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MG Thermal Consulting

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MG Thermal Consulting last won the day on October 3

MG Thermal Consulting had the most liked content!

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About MG Thermal Consulting

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    Atlanta, GA
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    Refrigeration and process cooling industry.
    Civil War History.

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  1. Sounds great, your area seems to be really active (SC and Ga coasts). I have some clients in SC and they are really excited about their businesses!
  2. If you are going to use the water for the next mash run, then the chiller would need to have non-ferrous water passages (including pump), Easiest way is to meter water form city water source and match that to the still condenser usage. I would do this from a CWT (non-ferrous) pressurized so you don't have bacteria buildup.
  3. OZ, Using ice is a stop gap- cost of making ice (kw) is double that of making 55F water for cooling- a chiller is the way to go. Try a lease- monthly payment would pay for chiller in long run- a year or two.
  4. I'm over in Gwinnett Co. if you need to chat about any cooling issues and what you need on that end. Just shipped some equipment over in SC, one large, one medium size outfits, if you are taking road trips. Good luck to you!
  5. 85F city water- Do you live in AZ or Desert?
  6. Even better, a hybrid cooler- works like a drycooler in winter and an evaporative- adiabatic in summer. The hybrid controls when the chiller needs to be run. Really handy if you will be running still and mash cooling at once. Recent project uses a 40 T. hybrid cooler and 60 T. chiller for mash cooling instead of 120 HP chiller. Saving 40 HP of cooling for each run. Additional feature is a still chiller that reuses city water for next mash run.
  7. Good Luck to you! If you need any advice on your cooling system-especially energy saving equipment- let me know. I consulted with Ed Belfour on his distillery in Dallas about his cooling system and a few others as well.
  8. In states where there are many trout streams, you can't dump warm water such that it gets into streams, you have to chill it before discarding. I remember quoting chillers for such applications.
  9. I have just sold a system with a chiller having "NF" non-ferrous water passages to reclaim still hot water. With your type set-up you need some additional way to meter output and input from city water so that you can't run dry.
  10. Good luck to you. I supplied the cooling system to a chicago distiller that had a custom paint job done on his cooling tank- must be a UW fan!
  11. For just the mash cooling, near a 500 Gal. You should be near 65-70 tank temperature when done, so then let the chiller to continue running until the tank is around 55F, and then you're ready for still action! If you're cooling fermenters too, you want to upsize the reservoir so it finishes up a little cooler since you want decent temperature going to the fermenter jackets. I would tap off the return line back to the tank from the chiller so you have coldest water going to the fermenters and then return that back to the tank. I tend to use a hybrid cooler now (not a dry cooler, but similar) that gives you 85F glycol in summer and colder all other seasons. I use a chiller for the still and fermenters when I need to- this is my current high efficiency design. This design also allows smaller reservoir tanks and much less KW used for cooling during off season. I have a 40 ton hybrid cooler and 60 ton chiller used for a quick mash cool in a large distillery where they are mashing every day. They would have had to use 100 ton chiller if they did this with a large reservoir. I am saving 20 HP for the cooling in the summer and probably more like 40 HP in the winter season. Cost savings is immediate as well.
  12. The sizing of the reservoir depends on the mash cooling time plus the fermenter cooling as well, so if you had a 250 Gal mash load, a 500 Gal reservoir for that plus extraneous loads like fermenters. Recovery time should get done before you are ready to make a still run, so get the reservoir back down to around 50-55F before use again. If you are doing stripping runs, you'll have to upsize the chiller in some cases, especially if the tank starts to overheat- creeping above 70F before you're not close to the end of the strip run is not a good sign and you should adjust technique so you don't overheat the chiller. I am adding a 2-stage cooling technique for larger mash runs by adding a hybrid adiabatic glycol cooler which will give you performance of a cooling tower with a closed loop system, so I can run it along with the chiller to take the high heat out of the mash run which reduces the chiller size and overall KW. On a recently completed system, the savings winds up being 20 HP per hour of usage compared to cooling with a chiller. Hope to have pictures posted soon!
  13. For such a small chiller, if you can set it under a roof vent to take hot discharge air off it outside, you should be able to use it indoors unless it would be really close to any ethanol vapor- thats a no-no. The chiller should not suffer too much with glycol at the same temperature output, you may need a little more flow on the glycol to offset the friction loss and inherent loss from glycol thermo properties.
  14. For a 5 ton chiller, a brazed plate exchanger is about $900, new. Obviously there are a lot of used plate and frames out there, you just have to set flows.
  15. Hedge, More often than not, clients just fill the whole inside portion with water (treated) which simplifies it. The only reason glycol is added is to: 1) prevent winter free-ups, and 2) if you want to chill water below 45F, many manufacturers tell you to. Tapping off the glycol line allows you to lower the glycol temperature- handy for chill filtering- but you must valve the line off so the sub-freezing glycol doesn't pass through the heat exchanger (if you have one) and freeze the water in the water loop of the heat -x. You certainly can have the chiller set lower, again depending on whose you have, but you should be able to get to 40F by adding glycol and re-setting thermostat. "Raw" water is often used in critical situations as a backup, only, situation like at hospitals, but it needs to have a rugged filter to keep silt out of the loop which will inevitably end up inside the chiller evaporator. If you have a chiller that has a "coil inside a tank" design, this is not as critical because the water is outside of the tubing, settling in the tank.
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