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How do you calculate cooling coil size?

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How do you calculate cooling coil size?

Use the equation as stated above:

  1. Qwater = 500 * GPM (LWT – EWT)
  2. GPM = Q / 500 * (LWT – EWT)
  3. Delta T (water) = Q / 500 * GPM.
  4. Sensible and Latent Cooling.
  5. Q = The amount of heat transferred to or from the fluid (BTU/hr)
  6. M = Mass flow rate of the fluid (lb/hr)
  7. Delta H = The change in enthalpy of the fluid (BTU/lb)

How do I know what size heating coil I need?

The total wattage is calculated using the amount of airflow (SCFM) and the temperature rise (∆T) desired. (W=SCFM∙∆T /3 ) The wattage of each coil is the total wattage divided by the number of coils in the circuit. Most heaters use identical coils throughout the circuit to ensure that the load is balanced.

How do you size a heating coil?

The Main Heating Coil Airflow is equal to the Design Heating Airflow.

  1. Main Heating Coil Airflow = 500 cfm.
  2. Leaving Coil Temperature = 122.3 F.
  3. Entering Coil Temperature = 55.9 deg F.
  4. Main Heating Coil Capacity = (1.0882) x (500) x (55.9 – 122.3) = -36,128 Btu/hr = -36.1 MBh.
  5. Reheat Coil Airflow = 500 cfm.

What is coil capacity?

In a chilled water coil, the air temperature is higher than the water temperature; therefore, heat is removed from the air and given to the water. In a hot water heating coil or thermal liquid coil, the liquid is a higher temperature than the air; thus, the water or thermal liquid gives its BTU/hr capacity to the air.

How many CFM is a kW?

We typically recommend 70 CFM per kW for minimum CFM selection.

What is cooling coil load?

The total amount of heat, in British thermal units per hour, that must be removed from the air by the cooling coils.

How do you calculate cooling load?

Calculating a Home’s Cooling Load

  1. Determine the dimensions of the room or home that needs cooling. For a room, you can do this with a measuring tape.
  2. For a room, multiply its length by its width to get the square footage.
  3. Multiply the square footage by 20. This is the measure of the BTU cooling load of the space.

How is chilling cooling load 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.

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