Water to a residential area is transported at a rate of 1.5 m3/s via 70-cm-internal-diameter concrete...

70.2K

Verified Solution

Question

Physics

Water to a residential area is transported at a rate of 1.5m³/s via 70-cm-internal-diameter concrete pipes with asurface roughness of 3 mm and a total length of 1520 m. In order toreduce pumping power requirements, it is proposed to line theinterior surfaces of the concrete pipe with 2-cm thickpetroleum-based lining that has a surface roughness thickness of0.04 mm. There is a concern that the reduction of pipe diameter to66 cm and the increase in average velocity may offset any gains.Taking Ï = 1000 kg/m³ and v = 1 Ã—10^â€“6 m²/s for water, determine the percentincrease or decrease in the pumping power requirements due to pipefrictional losses as a result of lining the concrete pipes. (Roundthe final answer to one decimal place.)

Answer & Explanation Solved by verified expert

4.0 Ratings (849 Votes)

Area of pipe before lining A pi 4 d2 pi 4072 A 03848 m2 Average velocity of flow V Q A V 150 03848 3898 ms Reyynolds number Re Vd v Re 3898070 1106 2728106 Re 4000 so See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member