Questions from Principles Of Heat Transfer

Q: In a single-pass counter flow heat exchanger, 4536 kg

In a single-pass counter flow heat exchanger, 4536 kg/h of water enter at 15°C and cool 9071 kg/h of an oil having a specific heat of 2093 J/kg K from 93°C to 65°C. If the overall heat transfer coef...

Q: A steam-heated, single-pass tubular preheater is designed

A steam-heated, single-pass tubular preheater is designed to raise 5.6 kg/s of air from 20°C to 75°C, using saturated steam at 2.6 MPa (abs). It is pro- posed to double the flow rate of air, and in or...

Q: In the manufacture of can ice, cans having inside dimensions of

In the manufacture of can ice, cans having inside dimensions of 27.5 * 55 * 125 cm with 2.5 cm inside taper are filled with water and immersed in brine at a temperature of –12oC. For the purpose of a...

Q: For safety reasons, a heat exchanger performs as shown in

For safety reasons, a heat exchanger performs as shown in (a) of the accompanying figure. An engineer suggests that it would be wise to double the heat transfer area so as to double the heat transfer...

Q: In a single-pass counterflow heat exchanger, 1.25

In a single-pass counterflow heat exchanger, 1.25 kg/s of water enters at 15°C and cools 2.5 kg/s of an oil having a specific heat of 2093 J/kg K from 95°C to 65°C. If the overall heat transfer coeffi...

Q: Determine the outlet temperature of the oil in Problem 10.24

Determine the outlet temperature of the oil in Problem 10.24 for the same initial fluid temperatures if the flow arrangement is one shell pass and two tube passes. The total area and average overall h...

Q: Carbon dioxide at 427°C is to be used to heat

Carbon dioxide at 427°C is to be used to heat 12.6 kg/s of pressurized water from 37°C to 148°C while the gas temperature drops 204°C. For an overall heat transfer coefficient of 57 W/m2 K, compute th...

Q: An economizer is to be purchased for a power plant. The

An economizer is to be purchased for a power plant. The unit is to be large enough to heat 7.5 kg/s of pressurized water from 71°C to 182°C. There are 26 kg/s of flue gases (cp = 1000 J/kg K ) availab...

Q: Some automobile manufacturers are currently working on a ceramic engine block that

Some automobile manufacturers are currently working on a ceramic engine block that could operate without a cooling system. Idealize such an engine as a rectangular solid, 45 cm * 30 cm * 30 cm. Suppos...

Q: Water flowing through a pipe is heated by steam condensing on the

Water flowing through a pipe is heated by steam condensing on the outside of the pipe. (a) Assuming a uniform overall heat transfer coefficient along the pipe, derive an expression for the water temp...