How do you calculate water for a cooling tower?

How do you calculate water for a cooling tower?

The mathematical equation for determining Average make up water loss in a cooling tower is Make-up Water = Evaporation(E) + Bleed off (B)+ Windage constant . Make up Water = (RR ( ΔT) / 1000) + (RR ( ΔT) / 1000) / C-1)+ 0.005.

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 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 the formula for the effectiveness of 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).

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.

How do you calculate make up water?

It is calculated by this equation:

1. Evaporation loss = 0.00085 Wc (T1-T2)
2. Drift loss = 0.02% water supply [for new development in eliminator design]
3. Blowdown = [ Evaporative loss – (COC – 1) x Drift loss] /(COC – 1)

What is TR capacity?

A ton of refrigeration (TR or TOR), also called a refrigeration ton (RT), is a unit of power used in some countries (especially in North America) to describe the heat-extraction capacity of refrigeration and air conditioning equipment.

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.

How do you calculate CHW flow rate?

Chilled Water Systems

1. Total Heat Removed. The total heat removed by an air condition chilled-water system can be calculated. h = 500 q dt (1) where.
2. Evaporator Flow Rate. The evaporator water flow rate can be calculated. qe = htons 24 / dt (2) where.
3. Condenser Flow Rate. The condenser water flow rate: qc = htons 30 / dt (3)

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.

What is the formula for CoP?

CoP = power output / power input. The higher the number, the more efficient the system.

How do you calculate kW and TR?

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.
…
Converting between Btu/h and Tons of Refrigeration.

How do you convert TR to CFM?

1 TR (Ton of Refrigeration) has 400 CFM of air flow as a standard. 1 TR (Ton of Refrigeration) has 400 CFM of air flow as a standard.

What is CP for water?

4.186 J/g°C

Water has a specific heat capacity of 4.186 J/g°C, meaning that it requires 4.186 J of energy (1 calorie) to heat a gram by one degree. is the change in temperature of the system.

What is the cooling rate of water?

The cooling rate has units of degrees/unit-time, thus the constant has units of 1/unit-time. The equation is shown below. For example, if a cup of water is at 90 degrees Celsius and the room temperature is at 25 degrees Celsius, a material constant of . 000256 , will give a cooling rate of 1 degree per 60 seconds.

How do you calculate water flow rate?

To calculate the water flow (in m3) multiply the average water velocity (in m/s) by the average width (in m) and by the average depth (in m). Water flow = 0.425 m/s x 1 m x 0.6 m = 0.255 m3/s. Note: remember that 1 m3 = 1 000 l so multiply by this to convert water flow measurements to litres per second (l/s).

What is the formula for calculating BTU?

You may be familiar with the formula BTUH = CFM x ΔT x 1.08. This same formula is often rearranged to use for determining airflow by measuring the heat input and temperature rise.

What is TDS cooling water?

Total dissolved solids (TDS): TDS in the circulating water is limited to 5,000 ppm maximum. Although TDS can be as high as 5,000 ppm in the circulating water, there are limits on individual ions such as calcium, which is typically limited to maximum 800 ppm as CaCO3.

What is a good COP value?

As we have seen, the performance of a heat pump can vary wildly depending on a number of factors, but generally speaking ground source heat pumps can regularly be found on the market with a COP greater than 4. Air source heat pumps tend to be less efficient, and a COP over 3 is considered good.

What is a COP value?

A COP value of 3 means that you get 3kWh of heat output for every 1kWh of electricity used to run the pump. Higher COP values represent a heat delivery that is relatively more efficient. For example, a COP value of 4 means that you get 4kWh of heat output for every 1kWh of electricity used to run the pump.

How many kW is 1 ton?

3.52 kW
Ton To kW Chart

What is the CFM formula?

CFM = (fpm * area), where fpm is the feet per minute. To find the cubic feet per minute, substitute the FPM value with the area after the area is squared.

How many CFM is a 1.5 ton unit?

600 CFM
How Many CFM For 1 – 6 Ton Units? ( Chart)

What is the CV for water?

Specific Heat of Water
For liquid at room temperature and pressure, the value of specific heat capacity (Cp) is approximately 4.2 J/g°C. This implies that it takes 4.2 joules of energy to raise 1 gram of water by 1 degree Celsius.

What is water density?

997 kg/m³Water / Density