Heat is to be transferred from water to air through an aluminum wall. It is proposed that rectangular fins 0.05 in. thick and I in. long and spaced 0.08 in. apart be added to the aluminum surface to aid in transferring heat. The heat transfer coefficients on the air and water sides are 3 Btu/hr-ft2-~F […]

(0) A l-in.-OD steel tube has its outside wall surface maintained at 250°F. Itis proposed that the rate of heat transfer be increased by adding fins b. in. thick and iin. long to the outside tube surface. Compare the increase in heat transfer achieved by adding 12 longitudinal .straight fins against that achieved by adding

A 0.25-in.thick steel wall contains 0.125-in. diameter by OJ-in. long copper spines located on 0.37S-in. center-to-center spacing. The spine fins are placed in a square array. The heat transfer coefficient on the side of the wall without fins is 1,000 Btu/hr-ft2-°F. Devise a computer solution to calculate the value of UA for a 1_ft2section of

Attributes of the inlet streams to a heat exchanger are as follows: The product in Btu/hr- OF for the heat exchanger is given by where eh and e are the capacities in Btu/lir-E Using only s-NTU method, (a) Find the outlet temperatures and rating for a parallel-flow arrangement. (b) Find the outlet temperatures and rating for a

1. For what type of use are TEMA class C heat exchangers specified? 2. Sketch and label the important dimensions for a TEMA size 26-163 type AFN exchanger. 3. What does the word “CODE” mean in the TEMA standards?

Is surface FTD-2 [Fig. 3-20b] compact? Why are fins used in compact cross-flow heat exchangers? A shell-and-tube heat exchanger is designed for a given (specified) pressure drop along each tube. What happens to (1) the number of tubes required, (2) the friction factor, and (3) the heat transfer coefficient as the tube length is increased?

1. Explain why fouling degrades U A.  2. Sketch a TEMA size 20-90 type BOD exchanger. 3. Is a surface with a = 125 ft2 /ft3 compact?

1. For surface 8.0-iT, if ‘lll = 0.60, what is ‘lll ? 2. What is a tube sheet?

1. If the tube inside diameter is 0.300 in., find a for the tube-side flow for surface 8.0-iT. 2. A surface 8.0-i T is used as a heat-exchanger core. A cubic section of 1 ft3 is used. If hair = 10 Btu/hr-ftl-oF and hw = 400 Btu/hr-ft2-oF,evaluate U A. The fin material is aluminum; tube

In these assignment use the load breast cancer from sklearn.datasets  and discuss the causes of breast cancer and its treatment. However, the binary classification include 212 Malignant and 357 Benign cases Binary classification Malignant:Load breast cancer Briefly, use the load_breast_cancer() from sklearn.datasets to get a copy of the breast cancer (diagnostic) data with 569 instances