A cylindrical hot water storage tank fired by natural gas having outer diameter of 46cm is to be purchased that can supply hot water at 60.
View the step-by-step solution to:

Question

# 1. A cylindrical hot water storage tank fired by natural gas having outer diameter of 46cm is to be purchased that

can supply hot water at 60℃. The wall of the tank has thickness of 2cm and is filled with foam insulation having k=0.03W/m.℃. The tank will be placed in the basement having temperature of 15℃.

1) Rate of heat loss from the tank?

2) The amount of heat loss per year?

3) Cost of heat lost per year if price of natural gas is 6cents/kWh.

4) A frost king water heat insulation blanket consisting of 3cm thick fibre glass insulation (k=0.035 W/m.℃) is available from a market for \$50. How much heat loss will be reduced annually if this blanket is installed?

5) How long will it take for this blanket to pay for itself ?

Assume:

- Tank Height: 2m

- Heat transfer coefficient of tank surface: 12W/m2K

- Fuel conversion efficiency: 60%

- Top and bottom surface of tank have negligible heat loss

Any other missing data can be assumed accordingly

### Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

### -

Educational Resources
• ### -

Study Documents

Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

Browse Documents