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MG Thermal Consulting

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Posts posted by MG Thermal Consulting

  1. The more efficient the heat exchanger, the more cooling you require, which is why I specify some kind of reservoir for everything except cooling with city water- but then this is so expensive, I specify a reservoir for that too, and for well water applications- hardly anyone has enough well capacity to run everything, too often the wells run dry. That way you can use a much smaller chiller.

  2. We are adding a product line to enable treatment of air/water in atmospheric closed tanks.

    If you are running a still with well water, this product can treat water in your tank and then with adding filter, take out any biologicals or minerals within the water.

    Likewise, it will keep your process water tank free from bacteria.

    It is a type of Ozone generator/pump, drawing less than 3 amps with a timer for shutting down if not needed.

    Please contact me for applications or pricing.

     

  3. 26 minutes ago, Marvin Gutierrez said:

    Hi MG Thermal Consulting,

    Please list your email so that I can also send you a private message regarding your cooling system consulting company. Thanks.

    Marvin G.

    Website and email is on member info. list.  mikegronski@gmail.com/ www.mgthermalconsultingco.com

     

  4. Once you get to the larger tanks, 5000 gal or so, horizontal steel tanks are generally the way to go, but I have seen indoor 5000 gal poly tanks.

    Seems to be more and more common to see multiple tanks, equalized or controlled with solenoids to toggle back and forth, especially if running multiple mash runs/day pr mash runs and stripping runs daily.

    Shipping a 2500 gal like one pictured to IL with 40 HP chiller located on the roof.  Tank is located below chiller with both process and circulating pumps. Pumps are run by subpanel at the pump/tanks station.

    If you can find a used dairy tank, I have clients that have used them successfully.

     

  5. On 9/16/2018 at 12:20 PM, JustAndy said:

    I would suggest diverting as much hot water as possible into an insulated tank to use for mash water and cleaning water rather than trying to chill it. And use a cooling tower or similar to drain off as much heat as possible overnight before putting it through a chiller.  

    Andy, 

    Even a hybrid air-glycol cooler cannot cool enough glycol to chill water to 50F in summer, and I have used them in Duluth, MN. A closed loop from a cooling tower means adding a water to water exchanger, indoor sump, pump, water makeup treatment and filtration.  First cost seems smaller, but by the time you run this system for a few years, you see water makeup and treatments costs add up and wonder why the additional water and sewer costs are so high.

    Diverting warm water must done with non-Ferrous piping, pumps, evaporator from the chiller, so for every concept, there is additional equipment added, or modifications to equipment that result in a higher cost.

    Each capacity of each piece of equipment has to match up, capacity wise, which is why shell/tube mash coolers are used for large mash tuns- to account for small amount heat transfer relative to the chiller+reservoir concept.  For given temperatures, the smallest capacity equipment will dictate time for cooling mash.  

    If the given equipment can't offer you enough assurance though experienced suppliers, then ask for references from satisfied customers.

    I can offer hot water from a heat recovery chiller to neat 170F, but in order to make the hot water, you need twice (roughly) the chiller HP to do that plus reim cooler to take out hot refrigerant when your hot water storage is maxed out.

    It all depends on what is more important, water heating, quick turnaround on cooling or smallest first cost.

     

     

  6. Welcome and if you need any help on you cooling system, give me a shout!

    I have some cooling systems installed over by Waterbury, CT and over in Lancaster, PA if you're taking a drive this Fall to see the trees go to wine tastings;)  

    Good Luck!

  7. Paul,

    That's the point I am, too, Paul.  If I sell a heat recovery chiller to make hot glycol, it's still needs some electric heater add for a hot glycol tank, and that buries my price.  I think the smaller distilleries should be able to work without a steam boiler, but it's a matter of making everything add together plus the cost payback on the utility that's the trick. Cheaper to buy gas for a boiler than the electricity input, especially if the customer doesn't have three phase power.

  8. I had a client use a couple stainless tanks for reservoirs, I supplied him the chiller with non-ferrous water passages.

    He would pump potable water from the tank, through the chiller , then to the mash exchanger and finally to Hot water tank for potable use.

    He would make up water to the cold tank, if he was in the hot water saving mode.

    I don't have photos as yet, but will get some sooner or later.

  9. ..and 60F is mighty cool unless that's the cooling water temp?

    Principle is the same, except load would be about half that, look at the picture, put one hand over your eye, look at the picture- wallla! a 5 Ton unit!

  10. The whole concept revolves around the cost of a closed loop cooling system vs. city water where it's used and discarded.

    In order to reach 60F product temperature , you need a minimum of 10 degree approach, even better with 20 degree.  The approach is the difference between the target temperature and the entering cooling water temperature.

    Of course, you can try to cool it part way with city water and then switch over to a closed loop system,  but you would need to not cross contaminate if you are using treated water or glycol in the chiller system.

    If you want this cooled in an hour, you're talking a 10 ton load.

     

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