glycol refrigeration system..HELP!!

Replies to This Discussion

Permalink Reply by juddin E Garciso on May 2, 2009 at 2:55pm

the glycol refrigeration system

alam mo ba ang Trinoma mall (ayala mall)

katabi ng MRT

glycol system ang gamit nila

sa gabi guma gawa ng ICE at umaga tutunawin

gabi operation ng HVAC amaga AHU lang

Mag E-mail u dto sa kasamahan ko sa JEC

JEC din sya at sa Trinoma mall ang job site nya at glycol system gamit nila

carlosbravante@yahoo.com.ph

ano ang E-mail add u para send ko sayo ang Operation diagrams ng glycol system

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Permalink Reply by Ronel Lawag on May 2, 2009 at 10:19pm

glycol is liquid form of subtance try mung mg view ng glycol system in a youtube i hope & im sure makaka2lung sau un within 1 week dka na newbie you wil be GM

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Permalink Reply by igi sitier on May 6, 2009 at 8:16pm

eto ang email ko.. its hudas_ako11@yahoo.com
maraming salamat sa reply!

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Permalink Reply by LOUIE S.DUPAYA on May 8, 2009 at 8:49pm

actualy dre depende sa requirement na temperature ang ginagamitan ng glycol may kanya kanyang temperature range.sa aking mga kinommission mga unit depende sa temperature range.kapag ang temperature na kailangan 0 degrees culcius 60% ang tubig 40% ang glycol sa total volume ng tubig pagka mas mababa pa ang temperature na kailangan mo sa negative temperature 50% tubig50%glycol kailangan mo ng manual ng unit para i activate mo ung glycol program nya para mag function lahat ng controls.ang kailangan mo lang imonotor mo lagi ung glycol percentage para di ka mag freeze up kailangan mo ng actual data lagi kung ikaw ang nag maintainance.yan ang mga secreto sa glycol kc pag bumaba ang glycol mo mag freeze up kana agad kailangan bago mo paandarin ang chiller pump muna circulate mo ng 30 minutes saka mo kunin ung data kung tama parin.
louie dupaya

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Permalink Reply by Chillerman on May 10, 2009 at 1:42pm

ganda email add mo ah

igi sitier said:

eto ang email ko.. its hudas_ako11@yahoo.com
maraming salamat sa reply!

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Permalink Reply by juddin E Garciso on May 25, 2009 at 5:35pm

ICE THERMAL GLYCOL SYSTEM
Chiler
Premary pump
Ice cell
Heat exchanger
Sec pump
AHU

Chlled H20 system

ICE THERMAL
Chiler
Premary pump
Ice cell
Heat exchanger
Sec pump
AHU

Chlled H20 system

Glycol System on Trinoma mall use

Glycol Water Solution Furnace : Furnace with 50% glycol and 50% distilled water solution, which pass though tube and fin heat exchanges to distribute heat through furnance duct system

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Permalink Reply by juddin E Garciso on May 25, 2009 at 5:37pm

h

Attachments:

• ICE THERMAL GLYCOL SYSTEM judd-2.doc, 29 KB

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Permalink Reply by Chillerman on May 30, 2009 at 6:41pm

Hi Igi,

Imagine you are floating on the freezing Arctic sea....and you can see ice berg floating.

Those iceberg are frozen water right? Seawater wont freeze that fast its because of its high salt content. This is exactly the same way when they make blocks of ice on a bath of glycol water solution.

That is how glycol system works, we cool the water to certain degrees below zero and to prevent it from freezing we mix it with glycol solution, sometimes they call it brine solution...Just like Louie just mentioned technicians must be aware of the proper amount of mixture...if you put more glycol you can get a lower freezing point but it has limit that if you put too much it will just simply crystalize just like adding too much sugar on a cup of coffee it simply settles at the bottom and wont dissolve anymore.

Common usage of glycol are for ice making, can you see the brown thing at the bottom a blocked of ice? That is dirt, rust and yucks never ever make a halo halo or palamig from those they are intended for food handling and preservation.

In industrial application just like those in plastic moulding machines, engine block cooling and many more, they call it process cooling.

Juddin said they makes ice to cool the Trinoma Mall...actually they just cool the glycol and store that chilled glycol in a storage tank
so they have a supercooled chilled water the next day...they save power by simply recirculating that water for several minutes or hours without a chiller the next morning.

Have you invited your classmates to join us? Tell your instructor as well, perhaps they want to share some.

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Permalink Reply by Chillerman on May 30, 2009 at 6:46pm

Commonly used are Ethylene Glycol and Propylene Glycol, FYI.

Chillerman said:

Hi Igi,

Imagine you are floating on the freezing Arctic sea....and you can see ice berg floating.

Those iceberg are frozen water right? Seawater wont freeze that fast its because of its high salt content. This is exactly the same way when they make blocks of ice on a bath of glycol water solution.

That is how glycol system works, we cool the water to certain degrees below zero and to prevent it from freezing we mix it with glycol solution, sometimes they call it brine solution...Just like Louie just mentioned technicians must be aware of the proper amount of mixture...if you put more glycol you can get a lower freezing point but it has limit that if you put too much it will just simply crystalize just like adding too much sugar on a cup of coffee it simply settles at the bottom and wont dissolve anymore.

Common usage of glycol are for ice making, can you see the brown thing at the bottom a blocked of ice? That is dirt, rust and yucks never ever make a halo halo or palamig from those they are intended for food handling and preservation.

In industrial application just like those in plastic moulding machines, engine block cooling and many more, they call it process cooling.

Juddin said they makes ice to cool the Trinoma Mall...actually they just cool the glycol and store that chilled glycol in a storage tank
so they have a supercooled chilled water the next day...they save power by simply recirculating that water for several minutes or hours without a chiller the next morning.

Have you invited your classmates to join us? Tell your instructor as well, perhaps they want to share some.

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Permalink Reply by Chillerman on May 30, 2009 at 6:50pm

Usually when the application is close to zero degrees they used glycol to prevent any freeze-up in case the temperature overshoots or the machine fails to cut-off properly.

LOUIE S.DUPAYA said:

actualy dre depende sa requirement na temperature ang ginagamitan ng glycol may kanya kanyang temperature range.sa aking mga kinommission mga unit depende sa temperature range.kapag ang temperature na kailangan 0 degrees culcius 60% ang tubig 40% ang glycol sa total volume ng tubig pagka mas mababa pa ang temperature na kailangan mo sa negative temperature 50% tubig50%glycol kailangan mo ng manual ng unit para i activate mo ung glycol program nya para mag function lahat ng controls.ang kailangan mo lang imonotor mo lagi ung glycol percentage para di ka mag freeze up kailangan mo ng actual data lagi kung ikaw ang nag maintainance.yan ang mga secreto sa glycol kc pag bumaba ang glycol mo mag freeze up kana agad kailangan bago mo paandarin ang chiller pump muna circulate mo ng 30 minutes saka mo kunin ung data kung tama parin.
louie dupaya

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Permalink Reply by Julius C dabon on June 12, 2009 at 5:29pm

I will try to provide some, Its part of my research..

Learn Refrigeration and Air Conditioning Technology Online

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Permalink Reply by Sotes on June 15, 2009 at 8:38am

Two things on why glycol is used on chilled water system:

1. Low temperature applications, perhaps, below freezing point of water. As chillerman explained in this discussion, glycol does not freeze easily so it can continue flowing through chiller pipes even at very low temperatures.

2. To save electricity cost. Maybe not directly, but glycol could be used for thermal storage, as in the case of Trinoma per Juddin. The concept is to run the bigger equipments only on times when electricity cost is low (see Meralco TOU rates) which I think is around 9pm to 5am (need to verify). As much as possible, chillers are shut down during peak hours to avoid high electricity charges by Meralco. When needed, the cold glycol can be used to cool the facility even when the chillers are off. The savings may not be significant for smaller facilities, but for a huge mall, the savings could translate to millions of pesos per month.

Sorry if this is a bit off the technical side of the topic. My job is to "measure heat and the money that flows with it. " :-)

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