3. A 6 in x 20 ft uninsulated B.I pipe conveys steam at 385 °F with an average ambient temperature of 85°F. if the cost of the fuel is PhP 250.00 per 106 BTU with the net energy conversion efficiency of 75%, what is the annual cost of the heat lost? For 6 in. pipe schedule 80: Do = 6.625 in Di = 5.761 in For iron: k = 30 BTU/ hr ft °F for the surface coefficients: hi = 1000BTU/ hr ft2°F ho = 2 BTU/hr ft2 °F

3. A 6 in x 20 ft uninsulated B.I pipe conveys steam at 385 °F with an average ambient temperature of 85°F. if the cost of the fuel is PhP 250.00 per 106 BTU with the net energy conversion efficiency of 75%, what is the annual cost of the heat lost? For 6 in. pipe schedule 80: Do = 6.625 in Di = 5.761 in For iron: k = 30 BTU/ hr ft °F for the surface coefficients: hi = 1000BTU/ hr ft2°F ho = 2 BTU/hr ft2 °F

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.33P

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