How is cooling tower capacity calculated?
Measuring the capacity of a cooling tower comes down to a math formula: the product of the rate at which the water flows, specific heat and the temperature difference required, represented as 500 x q x dt/12,000.
How do you calculate the effectiveness of a cooling tower?
iii) Cooling tower effectiveness (in percentage) is the ratio of range, to the ideal range, i.e., difference between cooling water inlet temperature and ambient wet bulb temperature, or in other words it is = Range / (Range + Approach).
How do you calculate the flow rate of a cooling tower?
Heat Load (BTU/Hr) = GPM X 500 X ° Range of cooling, or rearranged to determine the design flow rate. GPM = Heat Load (BTU/Hr) = 6,250,000 Btu/Hr = 835 gpm 500 X ° Range of cooling 500 x 15° R Now you can make your cooling tower selection based on 835 gpm, cooling from 98°F to 83°F @ a design 76°F Twb.
What is COC in cooling tower formula?
What is COC meaning? COC or the Cycles Of Concentration is an abbreviation, used when talking about cooling water or cooling tower water. The COC specifies, how often a fresh water added into the loop, can be used or pumped around, before the water has to blown down or bleed off from the cooling tower.
How do you calculate the rate of cooling?
Calculate the cooling rate by dividing each temperature data point by its corresponding time data point then average all of your answers to achieve a cooling rate. In other words, the change in the temperature divided by the change in time will give you an average temperature rate change.
What is TR capacity in cooling towers?
Some commercial and industrial refrigeration systems are rated in Tons of Refrigeration (TR, tons). A ton is the amount of heat removed by an air conditioning system that would melt 1 ton (2000 lbs.) of ice in 24 hours.
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Converting between Btu/h and Tons of Refrigeration.
| Btu/h | Refrigeration Ton | kW |
|---|---|---|
| 60000 | 5 | 17.6 |
What is TR for cooling tower?
A ton of refrigeration (TR) is a unit of heat extraction capacity of the refrigeration or cooling equipment. Generally, TR is defined as the amount of heat transferred to freeze or melt 1 short ton of ice at 0 deg. C in 24 hours. 1 TR is approximately equal to 12000 BTU or 3024 Kcal/hr of energy/heat load.
What is the formula for determining cooling tower cycles of concentration?
Recall again, cooling tower makeup water = evaporation loss + drift loss + blowdown.
How do you calculate CHW flow rate?
Chilled Water Systems
- Total Heat Removed. The total heat removed by an air condition chilled-water system can be calculated. h = 500 q dt (1) where.
- Evaporator Flow Rate. The evaporator water flow rate can be calculated. qe = htons 24 / dt (2) where.
- Condenser Flow Rate. The condenser water flow rate: qc = htons 30 / dt (3)
What is COP of cooling tower?
COP is the ratio of the refrigeration effect produced by the chiller against the amount of electrical energy that went into the machine to produce this[5]. More efficient systems have a higher COP.
How is water cooling calculated?
Subtract the water’s temperature as it leaves the chiller, measured in degrees Fahrenheit, from its temperature on entering it. For example, if water enters the chiller at 40 degrees Fahrenheit and leaves at 66 degrees Fahrenheit: 66 – 40 = 26 degrees.
What formula is Q MC ∆ T?
The amount of heat gained or lost by a sample (q) can be calculated using the equation q = mcΔT, where m is the mass of the sample, c is the specific heat, and ΔT is the temperature change.
How many kW is 1 ton?
3.52 kW
Ton To kW Chart
| Tonnage: | kW (kilowatts): |
|---|---|
| 0.75 Tons | 2.64 kW |
| 1 Ton | 3.52 kW |
| 1.25 Tons | 4.40 kW |
| 1.5 Tons | 5.28 kW |
What is the formula for CoP?
CoP = power output / power input. The higher the number, the more efficient the system.
How do you convert TR to CFM?
However, it is not a constant and varies with different manufacturers. CFM is cubic feet per minute. TR is tonnage of refrigeration. For the non-centralized conditioning system, 1 TR =300CFM.
How many kW is a ton?
3.5169 kW
1 Ton = 3.5169 kW
That means that 1 ton of refrigeration is equal to 3.52 kilowatts.
What is LG ratio in cooling tower?
The L/G ratio of a cooling tower is the ratio between the water and the air mass flow rates. Cooling towers have certain design values, but seasonal variations require adjustment and tuning of water and air flow rates to get the best cooling tower effectiveness.
How do you calculate kW and RT?
Electric motor driven chillers are rated in kilowatts per ton cooling.
- kW/ton = 12 / EER.
- kW/ton = 12 / (COP x 3.412)
- COP = EER / 3.412.
- COP = 12 / (kW/ton) / 3.412.
- EER = 12 / (kW/ton)
- EER = COP x 3.412.
How do I calculate GPM?
The formula to find GPM is 60 divided by the seconds it takes to fill a one-gallon container (60 / seconds = GPM). Example: The one-gallon container fills in 5 seconds, breakdown: 60 divided by 5 equals 12 gallons per minute.
How is COP calculated?
COP (Coefficient of Performance)
COP is defined as the relationship between the power (kW) that is drawn out of the heat pump as cooling or heat, and the power (kW) that is supplied to the compressor. For example: A given heat pump used for air cooling has a COP = 2.
How do you calculate cooling system?
Cooling Flow Calculation
- q=wCpΔt (Eq. Where.
- Q = (178.4*ti*kW)/(Δt*Pb) (Eq. Where.
- Q = (3160*KW)/ Δt (Eq. Recognizing that a given cooling application has numerous design considerations, a temperature rise of 15°F will usually yield effective cooling without incurring penalties of over sizing of the air moving device.
How is chiller RT calculated?
Divide Q (BTUs per hour) by 12,000 (the number of BTUs in one ton of cooling capacity). This yields the chiller capacity required to handle the process heat load in tons per hour: Example: 240,000/12,000= 20 tons/hr.
What is Q MCP ∆ T?
What is Q MC ∆ H?
5.1 Calculating ΔH using q = mcΔT (SL) – YouTube