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Thread: water cooler
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06-09-2006, 02:03 PM #1
water cooler
could u help to design this water cooler:
*Storage temp 10 c
*Inlet of water Temp 40 c
I want to know how to estimate the load (transmission & water) of 2 gallon of water
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06-09-2006, 02:24 PM #2
Re: water cooler
You need to give more parameter as both sides flow, temperature, load to design the chiller, and more info to estimate the load
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06-09-2006, 02:39 PM #3
Re: water cooler
In order to cool 2 US gallons of water (7.57 liters) or 2 UK gallons of water (9.09 liters) from 40°C to 10°C you need 1 Kcal/Kg approx
Case 1) 7.57 Kcal/°C or 30 BTU/°C
Case 2) 9.09 Kcal/°C or 36 BTU/°C
dt = 30°C then
Case 1) 227.1 Kcal or 900 BTU
Case 2) 272.7 Kcal or 1080 BTU
Note this is not cooling capacity: this is ENERGY
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11-09-2006, 04:37 PM #4
Re: water cooler
*The water cooler is for drinking.
*This tank will be a product tank or Per cooling tank and it will supply Another tank to be stored there.
*The comressor run time is 1/2 hour.
*Desine ambient temp is 46 C 115 F.
My questions are:
1-Will i calculate the transmission heat if it is insulated with fiberglass insulation .
2-How i will select the equipmentsLast edited by amaryta; 11-09-2006 at 04:39 PM.
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11-09-2006, 07:50 PM #5
Re: water cooler
First of all add the heat gain from ambient, considering your insulation.
Then you have to consider the hourly water consumption.
Then the desired chilling time must be considered as well.
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11-09-2006, 10:45 PM #6
Re: water cooler
Hi amaryta , first of all you must choose the thikness of the fiberglass , let say you want a heat transmission of X w/m^2 , you do the calculation and you will have a thikness , if the calculated thikness Y doesn't exist on the market you choose the closest and you do a reverse calculation to see what the new transmission is X' w/m^2 and so on you continue your calculation.
Remeber insulation will not draw the heat transmission to zero.
Respects and regards
BotrousLast edited by botrous; 11-09-2006 at 10:46 PM. Reason: Typing errors
Engineering, sciences, math, physics and my brain will generate "not responding " soon
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11-09-2006, 10:56 PM #7
Re: water cooler
could u help to design this water cooler:
*Storage temp 10 c
*Inlet of water Temp 40 c
I want to know how to estimate the load (transmission & water) of 2 gallon of water
Q=m * c * deltaT
m = mass of water to be cooled
c = thermal coefficient of water
deltaT = T_entry - T_exit
Q= the ammount of energy you need to substract from the water
then do the heat transmission of the tank (it depends of the time you want to store the water in at T=10C)
If you need accurate results you should also calculate the heat transmission over the pipes.
We need more details to give you details on how to calculate the compressor capacity. maybe a sketch drawing of your design will help.
Respects and regards
BotrousEngineering, sciences, math, physics and my brain will generate "not responding " soon