An overhead 25 m-long, uninsulated industrial steam pipe of 100 mm diameter is routed through a building whose walls and air are at 25°C. Pressurized steam maintains a pipe surface temperature of 150°C, the coefficient associated with natural convection h= 10 W/m2K and the surface emissivity ℇ = 0.8What is the rate of heat loss from the steam line?If the steam is generated in a gas-fired boiler operating at an efficiency of ɳf = 0.90 and natural gas fuel is priced at Cg = $0.01 per MJ, what is the annual cost of heat loss from the steam line? An overhead 25-m-long, uninsulated industrial steampipe of 100 mm diameter is routed through a buildingwhose walls and air are at 25°C. Pressurized steammaintains a pipe surface temperature of 150°C, and thecoefficient associated with natural convection ish = 10W/m? · K. The surface emissivity is e = 0.8.(a) What is the rate of heat loss from the steam Jine?(b) If the steam is generated in a gas-fired boiler oper-ating at an efficiency of n, = 0.90 and naturalpriced at C, = $0.01 per MJ, what is the annualcost of heat loss from the line?%3Dgasis%3D

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Answered: An overhead 25 m-long, uninsulated…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

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An overhead 25 m-long, uninsulated industrial steam pipe of 100 mm diameter is routed through a building whose walls and air are at 25°C. Pressurized steam maintains a pipe surface temperature of 150°C, the coefficient associated with natural convection h= 10 W/m²K and the surface emissivity ℇ = 0.8

What is the rate of heat loss from the steam line?
If the steam is generated in a gas-fired boiler operating at an efficiency of ɳ_f= 0.90 and natural gas fuel is priced at C_g = $0.01 per MJ, what is the annual cost of heat loss from the steam line?

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