Q: Water at a rate of 0.32 L/s and
Water at a rate of 0.32 L/s and a temperature of 27°C enters a No. 18 BWG 1.6 cm condenser tube made of nickel chromium steel (k = 26 W/m K ) . The tube is 3 m long, and its outside is heated by stea...
See AnswerQ: It is proposed to preheat the water for a boiler using flue
It is proposed to preheat the water for a boiler using flue gases from the boiler stack. The flue gases are available at the rate of 0.25 kg/s at 150°C, with a specific heat of 1000 J/kg K. The water...
See AnswerQ: A light oil flows through a copper tube of 2.6
A light oil flows through a copper tube of 2.6-cm ID and 3.2-cm OD. Air flows perpendicular over the exterior of the tube as shown in the following sketch. The convection heat transfer coefficient for...
See AnswerQ: Estimate the time required to freeze vegetables in thin, tin cylindrical
Estimate the time required to freeze vegetables in thin, tin cylindrical containers 15 cm in diameter. Air at 212°C is blowing at 4 m/s over the cans, which are stacked to form one long cylinder. The...
See AnswerQ: Hot water is to be heated from 10°C to 30
Hot water is to be heated from 10°C to 30°C at the rate of 300 kg/s by atmospheric pressure steam in a single-pass shell-and-tube heat exchanger consisting of 1-in. schedule 40 steel pipe. The surface...
See AnswerQ: Water flowing at a rate of 12.6 kg/s
Water flowing at a rate of 12.6 kg/s is to be cooled from 90°C to 65°C by means of an equal flow rate of cold water entering at 40°C. The water velocity will be such that the overall coefficient of he...
See AnswerQ: Water flowing at a rate of 10 kg/s through a
Water flowing at a rate of 10 kg/s through a 50-tube double-pass shell-and-tube heat exchanger heats air that flows through the shell side. The length of the brass tubes is 6.7 m, and they have an out...
See AnswerQ: An air-cooled low-pressure steam condenser is shown in
An air-cooled low-pressure steam condenser is shown in the following figure. The tube bank is four rows deep in the direction of air flow, and there are a total of 80 tubes. The tubes have a 2.2-cm ID...
See AnswerQ: Design (i.e., determine the overall area and a
Design (i.e., determine the overall area and a suit- able arrangement of shell and tube passes) a tubular feed-water heater capable of heating 2300 kg/h of water from 21°C to 90°C. The following speci...
See AnswerQ: Two engineers are having an argument about the efficiency of a tube
Two engineers are having an argument about the efficiency of a tube-side multipass heat exchanger compared to a similar exchanger with a single tube- side pass. Smith claims that for a given number of...
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