Chilled Water Cooling Coil Calculations

Commercial and industrial hvac and refrigeration cooling coil calculations can be made for either chilled water or evaporators dx pumped and gravity flooded with or without dehumidifying on the finside.

Chilled water cooling coil calculations. A chilled water system is a cooling system in which chilled water is circulated throughout the building or through cooling coils in an hvac system in order to provide space cooling. The chilled water pump is used to circulate chilled water in a closed system. The chilled water pump circulates return chilled water from the air handling units fan coil units back to the chiller. The program uses thermodynamically correct psychrometric calculations from cryogenic below 100c to very high above 100c air temperatures.

Water velocity feet per second fps water velocity fps gpm factor number of tubes fed tube diameter factor 5 8 od 1 085 1 2 od 1 704 3 8 od 3 050 as water velocity increases the capacity of a coil increases but so does the water resistance. You have the ideal size for your needs. In a chilled water coil the air is cooled and the water is heated q is positive. Oversize the chiller by 20 ideal size in tons tons x 1 2.

It is a balance between the desired capacity and the resultant 20. Cooling tower npsh online calculator. Now lets look at how to calculate the cooling capacity of a chiller in imperial units. Temperature difference online calculator.

The flow rate of chilled water into the evaporator is measured as 12 649ft3 h and the chilled water inlet temperature is 53 6 f the outlet temperature. Calculate tons of cooling capacity tons btu hr. At times it is convenient to calculate the heat transferred to the air stream by doing calculations on the water side of the coil. Coil load flow temperature difference wizard.

Types of cooling coils cooling coils are classified to direct expansion dx coils and chilled water coils as shown in figure 1. Row method will be presented to calculate the deta iled design of the cooling coil in order to enhance the calculation accuracy and trace the air and coil surface temperature locally. Calculate temperature differential t f t f incoming water temperature f required chill water temperature. This gives us a final answer of q 2 500kw of cooling.

Gallons per hr x 8 33 x t f. Part of an overall chilled water system that often includes a chiller piping valves fittings expansion tank air handling units and fan coil units. The above equations for air do not apply to the majority of cooling coils the equations for water apply to both heating and.