5.17 A flow of 4000 cfm of air at 53 F and 95%

RH enters the reheat coil of a building zone. The

zone set temperature is 78 F and the zone sensible

heat ratio (SHR) is 0.8.

1. Determine the maximum sensible and total

load that can be met by the air flow and the

room RH at the maximum load.

2. Determine the reheat energy that must be

supplied to keep the zone at 78 as the

sensible load is decreased from the maximum

value to zero with the SHR remaining at 0.8.

The flow rate, temperature, and humidity of

the air supplied to the reheat coil remain the

same.