Chilled Water Cooling Coil Calculations

Gallons per hr x 8 33 x t f.

Chilled water cooling coil calculations.

Calculate tons of cooling capacity tons btu hr. Calculate temperature differential t f t f incoming water temperature f required chill water temperature. Temperature difference 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.

Part of an overall chilled water system that often includes a chiller piping valves fittings expansion tank air handling units and fan coil units. Chilled water cooling tower systems. In a chilled water coil the air is cooled and the water is heated q is positive. The chilled water pump is used to circulate chilled water in a closed system.

Full calculations are shown below. 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. This gives us a final answer of q 2 500kw of cooling. 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. The program uses thermodynamically correct psychrometric calculations from cryogenic below 100c to very high above 100c air temperatures. 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.

You have the ideal size for your needs. The chilled water pump circulates return chilled water from the air handling units fan coil units back to the chiller. 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. Cooling tower npsh online calculator.

Coil load flow temperature difference wizard. It is a balance between the desired capacity and the resultant 20. Now lets look at how to calculate the cooling capacity of a chiller in imperial units.