Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 28 Sep 2017 My Price 6.00

cylindrical bales of hay

Consider the cylindrical bales of hay in Problem 3.82. It is proposed to utilize the microbial energy generation associated with wet hay to heat water. Consider a 30-mm diameter, thin-walled tube inserted lengthwise through the middle of a cylindrical bale. The tube carries water at T∞,i = 20°C with hi = 200 W/m2 ∙ K.

 

(a) Determine the steady-state heat transfer to the water per unit length of tube.

(b) Plot the radial temperature distribution in the hay, T(r).

(c) Plot the heat transfer to the water per unit length of tube for bale diameters of 0.2 m ≤  D ≤ 2 m.

Problem 3.82

Large, cylindrical bales of hay used to feed livestock in the winter months are D = 2 m in diameter and are stored end-to-end in long rows. Microbial energy generation occurs in the hay and can be excessive if the farmer bales the hay in a too-wet condition. Assuming the thermal conductivity of baled hay to be k = 0.04 W/m ∙ K, determine the maximum steady-state hay temperature for dry hay ( = 1W/m3), moist hay ( = 10 W/m3), and wet hay ( = 100 W/m3). Ambient conditions are T∞=0°C and h = 25 W/m2 ∙ K.

Answers

Maurice Tutor
(5)
Status NEW Posted 28 Sep 2017 03:09 PM My Price 6.00

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