Engineering, 19.07.2019 00:20, Brainly264
There is a vapor compression type refrigeration cycle using the refrigerant hfc 134 a. in the condenser, it is isostatically cooled, the condensation temperature is 50 ° c., and the condenser outlet is the compressed liquid at 45 ° c. in the evaporator, it is isothermally heated, the evaporation temperature is 10 ° c. and the outlet of the evaporator is heated steam at 15 ° c. when the expansion valve performs isenthalpic expansion, and the adiabatic efficiency of the compressor is 0.70, answer the following questions. (a) calculate the specific enthalpy of the compressor outlet temperature, specific enthalpy, condenser outlet and evaporator outlet. (b) obtain the cooling operation coefficient of this system. (c) obtain the circulation amount of the refrigerant necessary for obtaining the cooling effect of 3.0 kw in this system.
Answers: 3
Engineering, 04.07.2019 18:10, niicoleassssssf
Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86
Answers: 2
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, siri5645
At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
Answers: 1
There is a vapor compression type refrigeration cycle using the refrigerant hfc 134 a. in the conden...
Mathematics, 25.06.2019 00:30
Mathematics, 25.06.2019 00:30
Mathematics, 25.06.2019 00:30
Mathematics, 25.06.2019 00:30