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MG Thermal Consulting

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Everything posted by MG Thermal Consulting

  1. Converting Tote to Stripping Still

    Silk City, Are you saying you are using a glycol chiller @ -20F to condense the product?
  2. Converting Tote to Stripping Still

    Boiler feed only needs to be softened for the boiler to operate.
  3. Converting Tote to Stripping Still

    The company I represent has a boiler line that is "clean" non ferrous. You inject steam made from city water and the trickle that remains goes down the drain. what HP boiler would you need?
  4. Used dairy equipment

    You'd be better off putting a flow control on the chiller exit between it and the tank. One reason, you may damage the jacket itself- what is the rating in psi of the jacket. if it is only 15 psig, then you need to install a three way valve to bypass most of the glycol flow and a "flow setter" of you have multiple feeds off the process pump. How large is the chiller= tons of refrigeration or the flow? and the pump? Is your feed piping 2"?
  5. waste heat

    There are many ways, but this one is a no-brainer for Northern climates, pays for the aircooler in the first year - no refrigeration all winter!! In this setup, anything less than 30F is stored cooling to the reservoir, saving 10 HP of chiller run time all winter. I have a hybrid cooler that adds evaporative water to bring down ambient cooling, allowing running still, fermenters and mash cooler for all but a few months in summer.
  6. Electric Boiler

    Devil's in the details (like sizing HLT and trim cooler for excess heat)- a lot has to be known to accurately price out a complete system, but like you say, it's good to know what's out there for the future! In your example, it would seriously reduce boiler size ( I have those to supply as well). In your example, we can do this with current technology and swap out refrigerants when the new refrigerant is available- just in case someone doesn't want to wait:)
  7. Hello from Massachusetts!

    Well, he was smaller than the Dachshund when I picked him up, and now the Dachs can walk underneath him! Those needle teeth are a menace, too (my vet just laughed about that). He's a bit of a baby, tho- was scared at the sound of a bullfrog in the watergarden. Talk soon!
  8. Geothermal cooling

    3D has it right there. I've seen it where initial use was for geo piped grid, but when the distiller added on capacity, he needed to add the chiller anyway rather than the cost of much more pipe that could only get him near 55F- he ran out of field, too.
  9. Electric Boiler

    In a nutshell, I went to a meeting about a large heat recovery project which at present the refrigerant used will allow near 170F on the water side used for heating a building to replace a hot water boiler. The compressor manufacturer is now testing a refrigerant that will allow 190F water to be supplied. Testing is progressing to where the refrigerant will get the OK by next year to be used. The chiller used for this would look like a typical water cooled modular chiller, the chilled water side would be used for the distillery equipment cooling loop and the hot water side would be used for the hot water. In the case where heating water is not needed, we would use an additional outdoor aircooler to reject heat not needed. The chiller itself would be higher in HP but the efficiency of the refrigeration cycle is higher than either steam or direct electric heat, so initial cost would be greater for the heat recovery system, but overall consumption would be less and paybacks are usually calculated to be five years or less. The only way we can reclaim hot water off the chiller directly at present is to use a hot refrigerant to water plate exchanger, which can be used with todays chillers as an option. If you or anyone else is considering a design around heat recovery to seriously reduce the size of boiler or replacement to heat reclaim hot water, I can budget fairly closely with your distillery designer for a long term project or a heat recovery add-on to your present system. Contact me directly if you would like to be placed on a list for future notifications of heat recovery options.
  10. Greetings from Pittsburgh, PA

    JJ, i used to call on clients in Erie when I lived in BFLO, loved those snowy days heading downhill on I90 watching trucks slide off the hwy! If you need any additional cooling or add ons, give me a shout. Mike
  11. Electric Boiler

    Hedge, nicely put. I am hoping to create a path to less op cost for either by being able to heat water up to 190F (now max out at about 160F) with a heat recovery chiller.
  12. Distillery Consultant / trace ownership?

    LOL Bart, when I was studying aero-engrg in college, all we had was slide rules and the first hand calculator which seriously curbed my happy hour Fridays! I swear the Prof was a sadist in a past life. Good luck and if you need cooling equipment budgets, give me a shout- I can do the same (at will). Regards, Mike
  13. Electric Boiler

    Next year, I will have a chiller to make 190F water with a new refrigerant coming on board. Right now, I can offer a chiller with a tap to plumb to a heat exchanger/water heater. These are concepts to either replace or reduce the size of a boiler whether gas or electric.
  14. Greetings from Pittsburgh, PA

    Good luck to you Larry/Joe!
  15. 300 Gallon Fermenter - What size glycol chiller?

  16. 300 Gallon Fermenter - What size glycol chiller?

    Basically, most all systems require a water reservoir and not just a chiller. When using a reservoir, you can upsize the reservoir slightly to take care of the small loads (unless you're talking many, many fermenters). Once you add fermenter requirements to a city water situation, you're talking higher flows for 75F water usage because of the low transfer capability of jackets. Once you commit to a chiller system, the reservoir takes care of load when not running still or mash loads. You can usually come out ahead once you figure how much you're paying for water plus sewer versus purchasing a chiller- usually payback less than 3 yrs to purchase chiller. That being said, in warmer climates, it's a must to keep fermenters under control, especially where it gets above 95F outdoors and city water gets above 80F. In future (next yr maybe) heat recovery chillers will offer 180F hot water. New refrigerants being tested at present will allow this higher temp to be achieved. Attached is a special we built for one of Paul's clients, stripping rum with capability to operate at 25F for cold filtering and 50F for strip runs.
  17. Explosion proof requirements

    Heck, it could even be a propane tank from a forklift! I saw a building wall blown out from one. Ethanol fumes can be really dangerous if they can move to a small area and concentrate.
  18. Hello from Brookshire, TX

    Welcome, When to get to the cooling/heating systems, let me offer some proposals your way! Mike Gronski www.mgthermalconsultingco.com
  19. Cooling/Heating Chiller & heat recovery

    In the next year or so, 190F water will be available on heat recovery chillers on the larger StillChill chillers I offer. There are new refrigerants being offered specifically for this design, which for those needing hot water, this would be a new efficiency that can be designed and budgeted. I went to a meeting that a design was being planned for a commercial building planning for hot water heat using a chiller, and this was part of the discussion (I was there to talk to them about variable speed drive on compressors used on chillers). You almost double the size of the chiller, but the conversion back to "free" heat makes it worth the $$$. Mike Gronski, MG Thermal
  20. Cooling/Heating Chiller & heat recovery

    Jedd, We are a ways off before we can price out units, but right now you can count on the unit being about twice the HP as a conventional chiller- so if you were using 20 HP now, a 40 HP will be needed as a heat recovery chiller making 140 to 150F water. The new refrigerant will change that, making much hotter water. The system will need the hot and cold banks and other auxiliaries perhaps. Does this help?
  21. Cooling/Heating Chiller & heat recovery

    Really, the availability of the new refrigerants make the difference plus the compressor manufacturers have to test the refrigerants and so on until it comes available to the manufacturers and consumers. Also, it takes time for the manufacturers to determine a line of products and sales engineers and consultants time to put an overview and strategy to market. Fortunately for me, the manufacturer is already on the design end for a large convention center retrofit to eliminate steam heat nut needs 180F hot water to do that, which won't be done until next year. For distilleries, the chiller is actually a heat recovery chiller targeting the exiting hot water- so you get cold water that has to be used or saved in a cold bank or else hot water is not made. I hope that this becomes the future for distilleries as well giving owners a comprehensive plan for energy saving.
  22. Hello from Massachusetts!

    Welcome Jason! I'll be glad to help your need for cooling system budgeting, consulting or purchase. I'll be up your way in a couple weeks to pick up our new German shepherd puppy. Mike Gronski
  23. Geothermal cooling

    That's exactly right, ground temp is about 55F and you can run a chiller at 45F as well.
  24. Geothermal cooling

    Depends on the temp of the leaving condenser water and whether it;s connected to an open reservoir- in which case its treated and not usable directly and has to go through a htx suitable for potable water, so you lose a few degrees on the water temp. I have set up a larger chiller with a discharge refrigerant tap so that you connect it to a heat exchanger that way. The best way is to capture heat from the mash cooling. You can even put an in-line exchanger to the boiler feed line to heat up the city water to the boiler. Lots of things, but so little time.
  25. Geothermal cooling

    I have "wintercoolers" that make a cold glycol loop in the winter along with a small heat exchanger, you can make the water cold all winter, Works great for Northern climates where you can get 30F weather for the winter, eliminates using up juice in the winter for the chiller.