Results 1 to 6 of 6
Thread: Process chiller calc
-
11-07-2007, 08:31 PM #1
Process chiller calc
HI I was asked by a work mate today how a friend of his could chill a manufacturing plant he runs (at the moment he runns water from the tap through the plant and to the drain!!). I have came up with an idear of a condensing unit cooling a tank and taking the water off the bottom and through the plant (obvious). My question is 'how do I calculate the size of condensing unit and evaporator I would require'?. I guess it would be water in temp, water out temp & flow rate but what equasion? Any advise would be great
-
12-07-2007, 04:30 AM #2
Re: Process chiller calc
You need to know the water flow rate and the temperature in and the temp out.
Then Q=M*Cp*(T1-T2)
For water, Cp (specific heat = 1.0)
M=water mass flow.
T=Temperature.
Ken
-
12-07-2007, 10:48 AM #3
-
12-07-2007, 08:00 PM #4
-
12-07-2007, 11:17 PM #5
Re: Process chiller calc
Per definition the SPECIFIC HEAT is the heat needed to rise or lower the temperature of a given mass ,
In metrics
1 [Kg] , 1 [Centigrade degree]. = 1 Calorie
Or in Imperial
1 Pound , 1 Farenheit degree = 1 BTU or Brithis therrmal unit.
As in this case we talk in metrics , the units are
Q = Calories
Cp = especific heat 1 Calorie , Kg degree
Mass = Kg = liter for water in practical
T2-T1 = degree diference or also Delta T , as Delta is the Greek letter used to mean diference between units.
1000 W = 860 Calories.
Normaly the equipmet are rated in W / Hour ,
One of the best way of having chilled water is by the use of a BRAZED PLATES HEAT EXCHANGER AS THE EVAPORATOR , but a any other mean could be used .
-
13-07-2007, 03:28 AM #6
Re: Process chiller calc
I work mostly in US units and have to drag the books out to convert to metric. I provided the basic formula, but you need to apply the appropriate units or conversions to suit your method.
The short cut for the US units ;;;
BTUH = 500*GPM*(T1-T2)
Ken
Similar Threads
-
Dunham Bush Chiller Alarm
By Regulator in forum Air ConditioningReplies: 11Last Post: 08-12-2010, 01:42 AM -
DIY aquarium chiller
By BarraCuda in forum Technical DiscussionsReplies: 18Last Post: 06-10-2010, 11:02 PM -
York Screw Chiller How low will it go?????
By bruceboldy in forum Industrial CompressorsReplies: 11Last Post: 10-08-2007, 10:29 PM -
Connecting Trane Water chiller to air handling unit
By celtictech in forum FundamentalsReplies: 10Last Post: 08-03-2007, 06:14 PM -
York process chiller repairs
By Matt in forum CommercialReplies: 5Last Post: 23-03-2004, 11:07 PM