Hi, I've been doing some research on how to preserve sugar based feedstock such as sap, syrup, juice, etc to be used later for bioethanol production or animal feed. Sugar feedstock derived from sugar crops spoil very quickly due to presence of airborne yeast and bacteria. We have looked at...
  10. M

    Using ethelyne gas to convert starch to sugar

    That's interesting to know there are such amylase enzymes that work optimally close to room temperature. I'll definitely try to find out more about it. Usually both types of alpha and beta amylases are needed to break down starch to sugar. I'll see if there are both types that work around room...
  11. M

    Using ethelyne gas to convert starch to sugar

    Ok, so the key would be to add amylase instead of ethylene gas. I had thought about it but aware that amylase worked best at an optimal temperature of 60C thereabouts. Now if I didn't have the luxury of a 60C temp, but only room temperature amylase solution of 25C, would the starches be...
  12. M

    Using ethelyne gas to convert starch to sugar

    It is commonly known in the fruit industry that ethylene gas is widely used to boost a fruit's ripeness. i.e. fruits are harvested when they are still unripened, but prior to selling them on the market, they are exposed to a dose of ethylene gas, which are fruit's hormones to convert its...
  13. M

    Making hot air rise faster in flue gas funnel

    Hi, and thanks for your expert opinions in advance. I'm working on a theoretical scenario of a flue gas funnel. Assuming hot air is rising from a funnel at a constant rate. Would the hot air rise faster if water droplets were sprayed at the top of the funnel, hence lowering the air temperature...
  14. M

    Hydraulic motor driven by steam/compressed air

    Hi Q_Goest, I sent you a private message. Only realized they had this function in PF.. :-) thx
  15. M

    Can Hydraulic Cylinders Be Driven by Refrigerants or Steam?

    When I mention off-the-shelf components and small scale clean energy generation, what I mean is to use common industrial components with minimal modifications, be it air-over-hydraulic intensifiers, air/hydraulic motors, reverse flow centrifugal pumps, etc to generate rotary power to drive a...
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