Heat transfer problem.In a counter flow heat exchanger, water, flow rate 0.05kg/s, enters at 400K and leaves at 330k. The water is cooled by air that enters at 0.75 kg/s and 300K. The overall heat coefficient is 200 W/m2K. Assume air outlet is 320k only for evaluating the properties of the air. You can use saturated liquid water properties (a).what is the air outlet temperature.(b)log mean temperature difference (c)required heat transfer surface area.

Below data was obtained from an experimental activity for a parallel pipe heat exchanger. Arrangement: counterflow (cold fluid in annular and hot fluid in tube). Mass flow rate: - Hot fluid: 1.03 kg/s - Cold fluid: 0.91 kg/s Temperatures: - Hot fluid inlet (Th.1): 80.5 +/- 10% °C - Hot fluid outlet (Th2): 64.0 +/- 10% °C - Cold fluid inlet (Te1): 20.0 +/- 10% °C - Cold fluid outlet (Tc2): 41.0 +/- 10% °C Assume cp constant and equal to 4.2 kJ/kg-K. 1. State assumptions (at least 9 unique ones) and include references. 2. What is the log mean temperature difference in °C? 3. What is the heat transfer rate on the cold side in kW? Heat added or lost on cold side? 4. What is the heat transfer rate on the hot side in kW? Heat added or lost on hot side? 5. What is the effectiveness of the heat exchanger for the given conditions? 6. Calculate the propagation of uncertaintv in kW for part 3 (heat transfer rate on the cold side) and part 4 (heat transfer rate on the hot side).

1.23. Forced air flows over a convective heat exchanger in a room heater, sulting in a convective heat transfer coefficient h 200 Btu/h-ft?.°F. The surface temperature of the heat exchanger may be considered constant at 150 °F, and the air is at 65 °F. Determine the heat exchanger surface area required for 30 000 Btu/h of heating. Ans 1.765 fi?

i just need F, G, H answered!