Project : Al Andalus University Building TECCENTERHeating Load CalculationSizing Summary Description Date : August 6,2005Faculty Building

Sizing of Expansion Tanks1. Total Capacity of Expansion Tanks in Dormitory

Given:Boiler Capacity 750 galsRadiators 1416 galsAir Handling Unit 186 galsHeat Exchanger 264 galsWater Inside Pipe 654 gals

Total Gallons 3270 gals

Solution:

Pf = Static Pressure of the Fluid in the Tank when the system is filled (psig)H = Distance of the inlet of expansion Tank to the top of the system (ft)Dc = Density of the Fluid at its initial temperature (ib/ft3)Vt = Minimum required Tank volume (gals)Vs = Fluid Volume in the system (gals)

Vt = Vs (Dc/Dh-1)

14.7 (1/Pf+14.7 - 1/Prv+9.7)

Where :

Pf = H (Dc/144)+5H = 63FtVs = 1060 galsPrv = 90 psiDc = 62.4lb/ft3 @ 50 0FDh = 61.25lb/ft3 @ 150 0FPf = 46(62.4/144)N

= 27.3~28psi

Vt = 3270 (62.4/61.25-1) 14.7 (1/28+14.7 - 1/90+9.7)

= 61.4/0.22

Vt = 279 gals plus 10%= 306 gals

Project : Al Andalus University Building TECCENTERHeating Load CalculationSizing Summary Description Date : August 6,2005Faculty Building

= Say 310 gals