Question: A system for heating water from an inlet temperature of Tm-20C to an outlet temperature of Tmo-60C involves passing the water through a thick-walled

A system for heating water from an inlet temperature of Tm-20C to

A system for heating water from an inlet temperature of Tm-20C to an outlet temperature of Tmo-60C involves passing the water through a thick-walled tube having inner and outer diameters of 20 and 40 mm. The outer surface of the tube is well insulated and electrical heating within the wall provides for a uniform generation rate of = 10W /m. Given that the Cp = 4179 J/kg.K at Tm. (i) For water mass flow rate of 0.1 kg/s, how long must the tube be to achieve the desired outlet temperature? [5 marks] If the inner surface temperature of the tube T, =70C at the outlet, what is the local (ii) convection heat transfer coefficient at the outlet? [5 marks]

Step by Step Solution

★★★★★

3.33 Rating (150 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Ts70C Di20mm Tmo 60c 3D TMi20C Imsulation Laimlet outlet Ass... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Chemical Engineering Questions!

A system for heating water with an inlet temperature of 25C to an exiting temperature of 70C involves passing the water through a thick-walled tube with inner and outer diameters of 25 and 45 mm,...

How long must a flute be in order to have a fundamental frequency of 262 Hz (this frequency corresponds to middle C on the evenly tempered chromatic scale) on a day when air temperature is 20.0oC? It...

A circular tube of outer diameter d3 = 70 mm and inner diameter d2 = 60 mm is welded at the right-hand end to a fixed plate and at the left-hand end to a rigid end plate (see figure). A solid...

A finned-tube, cross-flow heat exchanger is to use the exhaust of a gas turbine to heat pressurized water. Laboratory measurements are performed on a prototype version of the exchanger, which has a...

In the metal processing industry, heat treatment of metals is commonly done using electrically heated draw batch furnaces. Consider a furnace that is situated in a room with surrounding air...

Reconsider Prob. 1126. Using EES (or other) software, investigate the effects of pipe conductivity and heat transfer coefficients on the thermal resistance of the heat exchanger. Let the thermal...

1.A double-pipe heat exchanger is constructed of a copper (k = 380 W/m 0C) inner tube of internal diameter Di = 1.2 cm and external diameter Do=1.6 cm and an outer tube of diameter 3.0 cm. The...

A 10-cm high and 20-cm wide circuit board houses on its surface 100 closely spaced chips, each generating heat at a rate of 0.08 W and transferring it by convection to the surrounding air at 258C....

A large plane wall has a thickness L = 50 cm and thermal conductivity k = 25 W/m K. On the left surface (x = 0), it is subjected to a uniform heat flux q 0 while the surface temperature T 0 is...

A thin electrical heating element provides a uniform heat flux q;' to the outer surface of a duct through which air flows. The duct wall has a thickness of 10 mm and a thermal conductivity of 20 W/m...

1. Who should be responsible for properly disposing of electronic products no longer neededconsumers or manufacturers? Is it appropriate to ship e-waste to developing countries? Discuss alternative...

Do you think that it is ever justifiable to treat people differently on the basis of their race or sex or religion or other group characteristic? Explain. Should we further multiculturalism and...

A journal entry to record the sale of inventory on account will include a debit to Accounts Receivable. debit to Inventory. credit to Cost of Goods Sold . debit to Sales Revenue.

Independent and Dependent Events. In Exercise, (a) Determine whether events A and Bare independent or dependent. And (b) find P(A and B). The probability that events A and B both occur. A: When a day...

Suppose that we are to conduct the following hypothesis test: H0: =940 H1: >940 Suppose that you also know that =170, n=80, x=970.6, and take =0.05. Draw the sampling distribution, and use it to...

Why is understanding the relationship between the cash conversion cycle (CCC) and net working capital important to the contemporary business executive? Explain ways in which executive decisions...

From the e-Activity, evaluate the appropriateness of the techniques used and the common issues pursued by the IRS in corporate liquidations and dissolutions. Create an argument to defend the client...

If four years of college tuition cost $15,000 in 1990, what did it cost in 1965 if tuition increased at 7% per year between 1965 and 1990?

You will be provided with the supernatant of yeast suspensions that have been incubated in aerobic and anaerobic conditions, as well as the culture media in which they were grown. Steps 1 - 3 for the...

2. A system for heating water from an inlet temperature of 20C to an outlet temperature of 60C involves passing the water through a thick-walled tube having inner and outer diameters of 20 and 40mm....

A system for heating water from an inlet temperature of Tm , i = 2 0 \ deg C to an outlet temperature of Tm , o = 6 0 \ deg C involves passing the water through a thick - walled tube having inner and...

2. For an ideal gas prove that: AS TCS AT To RT + In V Vo R nire af A system for heating water with an inlet temperature of 25 C to an existing temperature of 70C involves passing the water through a...

In a Rankine power system, 1.5 kg/s of steam leaves the turbine as saturated vapor at 0.51 bar. The steam is condensed to saturated liquid by passing it over the tubes of a shell-and-tube heat...

A tube bank consisting of 2 0 0 tubes in ten rows high is used to heat air . In a Rankine power system, 1 . 5 k g s of steam leaves the turbine as saturated vapor at 0 . 5 1 bar and 2 3 0 4 k J k g )...

.. A new shell and tube condenser has been installed on a steam power plant with one shell pass and two tube passes. The tubes are thin walled. Steam condenses in the shell at a temperature of 110C...