Four buildings, shown in Fig. P1-30 as A, B, C, and D are to be cooled using a central chilled water facility, shown as Supply. The figure is considered to be close enough to a scale drawing to be used for preliminary layout purposes. Ethylene glycol, a commonly employed heat transfer liquid medium, is to be used. Average properties of the ethylene glycol in the temperature range of interest are density = 69.61bmlft specific heat = 0.569 Btu/lbm-R, and viscosity = 0.0133 Ibm/It-s, Cooling requirements are as follows:
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