1. A fan connected to a grain dryer will move 12,500 cfm of air. The dryer system has a heater that will heat ambient air to 104° F. Ambient conditions are 60°F, 20% RH, and Patm = 14.7 psia. Determine the following: 1. Volume flow rate (Q) of heated air 2. Q of moist air leaving the dryer (Assume 92% RH) (cfm) 3. Quantity of sensible heat added to the ambient air (Btu/hr) 4. Relative humidity of heated air (entering the dryer). 5. Cost of heating air using a natural gas burner @ $7.50/MCF. Note that an MCF is 1,000 ft³. Assume a heating value for natural gas of 1050 Btu/ft³. Assume 35% efficiency when heating with natural gas. 2. Rework Problem 1 for ambient conditions of 50°F, 55% RH, and Patm = 13.5 psia.

1. A fan connected to a grain dryer will move 12,500 cfm of air. The dryer system has a heater that will heat ambient air to 104° F. Ambient conditions are 60°F, 20% RH, and Patm = 14.7 psia. Determine the following: 1. Volume flow rate (Q) of heated air 2. Q of moist air leaving the dryer (Assume 92% RH) (cfm) 3. Quantity of sensible heat added to the ambient air (Btu/hr) 4. Relative humidity of heated air (entering the dryer). 5. Cost of heating air using a natural gas burner @ $7.50/MCF. Note that an MCF is 1,000 ft³. Assume a heating value for natural gas of 1050 Btu/ft³. Assume 35% efficiency when heating with natural gas. 2. Rework Problem 1 for ambient conditions of 50°F, 55% RH, and Patm = 13.5 psia.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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