This is part one of a two-part problem. Water at 2.0 kg/s enters the boiler at 40°C and 2000 kPa and exits the boiler at 2000 kPa. If the heat transfer rate into the boiler is 8 000 kW, what is the specific enthalpy (h) at the exit of the boiler? + A) 3831 kJ/kg OB) 4170 kJ/kg OC) 4167 kJ/kg D) none of A), B) or C) Boiler Turbine

A shell-and-tube heat exchanger uses hot oil at 100-C to heat air. The oil makes six tube passes and the air makes one shell pass. It requires 120 kg/min of air are to be heated from 20 to 80-C. The specific heat of the oil is 2.10 kJ/kg.-C, and its flow rate is 180 kg/min. Calculate the effectiveness in %. A 75 B) 85 C) 95 D) 65

Water is heated in a boiler. The inlet water enters as a saturated liquid at 5000 kPa and exits at same pressure but at 500°C. If the heat transfer to the boiler is 1200 kW, the mass flow rate through the boiler is: OA) 0.526 kg/s OB) 0.732 kg/s OC) 1.877 kg/s D) none of A) B) or C)

Please answer legibly.  Heat and Mass Transfer - Heat Exchanger Water at 95°F is heated with steam up to a temperature of 212°F. The mass of water is 110 lb and the heating times takes 1200s. a) Find the heat transfer rate of the process. Assuming 1-1 heat exchanger. b) Calculate the total area from a) given overall heat transfer coefficient is 14 BTU/hr·ft2·°F  c) From b), how many tubes of 2.5 in diameter and 12ft length should be used?