Engineering, 01.10.2019 16:30 hewonabi123

Acomposite wall includes 8-mm-thick hardwood siding, 40-mm x 130-mm hardwood studs every 0.65 m with 130-mm thick fiberglass insulation filling the rest of the space, and a 12-mmthick layer of gypsum (vermiculite) wall board. the thermal properties of the building materials are k = 0.094 w/m/k for the hardwood siding, k = 0.16 w/m/k for the hardwood studs, k = 0.17 w/m/k for the gypsum, and k = 0.038 w/m/k for the fiberglass insulation. what is the thermal resistance associated with a wall that is 2.5m high by 6.5m wide ( having 10 studs, each 2.5m high)? assume surfaces parallel to the x-direstion are adiabatic.

Answers: 3

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

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

Answer

Engineering, 04.07.2019 18:20

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.

Answers: 2

Answer

Engineering, 04.07.2019 19:10

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

Answers: 2

Answer

Engineering, 04.07.2019 19:20

Asimple speed reducer is composed of 2 spur gears. the pinion gear has a pitch diameter of 0.75" and 36 teeth while the driven gear has a pitch diameter of 4.0" and 192 teeth. a)-what is the diametral pitch of each gear? b)-if an electric motor rotating ccw at 3000 rpm is coupled to the pinion, what is the rotational speed of the driven gear? c)-if the torque delivered to the pinion is 1 n-m, what is the torque on the driven gear? d)-what is the power transmitted by the gear train?

Answers: 1

Answer

You know the right answer?

Acomposite wall includes 8-mm-thick hardwood siding, 40-mm x 130-mm hardwood studs every 0.65 m with...

Questions