Engineering, 30.08.2019 18:20, liz77717
Acarnot heat engine receives heat at 750°c and rejects the waste heat to the environment at 30°c. the entire work output of the heat engine is used to drive a carnot refrigerator that removes heat from the cooled space at -25°c at a rate of 300 kj/min and rejects it to the same environment at 30°c. determine: i. the thermal efficiency of the heat engine ii. the coefficient of performance of the refrigerator iii. the work input to the refrigerator iv. the minimum rate of heat supply to the heat engine, and v. the total rate of heat rejection.
Answers: 2
Engineering, 04.07.2019 18:10, bckyanne3
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
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
Engineering, 04.07.2019 18:20, luisgonz5050
Find the kinematic pressure of 160kpa. for air, r-287 j/ kg k. and hair al viscosity of air at a temperature of 50°c and an absolute (10 points) (b) find the dynamic viscosity of air at 110 °c. sutherland constant for air is 111k
Answers: 3
Acarnot heat engine receives heat at 750°c and rejects the waste heat to the environment at 30°c. th...