Questions from Principles Of Heat Transfer

Q: While flowing at the rate of 1.25 kg/s

While flowing at the rate of 1.25 kg/s in a simple counterflow heat exchanger, dry air is cooled from 65°C to 38°C by means of cold air that enters at 15°C and flows at a rate of 1.6 kg/s. It is plann...

Q: Saturated steam at 137 kPa condenses on the outside of a 2

Saturated steam at 137 kPa condenses on the outside of a 2.6-m length of copper tubing, heating 5 kg/h of water flowing in the tube. The water temperatures measured at 10 equally spaced stations along...

Q: Calculate the water-side heat transfer coefficient and the coolant pressure

Calculate the water-side heat transfer coefficient and the coolant pressure drop per unit length of tube for the core of a compact air-to-water inter- cooler for a 3.7 MW gas turbine plant. The water...

Q: An air-to-water compact heat exchanger is to be

An air-to-water compact heat exchanger is to be designed to serve as an intercooler for a 3.7 MW gas turbine plant. The exchanger is to meet the following heat transfer and pressure drop performance s...

Q: Draw the thermal circuit for heat transfer through a double-glazed

Draw the thermal circuit for heat transfer through a double-glazed or a double-paned window. Identify each of the circuit elements. Include solar radiation to the window and interior space.

Q: Microchannel compact heat exchangers can be used to cool high heat flux

Microchannel compact heat exchangers can be used to cool high heat flux microelectronic devices. The accompanying sketch on the next page shows a schematic view of a typical microchannel heat sink. Mi...

Q: The temperature of a 100-m-diameter cooling pond is

The temperature of a 100-m-diameter cooling pond is 7oC on a winter day. If the air temperature suddenly drops to -7 °C, calculate the thickness of ice formed after three hours.

Q: Hot water is used to heat air in a double-pipe

Hot water is used to heat air in a double-pipe heat exchanger as shown in the following sketch. If the heat transfer coefficients on the water side and on the air side are 550 W/m2 K and 55 W/m2 K re...

Q: Repeat Problem 10.6, but assume that a fouling factor

Repeat Problem 10.6, but assume that a fouling factor of 0.173 m2 K/kW based on the tube outside diameter has developed over time.

Q: The heat transfer coefficient of a copper tube (1.9

The heat transfer coefficient of a copper tube (1.9-cm ID and 2.3-cm OD) is 500 W/m2 K on the inside and 120 W/m2 K on the outside, but a deposit with a fouling factor of 0.009 m2 K/W (based on the tu...