Question

Please read entirely what follows:

Note that the answers to this problem are given, they are the ONLY final answers you should get. Please circle your final answers to indicate that they are the same. I have including equation 8.55 and the entire table A-5 so please use them (additional properties if needed are at the far bottom so make sure to scroll all the way down). Please write extremely clear so I can read your work step by step. Thank you.

2. Ethylene glycol flows at 0.01 kg/s through a 3-mm diameter, thin-walled tube. The tube is coiled and submerged in a well-stirred water bath maintained at 25 °C. If the fluid enters the tube at 85 °C, what heat rate and tube length are required for the fluid to exit at 35 °C? See Table A-5 for fluid properties (you can evaluate these properties at an average temperature of 60 °C). You may assume the fluid is thermally fully developed, thus we can use Eqn. 8.55 to find the Nusselt number. (This is a reasonable assumption for now, although the fluid is thermally developing over much of the tube length. We will see later that other correlations are better). (Ans: qcon--1280 W, L-15.4 m)

Answer 1

tven that elyadl tnlet temperature n)-ene eool Outet temperature u)3c Water balt temperature CTc he mean temperature CT m)二 Aro table AS Censtder tere aot 333-3

삼 = " At 383 b 33 3-330 300-330| L2-r91-2-万네 K-060 333330

Where △Tem- ATO-ATT

no Nu 3.66 ぺ 128t 3부-오 X2 万ATm -q

A XO 003