Aheat exchanger consists of a bank of 1200 copper tubes (no fins) with hot air in cross-flow over the tubes and with cold water flowing inside the tubes. the tubes are arranged in-line, with 40 longitudinal rows (along the direction of airflow) and 30 transverse rows. the tubes are 0.0175-m inside diameter and 4-m long, with longitudinal and transverse pitches of 0.07 m. the outside tube diameter is 0.0185 m. the hot air enters the heat exchanger at 600 k and atmospheric pressure, and the cold water enters the heat exchanger at 300 k.

(a) sketch and label a schematic of the heat exchanger; reference this schematic as needed to explain calculation procedures. determine the exit temperatures of both the hot and cold air streams if the flow rate for the hot air stream is 30 kg/s and the flow rate of the cold stream is 15 kg/s. for ease of comparison, evaluate the hot fluid properties at 513 k and the cold fluid properties at 313 k.