Chilled Water Cooling Coil Calculations

Calculate tons of cooling capacity tons btu hr. 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. The program uses thermodynamically correct psychrometric calculations from cryogenic below 100c to very high above 100c air temperatures.

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The above equations for air do not apply to the majority of cooling coils the equations for water apply to both heating and.

Chilled water cooling coil calculations.

Calculate temperature differential t f t f incoming water temperature f required chill water temperature. 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. Cooling tower npsh online calculator.

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 principal objectives of chilled water pumping system selection and design are to provide the required cooling capacity to each load to promote the efficient use of. The chilled water pump circulates return chilled water from the air handling units fan coil units back to the chiller. At times it is convenient to calculate the heat transferred to the air stream by doing calculations on the water side of the coil.

Types of cooling coils cooling coils are classified to direct expansion dx coils and chilled water coils as shown in figure 1. Oversize the chiller by 20 ideal size in tons tons x 1 2. You have the ideal size for your needs. Gallons per hr x 8 33 x t f.

Now lets look at how to calculate the cooling capacity of a chiller in imperial units. It is a balance between the desired capacity and the resultant 20. This gives us a final answer of q 2 500kw of cooling. Chilled water cooling tower systems.

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. In a chilled water coil the air is cooled and the water is heated q is positive. 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 chilled water pump is used to circulate chilled water in a closed system.

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. Coil load flow temperature difference wizard. Full calculations are shown below.