Engineering, 26.02.2020 01:20 keeks11
Consider a composite wall consisting of 1 cm of plywood (on the inside) and 11 cm brick (on the outside) separated by 10 cm of glass fiber blanket (of density 40 kg/m?). The interior of the wall is exposed to 21°C air with a convection coefficient of 20 W/m²K and the exterior of the wall is exposed to -10°C air with a convection coefficient of 50 W/m²K. The surface area of the wall is 300 m². a. Find the total thermal resistance, overall heat transfer coefficient, and heat transfer rate from the inside air to the outside air. b. If the convection coefficient of the outside air on a windy day was 250 W/m² instead, by what percentage would the heat transfer rate be different? c. Would you expect that radiation would significantly affect your calculations? Why or why not?
Answers: 1
Other questions on the subject: Engineering
Engineering, 04.07.2019 18:10, niyawilliams23
Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10
Answers: 1
Engineering, 04.07.2019 18:10, caitlynnpatton1208
Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.
Answers: 3
Engineering, 04.07.2019 18:10, agpraga23ovv65c
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
Engineering, 04.07.2019 18:20, karatsgrande3772
Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t
Answers: 3
You know the right answer?
Consider a composite wall consisting of 1 cm of plywood (on the inside) and 11 cm brick (on the outs...
Questions in other subjects:
