Practice

An office air handler's chilled-water coil cools $22{,}000\,\text{cfm}$ of standard air from $80\,°\text{F}$ dry bulb with an enthalpy of $31.5\,\text{Btu/lb}$ dry air to $55\,°\text{F}$ dry bulb with an enthalpy of $22.6\,\text{Btu/lb}$ dry air. Chilled water is supplied at $44\,°\text{F}$ and returns at $58\,°\text{F}$. The required chilled-water flow (gpm) is most nearly:

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